Journal articles: 'Electric power systems. System analysis'

1

Karamov, Dmitriy, and Sergey Perzhabinsky. "Adequacy analysis of electric power systems with wind and solar power stations." E3S Web of Conferences 58 (2018): 02019. http://dx.doi.org/10.1051/e3sconf/20185802019.

Full text

Abstract:

We developed a new method of adequacy analysis of electric power systems with wind and solar power stations. There are storage batteries in the electric power system. Various types of storage batteries can be used in electric power systems. They are electrochemical, hydroelectric, heat or air storages. The modelling of wind speed and solar radiation is based on software «Local analysis of environmental parameters and solar radiation». The original combination of modern models of meteorological data processing is used in the software. For adequacy analysis of electric power system, we use nonsingle estimation of electricity sacrifice in random hour. Simulation of random values is carried out by the Monte Carlo method.

APA, Harvard, Vancouver, ISO, and other styles

2

Yuan, Xiao Hua, and Xian Bin Dai. "Energy-Saving Analysis for Power System Reactive Power Compensation." Advanced Materials Research 608-609 (December 2012): 1151–55. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.1151.

Full text

Abstract:

The alternator output power in the power system can be divided into active and reactive power. The active power (in kW) is that part of the electrical energy for doing work and heat loss, such as the conversion of mechanical energy, heat, light. The reactive power (in kVar) is that part of the electrical energy for the exchange of electric and magnetic fields in the circuit, such as transformers, motors, through the magnetic field can be passed to convert electrical energy; transmission lines in cable systems and a variety of load reactance (inductance and capacitance), and consumption of reactive power. With the rapid development of power system to study how to reduce energy loss in the power system is a very meaningful. In this paper, The Shizuishan plant desulfurization project as an example, illustrates the shunt capacitor reactive power compensation of the power system energy saving.

APA, Harvard, Vancouver, ISO, and other styles

3

Gesell, Hendrik, Florian Wolters, and Martin Plohr. "System analysis of turbo-electric and hybrid-electric propulsion systems on a regional aircraft." Aeronautical Journal 123, no. 1268 (2019): 1602–17. http://dx.doi.org/10.1017/aer.2019.61.

Full text

Abstract:

ABSTRACTThe increasing environmental requirements in the air transport sector pose great challenges to the aviation industry and are key drivers for innovation. Besides various approaches for increasing the efficiency of conventional gas turbine engines, electric propulsion systems have moved into the focus of aviation research. The first electric concepts are already in service in general aviation. This study analyses the potentials of electric and turbo hybrid propulsion systems for commercial aviation. Its purpose is to compare various architectures of electrical powertrains with a conventional turboprop on a regional aircraft, similar to the ATR 72, on engine and flight mission levels. The considered architectures include a turbo-electric (power controlled and direct driven), hybrid-electric (serial and parallel) and a pure electric concept. Their system weights are determined using today’s technology assumptions. With the help of performance models and flight mission calculations the impact on fuel consumption, CO ${}_{2}$ emissions and aircraft performance is evaluated.

APA, Harvard, Vancouver, ISO, and other styles

4

Aminuddin, Jamrud, Mukhtar Effendi, Nurhayati Nurhayati, et al. "Numerical Analysis of Energy Converter for Wave Energy Power Generation-Pendulum System." International Journal of Renewable Energy Development 9, no. 2 (2020): 255–61. http://dx.doi.org/10.14710/ijred.9.2.255-261.

Full text

Abstract:

The wave energy power generation-pendulum system (WEPG-PS) is a four-wheeled instrument designed to convert wave power into electric energy. The first wheel is connected to the pendulum by a double freewheel, the second and third are ordinary wheels, while the fourth is a converter component that is axially connected to the electric generator. This design used the Euler-Lagrange formalism and Runge-Kutta method to examine an ideal dimension and determine the numerical solution of the equation of motion related to the rotation speed of the wheels. The result showed that the WEPG-PS' converter system rotated properly when its mass, length, and moment of inertia are 10 kg, 2.0 m, and 0.25 kgm2, respectively. This is in addition to when the radius of the first, second, third, and fourth wheels are 0.5, 0.4, 0.2, and 0.01 m, with inertia values of 0.005, 0.004, 0.003, and 0.1 kgm2. The converter system has the ability to rotate the fourth wheel, which acts as the handle of an electric generator at an angular frequency of approximately 500 - 600 rad/s. The converter system is optimally rotated when driven by a minimum force of 5 N and maximum friction of 0.05. Therefore, the system is used to generate electricity at an amplitude of 0.3 - 0.61 m, 220 V with 50 Hz. Besides, the lower rotation speed and frequency of the energy converter of the WEPG-PS (300 rad/s) and induction generator (50 Hz) were able to generate electric power of 7.5 kW. ©2020. CBIORE-IJRED. All rights reserved

APA, Harvard, Vancouver, ISO, and other styles

5

Urbaha, Margarita, Arnis Križus, and Deniss Kreisberg. "Ship Power System Analysis Based on Safety Aspects." Transport and Aerospace Engineering 4, no. 1 (2017): 96–105. http://dx.doi.org/10.1515/tae-2017-0012.

Full text

Abstract:

Abstract This article analyses the reasons for the reduction of insulating resistance, processes influencing them and isolation diagnostic methods. It provides a short description of electrical safety situation on ships with isolated neutral electrical power systems. It also covers the methods of protecting personnel from electric shock or preventing ignition or arching damage at the fault location with the help of fault current compensation. Principal fault current compensation circuit diagrams are analysed by using the minimum value and time of transient fault current as criteria.

APA, Harvard, Vancouver, ISO, and other styles

6

Kim, Youngmin, Kyung-Won Jeon, and Sang-Yong Jung. "Power Management System Simulator Modeling and Characteristics Analysis for Electric Propulsion Ship." Transactions of The Korean Institute of Electrical Engineers 64, no. 6 (2015): 878–84. http://dx.doi.org/10.5370/kiee.2015.64.6.878.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Yu, C. W., S. H. Zhang, L. Wang, and T. S. Chung. "Analysis of interruptible electric power in deregulated power systems." Electric Power Systems Research 77, no. 5-6 (2007): 637–45. http://dx.doi.org/10.1016/j.epsr.2006.06.002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Perzhabinsky, Sergey, and Valery Zorkaltsev. "Model for Power Shortage Estimation in Electric Power Systems." International Journal of Energy Optimization and Engineering 1, no. 4 (2012): 70–88. http://dx.doi.org/10.4018/ijeoe.2012100105.

Full text

Abstract:

This paper addresses the model for power shortage estimation in electric power systems. The model’s main component of methodology for analysis of electric power system (EPS) reliability that has been developed at the Energy Systems Institute, Siberian Branch of Russian Academy Sciences. The methodology is based on the Monte-Carlo method. Quality and implementation time of reliability analysis depend on realization of the model. The model is implemented in the computational software for electric power systems reliability analysis. The history of evolution of the model for power shortage estimation and mathematical properties of the model are discussed. The results of the state-of-the-art studies of the model for power shortage estimation in EPS are presented. The model for power shortage estimation in EPS with quadratic power losses in power lines is considered. Algorithms of the interior point method with quadratic approximations of constraints applied for realization of the model are discussed. Results of experimental studies of the algorithms are presented.

APA, Harvard, Vancouver, ISO, and other styles

9

Ryabykh, Igor V., and Sergei V. Podkovalnikov. "Analysis of the integration of Yakut isolated power system into the interconnected power system of Far East." E3S Web of Conferences 289 (2021): 04005. http://dx.doi.org/10.1051/e3sconf/202128904005.

Full text

Abstract:

This article considers overview of the integration process of the isolated power systems of Yakutia to the eastern section of the Unified Power System of Russia. Features of development of Yakutia’s electric power sector are considered. Systemic effects of connecting the isolated power systems of Yakutia to the IPS of Far East were identified. Changes in the electric power tariff setting were analysed. Information about improving of reliability of electricity supply was presented.

APA, Harvard, Vancouver, ISO, and other styles

10

Graña-López, M. A., A. García-Diez, A. Filgueira-Vizoso, J. Chouza-Gestoso, and A. Masdías-Bonome. "Study of the Sustainability of Electrical Power Systems: Analysis of the Causes that Generate Reactive Power." Sustainability 11, no. 24 (2019): 7202. http://dx.doi.org/10.3390/su11247202.

Full text

Abstract:

Reactive power is an important parameter in electrical power systems since it affects the efficiency of the system because it is not useful energy. It decreases the power factor of the system and limits the ability of generators to deliver useful power. It is therefore necessary to understand and correctly measure the phenomenon of reactive energy in three-phase systems. In this paper, we analyze reactive power in linear and unbalanced three-phase systems using the Unified Theory of Electrical Power and the Institute of Electrical and Electronics Engineers Standard 1459-2010 (IEEE Std. 1459-2010) to obtain expressions for reactive power in balanced and unbalanced systems and noting that there are terms that exist only for unbalanced systems. Analysis of the measurements carried out led us to identify the existence of two components of reactive power—that due to reactive elements, and that caused by unbalances in the system. Knowing the causes that generate reactive power, it is possible to act more effectively on the problem and therefore achieve a more sustainable generation of electric power and a lower environmental impact.

APA, Harvard, Vancouver, ISO, and other styles

11

Al-Khusaibi, T. M., K. A. Ellithy, and M. R. Irving. "State-of-the-Art Methods for Electric Power Systems Voltage Stability Analysis." Sultan Qaboos University Journal for Science [SQUJS] 5 (December 1, 2000): 247. http://dx.doi.org/10.24200/squjs.vol5iss0pp247-263.

Full text

Abstract:

This paper presents a literature survey on the subject of voltage stability analysis of power systems. The survey describes several published methods and techniques used to determine voltage stability indices. These indices predict proximity to voltage instability and collapse problems. The Q-V and P-V curves; singular value decomposition; modal analysis; test function; reduced determinant; loading margin by multiple power flow solutions; local load margins; thevenin/load impedance; and energy function are the methods which have been decribed in the paper. The methods described are based on the original work that first proposed them. They are based on the power-flow system model, where the variation of real and reactive powers are assumed to be the main parameters driving the system to voltage instability. Some of the described methods were applied on the IEEE 30-bus power system.

APA, Harvard, Vancouver, ISO, and other styles

12

Rahman, Mahbubur, Forest Atchison, and Valentina Cecchi. "Temperature-dependent system level analysis of electric power transmission systems: A review." Electric Power Systems Research 193 (April 2021): 107033. http://dx.doi.org/10.1016/j.epsr.2021.107033.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Diamenu, Godwin. "Statistical Analysis of Electric Power Distribution Grid Outages." European Journal of Engineering and Technology Research 6, no. 3 (2021): 27–33. http://dx.doi.org/10.24018/ejers.2021.6.3.2406.

Full text

Abstract:

Power systems in general supply consumers with electrical energy as economically and reliably as possible. Reliable electric power systems serve customer loads without interruptions in supply voltage. Electric power generation facilities must produce enough power to meet customer demand. Electrical energy produced and delivered to customers through generation, transmission and distribution systems, constitutes one of the largest consumers markets the world over. The benefits of electric power systems are integrated into the much faster modern life in such extent that it is impossible to imagine the society without the electrical energy. The rapid growth of electric power distribution grids over the past few decades has resulted in a large increment in the number of grid lines in operation and their total length. These grid lines are exposed to faults as a result of lightning, short circuits, faulty equipment, mis-operation, human errors, overload, and aging among others. A fault implies any abnormal condition which causes a reduction in the basic insulation strength between phase conductors or phase conductors and earth, or any earthed screens surrounding the conductors. In this paper, different types of faults that affected the electric power distribution grid of selected operational districts of Electricity Company of Ghana (ECG) in the Western region of Ghana was analyzed and the results presented. Outages due to bad weather and load shedding contributed significantly to the unplanned outages that occurred in the medium voltage (MV) distribution grid. Blown fuse and loose contact faults were the major contributor to unplanned outages in the low voltage (LV) electric power distribution grid.

APA, Harvard, Vancouver, ISO, and other styles

14

Dai, Wen Jin, and Xiang Jie Chen. "Analysis for TCSC in Single Phase Power System Simulation." Advanced Materials Research 179-180 (January 2011): 20–27. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.20.

Full text

Abstract:

This paper carries on the stable state simulation and transition condition simulation for the single phase power systems, which are without TCSC and with TCSC systems. Both without TCSC and with TCSC circuits in the single-phase power system, have been carried out a detailed steady state and transition condition simulation, and studied the influence for TCSC that on power system load voltage and load power. In addition, applies the TCSC conventional PID impedance control mode, with TCSC fuzzy PID impedance control in the electrical power system, contrasts their function that display in the electrical power system operation, and demonstrate the two controllers’ advantage and disadvantage. In the stable state simulation, establishes the systems operation separately in the two kind of situations that rated load and overload, observes the respective load voltage profile, and carries on the comparison with other, in order to study the function for TCSC that work s in the single phase power system normal operation time . In the transition condition simulation, establishment short trouble, views the system transition condition’s load voltage, makes its profile the comparison, and studies TCSC in the single phase power system transition condition function. At the same time, considered the difference for TCSC impedance control modes, as well each as the influence which produces to the TCSC performance characteristic, makes the TCSC conventional PID impedance control mode and TCSC fuzzy PID impedance control mode to apply in the single phase power system separately, and carries on the two's simulation profile in detail contrastive analysis . The simulation result indicated that TCSC has the tidal current control and the damping line power vibration, enhances the electrical power system transition condition stably many kinds of functions, in the stable state condition, TCSC can increase system's transportation power, and reduce the electric transmission loss; under the transition condition, TCSC can suppress the system power oscillation and enhance the system stability.

APA, Harvard, Vancouver, ISO, and other styles

15

Jenal, Norhisyam, Wahyu Kuntjoro, Thomas Arthur Ward, Khairul Imran Sainan, and Firdaus Mohamad. "Performance Analysis of Ground-Based Static Test for Hydrogen Fuelcell Propulsion System." Applied Mechanics and Materials 393 (September 2013): 510–15. http://dx.doi.org/10.4028/www.scientific.net/amm.393.510.

Full text

Abstract:

Combustion engines are increasingly being regarded as unsustainable in the long-term, because of their negative impact on the environment (e.g. pollution, green-house gas production, and global warming). This has generated worldwide interest in propulsion systems based on renewable alternative energy sources for the future. Fuel cell technology is a promising alternative power source because of their high specific energy, efficiency, and reliability. Hydrogen proton exchange membrane fuel cell (PEMFC) in particular produces zero carbon emissions by having only water vapor as the exhaust. Although there has been much research by automotive industries in developing fuel cell hybrid electric vehicles (FCHEV), fuel cell research for aircraft application is relatively new. Therefore, there is a pressing need for research related to development of aircraft fuel cell electric propulsion systems. Universiti Teknologi MARA (UiTM) is conducting static experiments on different configurations of fuel cell electric propulsion systems. The objective of this study is to understand the behavior of a PEMFC propulsion system under a ground-based static test. A 1 kW PEMFC was used as the main power source for a brushless DC motor electric propulsion system. The electrical characteristics, rotational speed, and thrust data were presented for two different electrical propellers. Analyses of the results were used to characterize the effectiveness of the fuel cell system and its balance of plant. The results were beneficial as a predictive method on defining the optimum electric propulsion system performance needed for future actual flight development.

APA, Harvard, Vancouver, ISO, and other styles

16

Ziganshin, Ayrat G., and Georgi M. Mikheev. "DIGITALIZATION OF THE ELECTRIC POWER METERING SYSTEM." Vestnik Chuvashskogo universiteta, no. 3 (September 25, 2020): 74–83. http://dx.doi.org/10.47026/1810-1909-2020-3-74-83.

Full text

Abstract:

The article deals with the issue of paying for electricity transmission services by consumers in connection with the introducing on the 1st of July, 2020 the Federal Law no. 522-FZ dated December 27, 2018 and the requirements for smart devices and electricity metering systems. This topic is one of the key points in the fight against non-payments for electrical energy, reducing business losses. The article draws attention to the change in the relationship between a consumer of electrical power and its supplier after the introduction of the above-mentioned law. The opportunities of intelligent electricity metering systems are examined as well as their features and some of their characteristics are given. On the example of the Verkhneuslonsky region of the Republic of Tatarstan, served by the branch of JSC “Network Company” Buinsky electrical networks, a comparative analysis of electrical power consumption is presented according to the data of those consumers who have smart metering devices installed and those who use ordinary counters. It is shown that installation of intelligent electric power metering systems made it possible to increase the useful power supply for the observed period by 15.5% in 2020 against 1.8% when using traditional counters for the same period of 2019.

APA, Harvard, Vancouver, ISO, and other styles

17

Sigitov, O. Yu, N. Sh Chemborisova, and I. D. Chernenkov. "Formalized reliability analysis during the electric power systems modes management." E3S Web of Conferences 216 (2020): 01008. http://dx.doi.org/10.1051/e3sconf/202021601008.

Full text

Abstract:

The current problem of the selection of the electric power system control nodes, which can be used to solve multicriterial problems of the consumers reliable supply with the electric power of the necessary quality of maximum efficiency is investigated. At the same time, a new method of making decisions while choosing electric power system control nodes is proposed. It is necessary to take into account a set of different types of indicators which characterize different properties of these nodes.

APA, Harvard, Vancouver, ISO, and other styles

18

Gagarinov, I. "Structures of high-power electric propulsion systems." Transactions of the Krylov State Research Centre 1, no. 395 (2021): 119–31. http://dx.doi.org/10.24937/2542-2324-2021-1-395-119-131.

Full text

Abstract:

Object and purpose of research. This paper discusses structures of high-power electric propulsion systems for ships. The purpose was to give a summary of design solutions made in development of these systems. Materials and methods. This paper relies on academic and technical data, as well on the long-term author’s experience in marine electric propulsion R&Ds. The solution suggested by the author is based on the comparative analysis of design solutions adopted in the development of structures for high-power marine electric power and propulsion systems. Main results. Summary on design solutions for high-power electric propulsion systems of such ships as icebreakers, oil tankers, LNGCs and cruise liners. Conclusion. Results obtained by author were used in the design of the electric propulsion system of the «Lider» nuclear icebreaker and further could be used in design of Arctic vessels.

APA, Harvard, Vancouver, ISO, and other styles

19

Overbye, Thomas J., James D. Weber, and Kollin J. Patten. "Analysis and visualization of market power in electric power systems." Decision Support Systems 30, no. 3 (2001): 229–41. http://dx.doi.org/10.1016/s0167-9236(00)00101-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Aizenberg, Natalia, and Sergey Perzhabinsky. "Generation adequacy of electric power systems in market price setting." E3S Web of Conferences 114 (2019): 03006. http://dx.doi.org/10.1051/e3sconf/201911403006.

Full text

Abstract:

We propose the new model of generation adequacy optimization. Optimization criterion is a maximum of social welfare. Social welfare consists of profits of generating companies, consumer surplus, costs for development and servicing of electrical grids. In the article we present a review of existed methods of adequacy level management in liberalized electric power systems. Optimization of adequacy level is based on analysis of variants of development of the electric power system. For adequacy analysis of the variants of development we multiple estimate the electricity shortage in random hours of the system work. Analysis of the system work in every random hour is realized in two stages. At first we define values of equilibrium electricity demand in every system node and equilibrium price of electricity according to Cournot model. We consider only electricity market in the model. At the next stage we simulate failures of power generating equipment and transmission lines. The electricity shortage in a current hour is estimated on the second stage. After a whole cycle of analysis, we compute reliability indexes and profits of generating companies. Profits of generating companies are depended on the reliability of the electricity supply. The simulations of random values are based on Monte Carlo method.

APA, Harvard, Vancouver, ISO, and other styles

21

Grigorieva, Natalia, Lubov Dobrovolska, Dmitry Sobchuk, Viktor Shabaykovych, and Mykola Romaniuk. "Performance efficiency analysis of electric power supply systems." Eastern-European Journal of Enterprise Technologies 1, no. 8 (85) (2017): 34–40. http://dx.doi.org/10.15587/1729-4061.2017.92290.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

WANG, C., and Y. ZHANG. "Fault Correspondence Analysis in Complex Electric Power Systems." Advances in Electrical and Computer Engineering 15, no. 1 (2015): 11–16. http://dx.doi.org/10.4316/aece.2015.01002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Trudnev, S. U., and A. A. Marchenko. "Quality analysis of the ship electric power systems." Bulletin оf Kamchatka State Technical University 115 (2015): 15–17. http://dx.doi.org/10.17217/2079-0333-2015-33-15-17.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Bose, A. "Electric Power Systems: Analysis and Control [Book Review]." IEEE Power and Energy Magazine 2, no. 1 (2004): 64–66. http://dx.doi.org/10.1109/mpae.2004.1263426.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Jun, He, and Li Jie. "Seismic reliability analysis of large electric power systems." Earthquake Engineering and Engineering Vibration 3, no. 1 (2004): 51–55. http://dx.doi.org/10.1007/bf02668850.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Majchrzak, Henryk, and Michał Kozioł. "Analysis of Various Options for Balancing Power Systems’ Peak Load." Energies 14, no. 2 (2021): 513. http://dx.doi.org/10.3390/en14020513.

Full text

Abstract:

The balancing of the power of the Polish Power System (KSE) is a key element in ensuring the safety of electric energy supplies to end users. This article presents an analysis of the power demand in power systems (PS), with emphasis on the typical power variability both in subsequent hours of the day and on particular days and in particular months each year. The methodology for calculating the costs of electric energy undelivered to the end users and the amount of these costs for KSE is presented. Different possibilities have been analyzed for balancing power systems’ peak load and assumptions have been formulated for calculating the amount of the related costs. On this basis, a comparative analysis has been made of the possibility to balance peak load using operators’ system services, trans-border connections, and various energy storage solutions. On the basis of the obtained results, optimal tools have been proposed for market-based influence from transmission and distribution system operators on energy market participants’ behaviors in order to ensure the power systems’ operating safety and continuous energy deliveries to end users.

APA, Harvard, Vancouver, ISO, and other styles

27

Akhmedova, Olga, and Anatoly Soshinov. "Analysis of Ice Melting System." Applied Mechanics and Materials 698 (December 2014): 710–15. http://dx.doi.org/10.4028/www.scientific.net/amm.698.710.

Full text

Abstract:

The problem of preventing icing accidents in electric networks of power systems is relevant in many regions of Russia. Disruptions of overhead lines, caused by intensive icing and icing and wind loads are most severe in their effects. However, the devastating effect of icing is not fatal. This is confirmed by the experience of power systems, systematically carrying on a struggle against ice. Prevention of icing accidents is based on the use of an integrated system of activities in a systematic manner.

APA, Harvard, Vancouver, ISO, and other styles

28

Kwon, YooJin, SangYoum Lee, Ralph King, Jong Lim, and Huy Kim. "Behavior Analysis and Anomaly Detection for a Digital Substation on Cyber-Physical System." Electronics 8, no. 3 (2019): 326. http://dx.doi.org/10.3390/electronics8030326.

Full text

Abstract:

The electric power system infrastructure has begun to adopt digital information technologies such as transmission control protocol/internet protocol (TCP/IP) and Ethernet infrastructures. With this adoption, information technology-centric network and system management (NSM) tools are used to manage the intermediate communication systems and electric devices in digital substations. However, the technology to monitor the cyber–physical System (CPS) statistics for the intelligent electronic devices (IEDs) and serial communication for a digital substation does not exist yet. In this paper, we aim to propose cyber-physical analysis methodologies of a digital substation system, concerning issues of (1) International Electrotechnical Commission (IEC) 62351-7 based network and system management, (2) behavior analysis of the CPS, (3) cyber–physical anomaly detection systems, and (4) a testbed for a digital substation. By collaborating with Electric Power Research Institute (EPRI), a cyber security testbed for the digital substation has been developed to implement the use cases and analyze potential security threats. Newly integrated methodologies for information handling are expected to lead to improved safety and reliability for the CPS of electric power grid systems.

APA, Harvard, Vancouver, ISO, and other styles

29

Mills, V. D., and J. R. Wagner. "Behavioural modelling and analysis of hybrid vehicle steering systems." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 217, no. 5 (2003): 349–61. http://dx.doi.org/10.1243/095440703321645061.

Full text

Abstract:

Hybrid vehicles integrate an internal combustion engine, electric motor with accompanying battery pack and generator, and potentially fuel cells to realize greater fuel economy and reduced emission levels. A variety of powertrain operating scenarios exist including engine with belt-driven generator, electric motor using battery pack and/or fuel cell and, finally, engine and electric motor. Automotive subsystems such as hydraulic power steering cannot be consistently powered by a conventional belt-driven hydraulic pump since the engine may be frequently turned off to conserve energy. Thus, a need exists to investigate the dynamic behaviour of various steering systems for hybrid vehicles in terms of platform steering characteristics and power consumption. In this paper, empirical and analytical mathematical models will be presented for power (e.g. hydraulic, electric and steer by wire) rack and pinion steering units. The influence of chassis, tyre-road interface and steering system non-linearities are introduced. Representative numerical results will be presented and discussed to investigate a vehicle's transient response for each steering system configuration.

APA, Harvard, Vancouver, ISO, and other styles

30

Hu, Jian Bo, Fei Li, Jun Wu, Jian Hao Wang, and Li Peng Zhang. "Research on Aviation Electric Power Cyber Physical Systems." Advanced Materials Research 846-847 (November 2013): 126–33. http://dx.doi.org/10.4028/www.scientific.net/amr.846-847.126.

Full text

Abstract:

More Electric Aircraft (MEA), which is the developing trend of the next generation of aircraft, put forward high demands on the electric power system. Cyber-Physical Systems (CPS) are a kind of novel intelligent systems with computation resources and controlled physical objects tightly integrated and interacted in the future network environment. CPS have the characteristics of real-time, synchronous, security, efficient and autonomous. This paper first elaborates the notion, characteristics, operation mechanism and technical challenges of CPS. The strategy of CPS-based next aviation electric power systems is presented. Then, the architecture of aviation electric power cyber physical systems is established. Finally, key technologies of aviation electric power cyber physical systems, including data bus, control strategies, energy management, security analysis, modeling and simulation, standardized and so on, are discussed. And directions are pointed out to offer a reference for the application of CPS in aviation electric power systems.

APA, Harvard, Vancouver, ISO, and other styles

31

Verdejo, Humberto, Pablo Moreira, Wolfgang Kliemann, Cristhian Becker, and José Delpiano. "An Analytical Model for Small Signal Stability Analysis in Unbalanced Electrical Power Systems." Applied Sciences 10, no. 24 (2020): 8855. http://dx.doi.org/10.3390/app10248855.

Full text

Abstract:

This paper presents a general model to carry out a small signal stability analysis in electrical power systems (EPSs) that operate in unbalanced conditions. The classic traditional approach is based on a phase representation where it is supposed that the triphasic electric grid does not suffer any variations during its operation. With the presence of unbalances in transmission lines and loads, it is necessary to develop a general model that allows answering the needs and challenges with which modern electric systems must deal. The present work firstly intends to address the three-phase representation of an EPS, including the controllers. The proposed model is applied to a classical test system, a three machine-nine bus system, considering all the dynamic and algebraic variations associated with angular stability analysis. The proposed approach to small signal stability analysis shows results that differ from the classical analysis. The results are backed up with time domain simulations, and therefore, these results could be used in the calculation of the controllers that operate in unbalanced multimachine systems.

APA, Harvard, Vancouver, ISO, and other styles

32

Bitimanova, Saltanat Serikbaevna, and Asel Asylbekovna Abdildaeva. "Algorithm for optimal control of electric power systems." Bulletin of Toraighyrov University. Energetics series, no. 4.2020 (December 17, 2020): 78–91. http://dx.doi.org/10.48081/wddo6475.

Full text

Abstract:

This paper provides information about the current state of the energy system in Kazakhstan. Also, analyzing the technical condition of the structure of the Kazakhstan electro power station, a mathematical model for complex power systems is developed. Algorithms of control with Adams-Bashforth multistep method are developed. There has been conducted the analysis and assessment of significant factors affecting the forecasted dynamics of electric power consumption, built based on multivariate regression and cointegration models.

APA, Harvard, Vancouver, ISO, and other styles

33

Alkhanafseh, Yousef Marwan, and Tahir Cetin Akinci. "A Python-Based Interface Design for Electric Power System Education." International Journal of Smart Grid and Sustainable Energy Technologies 4, no. 1 (2021): 163–68. http://dx.doi.org/10.36040/ijsgset.v4i1.3905.

Full text

Abstract:

Python, which is widely used today, is one of the open-source programming languages. In the Python program, its interface is done through the PyQt5 library. With PyQt5, it is possible to develop object-based software that takes up less space on the disk and runs faster. In this study, an educational calculation and analysis program (ITUPSA) was designed for the Electric power systems course using the Python interface. Electric power systems are one of the fundamental courses in electrical engineering. This main course is taught in three sub-course groups as energy transmission-distribution, energy flow and energy economy. The energy transmission-distribution course package constitutes the first and most comprehensive part of the electric power systems group. In the energy transmission-distribution, the creation of the transmission line model and the calculation of the line parameters form an important part of the training. This section contains very detailed mathematical calculations and it is very important that students get the correct result as a result of these calculations. This can be possible with a lot of practice. The interface design was made by students and faculty to teach practical examples correctly. This developed (ITUPSA) python-based interface program is very suitable for calculation and analysis exercises in both undergraduate and graduate courses in the Electrical Engineering department. The purpose of this study is to create a python-based interface in order to solve the problems related to these lines, to make the types of short, medium and long power transmission lines correct and understandable. In the study, after selecting the type of energy transmission line and all parameters related to the line, the necessary mathematical analysis can be made and also the analysis results can be plotted. The analysis program is available in two languages, English and Turkish.

APA, Harvard, Vancouver, ISO, and other styles

34

Grabchuk, B. L., and Yu F. Romaniuk. "ANALYSIS OF ENERGY FLOWS IN POWER SUPPLY SYSTEMS WITH NON-LINEAR LOAD." METHODS AND DEVICES OF QUALITY CONTROL, no. 1(42) (June 27, 2019): 56–64. http://dx.doi.org/10.31471/1993-9981-2019-1(42)-56-64.

Full text

Abstract:

The problem of the non-sinusoidal modes analysis of the power supply system with non-linear elements and their influence on the efficiency of the power transmission are considered. It is carried out numerical analysis of electric energy flows for three phase power supply system with sinusoidal electromotive force source, linear active load and non-linear elements (diodes). Power transfer is considered as distribution of the primary power flow from source. The part of this flow is converted by non-linear elements and return into the network like secondary power stream of zero sequence and high harmonics which is consumed by resistance elements and causes additional power losses. As a result transporting efficiency and power factor are reduced and energy quality becomes worse. In order to improve the quality of electricity, it is proposed to normalize the relative value of the reactive power of distortion for non-linear electric collectors and to oblige manufacturers of electrical products to complete them with filters of higher harmonics. With the purpose of correct selection of the type and power of compensating devices and monitoring the parameters of the electric network mode, it is proposed to expand the functionality of electronic meters by dividing the reactive power into two components - shear power and distortion power, and for the objective analysis of energy flows, it is proposed to standardize the reactive power of distortion. It is shown that in such system current in neutral line increases due to overlaying of zero sequence harmonics currents. This should be taking into account during neutral line cross-section choice and power losses calculation.

APA, Harvard, Vancouver, ISO, and other styles

35

Xiao, Qin. "On-Line Power System Analysis Based on Hybrid Network Model." Applied Mechanics and Materials 484-485 (January 2014): 665–70. http://dx.doi.org/10.4028/www.scientific.net/amm.484-485.665.

Full text

Abstract:

Online power system analysis to electric mode-based on information that will offer a decided in real time the quality of the studies and efficiency of the power system operation precision closely associated with the power system model. Accurate and quick decision based on real-time data analysis needs battle plan deregulation of the power system in all over the world. In addition a significant expansion of electric power system in India in recent times, especially in the 2003 introduction of electricity bill, introduction of open access, electric power market, the appearance of communication through power with complex power system operation and control. Electric power network analysis in real-time data is expected to further improve the critical role of power network operation to repair the proposed law after transmission loss of tariff and share. All this forced the power system real time is accurate, but conditions analysis based on different principles. In order to meet the requirements of all, from the monitoring, commercial, reliability and stability of the Angle, attempt to have been forced to take hybrid network model in natural real-time supervisory control and data acquisition (SCADA) systems work so far a single network model of the integrated. This paper presents a network model for the theory foundation and the same is in the southern area rapidly adapt to load center (SRLDC) Bangalore and utilization of energy management system in India (EMS) real-time systems and tools. It is proved to be how to planning can online network system modeling and analysis of relatively simple in complex operational requirements. The experimental results show that the online power management strategy to adapt to can be a key tool control engineers hand in complex power system operation situations.

APA, Harvard, Vancouver, ISO, and other styles

36

Ajiatmo, Dwi, Imam Robandi, Machrus Ali, and Betta Aidya Suroya. "Analisis Gangguan Pada Sistem Tenaga Listrik Jawa Bali 500 kV Menggunakan Power World Simulator." Jurnal Intake : Jurnal Penelitian Ilmu Teknik dan Terapan 10, no. 1 (2019): 35–41. http://dx.doi.org/10.32492/jintake.v10i1.793.

Full text

Abstract:

Short circuit is one type of interference that often occurs in electric power systems. The interference if it lasts a long time will affect the quality and continity of electrical power distribution as well as the reliability and safety of the equipment on the system. To minimize the possibility of interference and to minimize the consequences caused by interference, an analysis of disturbances in the electric power system is needed. This study discusses the classification and analysis of disturbances in the electric power system. The type of interference in the electric power system is classified into two, namely symmetry and non-symmetrical interference. Symmetry disturbances are three phase disturbances which are described by the equation of the sequence of the symmetry component system. Sequence equations from the symmetry component system are positive sequence equations, negative sequence equations, and zero sequence equations. Non-symmetrical interference is a disorder that often occurs in electric power systems, namely the interference of one network to the ground, network interference to the network and interference of two networks to the ground. This research is to classify and to analyze the types of disturbances in the Java-Bali electric power system 500 kV 20 buses in the form of a single line diagram, using Power World Simulator and ETAP Software applications. The simulation results are calculated and display the simulation design of the power system with the tools contained in the program.

APA, Harvard, Vancouver, ISO, and other styles

37

Dwi Ajiatmo, Imam Robandi, and Machrus Ali. "Analisis Gangguan Pada Sistem Tenaga Listrik Jawa Bali 500 kV Menggunakan Power World Simulator." Jurnal Intake : Jurnal Penelitian Ilmu Teknik dan Terapan 10, no. 1 (2019): 35–41. http://dx.doi.org/10.48056/jintake.v10i1.50.

Full text

Abstract:

Short circuit is one type of interference that often occurs in electric power systems. The interference if it lasts a long time will affect the quality and continity of electrical power distribution as well as the reliability and safety of the equipment on the system. To minimize the possibility of interference and to minimize the consequences caused by interference, an analysis of disturbances in the electric power system is needed. This study discusses the classification and analysis of disturbances in the electric power system. The type of interference in the electric power system is classified into two, namely symmetry and non-symmetrical interference. Symmetry disturbances are three phase disturbances which are described by the equation of the sequence of the symmetry component system. Sequence equations from the symmetry component system are positive sequence equations, negative sequence equations, and zero sequence equations. Non-symmetrical interference is a disorder that often occurs in electric power systems, namely the interference of one network to the ground, network interference to the network and interference of two networks to the ground. This research is to classify and to analyze the types of disturbances in the Java-Bali electric power system 500 kV 20 buses in the form of a single line diagram, using Power World Simulator and ETAP Software applications. The simulation results are calculated and display the simulation design of the power system with the tools contained in the program.

APA, Harvard, Vancouver, ISO, and other styles

38

Subrahmanyam, J. B. V., P. Alluvada, Bandana, K. Bhanupriya, and C. Shashidhar. "Renewable Energy Systems: Development and Perspectives of a Hybrid Solar-Wind System." Engineering, Technology & Applied Science Research 2, no. 1 (2012): 177–81. http://dx.doi.org/10.48084/etasr.104.

Full text

Abstract:

Considering the intermittent natural energy resources and the seasonal un-balance, a phtovoltaic-wind hybrid electrical power supply system was developed to accommodate remote locations where a conventional grid connection is inconvenient or expensive. However, the hybrid system can also be applied with grid connection and owners are allowed to sell excessive power back to the electric utility. The proposed set-up consists of a photo-voltaic solar-cell array, a mast mounted wind generator, lead-acid storage batteries, an inverter unit to convert DC to AC, electrical lighting loads, electrical heating loads, several fuse and junction boxes and associated wiring, and test instruments for measuring voltages, currents, power factors, and harmonic contamination data throughout the system. The proposed hybrid solar-wind power generating system can be extensively used to illustrate electrical concepts in hands-on laboratories and also for demonstrations in the Industrial Technology curriculum. This paper describes an analysis of local PV-wind hybrid systems for supplying electricity to a private house, farmhouse or small company with electrical power depending on the site needs. The major system components, work principle and specific working condition are presented.

APA, Harvard, Vancouver, ISO, and other styles

39

Vannoni, Alberto, Alessandro Sorce, Alberto Traverso, and Aristide Fausto Massardo. "Techno-Economic Analysis of Power-to-Heat Systems." E3S Web of Conferences 238 (2021): 03003. http://dx.doi.org/10.1051/e3sconf/202123803003.

Full text

Abstract:

The heating and cooling sector, responsible for a large fraction of greenhouse emissions, may have a large scale impact on the energy system evolution contributing to smart industrial and domestic electrification; at the same time the recent increase of renewable energy sources installation, posing a threat in terms of grid stability, makes available a considerable amount of clean and cheap electrical energy during peak hours production. Power to heat technologies constitute a promising solution to face both these issues reducing the electric demand variability and decarbonizing the heat production. Large vapor compression heat pumps are a reliable technology able to compete, under the economic point of view, with the heat-only-boilers in order to serve district heating networks. Performance and economic profitability of a compression cycle is strongly dependent on available thermal source and the temperature of water delivered to the network. The present work explores and compares performance and economic indicators under different installation conditions, considering compression heat pumps employing four different fluids: a traditional HCF (R134a) and three natural fluids, ammonia (R717), butane (R600), and propane (R290), often preferred nowadays to HCFs due to the lower global warming potential.

APA, Harvard, Vancouver, ISO, and other styles

40

Tsekouras, George J., Fotios D. Kanellos, and Michalis Kontosoros. "Sensitivity Analysis of Optimal Power Dispatch for All-Electric Ship." WSEAS TRANSACTIONS ON POWER SYSTEMS 16 (March 16, 2021): 22–40. http://dx.doi.org/10.37394/232016.2021.16.3.

Full text

Abstract:

Shipping industry is reforming and changing fast, as the International Maritime Organization (IMO) works towards air pollution prevention and ship-owners pursue more efficient operation of their ships. Formerly, propulsion and electric load dispatch in ship power system is implemented proportionally with respect to nominal power of prime movers and generators respectively. Additionally, integrated full electric propulsion, optimal real-time dispatch to ship generators and the integration of new systems, such as energy storage systems, shaft generators etc. could have gained a wider application. In this paper the optimal dispatch for ship power system based on Lagrange method is presented comparing the classic and all-electric ship design. The developed method is applied to an ten years old Ro-Ro (roll on / roll off) passenger ship and an analytical sensitivity analysis is occurred out with respect not only to technical characteristics of the ship, such as fuel kind, propulsion chain factors, but also voyage characteristics, such as ship speed, route length etc.

APA, Harvard, Vancouver, ISO, and other styles

41

Kazanov, S. "On electric power generation issues in ship electric propulsion systems." Transactions of the Krylov State Research Centre 3, no. 397 (2021): 83–91. http://dx.doi.org/10.24937/2542-2324-2021-3-397-83-91.

Full text

Abstract:

Object and purpose of research. The object and purpose of this study is generation of electric power for electric propulsion of ship and vessels; methods and problems, state-of-the-art and trend analysis are presented. Materials and methods. The main principles and methods of electric power generation using various generating and power conversion systems are briefly discussed. Their advantages and disadvantages are identified based on publication in this field. Main results. Achievements in the modern methods of power generation for ships, as well as ways of its transformation are highlighted. A detailed analysis of the state-of-the-art and trends in ship electric power generation is given. Various options of engines and generators are considered, including advanced types. Their characteristics are thoroughly analyzed based on the international publications. Conclusion. Conclusions are formulated regarding achievements and current problems in ship electric power generation systems.

APA, Harvard, Vancouver, ISO, and other styles

42

Saleh, Mahmoud, Yusef Esa, and Ahmed Mohamed. "Applications of Complex Network Analysis in Electric Power Systems." Energies 11, no. 6 (2018): 1381. http://dx.doi.org/10.3390/en11061381.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Raximovich, Allaev Kaxramon, and Makhmudov Tokhir Farkhadovich. "Analysis of Small Oscillations in Complex Electric Power Systems." Engineering 10, no. 05 (2018): 253–61. http://dx.doi.org/10.4236/eng.2018.105017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Ethmane, I. A., M. Maaroufi, A. K. Mahmoud, and A. Yahfdhou. "Optimization for Electric Power Load Forecast." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 5 (2018): 3453. http://dx.doi.org/10.11591/ijece.v8i5.pp3453-3462.

Full text

Abstract:

Load flow studies are one of the most important aspects of power system planning and operation. The main information obtained from this study comprises the magnitudes and phase angles of load bus voltages, reactive powers at generators buses, real and reactive power flow on transmission lines, other variables being known. To solve the problem of load flow, we use the iterative method, of Newton-Raphson. Analysis of the found results using numerical method programmed on the Matlab software and PSS/E Simulator lead us to seek means of controlling the reactive powers and the bus voltages of the Nouakchott power grid in 2030 year. In our case, we projected the demand forecast at 2015 to 2030 years. To solve the growing demand we injected the power plants in the system firstly and secondly when the production and energy demand are difficult to match due to lack of energy infrastructures in 2030.It is proposed to install a FACTS (Flexible Alternative Current Transmission Systems) system at these buses to compensate or provide reactive power in order to maintain a better voltage profile and transmit more power to customers.

APA, Harvard, Vancouver, ISO, and other styles

45

Sucita, T., and Y. Mulyadi. "Contingency Analysis of Electric Power Systems Sub-System 150 KV West Java Area II." IOP Conference Series: Materials Science and Engineering 180 (March 2017): 012290. http://dx.doi.org/10.1088/1757-899x/180/1/012290.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Obukhov, S. G., G. N. Klimova, and A. Ibrahim. "Methodology of optimum unit commitment of energy systems with renewable energy sources." Vestnik IGEU, no. 6 (December 28, 2020): 25–38. http://dx.doi.org/10.17588/2072-2672.2020.6.025-038.

Full text

Abstract:

One of the promising ways to improve the reliability and efficiency of power supply for customers in the areas remote from central electrical grid is the use of hybrid power systems with renewable energy sources. The primary task of designing such systems is the unit commitment of the generating equipment that provides the optimal technical and economic indexes of the electric power system. The stochastic nature of generation and nonlinearity of the characteristics of power plants cause a high complexity of solving this problem, which, from a mathematical point of view, is formulated as an optimization problem. An accurate and reliable solution of this optimization problem increases the efficiency of design and operation of hybrid electric power systems with renewable energy sources. And it is a vital task of modern power industry. A probabilistic-statistical methods and models for the analysis of experimental data are used to construct climatic time series and graphs of electrical loads. In addition, to study the operating modes of the electric power system the MatLab system is used for the simulation and modeling, and an evolutionary particle swarm algorithm is used to solve the optimization problem. The original model of solar radiation is used as a part of this methodology. This model provides forecasting the key characteristics of solar radiation in any geographical point of Russia including the areas that have no results of routine actinometric observation. Weibull distribution function is used to forecast daily variations of wind speed. It enhances the validity of forecasting of electricity generation of wind-driven power plant at daily time interval. As a result of the research, a method of optimum unit commitment has been developed for the equipment of electric power systems based on renewable energy sources. The use of the particle swarm algorithm as a part of the methodology provides reliable and accurate determination of the extremum of the objective function, which increases the efficiency of design and operation of hybrid electric power systems with renewable energy sources. The method has been tested on practical examples of optimum unit commitment for the equipment of electric power systems of various configurations and has proven its effectiveness. The technique is implemented as a software application, which ensures the convenience of its practical application. The obtained results can be used by companies involved in the design and operation of electric power systems using renewable energy generating units.

APA, Harvard, Vancouver, ISO, and other styles

47

Valery, Stennikov, and Golovshchikov Vladimir. "Systems analysis of reform in Russia’s energy industry." E3S Web of Conferences 289 (2021): 01019. http://dx.doi.org/10.1051/e3sconf/202128901019.

Full text

Abstract:

The paper presents the results of a systems analysis of the reform of Russia’s electric power industry. The analysis has revealed the main problems of the industry and the causes behind them. It has also shown that many of the negative outcomes of the reform are due to the lack of a systems approach to the formulation of the reform goals and objectives and the assessment of their implementation consequences. The lack of a systems approach to crucial problems of the electric power industry in the context of the actual situation and the lack of reasonable development forecasts have led to directive management methods. This significantly reduces the efficiency of the development of the electric power industry in Russia in the medium and long term. The analysis allowed us to propose some priority measures that will not require fundamental changes in the electric power industry but can improve the situation in the medium term.

APA, Harvard, Vancouver, ISO, and other styles

48

Japikse, David, and Francis A. Di Bella. "An Analysis of an Advanced Compressed Air Energy System (CAES) Using Turbomachinery for Energy Storage and Recovery and for Continuous On-Site Power Augmentation as an Air Brayton Cycle." Mechanics and Mechanical Engineering 22, no. 2 (2020): 479–94. http://dx.doi.org/10.2478/mme-2018-0039.

Full text

Abstract:

AbstractA thermodynamic analysis of an advanced CAES for Distributed Power Generation (DPG) is presented that utilizes turbomachinery for energy recovery, but also gives continuous power generation to augment on-site power. The advanced CAES uses renewable energy such as wind power and solar PV in the power range of 1500 to 2500 kW plus recuperation of waste heat from the existing on-site prime mover to improve the utility of the energy storage system. The proposed system also utilizes battery storage to maintain high energy density storage, preferably without the need for costly electrical rectifying and inversion systems to improve the stabilization of power generation. This proposed system may be thought of as a “cross-over” system that combines CAES technology with electric battery storage technology, particularly if the stored electric power is used directly as D.C. power at an industrial facility. The direct use of stored energy from a battery as heat input to the proposed “cross-over” system also may be considered in some limited applications. The ideal application of the proposed system is for isolated DPG systems perhaps in remote sites utilizing “power islands” of renewable energy augmented with on-site fossil fuel prime mover, power generation systems. The proposed “cross-over” system enables higher reliability, faster response to transient power loads, and the efficient use of renewable energy, as well as heat recovery from conventional prime mover systems that are on site.

APA, Harvard, Vancouver, ISO, and other styles

49

Hsieh, Long-Chang, and Tzu-Hsia Chen. "THE INNOVATIVE DESIGN OF AUTOMATIC OPENING/CLOSING GULL-WING FRAME SYSTEM BY MORPHOLOGICAL CHART ANALYSIS." Transactions of the Canadian Society for Mechanical Engineering 41, no. 5 (2017): 657–68. http://dx.doi.org/10.1139/tcsme-2017-501.

Full text

Abstract:

Gullwing vehicles, also known as "mobile stores", although belong to transportation but also belong to product marketing industry. In this paper, we focus on innovative design of opening/closing gull-wing frame system to reduce the manufacturing costs and enhance mechanical precision. By using the morphological chart analysis, many new gull-wing frames are generated. One of these designs is “Automatic opening/closing gull-wing frame with four electric power systems”. Based on the design requirements and constraints of opening/closing gull-wing frame, the driving mechanism and power system are synthesized. Finally, the prototype “automatic opening/closing gull-wing frame with four electric power systems” is carried out.

APA, Harvard, Vancouver, ISO, and other styles

50

Naumov, I. V., D. N. Karamov, A. N. Tretyakov, M. A. Yakupova, and E. S. Fedorinovа. "Study of power transformer loading in rural power supply systems." Safety and Reliability of Power Industry 13, no. 4 (2021): 282–89. http://dx.doi.org/10.24223/1999-5555-2020-13-4-282-289.

Full text

Abstract:

The purpose of this study is to study the effect of loading power transformers (PT) in their continuous use on their energy efficiency on a real-life example of existing rural electric networks. It is noted that the vast majority of PT in rural areas have a very low load factor, which leads to an increase in specific losses of electric energy when this is transmitted to various consumers. It is planned to optimize the existing synchronized power supply systems in rural areas by creating new power supply projects in such a way as to integrate existing power sources and ensure the most efficient loading of power transformers for the subsequent transfer of these systems to isolated ones that receive power from distributed generation facilities. As an example, we use data from an electric grid company on loading power transformers in one of the districts of the Irkutsk region. Issues related to the determination of electric energy losses in rural PT at different numerical values of their load factors are considered. A computing device was developed using modern programming tools in the MATLAB system, which has been used to calculate and plot the dependence of power losses in transformers of various capacities on the actual and recommended load factors, as well as the dependence of specific losses during the transit of 1 kVA of power through a power transformer at the actual, recommended and optimal load factors. The analysis of specific losses of electric energy at the actual, recommended and optimal load factors of PT is made. Based on the analysis, the intervals of optimal load factors for different rated power of PT of rural distribution electric networks are proposed. It is noted that to increase the energy efficiency of PT, it is necessary to reduce idling losses by increasing the load of these transformers, which can be achieved by reducing the number of transformers while changing the configuration of 0.38 kV distribution networks.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Electric power systems. System analysis'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles