Journal articles: 'Hydroelectric power plants. Electric power-plants'

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Aleksandrovskii, A. Yu, and P. S. Borshch. "Prediction of electric-power generation at hydroelectric power plants." Power Technology and Engineering 47, no. 2 (July 2013): 83–88. http://dx.doi.org/10.1007/s10749-013-0403-8.

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Rusina, A. G., Dzh Kh Khudzhasaidov, O. V. Naumov, and A. N. Gorlov. "Development of an intelligent system for integrated management of hydroelectric cascade modes." E3S Web of Conferences 124 (2019): 05019. http://dx.doi.org/10.1051/e3sconf/201912405019.

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The paper deals with an isolated electric power system (EPS) based on hydroelectric power plants. The analysis of the existing methods and approaches for investigation of modes of EPS which comprise hydroelectric power plants is presented. A mathematical model of a hydroelectric station cascade has been developed, which allows taking into account the hydraulic connection during calculation of electrical modes. A software tool for optimization the operating modes of hydroelectric power plants as part of the power system was developed. It uses redistribution the load between hydraulic units both inside the station and between hydroelectric complexes of cascade hydroelectric stations. The task of modeling power consumption and load graphs of EPS with specific properties, based on the application of artificial intelligence methods, is considered.

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Lezhnyuk, Petro, Iryna Hunko, Juliya Malogulko, Iryna Kotylko, and Lіudmyla Krot. "MODELING OF COMPATIBLE WORK OF DISTRIBUTED POWER SOURCES OF ELECTRIC POWER AND CENTRALISED POWER SUPPLY." TECHNICAL SCIENCES AND TECHNOLOG IES, no. 2 (12) (2018): 189–95. http://dx.doi.org/10.25140/2411-5363-2018-2(12)-189-195.

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Urgency of the research. Current trends of distributed generation development in Ukraine indicate a rapid generation in-crease from renewable energy plants. Most developed countries gradually refuse from the fossil fuels use and invest more and more to the “green” energy. Therefore, there is a need for a detailed study of the operation conditions of distributed energy sources due to their instability, as well as the processes that arise in distribution electric networks with diverse types of distributed energy sources. Target setting. In the producing process of power energy by distributed energy sources due to the increase in their num-ber, there are situations where several renewable sources of energy operate to only one system of buses. Thus, such distributive networks acquire the features of a local power system, which complicates the control process of such systems, and also there is a problem with the electricity supply of consumers. Actual scientific researches and issues analysis. The analysis of publications suggests that in literature more attention is paid to studying the operating modes of solar power plants, or small hydroelectric power plants. However, almost no attention was paid to the study of their cooperation work. Uninvestigated parts of general matters defining. Only a few works are devoted to the study of the cooperation of the diverce sources of distributed energy sources in the local electrical systems. That is why, their impact on power distribution networks and on the grid in general has not been studied extensively. The research objective. In this article was considered the influence of asynchronous generators on small hydroelectric power plants on the operation modes of distribution electrical networks, and were investigated the processes that are occurring in local power systems with different types of distributed energy sources. The statement of basic materials. Based on the research results, was developed a computer model of a such system in the PS CAD software environment. Two solar stations and one small hydroelectric power station with an asynchronous generator were connected to the power supply. It was shown the simulation of two modes of operation: a joint operation of a small hydroelectric power station, two solar power stations and a power supply center; a joint operation of a small hydroelectric pow-er plant, two solar power stations and a power supply disconnected. Conclusions. As a result of computer simulation, it is shown that by switching on a small hydroelectric power plant with an asynchronous generator in the case of an emergency shutdown of centralized power supply, it is possible to restore the work of solar power plants, and thus partially or completely restore the power supply of consumers.

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Tsgoev, Ruslan S. "Promising Osmotic and Hybrid Electrochemical Power Plants." Vestnik MEI 5, no. 5 (2020): 47–53. http://dx.doi.org/10.24160/1993-6982-2020-5-47-53.

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A range of energy technologies ultimately aimed at obtaining electric energy is considered. Proceeding from the list of considered sources, it is possible to analyze their different combinations for achieving better energy efficiency of new complexes. A systematic list of 21 currently known traditional, non-traditional, and renewable energy sources is compiled. Each of them taken individually has an efficiency not exceeding 50%, except for some types of fuel cell based power facilities. Block diagrams of energy flow conversion stages are proposed for the considered kinds of sources. Obviously, if some or other chain does not contain certain blocks in comparison with the first classical chain of thermal engine thermodynamic cycles, this means that the missing energy conversion stages of are either implemented covertly, or proceed in the environment. As an example, two promising sources are considered: an osmotic hydroelectric power plant and a hybrid power plant (HybPP) based on high-temperature fuel cells with solid oxide electrolyte and a gas turbine unit. In fact, an osmotic hydroelectric power plant takes the solar energy spent for evaporation from sea surfaces in the form of the osmotic pressure phenomenon energy under the conditions of one-way diffusion of fresh river water (a solvent) molecules through a semi-permeable membrane towards salt sea water (a solution). An osmotic HPP is a combination of a reservoir with semi-permeable membranes and an HPP. The former is characterized by the expected high specific power up to 12 kW per square meter of semi-permeable membrane area, and the latter is characterized by the highest efficiency among all types of electric power sources and by the high achieved specific power up to 2-3 kW per square meter of solid oxide electrolyte surface area.

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Быстров, Andrey Bystrov, Юсим, Vyacheslav Yusim, Филиппов, and V. Filippov. "Economic Potential of Pumped-Storage Hydroelectric Power Plants." Economics of the Firm 4, no. 3 (September 17, 2015): 26–29. http://dx.doi.org/10.12737/17591.

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The article deals with questions of using pumped-storage hydroelectric power plants in electrical power system. Maneuverable reserve of Russian electrical power system is exhausted; therefore further development is able only with the presence of storage plants in the system which will allow getting additional volume of electricity with existent generative power stations. However, low return of investment slows down construction of storage plants. PSP exert a powerful economic effect on system which is undervalued. Therefore for ensuring a return on investment it is necessary to revise system of economic relations within industry when using system utilities.

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Davies, S. "Big ideas for small hydro [hydroelectric power plants]." Engineering & Technology 6, no. 1 (February 1, 2011): 52–54. http://dx.doi.org/10.1049/et.2011.0108.

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Onoda, Takashi, Norihiko Ito, and Hideaki Koreeda. "Data Indicating Malfunction Sign of Hydroelectric Power Plants." IEEJ Transactions on Industry Applications 131, no. 4 (2011): 448–57. http://dx.doi.org/10.1541/ieejias.131.448.

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Chukreyev, Mikhail. "Power price in the conditions of market relations UES of Russia." E3S Web of Conferences 216 (2020): 01047. http://dx.doi.org/10.1051/e3sconf/202021601047.

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In modern conditions of market relations in the electric power industry, a mechanism is needed to regulate the purchase and sale of power, which should not lead to a deterioration in the EPS reliability. Competitive power take-off became the main component of this mechanism. Within its framework, nuclear power plants, hydroelectric power plants, new power units, as well as thermal power plants, which are necessary for heat supply to consumers, are mandatory selected. The article examines the process of price formation for capacity, its relationship with demand, shows the main features that affect its final indicators.

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CHERNYH, O. N., A. V. BURLACHENKO, and V. V. VOLSHANIK. "SPECIFIC FEATURES OF WATER-ENERGY REGIMES OF HPP IN SYMBIOSIS WITH SOLAR PLANTS." Prirodoobustrojstvo, no. 3 (2021): 104–10. http://dx.doi.org/10.26897/1997-6011-2021-3-104-110.

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The results of the analysis of the problems associated with the development of the world solar energy are presented. It is noted that at the present stage of the electric power industry, the potential of renewable energy sources (RES) is still poorly realized. The specific issues of water-energy modes of operation of hydroelectric power plants (HPPs), operating in symbiosis with solar photovoltaic installations (SPEU) have been identified, the schedule of which should be the same. It is shown that the operation of hydroelectric power plants and SPEU in the joint electric load schedule makes it possible to obtain a constructive and economic effect due to the fuel saving of power plants of various types, including thermal ones. The maximum capacity of the HPP-SPEU power complex is optimized by the installed capacity of the HPP while observing the full duplication of the SPEU capacity by other power plants of the energy system. It is shown on the example of the Lagdo hydroelectric complex in the northern Cameroon that under the conditions of developing countries with a large solar and hydraulic potential (Cameroon, Zimbabwe, Uganda, etc.), as well as for the southern regions of Russia, SPEU can produce up to 75% of the annual electricity generation during the low-water period of the year at its joint work in the energy complex with the hydroelectric power plant. This makes it possible to facilitate the redistribution of the river fl ow during the entire low-water period without attracting additional useful storage capacity of the reservoir. The developed methodology for optimizing the water-energy regulation regime can also be applied during the operation of the HPP of the HPP-SPEU energy complex along the watercourse, i.e. with daily flow regulation.

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Devianti, Devianti, Ramayanty Bulan, Purwana Satriyo, and Dewi Sartika T. "Kajian kapasitas daya pembangkit listrik tenaga air melalui pendekatan debit rencana metode rasional di sub-DAS Lawe Sempali, Provinsi Aceh." Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) 10, no. 2 (July 3, 2020): 307–19. http://dx.doi.org/10.29244/jpsl.10.2.307-319.

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Nowadays, electricity is a basic human need that must be available. Therefore, efforts to obtain electrical energy from renewable natural resources continue to be explored, especially water energy from watersheds and sub-watersheds. Aceh Province is a relatively widely available area of watersheds and sub-watersheds. This study aims to analyze and categorize the potential of electric power generated by the Lawe Sempali sub-watershed, Aceh province, as a source of hydroelectric power. The method used in this research is the study of literature and field studies. The rainfall analysis of the ten year return period plan was carried out with four approaches, namely (i) normal distribution method (ii) normal log distribution method, (iii) Gumbel distribution method, and (iv) Pearson III log distribution method. Discharge plans that occur are analyzed using the rational method. The categorization of the power capacity of hydroelectric power plants is based on the capacity that can be produced by the sub-watershed. The results of this study were to report that the Lawe Sempali Sub-watershed has the potential to be a source of hydroelectric power generation in the category of micro-hydro and or small-hydro power plants. The capacity of electric power generated with planned discharge in the shortest return period (2 years) is a minimum of 68.21 KW (head 2 m) and a maximum of 3.41 MW (head 100 m).

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Kos, Željko, Bojan Đurin, Dragana Dogančić, and Nikola Kranjčić. "Hydro-Energy Suitability of Rivers Regarding Their Hydrological and Hydrogeological Characteristics." Water 13, no. 13 (June 27, 2021): 1777. http://dx.doi.org/10.3390/w13131777.

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The production of electric energy from rivers by using mini, as well as micro hydroelectric power plants, is a very promising solution, especially in rural and isolated areas. Numerous waterways in Croatia and their hydrological and hydrogeological diversity present an opportunity, but also a challenge, for the construction of hydroelectric power plants. Due to the complexity of the water courses’ hydrology, as well as hydrogeological characteristics, it is very hard to determine an appropriate flow pattern (amount), which will be used as an input value for the sizing of hydroelectric power plants. Such analysis will be provided for real case studies in Croatia with special regard to present geological media—media with intergranular porosity (Bednja River), karst media (Gornja Dobra River), and flysch media (Mirna River). Considering different geological media increases the possibility of using the presented methodology on other locations in Croatia, as well in the world. It has been shown that the analyzed rivers definitely have potential for electric energy production, regarding the potential and kinetic river energy. The presented analysis is scientifically original, but also shows the procedure for the determination of the hydro-energy potential of the rivers, as well as for the sizing on the hydropower plants. Hydrology and hydrogeology analyses rounds out the usual hydro-energy analysis, which is in most cases based on basic statistical parameter analysis.

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Mahor, Amita, and Saroj Rangnekar. "Mathematical Modelling of Omkareshwor Hydro-electric plant at Narmada River." Hydro Nepal: Journal of Water, Energy and Environment 3 (May 26, 2009): 48–52. http://dx.doi.org/10.3126/hn.v3i0.1906.

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Madhya Pradesh state is forced to optimize the utilization of its water resources due to continuous depletion of the fossil fuels and its present power generation scenario. The state has two cascade schemes of hydro-electric plants one at Chambal river and the other at Narmada river. Narmada river at present has four main hydro plants in cascading mode starting from Bargi, Indira Sagar and Omkareshwar in Madhya Pradesh to Sardar Sarovar in the neighboring state of Gujrat. The installed capacities of 2810 MW of these hydro plants feed to the major portion of state's electricity demand. The proper scheduling of the hydroelectric plants mean, water resources must be used in such a way that, water discharge at an upstream plant is converted into electric energy at downstream plants without spillage. Hydroelectric scheduling of the plants requires a judicious modeling of each of the hydro electric plant for an improved efficiency and arrest possible losses. The paper presents the mathematical model of the Omkareshwar hydroelectric plant as part of cascade scheme at Narmada River in Madhya Pradesh. Key words: Hydro-electric system, hydro turbine model, reservoir model, tailrace model, water flow equation. Hydro Nepal: Journal of Water, Energy and Environment Issue No. 3, January, 2008 Page 48-52

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Pavelková, Eva Mazegue, and Iva Živělová. "Pricing Electric Power in the Czech Republic and in Selected Countries." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 64, no. 3 (2016): 1001–11. http://dx.doi.org/10.11118/actaun201664031001.

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This paper focuses on state intervention in the pricing of electricity from renewable power sources in the Czech Republic when compared with the pricing in the Slovak Republic, Germany, France and Italy. In these countries the state intervention is implemented in different forms, but the critical part of the price is regulated everywhere by the state. The price of electricity is determined by its production costs, which depend on the source from which electricity is produced. The highest cost of electricity is required to generate renewable energy, particularly solar power, while the lowest costs of power are associated with its production by coal-fired and natural gas-fired thermal power plants. However, hydroelectric power plants attain clearly the lowest cost for generating electricity. State intervention includes supporting power generation from renewable power sources by guaranteeing purchase prices.

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Hraniak, Valerii, Ihor Kupchuk, and Volodymyr Gontar. "METHOD AND DEVICE OF DIRECT AUTOMATED MEASURING CONTROL OF THE INSULATION OF THE WINDING OF ELECTRIC MACHINES." ENGINEERING, ENERGY, TRANSPORT AIC, no. 2(109) (August 27, 2020): 129–37. http://dx.doi.org/10.37128/2520-6168-2020-2-14.

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Today, the vast majority of technological processes, both production and agriculture, are based on the use of electric machines. Among which, a significant part of production equipment requires the use of electric motors, the power of which exceeds hundreds of kilowatts. Such electric machines have also become widespread as generating equipment, where they are an integral part of power plants, both using traditional energy sources (thermal power plants, nuclear power plants, etc.), and renewable (hydroelectric power plants, wind farms, etc.), where the unit power of a single electrical machine is usually higher than in other sectors of economy. When operating such equipment, systems for monitoring a significant number of technological parameters are often used, and in real time it characterizes the modes of their operation. This approach makes it possible to increase the reliability of operation and, with a fairly high probability, to avoid large-scale man-made threats that can be caused by an emergency failure of power electric machines (including powerful electric generators), which are quite often accompanied by the destruction of supporting structures, structural elements of industrial premises and can pose a threat to the life and health of production personnel. But the use of even the most modern systems for monitoring the technical condition does not provide one hundred percent reliability, and when operating electrical machines with a nominal power of the order of units of MW and below, their use can significantly increase the total cost of equipment with a still quite high level of occurrence of a serious man-made accident. Therefore, the development of direct methods and means for measuring the technical parameters of electrical machines in general, and insulation parameters in particular, is an urgent scientific and applied problem. In the article was proposed a new method of direct automated measuring control of insulation of windings of an electric machine, based on the use of combined signals to determine the technical parameters of the insulation of electrical machine units. And also, the design of the measuring control has been developed, it implements the proposed method.

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Reyes, Alberto, L. Enrique Sucar, Pablo H. Ibargüengoytia, and Eduardo F. Morales. "Planning Under Uncertainty Applications in Power Plants Using Factored Markov Decision Processes." Energies 13, no. 9 (May 6, 2020): 2302. http://dx.doi.org/10.3390/en13092302.

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Due to its ability to deal with non-determinism and partial observability, represent goals as an immediate reward function and find optimal solutions, planning under uncertainty using factored Markov Decision Processes (FMDPs) has increased its importance and usage in power plants and power systems. In this paper, three different applications using this approach are described: (i) optimal dam management in hydroelectric power plants, (ii) inspection and surveillance in electric substations, and (iii) optimization of steam generation in a combined cycle power plant. For each case, the technique has demonstrated to find optimal action policies in uncertain settings, present good response and compilation times, deal with stochastic variables and be a good alternative to traditional control systems. The main contributions of this work are as follows, a methodology to approximate a decision model using machine learning techniques, and examples of how to specify and solve problems in the electric power domain in terms of a FMDP.

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Awasthi, Shambhu Ratan, Vishnu Prasad, and Saroj Rangnekar. "Strategic Planning for Operation of Large Hydropower Plants." Hydro Nepal: Journal of Water, Energy and Environment 14 (October 16, 2014): 53–58. http://dx.doi.org/10.3126/hn.v14i0.11266.

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Electricity is an integral part of modern life. The main sources of power generation continue to be the fossil fuels which are largely responsible for global warming. In view of environmental concerns, there is increasing awareness on judicious use of natural resources, including water. Large hydroelectric power plants are generally multi-purpose projects and require huge quantities of water for their operation. Usually the generating units in a hydroelectricpower plant are put in operation to meet the electrical load demand without considering the efficiency of the units, which can lead to excessive water use. It is now need of the hour to pay more attention to optimizing the utilization of water in hydroelectric power plants.This paper presents strategic planning for optimal operation of large hydroelectric power plants. Large variation inefficiency of a Francis turbine forms the basis of proposed methodology in which turbines are operated at maximum efficiency. In one approach, discharge is minimized for constant load operation thus conserving water. In another approach, generation is maximized with the same quantity of water. The fringe benefits include creation of operating reserve and availability of additional reactive power in the generator.DOI: http://dx.doi.org/10.3126/hn.v14i0.11266HYDRO Nepal JournalJournal of Water, Energy and EnvironmentVolume: 14, 2014, JanuaryPage: 53-58

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Khristoforov, Evgenii S., and Konstantin K. Il’kovskii. "Prospects of Сreating Аloating Solar Power Plants in Russia." Economic Strategies 144 (November 20, 2020): 126–35. http://dx.doi.org/10.33917/es-7.173.2020.126-135.

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Technologies for converting solar energy into electrical energy are constantly improved, new methods of using solar energy are emerging in order to increase efficiency and save space. One of such methods is application of special buoyancy modules and restraints systems for installing solar power plants in water basins. The main technologies and operation principle of floating solar power plants (SPP) are described. Advantages and disadvantages of using floating solar power plants in comparison with ground-based solar power plants are listed and substantiated. Assessment of potential of installing floating SPP at hydroelectric power plants (HPP) in Russia is given. Prospects for the use of floating SPP in open water areas are discussed and examples of such projects are listed.

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Vasilyev, Yu S., V. V. Elistratov, I. G. Kudryasheva, M. M. Mukhammadiyev, and B. U. Urishev. "Use of maneuverable properties of hydroelectric power plants and hydro-accumulating power plants for improving reliability and operating efficiency of electric power systems of commonwealth countries (using example of power plants of Russia and the Republic of Uzbekistan)." E3S Web of Conferences 216 (2020): 01139. http://dx.doi.org/10.1051/e3sconf/202021601139.

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The possibilities of using shunting properties of HPP units, HAPS (Hydro-accumulating power system) for energy storage and redistribution, as well as Pump Station as a consumer of the regulator in night load dips to increase the reliability of the electric power system (EPS) in the conditions of the current increase in the share of non-nondestructive capacities in Russia and Uzbekistan and the implementation of programs for the development of renewable energy sources, primarily the construction of wind and solar power plants, were considered.

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Mohammed, Bashar S., Ean Lee Woen, M. A. Malek, Wong Leong Sing, Nor Aishah Abbas, Hanafi Yusop, Rahsidi Sabri Muda, Mustafa Hashim, and Usoff Yong. "Development of Sediment Brick Utilizing Reservoir Sediment and Fly Ash." Applied Mechanics and Materials 420 (September 2013): 276–80. http://dx.doi.org/10.4028/www.scientific.net/amm.420.276.

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Electrical companies generate electricity mainly from two major types of plant; hydroelectric plants and thermal plants. Hydroelectric is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water through dams operation. The sedimentation of such dams over years will cause large capacity losses of the dams. Thermal plants generate electricity through coal-fired power plants which produce millions tons of fly ash yearly. This fly ash accumulates rapidly and causes enormous problems of disposal. Therefore, the research work presented in this paper is dealing with utilizing reservoir sediment and fly as to form brick under pressure. Sediment brick can be produced as a load bearing brick with compressive strength is greater than 7 N/mm2.

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Chukreev, Yurii. "Influence of generation representation on reliability balance indicators and their support means in managing the development of electric power systems." E3S Web of Conferences 216 (2020): 01046. http://dx.doi.org/10.1051/e3sconf/202021601046.

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The issues of presentation generating equipment when solving the problem of substantiating the operational reserve of power in the UES of Russia are considered. The influence of the adopted composition of equipment, various modeling of capital and medium repairs, accounting for the energy supply of hydroelectric power plants on the values of indicators balance reliability and means their support is given.

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Kuznetsov, Nikolai M., and Valerii A. Minin. "The role of the Kola nuclear power plant in Murmansk region energy." Transaction Kola Science Centre 11, no. 7-2020 (December 30, 2020): 72–81. http://dx.doi.org/10.37614/2307-5252.2020.7.19.009.

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The determining value of the Kola NPP in the structure of the Kola electric power system is shown. The mutually complementary operation of the 1,760 MW KAES with seventeen hydroelectric power stations with a capacity of about 1,600 MW and two 240 MW thermal power plants makes the region's power supply system unique, producing the cheapest electricity in the North-West of Russia. The issues related to the further extension of the operating life of the existing nuclear power plant and the construction of theKola NPP-2 in the future are considered.

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Langston, Lee S. "Running in Place." Mechanical Engineering 139, no. 06 (June 1, 2017): 32–37. http://dx.doi.org/10.1115/1.2017-jun-1.

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This article highlights technological performance improvements in the gas turbine industry and its likely future course. While the outlook for commercial aviation gas turbines is bright, the non-aviation segment is decidedly clouded. While analysts have focused on the growing demand for electricity worldwide, the average output of each individual gas turbine unit is also increasing, and at a rate that is faster than that of electricity demand. Gas turbine power plants also have the advantage of dispatchability, which wind, hydroelectric, and solar often do not. A recent econometric study of renewable electric power implementation shows that the use of fast-reacting fossil technologies such as gas turbines to hedge against variability of electrical supply made it more likely to result in the successful investment and use of renewables. The article suggests that gas turbine power plants are cost-effective and can provide a necessary backup to the variability of renewable power plants. Gas turbines combine low cost and fast reaction time in a way that will enable the grid to handle winds dying down unexpectedly or unpredicted heavy clouds diminishing solar power output.

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Sachdev, Hira Singh, and Ashok Kumar Akella. "Small Hydro Power Schemes: Technical Aspects." International Journal of Advances in Applied Sciences 6, no. 1 (March 1, 2017): 55. http://dx.doi.org/10.11591/ijaas.v6.i1.pp55-63.

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<p>Small hydro systems play a major role in meeting power requirements of remote, isolated, hilly areas in a decentralized manner by tapping water streams, rivulets and canals of small discharge. Small hydroelectric system captures the energy in flowing water and converts it to electricity.</p>Of all the non-conventional renewable energy sources, small hydro stands first as it is more resourceful, reduces system losses, environment friendly, non-consumptive and source is renewable due to their enormous advantages over large hydro and other power plants, lot of small hydro-power plants have come up across the world to meet the ever increasing demand of electrical energy. Lowering the high initial cost of the small hydro-power plants and its popularization is today’s challenges. This paper describes basic techniques design of the small hydro-power development.

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Solikin, Akhmad, and Rohib Ilma Suktawan. "WATER POWER GENERATOR FOR PUBLIC ROAD ILLUMINATION LIGHTS OF PADI VILLAGE MOJOKERTO." BEST : Journal of Applied Electrical, Science, & Technology 2, no. 2 (September 7, 2020): 37–44. http://dx.doi.org/10.36456/best.vol2.no2.3476.

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Electricity problems in rural areas more and more electric power is needed. Until now, power plants that use water turbines are environmentally friendly electricity producers, so the potential for energy from the air needs to be utilized to address the demand for electricity. Therefore, the solution to this problem is to use the "Design and Construction of Hydroelectric Generator for Public Street Lighting". The generator is a source of electric voltage obtained by converting mechanical energy into electrical energy. The generator works based on the principle of electromagnetic induction, which is by rotating a coil in a magnetic field so that the induced GGL (Electric Motion Force) arises. In this thesis, a research is conducted on the Water Turbine Generator in the river in the village area of Padi Gondang Mojokerto as an object of water flow in order to generate electric power to reduce crime in the area in the form of a load object in the form of Public Street Lighting.

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., Sugeng, Taufiqur Rokhman, Paridawati ., and Agus Sofwan. "RANCANG BANGUN PROTOTIPE GARDU PEMBANGKIT LISTRIK HYBRID MIKRO HIDRO DAN SEL SURYA SEBAGAI MEDIA PEMBELAJARAN PRAKTIKUM TEKNIK ELEKTRO." Jurnal E-Komtek (Elektro-Komputer-Teknik) 2, no. 1 (February 16, 2019): 1–9. http://dx.doi.org/10.37339/e-komtek.v2i1.89.

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In the Department of Electrical Engineering,Islamic University "45" Bekasiuntil now does not have a laboratory of Renewable energy. In this research, a hybrid power plants have been designed by combined between hydroelectric power plants and solar power plants.From the design result of the Solar Cell Power Plant, obtained that for 1 to 4 pieces of 100 Wp solar panels obtained the generation voltage of 21.12 volts generating power of 18.80 Watts on average time for 7.8 hours. Whereas for MHP the average voltage is 10.81 Volt and the generation power is 41.48 Watts for 8 hours of use.

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Shuxrat, Dungboyev, Abdumalik Karimov, and Nilufar Karshiyeva. "Questions of development and use of renewable energy sources for low power enterprises." E3S Web of Conferences 216 (2020): 01132. http://dx.doi.org/10.1051/e3sconf/202021601132.

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Main problems of traditional and renewable energy development in the ecological context are considered in the article. The experience of developed industrial states in solving environmental problems and the work carried out in this direction in our country is presented. Today, many countries have a number of renewable energy targets: reducing greenhouse gas emissions, increasing the share of renewable energy sources in final energy consumption and meeting the growing demand for energy. Thus, the use of such sources of electricity as wind turbines, solar power plants or small hydroelectric power plants in the minimum configuration, which includes only an energy converter (wind turbine with a PVC generator or a hydraulic turbine with a generator) and a device for converting electric current parameters to standard values (inverter, stabilizer), not in able to provide high-quality and guaranteed constant power supply to the consumer.

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Pryganov, S. G., and V. N. Panov. "Application of an Electromechanical Drive for Controlling the Guide Apparatus and Impeller Blades of Hydraulic Turbines of Hydroelectric Power Plants/Pumped-Storage Electric Power Plants (HPPs/PSPs)." Power Technology and Engineering 54, no. 6 (March 2021): 825–28. http://dx.doi.org/10.1007/s10749-021-01294-3.

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Yang, Jian, Jihua Han, Tong Wu, Hao Zhang, and Lixia Shang. "Sizing and optimization of on-grid hybrid renewable energy systems considering hydroelectric energy storage." Journal of Intelligent & Fuzzy Systems 40, no. 1 (January 4, 2021): 1521–36. http://dx.doi.org/10.3233/jifs-192017.

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The economic development of any country is closely linked with the consumption of energy. Therefore, international policies encourage increasing penetration of renewable energy sources (RES) into the electrical grid in order to reduce CO2 emissions and cover ever-increasing demands. However, high variance of RES complicates their integration into power systems and complicates their transition from central to distributed energy sources. On the other hand, increasing the penetration of RES in electrical networks stimulates the demand for large capacity for energy storage. This paper presents a new approach to optimize the size of on-grid renewable energy systems integrated to pumped storage system using Salp Swarm Algorithm (SSA). This approach allows the examination of various energy sources and their combination to handle the optimal configuration of the hybrid system. The simulation and optimization process of the studied system have been carried out by MATLAB programming. The impact of the system under study on the grid is examined according to the power exchange values between the system and the grid. Moreover, different scenarios have been introduced for optimal operation. The simulation results indicate that these hybrid systems can reduce power exchange with the grid and ensure that the proposed system is economically and environmentally feasible. Furthermore, the results indicate the technical feasibility of seawater hydroelectric power plants in increasing the capacity of the electric grid to allow for high penetration of RES. Finally, the results showed that the best minimum value of the objective function is 3.9113 and showed that CO2 emission can be reduced about 29.65% per year compared to the conventional power plants.

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Beloborodov, Sergey S., and Aleksey A. Dudolin. "Prospects for Combined Generation of Heat and Electricity at a Combined Heat and Power Plant in a Modern Power System." Vestnik MEI 5, no. 5 (2020): 54–66. http://dx.doi.org/10.24160/1993-6982-2020-5-54-66.

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Given the climatic and geographical conditions of the Russian Federation, the development of cogeneration should become the main line of measures aimed at increasing the energy efficiency and reducing greenhouse gas emissions in the country. However, the implementation of programs for development of renewable energy sources (RES) and nuclear power plants (NPP) entails risks of decreasing the amount of combined generation of electricity and heat by combined heat and power plants (CHPP) in the daily load curve base part. The current state of the wholesale market of electric power is characterized by critical conditions for the existing CHPPs in the first price zone of the wholesale market. The electric power cost formed from competitive power bid (CPB) results is such that the incomes earned by heat generating facilities are insufficient for fully covering the costs of their overhauls and modernization of their equipment. The “old” heat generation facilities, including CHPPs, subsidize the development of combined cycle power plants (CCPPs), RES, hydroelectric power plants (HPPs), and NPPs. The Russian Federation energy system development projects must be elaborated taking into account the results from a multivariate analysis of operational, technical, technological, economic, environmental, and social aspects. The heat supply schemes for cities and municipalities are developed subject to ensuring the preset level of reliability with minimizing its cost for the end customer. The minimum cost of heat supply can only be achieved for the optimal structure of heat and electricity generation capacities. This structure must incorporate equipment able to operate in the base, semi-peak, and peak parts of the daily electric load curve, and provide a power margin for passing seasonal maximums in the consumption of electricity and heat. The main milestones of the establishment and evolution of the energy system of Russia are considered. The main trends are shown along with the problems that have arisen in the operation of cogeneration power facilities in connection with the influence of new energy sources. The experience gained in leading foreign countries that have introduced RES is analyzed, and the influence of these sources on the power system balance is studied. The prospects of using combined electricity and heat generating facilities represented by highly maneuverable small- and medium-capacity gas turbine-based CHPPs in the semi-peak and peak parts of the daily electric load curve are analyzed.

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Kabanda, Herve, Alex Romard, Fuze Yurtsever, Anjali Wadhera, Joshua Andrews, and Craig Merrett. "Construction Time Estimation Function for Canadian Utility Scale Power Plants." Energies 14, no. 17 (August 31, 2021): 5421. http://dx.doi.org/10.3390/en14175421.

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Construction time and time overruns for infrastructure projects have been frequently studied; however, the construction time of power plants has not been studied. This lack of study is problematic, as more renewable energy power plants, such as wind and solar, are planned for many jurisdictions. Accurately estimating the construction time of a power plant will assist construction planning, budget estimates, and policy development encouraging the use of more renewable sources. The construction times of utility scale power plants in Canada were studied using publicly available data. Multiple linear regression analysis techniques were applied to the data to generate construction time estimation functions for all power plants together, and for individual technologies. The analyses reveal that construction time is sensitive to jurisdiction and the decade of construction, indicating that decisions made by individual Canadian provincial governments at different times had statistically significant impacts on construction time. The analyses also indicated that construction time is a strong function of installed capacity, independent of technology. This finding suggests that large solar or wind energy facilities will encounter longer construction times similar to large hydroelectric facilities.

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Sudirman, Weddy Bernadi, and Sarwono Hardjomuljadi. "Project Risk Management in Hydropower Plant Projects." Journal of Infrastructure Development 3, no. 2 (December 2011): 171–86. http://dx.doi.org/10.1177/097493061100300205.

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The development of hydroelectric power plant is one of the efforts in utilising water resources for people’s welfare by generating the energy for electricity purpose. Nowadays, the installed capacity of hydro electric power plants is 3,529 MW from the total installed capacity 24,846 MW from various power plants owned by PT PLN (Persero) and the hydropower potential 75,000 MW all over Indonesia. Hydroelectric power plant has complex structures and involves large amounts of capital with a long-running construction period. This situation imposes uncertainty factors with considerably high risks. The construction phase is identified as a critical phase in hydropower projects where many unforeseen factors occur. Failure to manage project risks leads to significant problems for the client such as completion time delays and cost overruns. In order to prevent time delays and cost overruns in hydropower construction in PT PLN (Persero), the study on project risk management in the construction stage of hydropower plant projects had been conducted. The purpose of this study was to identify and measure the importance of construction risks and to determine the level of agreement or disagreement between the client, consultants and contractors on the ranking of construction risk in hydropower projects. The author selected the respondents from the clients, consultants and contractors’ personnel who had work experience in hydropower construction projects in PT PLN (Persero). JEL Classification: L74—Construction

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Satir, Secil, Yildirim B. Kestane, and Sertan Dogru. ""A Generator": A Mini Hydroelectric Apparatus as Renewable Source of Energy." International Journal of Engineering Pedagogy (iJEP) 8, no. 3 (May 28, 2018): 81. http://dx.doi.org/10.3991/ijep.v8i3.8221.

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Abstract--The matter is considered in the scope of sustainability and initially the basis and content of the term is defined. Based on this definition, the qualities of water and water energy are inspected as water is one of the most important type of clean energy source. Water energy is a time-honored renewable energy whose use dates back to earliest periods in history. The subject titled “A Generator” is a small but significant support to environmental protection as it defines a patented object which generates energy from water with a mini apparatus. Protection of future lives of creatures and keeping them in infinite existence necessitate taking measures in advance. Concepts such as environment protection, sustainability, green energy, green economy etc. have also been under consideration by the UN since the 1970s. The subject is very comprehensive. This paper inspects as required hydroelectric power plants which produce clean energy and date back to ancient times. Water, as main source of hydroelectric power plants, is collected in proper basins and thus provided with potential energy. Water is then dropped from heights to trigger its kinetic energy and canalized to turbine wheels, moving which it turns kinetic/mechanical energy into electric power. This basic characteristic of water is evaluated in a mini apparatus this time. And an apparatus of unaccustomed size is obtained, which could support electricity production in household wet areas.

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Siqueira, Hugo, Mariana Macedo, Yara de Souza Tadano, Thiago Antonini Alves, Sergio L. Stevan, Domingos S. Oliveira, Manoel H. N. Marinho, et al. "Selection of Temporal Lags for Predicting Riverflow Series from Hydroelectric Plants Using Variable Selection Methods." Energies 13, no. 16 (August 16, 2020): 4236. http://dx.doi.org/10.3390/en13164236.

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The forecasting of monthly seasonal streamflow time series is an important issue for countries where hydroelectric plants contribute significantly to electric power generation. The main step in the planning of the electric sector’s operation is to predict such series to anticipate behaviors and issues. In general, several proposals of the literature focus just on the determination of the best forecasting models. However, the correct selection of input variables is an essential step for the forecasting accuracy, which in a univariate model is given by the lags of the time series to forecast. This task can be solved by variable selection methods since the performance of the predictors is directly related to this stage. In the present study, we investigate the performances of linear and non-linear filters, wrappers, and bio-inspired metaheuristics, totaling ten approaches. The addressed predictors are the extreme learning machine neural networks, representing the non-linear approaches, and the autoregressive linear models, from the Box and Jenkins methodology. The computational results regarding five series from hydroelectric plants indicate that the wrapper methodology is adequate for the non-linear method, and the linear approaches are better adjusted using filters.

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Lindstrom, Frankz, Gustavo Riveros, Massimo Rivarolo, and Gustavo Arevalos. "Assessment of a solar plant solution interconnected to national grid system in Paraguay." E3S Web of Conferences 113 (2019): 01010. http://dx.doi.org/10.1051/e3sconf/201911301010.

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Paraguay has abundant hydroelectric energy (around 99%, in 2017 a generation reached 96,387 GWh) and it is currently exporting part of this energy. Some studies carried out by the National Electricity Administration indicate an increase in the demand for electric power where it is observed that the Reserve Generation Margin would be affected by the year 2025. To face this scenario, Paraguay is investigating alternative sources to diversify its energy production mix: this paper focuses on solar plants. Within the Electric System Master Plan, Paraguay aims to expand and improve the electric power supply system, mainly in the western part of the country in the central region of the Paraguayan Chaco. In this context and based on the experience of the Itaipu Technology Park in the installation and operation of the first two solar plants in the country, already in operation in the mentioned region, the aim of this paper is the evaluation of a future photovoltaic solar plant in the area of Loma Plata, which will be connected to the national interconnected grid system, with a power around of 10 MWp. For this purpose, a thermoeconomic analysis with a software tool is used to evaluate the viability of the proposal, evaluate different configurations and select the best option for the case study.

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Galvis, J. C., A. Padilha-Feltrin, and J. M. Yusta Loyo. "Cost assessment of efficiency losses in hydroelectric plants." Electric Power Systems Research 81, no. 10 (October 2011): 1866–73. http://dx.doi.org/10.1016/j.epsr.2011.05.006.

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Hongqing Fang, Long Chen, N. Dlakavu, and Zuyi Shen. "Basic Modeling and Simulation Tool for Analysis of Hydraulic Transients in Hydroelectric Power Plants." IEEE Transactions on Energy Conversion 23, no. 3 (September 2008): 834–41. http://dx.doi.org/10.1109/tec.2008.921560.

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Godinho, Gabriel Campos, and Delberis Araújo Lima. "Security of power supply in hydrothermal systems: Assessing minimum storage requisites for hydroelectric plants." Electric Power Systems Research 188 (November 2020): 106523. http://dx.doi.org/10.1016/j.epsr.2020.106523.

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Rojas Suarez, Jhan Piero, Mawency Vergel Ortega, and Sofia Orjuela Abril. "Study of the application of energy generation systems with mini hydroelectric." Revista Boletín Redipe 10, no. 4 (April 26, 2021): 275–86. http://dx.doi.org/10.36260/rbr.v10i4.1271.

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Year after year, environmental studies show exponential growth in greenhouse gas emissions from thermos-electric plants and generators that use fossil fuels such as coal, oil, and natural gas, among others. This highlights the importance of an urgent calling to countries for developing to the maximum the implementation of clean and renewable energy. Being Colombia, the 4th country in the world to have a wide hydraulic capacity, it is one of the poorest in the implementation of regulations and incentives, by government entities, for the use of this resource in the generation of renewable energy, governments like China, they have understood the advantage that the use of these energy alternatives implies, being pioneers in the implementation of small plants in rural areas where access to electricity grids is difficult. The development of this type of generators opens up a range of opportunities for Colombia, but the most interesting is the possibility of diversifying the energy matrix and the advantage of being able to reach small communities and towns that do not have this benefit, such as electrical energy. At this point, the implementation of the mini-micro power stations is key, which is perfect for meeting these needs.

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Menéndez, Javier, Falko Schmidt, Heinz Konietzky, Antonio Bernardo Sánchez, and Jorge Loredo. "Empirical Analysis and Geomechanical Modelling of an Underground Water Reservoir for Hydroelectric Power Plants." Applied Sciences 10, no. 17 (August 24, 2020): 5853. http://dx.doi.org/10.3390/app10175853.

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The European Union policy of encouraging renewable energy sources and a sustainable and safe low-carbon economy requires flexible energy storage systems (FESSs), such as pumped-storage hydropower (PSH) systems. Energy storage systems are the key to facilitate a high penetration of the renewable energy sources in the electrical grids. Disused mining structures in closed underground coal mines in NW Spain have been selected as a case study to analyze the construction of underground pumped-storage hydropower (UPSH) plants. Mine water, depth and subsurface space in closured coal mines may be used for the construction of FESSs with reduced environmental impacts. This paper analyzes the stability of a network of tunnels used as a lower water reservoir at 450 m depth in sandstone and shale formations. Empirical methods based on rock mass classification systems are employed to preliminarily design the support systems and to determinate the rock mass properties. In addition, 3D numerical modelling has been conducted in order to verify the stability of the underground excavations. The deformations and thickness of the excavation damage zones (EDZs) around the excavations have been evaluated in the simulations without considering a support system and considering systematic grouted rock bolts and a layer of reinforced shotcrete as support system. The results obtained show that the excavation of the network of tunnels is technically feasible with the support system that has been designed.

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Amado, Nilton Bispo, Erick Del Bianco Pelegia, and Ildo Luís Sauer. "Capacity Value from Wind and Solar Sources in Systems with Variable Dispatchable Capacity—An Application in the Brazilian Hydrothermal System." Energies 14, no. 11 (May 30, 2021): 3196. http://dx.doi.org/10.3390/en14113196.

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The most robust methods to determine the capacity contribution from intermittent sources combine load curve, variable generation profile, and dispatchable generators’ data to calculate any new inserted variable source’s capacity value in the power system. However, these methods invariably adopt the premise that the system’s dispatchable generators’ capacity is constant. That is an unacceptable limitation when the energy mix has a large share of hydroelectric sources. Hydroelectric plants are dispatchable sources with variable maximum power output over time, varying mainly according to the reservoirs’ level. This article develops a method that makes it possible to calculate the capacity value from renewable resources when the dispatchable generation units of an electric system have variable capacity. The authors apply the method to calculate the capacity value from solar and wind sources in Brazil as an exercise. By abandoning the hypothesis of constant dispatchable capacity, the developed approach is in principle extensible for other energy-limited resources, such as batteries and concentrating solar power (CSP). This can be a strategy to incorporate energy-limited capacity sources into the planning and operation models as reliable capacity sources.

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Бабенко, В. В., И. А. Хайченко, and Ю. В. Нефедов. "APPLICATION OF THE EXPERIMENTAL FACTOR PLANNING METHOD FOR REALIZING REACTIVE POWER COMPENSATION SETTING SYSTEM SETTINGS." ВЕСТНИК ВОРОНЕЖСКОГО ГОСУДАРСТВЕННОГО ТЕХНИЧЕСКОГО УНИВЕРСИТЕТА, no. 5() (November 18, 2020): 50–55. http://dx.doi.org/10.36622/vstu.2020.16.5.007.

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Рассматривается способ координации настроек локальных систем автоматического регулирования установок компенсации реактивной мощности (РМ) городской системы электроснабжения для достижения оптимального режима работы всей системы по критерию минимума потерь электрической энергии. На основе анализа базы данных автоматизированной системы коммерческого учета электроэнергии МУП «Воронежская горэлектросеть» за пять лет определено, что величина tg φ (коэффициент реактивной мощности) не соответствует нормируемым ГОСТом значениям и требует существенной корректировки для снижения потерь электрической энергии. Оптимальный режим управления рассматриваемой системой электроснабжения по месту подключения и величине реактивной мощности требуемых установок компенсации возможен при правильном соотношении выбранных критериев локальной и системной оптимизации режимов работы ГЭС. Определено, что для получения экономически обоснованного эффекта от оптимизации режима работы ГЭС по критерию достижения tg φ не более 0,35 необходима установка устройств компенсации РМ как минимум на 50% -70% всех параметров реактивной мощности узла нагрузки (РП) энергоемких потребителей. Кроме того, показана целесообразность использования при данном способе компенсации реактивной мощности регрессионного принципа автоматического управления, базирующегося на методе факторного планирования эксперимента. При наличии базы данных параметров городской системы электроснабжения возможно получить серию уравнений регрессии, являющихся основой для настроек локальной системы управления установок компенсации реактивной мощности, которые необходимо установить в основных узловых точках РП МУП «Воронежская горэлектросеть». Установлено, что сформированные на базе уравнений регрессии параметры для системы управления успешно могут быть интегрированы в современные цифровые микропроцессорные регуляторы установок компенсации реактивной мощности сложных систем электроснабжения This article discusses how to coordinate the settings of local automatic control systems of reactive power compensation plants of a city power supply system in order to achieve the optimal mode of operation of the entire system according to the criterion of minimum loss of electric energy. Based on the analysis of the database of the automated system of commercial accounting of electricity of Municipal Unitary Enterprise "Voronezh City Electric Network" for five years, it was determined that the value of tg φ (reactive power factor) does not correspond to the values normalized by GOST and requires significant adjustment to reduce electrical energy losses. The optimal control mode of the considered power supply system at the point of connection and the value of reactive power of the required compensation plants is possible with the correct ratio of the selected criteria of local and system optimization of the hydroelectric power station operation modes. It was determined that in order to obtain an economically justified effect from optimizing the mode of operation of the hydroelectric power station according to the criterion of tg φ reaching a maximum of 0.35, it is necessary to install RM compensation devices at least 50% -70% of all RP energy-intensive consumers. In addition, the utility of using the regression principle of automatic control c based on the factor planning method of the experiment in this reactive power compensation method is shown. At sufficiently low costs for collection, processing of statistical material and optimization calculations, it is possible to obtain a series of regression equations, on which the calculated part of the settings of the control system of reactive power compensation plants, which should be installed in the main nodes of the Voronezh City Electric Network, is based. It was found that the parameters generated on the basis of regression equations for the control system can be successfully integrated into modern digital microprocessor regulators of reactive power compensation plants of complex power supply systems

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Dergachev, P. A., P. A. Kurbatov, and O. N. Molokanov. "A magnetic multiplier with a controllable reduction ratio for wind and small hydroelectric power plants." Russian Electrical Engineering 84, no. 4 (April 2013): 206–11. http://dx.doi.org/10.3103/s1068371213040020.

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Godoy, Janeth Carolina, Daniel Villamar, Rafael Soria, César Vaca, Thomas Hamacher, and Freddy Ordóñez. "Preparing the Ecuador’s Power Sector to Enable a Large-Scale Electric Land Transport." Energies 14, no. 18 (September 11, 2021): 5728. http://dx.doi.org/10.3390/en14185728.

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The Ecuador’s expansion plans for the power sector promote the exploitation of hydro power potential, natural gas and a small share of alternative renewable energies. In 2019, electricity generation reached 76.3% from hydroelectric power, 21.9% from thermal plants and 1.8% from other renewable resources. Although the power energy mix is mainly based on renewable technologies, the total energy demand is still dependent on fossil fuels, which is the case of the transport sector that alone accounted for 50% of the total primary energy consumed in the country. This paper analyzes the pathway to develop a clean and diversified electricity mix, covering the demand of three specific development levels of electric transportation. The linear optimization model (urbs) and the Ecuador Land Use and Energy Netwrok Analysis (ELENA) are used to optimize the expansion of the power system in the period from 2020 to 2050. Results show that reaching an electricity mix 100% based on renewable energies is possible and still cover a highly electrified transport that includes 47.8% of land passenger, and 5.9% of land freight transport. Therefore, the electrification of this sector is a viable alternative for the country to rely on its own energy resources, while reinforcing its future climate change mitigation commitments.

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Jiménez, Juliana, John E. Cardona, and Sandra X. Carvajal. "Location and optimal sizing of photovoltaic sources in an isolated mini-grid." TecnoLógicas 22, no. 44 (January 15, 2019): 61–80. http://dx.doi.org/10.22430/22565337.1182.

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This article introduces a new mixed integer linear programming model that guarantees the optimal solution to the location and sizing problem of distributed photovoltaic generators in an isolated mini-grid. The solar radiation curves of each node in the mini-grids were considered, and the main objective was to minimize electric power losses in the operation of the system. The model is non-linear in nature because some restrictions are not linear. However, this article proposes the use of linearization techniques to obtain a linear model with a global optimal solution, which can be achieved through commercial solvers; CPLEX in this case. The proposed model was tested in an isolated 14-bus mini-grid, based on real data of topology, demand and generation adapted to a balanced operation. This model shows, as a result, the optimal location of photovoltaic generators and their optimal capacity produced by the maximum active power delivered at the maximum solar irradiation time of the region. It is also evident that the hybrid operation between small hydroelectric power plants and photovoltaic generation improves the network voltage profile and the electric power losses without the use power storage systems.

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Radulescu, Victorita. "Research and Solutions to Minimize Frontal Area Overheating of Hydro Generator Stator with Vertical Axis." Energies 14, no. 5 (February 24, 2021): 1243. http://dx.doi.org/10.3390/en14051243.

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About ten hydroelectric power plants realized from 1970 to 1990 in Romania are confronted with stator overheating. The developed mathematical model analyzes the voltage stability based on modal analysis of the Jacobian matrix, identifying the hazardous modes of variation between voltage and flow rate, correlated with the characteristics of the analyzed generators and their response to these variations. Vulnerable elements in the system for inductive and capacitive modes of operation are identified. In these conditions, hydro generators cannot attend the secondary voltage control, not even for a frequency power dependency control. The elaborated mathematical model was tested at the hydroelectric power plants Gilceag, Mariselu, and Susag with similar functioning conditions. The necessary conditions for stator ventilation and variation of flow hydrodynamic parameters during the operation were established. The theoretical model was tested with an experimental method applied separately for the thermal and ventilation conditions. Some results obtained during the measurements are illustrated and correlated with the theoretical results. The model was tested to prevent the onset instability of voltage drops and accelerated overheating. Finally, some solutions to minimize the stators overheating based on local conditions are recommended.

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Rosas Maximiliano, Miguel, Salome Gonzales Chávez, and Alex Poccomo Coquil. "MAXIMIZACIÓN DE LA EFICIENCIA A CARGAS PARCIALES DE UNA CENTRAL HIDROELECTRICA MULTIGRUPO INTEGRADA AL SISTEMA INTERCONECTADO NACIONAL." Revista Cientifica TECNIA 25, no. 2 (February 23, 2017): 35. http://dx.doi.org/10.21754/tecnia.v25i2.48.

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En una Central Hidroeléctrica multigrupo que opera a cargas parciales, la máxima eficiencia de cada grupo y el de la combinación aleatorias de estos, difieren de la eficiencia de diseño de la central a plena carga. Estas centrales están condicionadas a operar a cargas parciales, tanto en épocas de estiaje como en tramos de sobreoferta eléctrica del sistema interconectado nacional. El periodo de estiaje en Perú alcanza a nueve meses del año, situación que implica pérdidas económicas debido a la inadecuada regulación del caudal y elección de grupo, a condiciones de eficiencias por debajo de sus valores óptimos. El objetivo de este trabajo es el desarrollo de un proceso de optimización de la eficiencia de una Central Hidroeléctrica multigrupo, para cualquier nivel de potencia a generar en el programa diario de generación interconectada. Como resultados se obtiene la maximización de la eficiencia y combinación de turbinas-grupo para cada potencia de salida de la central fuera de sus condiciones nominales; asimismo se construye un programa computacional en Matlab que alimenta al sistema automatizado de la central. Su aplicación está permitiendo reducir costos de generación y disponibilidad de la central, a su vez conforma un patrón metodológico de uso en otras centrales hidroeléctricas multigrupo. Palabras clave.- Central hidroeléctrica multigrupo, Cargas parciales, Maximización, Despacho económico, Estiaje, Sistema interconectado nacional.. ABSTRACTIn multigroup hydroelectric plant operating at partial loads, the maximum each group efficiency and the random combination of these, differ from the design efficiency of the plant at full load. These plants are conditioned to operate at partial loads, both in times of drought and periods of oversupply national electric grid. The period of drought in Peru is nine months per year, a situation that involves economic losses due to inadequate flow regulation and group choice efficiencies conditions below their optimum values. The aim of this work is the development optimizing efficiency process of a multigroup hydroelectric power plant, for any level of power generated in the daily interconnected generation program. The results are maximizing turbine efficiency and combined-group for each power output of the plant, outside its nominal conditions, also a computer program is constructed in Matlab to integrate the automated system of hydroelectric power plant. Its application can reduce generation costs and increases plant availability; also forms a methodological pattern of use in other multigroup hydroelectric plants . Keywords.- Multigroup hydroelectric plant, Partial loads, Maximization, Economic dispatch, Time of drought, National grid.

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Stefenon, Stéfano Frizzo, Matheus Henrique Dal Molin Ribeiro, Ademir Nied, Kin-Choong Yow, Viviana Cocco Mariani, Leandro dos Santos Coelho, and Laio Oriel Seman. "Time series forecasting using ensemble learning methods for emergency prevention in hydroelectric power plants with dam." Electric Power Systems Research 202 (January 2022): 107584. http://dx.doi.org/10.1016/j.epsr.2021.107584.

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Kizar, Ahmed Naeem, and Riyadh Z. Azzubaidi. "Utilizing the Main Outfall Drain-Addalmage Lake System for Hydroelectric Power Generation." Journal of Engineering 25, no. 7 (July 1, 2019): 104–17. http://dx.doi.org/10.31026/j.eng.2019.07.06.

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The basic idea of the Main Outfall Drain, MOD, was to construct a main channel to collect saline drained water of the irrigation projects within central and southern parts of Iraq and discharge it down to the Arabian Gulf. The MOD has a navigation lock structures near Addalmage Lake at station 299.4km. This structure is designed to ensure navigation within the MOD. The water level difference upstream the cross regulator and the downstream conjugation structure is about 9m. This head difference can be used to generate electrical power by constricting a low head power plant. This study aimed to utilize the head difference in navigation lock structures for power generation. Different operation condition and locations plants were examined. Hydrologic and hydraulic simulations were used to analyze the system of the MOD-Addalmage Lake system. Results showed that the water level are kept below the dike level along the reaches in the all alternatives and the maximum average annual power generated vary between 3.41MW to 5.55MW depending on the selected alternative of operation and the site of the plant

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El Hamdaouy, Achour, Issam Salhi, Mohamed Dahbi, Driss Oulad-Abbou, and Said Doubabi. "Design of a Low-Cost Autonomous Controller, Management and Security System for Pico-Hydroelectric Power Plants." Journal Européen des Systèmes Automatisés 53, no. 1 (February 29, 2020): 29–38. http://dx.doi.org/10.18280/jesa.530104.

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da Silva Christo, Eliane, Kelly Alonso Costa, Lidia Angulo Meza, and Caroline de Oliveira Costa Souza Rosa. "Life Cycle Energy Analysis for Energy Planning of the Rio De Janeiro State." Advanced Materials Research 962-965 (June 2014): 1660–63. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.1660.

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Abstract:

The human development would not be possible without energy. But the way electricity has been generated and fuels have been burnt causes serious impacts in environment. Our current society is concerned about these problems, and studies have been carried out to find renewable power sources and ways to use energy as efficient as possible. In this context, we will study the electrical generator park of Rio de Janeiro State, which is composed by hydroelectric plants, one wind farm, thermal plants and two conventional thermonuclear plants, having reached an installed capacity of 7.991 MW in 2012. In this same year, the electric generation in the state was 51.633 GWh, which accounted for 9,3% of national production, while the electricity consumption of 50.746 GWh represented 10,2% of the country's consumption. An increase in electricity consumption is expected for the next years due to the heating of the state economy, the large industrial investments and the great international events which will take place there. Therefore, the state will have to expand the capacity of its electric generating facilities, preferably in a sustainable and efficient way. This project aims to study how energy is used and generated in Rio de Janeiro State and begin to compile its energy inventory, so that, further studies can be conducted in order to make a comparative of these energy sources through the life cycle energy analysis seeking viable alternatives to the electricity demand in the state.

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Journal articles on the topic 'Hydroelectric power plants. Electric power-plants'

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