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Letteratura scientifica selezionata sul tema "LOAD DISPATCH"

Autore: Grafiati

Pubblicato: 11 settembre 2023

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Articoli di riviste sul tema "LOAD DISPATCH"

Lamba, Prof Kanika. "Economic Load Dispatch". International Journal for Research in Applied Science and Engineering Technology 9, n. VI (20 giugno 2021): 1646–51. http://dx.doi.org/10.22214/ijraset.2021.35330.

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Abstract (sommario):

ELD or Economic load dispatch is an online process of allocating generating among the available generating units to minimize the total generating cost and satisfy the equality and inequality constraint. ELD means the real and reactive power of the generator vary within the certain limits and fulfils theload demand with less fuel cost. There are some traditional methods for = 1; 2; :::;N) isgiven as Vi=[Vi;1; Vi;2; :::; Vi;D]. The index ivaries from solving ELD include lambda irritation method, Newton-Raphson method, Gradient method, etc. All these traditional algorithms need the incremental fuel cost curves of the generators to be increasing monotonically or piece-wise linear. But in practice the input-output characteristics of a generator are highly non-linear leading to a challenging non-convex optimization problem. Methods like artificial intelligence, DP (dynamic programming), GA (genetic algorithms), and PSO (particle swarm optimization), ALO ( ant-lion optimization), solve non convex optimization problems in an efficient manner and obtain a fast and near global and optimum solution. In this project ELD problem has been solved using Lambda-Iterative technique, ALO (ant-lion Optimization) and PSO (Particle Swarm Optimization) and the results have been compared. All the analyses have been made in MATLAB environment

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Sha, Quan, e Shao Hua Zhang. "Application of Intelligent Algorithms to Interruptible Load Dispatch Model". Applied Mechanics and Materials 239-240 (dicembre 2012): 1487–92. http://dx.doi.org/10.4028/www.scientific.net/amm.239-240.1487.

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Interruptible load management plays an important role in maintaining the reliability and security of power systems and reducing price spike of power markets, thus has been widely used in power systems. Interruptible loads dispatch problem with multi-period and multi-interruptible-load is usually a multi-objective, combinatorial optimization problem, and its solution method needs to be carefully investigated. Application of intelligent optimization algorithms to the multi-period interruptible load dispatch problem is discussed in this paper. Multi objectives, such as minimizing the interruption payments and interruption frequency, can be included in the proposed interruptible load dispatch model. The characteristics of different interruptible loads are also considered. Numerical simulations using discrete binary particle swarm optimization (BPSO) and the genetic algorithm (GA) show that the BPSO can obtain better solutions than that of the GA. Thus the BPSO presents better potentials in solving the interruptible load dispatch problem.

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Jan, Zaineb Nisar, e Dr Satish Saini. "Economic Load Dispatch Using Computational Techniques". International Journal for Research in Applied Science and Engineering Technology 10, n. 12 (31 dicembre 2022): 831–34. http://dx.doi.org/10.22214/ijraset.2022.47977.

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Abstract: This research paper introduces the importance of economic dispatch in a power system. Economic dispatch was the method used in allocating the output power of each generator to achieve the optimal dispatch to reduce fuel cost to the minimum. The research paper discusses how the economic dispatch problem can be solved by using the methods of Particle Swarm Optimization (PSO) and Lambda Iteration (LI). These methods were applied in IEEE-30 busses systems. The system was tested on a few loads demands to find out the total fuel cost, power losses, and computational time.

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Yang, Yang, e Li Zi Zhang. "The Combined Generation-Consumption Scheduling Mode Considering Price-Responsive and Interruptible Loads". Applied Mechanics and Materials 448-453 (ottobre 2013): 2740–46. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.2740.

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In order to provide reserve power supply, consumption dispatch can be integrated into the conventional generation dispatch model. This serves as a feasible approach in connecting intermittent power sources such as hydropower into the power grid. An integrated generation-consumption dispatch model with hydropower is presented considering the consumption dispatch mode, such as consumption stimulation, interruptible load management, and price response, etc. Practical case studies show that price-responsive loads and interruptible loads tend to exert great influence on the load distribution which lead to a reallocation of generation among thermal generation units, run-of-river and storage hydropower generation units, which favours the total reservoir storage of the system so that the overall system operational economy can be improved.

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Xu, Tao, Cheng Cheng, Fei Ren e Weiwei Zhang. "Optimal Scheduling of Integrated Energy Systems Considering Carbon Trading". Journal of Physics: Conference Series 2395, n. 1 (1 dicembre 2022): 012053. http://dx.doi.org/10.1088/1742-6596/2395/1/012053.

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Abstract Under the background where the electricity market and the carbon market are booming, the operation and dispatch of the integrated energy system requires the introduction of a carbon trading mechanism that can help guide customers and system operators to optimize electricity consumption and dispatch plans. A mathematical model of the community-integrated energy system, including energy storage, gas turbine generation system, and flexible load, is constructed based on energy hubs. In the consideration of costs in operation and carbon trading of the system, a low carbon economic dispatch model is established for IES to achieve the optimization objective of minimizing the total cost. The simulation results show that the coupled electric and thermal dispatch and the participation and interaction of flexible electric and thermal loads can lower the load peak-to-valley difference and significantly reduce the system operation cost, and the flexible load participation and dispatch under the carbon trading system can effectively bring the system more environmental and economic benefits.

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Dhillon, J. S., S. C. Parti e D. P. Kothari. "Stochastic economic emission load dispatch". Electric Power Systems Research 26, n. 3 (aprile 1993): 179–86. http://dx.doi.org/10.1016/0378-7796(93)90011-3.

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Vyas, Sanjay R., e Dr Ved vyas dwivedi. "Reduce Power Generation Cost by Using Load Dispatch Schedule". Indian Journal of Applied Research 2, n. 2 (1 ottobre 2011): 66–68. http://dx.doi.org/10.15373/2249555x/nov2012/24.

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Li, Lianming, Defeng He, Jianrong Jin, Baoyun Yu e Xiang Gao. "Multi-Objective Load Dispatch Control of Biomass Heat and Power Cogeneration Based on Economic Model Predictive Control". Energies 14, n. 3 (1 febbraio 2021): 762. http://dx.doi.org/10.3390/en14030762.

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This paper proposes a multi-objective load dispatch algorithm based on economic predictive control to solve the real-time multi-objective load dispatch problem of biomass heat and power cogeneration. According to the energy conservation law and production process, a real-time multi-objective load dispatch optimization model for heat and power units is established. Then, the concept of multi-objective utopia points is introduced, and the multi-objective load comprehensive objective function is defined to coordinate the conflict between the economic performance and pollutant emission performance of the units. Furthermore, using the online receding optimization characteristics of economic predictive control, the comprehensive objective function of multi-objective load dispatching is optimized online. Then, the fuel rate satisfying the economic performance and pollutant emission performance of the units is calculated to realize the economic performance and environmental protection operation of biomass heat and power cogeneration. Finally, the proposed multi-objective load dispatch control method is compared to traditional dispatch strategies by using industrial data. The results show that the method presented here can well balance the production cost and pollutant emission objective under the fluctuation of the thermoelectric load demand, and provides a feasible scheme for real-time dispatching of the multi-objective load dispatch problem of biomass heat and power cogeneration.

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Singh, Nagendra, Tulika Chakrabarti, Prasun Chakrabarti, Martin Margala, Amit Gupta, S. Phani Praveen, Sivaneasan Bala Krishnan e Bhuvan Unhelkar. "Novel Heuristic Optimization Technique to Solve Economic Load Dispatch and Economic Emission Load Dispatch Problems". Electronics 12, n. 13 (3 luglio 2023): 2921. http://dx.doi.org/10.3390/electronics12132921.

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Abstract (sommario):

The fundamental objective of economic load dispatch is to operate the available generating units such that the needed load demand satisfies the lowest generation cost and also complies with the various constraints. With proper power system operation planning using optimized generation limits, it is possible to reduce the cost of power generation. To fulfill the needs of such objectives, proper planning and economic load dispatch can help to plan the operation of the electrical power system. To optimize the economic load dispatch problems, various classical and new evolutionary optimization approaches have been used in research articles. Classical optimization techniques are outdated due to many limitations and are also unable to provide a global solution to the ELD problem. This work uses a new variant of particle swarm optimization techniques called modified particle swarm optimization, which is effective and efficient at finding optimum solutions for single as well as multi-objective economic load dispatch problems. The proposed MPSO is used to solve single and multi-objective problems. This work considers constraints like power balance and power generation limits. The proposed techniques are tested for three different case studies of ELD and EELD problems. (1) The first case is tested using the data of 13 generating unit systems along with the valve point loading effect; (2) the second case is tested using 15 generating unit systems along with the ramp rate limits; and (3) the third case is tested using the economic emission dispatch (EELD) as a multi-objective problem for 6 generating unit systems. The outcomes of the suggested procedures are contrasted with those of alternative optimization methods. The results show that the suggested strategy is efficient and produces superior optimization outcomes than existing optimization techniques.

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Singh, Pragya, e Aayushi Priya. "A Comprehensive Review on Economic Load Dispatch using Evolutionary Approach". SMART MOVES JOURNAL IJOSCIENCE 3, n. 2 (10 febbraio 2017): 7. http://dx.doi.org/10.24113/ijoscience.v3i2.172.

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Abstract (sommario):

Economic Load Dispatch, ELD can be defined as the way of allocating the load level to the generators of the power plant in such a way that the total demand would be supplied in a most economic manner and completely. In a practical power system, the power plants are not located at the same distance from the centre of loads and their fuel costs are different. Also, under normal operating conditions, the generation capacity is more than the total load demand and losses. Thus, there are many options for scheduling generation. In an interconnected power system, the objective is to find the real and reactive power scheduling of each power plant in such a way as to minimize the operating cost. This means that the generator‟s real and reactive powers are allowed to vary within certain limits so as to meet a particular load demand with minimum fuel cost. This is called optimal power flow problem. In this paper, Economic Load Dispatch (ELD) of real power generation is considered. Economic Load Dispatch (ELD) is the scheduling of generators to minimize total operating cost of generator units subjected to equality constraint of power balance within the minimum and maximum operating limits of the generating units. This paper gives a survey of research work covering the concept of economic load dispatch. Economic load dispatch gives the best saving in cost for any power generation plant operation in which the methodology can be applied by various means from conventional to the advanced. In the past years up to 90s, the conventional techniques were used to make this happen but in the past decades AI techniques have fulfilled the requirements with satisfactory results that are being reviewed.

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Più fonti

Tesi sul tema "LOAD DISPATCH"

Bhatnagar, Rahul. "Dynamic dispatch of direct load control". Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/54736.

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Direct Load Control (DLC) -- the direct control of customer loads by an electric utility for the economic and reliable operation of the power system, is an important and active element of Load Management (LM). Currently attention has focussed on the integration of DLC into system operations. However, as yet, DLC is regarded as a discretionary resource to be used by the system operator based on informed judgment. The integration process has therefore, concentrated on improving the informational inputs to the operator. This dissertation extends the integration from that of a discretionary resource to a dispatchable system resource. The concept of the dynamic dispatch of DLC is formulated and defined to be an online evaluation and utilization of DLC for optimum benefit to the utility, as system conditions change. The concept envisages the use of DLC in an automated mode and coordinated with other system resources for optimum benefit. An important and integral part of the research effort is the development of a cost characterization of DLC. A closed form solution, using a dynamic programming framework, has been developed to estimate the costs of DLC dispatch. The derivation takes into account all operational constraints on the utilization of DLC -- payback characteristics, maximum on-times and minimum recovery times. The cost, defined as the difference in the fuel costs with and without DLC dispatch, were found to be dependent on the cost characteristics of the online generators and the load shape impacts of DLC dispatch. The dynamic dispatch concept is concretized by a power system operations model which incorporates DLC dispatch for fuel cost minimization and peak load shaving. The two modes are toggled by the dispatch algorithm as system conditions change. Results from the model are presented for several combinations of system conditions and DLC system parameters.
Ph. D.

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Ashourpouri, Andisheh. "Demand Dispatch Control for Balancing Load with Generation". Thesis, Curtin University, 2018. http://hdl.handle.net/20.500.11937/70559.

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There are different methods to implement demand management. In this thesis, a Demand Side Frequency Droop is proposed to calculate the require power reduction. Moreover, Demand Dispatch (DD) can provide ancillary service to the grid and maintains the power system frequency. Besides, to improve the operation of DD, the renewable resources and the storage devices are integrated to the DD. The proposed methods in this thesis have been validated through PSCAD software simulation and MATLAB.

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Orike, Sunny. "Investigating evolutionary computation with smart mutation for three types of Economic Load Dispatch optimisation problem". Thesis, Heriot-Watt University, 2015. http://hdl.handle.net/10399/2939.

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The Economic Load Dispatch (ELD) problem is an optimisation task concerned with how electricity generating stations can meet their customers’ demands while minimising under/over-generation, and minimising the operational costs of running the generating units. In the conventional or Static Economic Load Dispatch (SELD), an optimal solution is sought in terms of how much power to produce from each of the individual generating units at the power station, while meeting (predicted) customers’ load demands. With the inclusion of a more realistic dynamic view of demand over time and associated constraints, the Dynamic Economic Load Dispatch (DELD) problem is an extension of the SELD, and aims at determining the optimal power generation schedule on a regular basis, revising the power system configuration (subject to constraints) at intervals during the day as demand patterns change. Both the SELD and DELD have been investigated in the recent literature with modern heuristic optimisation approaches providing excellent results in comparison with classical techniques. However, these problems are defined under the assumption of a regulated electricity market, where utilities tend to share their generating resources so as to minimise the total cost of supplying the demanded load. Currently, the electricity distribution scene is progressing towards a restructured, liberalised and competitive market. In this market the utility companies are privatised, and naturally compete with each other to increase their profits, while they also engage in bidding transactions with their customers. This formulation is referred to as: Bid-Based Dynamic Economic Load Dispatch (BBDELD). This thesis proposes a Smart Evolutionary Algorithm (SEA), which combines a standard evolutionary algorithm with a “smart mutation” approach. The so-called ‘smart’ mutation operator focuses mutation on genes contributing most to costs and penalty violations, while obeying operational constraints. We develop specialised versions of SEA for each of the SELD, DELD and BBDELD problems, and show that this approach is superior to previously published approaches in each case. The thesis also applies the approach to a new case study relevant to Nigerian electricity deregulation. Results on this case study indicate that our SEA is able to deal with larger scale energy optimisation tasks.

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Deilami, Sara. "Optimal dispatch of shunt capacitors and load tap changers in distorted distribution systems using ant colony algorithms". Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/92.

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This thesis investigates the performances of a class of intelligent system algorithms in solving the volt/VAr/THD control problem for large distribution systems. For this purpose, optimal dispatch of Load Tap Changers (LTCs) and Switched Shunt Capacitors in distribution networks with high penetration of nonlinear loads is studied. The optimization problem consists of determination of LTC positions, switched shunt capacitors statuses and proper coordination of these switched elements such that power loss is minimized, voltage profile is improved and total harmonic voltage distortion (THDv) is acceptable while network and operational constraints are satisfied. The Decoupled Harmonic Power Flow (DHPF) is employed for solving the optimization problem. In the next step, an Ant Colony algorithm (ACA) is developed and implemented as an effective and new technique to capture the near global solution of the dispatch problem. Simulation results based on ACA, Genetic Algorithm (GA) and Fuzzy-GA are presented and compared to show the accuracy of the proposed approach.Finally, the application of the developed dispatch ACA in smart grids with Plug-In Electric Vehicle (PEV) charging activities in the residential networks is considered. ACA is first applied on the distribution part of the smart grid to minimize losses, improve voltage profile and mitigate harmonic distortions. Then, a smart load management (SLM) algorithm is proposed and tested for the coordination of PEVs on the residential feeders. The developed algorithm is tested on smart grid configuration with 449 buses consisting of the IEEE 31-bus distribution system connected to a number of low voltage residential feeders populated with PEVs. Simulation results are presented and compared for uncoordinated (random) and SLM coordinated PEV charging considering consumer designated priorities and charging zones.

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Karimishad, Amir. "Transient stability-constrained load dispatch, ancillary services allocation and transient stability assessment procedures for secure power system operation". University of Western Australia. Energy Systems Centre, 2008. http://theses.library.uwa.edu.au/adt-WU2009.0028.

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[Truncated abstract] The present thesis is devoted to the development of new methods for transient stability-constrained optimal power flow, probabilistic transient stability assessment and security-constrained ancillary services allocation. The key objective of the thesis is to develop novel dispatch and assessment methods for power systems operation in the new environment of electricity markets to ensure power systems security, particularly transient stability. A new method for economic dispatch together with nodal price calculations which includes transient stability constraints and, at the same time, optimises the reference inputs to the Flexible AC Transmission System (FACTS) devices for maintaining power systems transient stability and reducing nodal prices is developed. The method draws on the sensitivity analysis of time-domain transient stability simulation results to derive a set of linearised stability constraints expressed in terms of generator active powers and FACTS devices input references. '...' The low computing time requirement of the two-point estimate method allows online applications, and the use of detailed power systems dynamic model for time-domain simulation which offers high accuracy. The two-point estimate method is integrated in a straightforward manner with the existing transient stability analysis tools. The integrated software facility has potential applications in control rooms to assist the system operator in decision making process based on instability risks. The software system when implemented on a cluster of processors also makes it feasible to re-assess online transient stability for any change in system configuration arising from switching control. The method proposed has been tested on a representative power system and validated using the Monte Carlo simulation. In conjunction with the energy market, by which forecasted load demand is met by generator dispatch, ancillary services are required in relation to control for secure system operation and power quality. The final part of the thesis has a focus on the key aspect of allocating these ancillary services, subject to an important constraint that the dispatch of the ancillary services will not impair the system security achieved in the load dispatch. With this focus and requirement, the thesis develops a new dispatch formulation in which the network security constraints are represented in the optimal determination of generator active power schedule and allocation of ancillary services. Contingencies considered include power demand variations at individual load nodes from the values specified for the current dispatch calculation. The required changes in generator active powers to meet the new load demands are represented by additional control variables in the new dispatch formulation which augment those variables in the traditional OPF dispatch calculation. Based on the Lagrange function which includes the extended set of security constraints, the formulation derives the optimality condition to be satisfied by the dispatch solution, together with the marginal prices for individual ancillary service providers and LMPs. The effects of the security constraints are investigated and discussed. Case studies for representative power systems are presented to verify the new dispatch calculation procedure.

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Balani, Spandana. "Smart Grid Technologies for Efficiency Improvement of Integrated Industrial Electric System". ScholarWorks@UNO, 2011. http://scholarworks.uno.edu/td/115.

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The purpose of this research is to identify the need of Smart Grid Technologies in communication between industrial plants with co-generation capability and the electric utilities in providing the most optimum scheme for buying and selling of electricity in such a way that the fuel consumption is minimized, reliability is increased, and time to restore the system is reduced. A typical industrial plant load profile based on statistical mean and variance of industrial plants' load requirement is developed, and used in determining the minimum cost of producing the next megawatt-hours by a typical electric utility. The 24-hour load profile and optimal power flow program are used to simulate the IEEE 39 Bus Test System. The methodology for the use of smart grid technology in fuel saving is documented in the thesis. The results obtained from this research shall be extended to include several industrial plants served by electric utilities in future work by the UNO research team.

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Kumar, Deb Nath Uttam. "Electric vehicles in Smart Grids: Performance considerations". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2015. https://ro.ecu.edu.au/theses/1631.

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Distributed power system is the basic architecture of current power systems and demands close cooperation among the generation, transmission and distribution systems. Excessive greenhouse gas emissions over the last decade have driven a move to a more sustainable energy system. This has involved integrating renewable energy sources like wind and solar power into the distributed generation system. Renewable sources offer more opportunities for end users to participate in the power delivery system and to make this distribution system even more efficient, the novel "Smart Grid" concept has emerged. A Smart Grid: offers a two-way communication between the source and the load; integrates renewable sources into the generation system; and provides reliability and sustainability in the entire power system from generation through to ultimate power consumption. Unreliability in continuous production poses challenges for deploying renewable sources in a real-time power delivery system. Different storage options could address this unreliability issue, but they consume electrical energy and create signifcant costs and carbon emissions. An alternative is using electric vehicles and plug-in electric vehicles, with two-way power transfer capability (Grid-to-Vehicle and Vehicle-to-Grid), as temporary distributed energy storage devices. A perfect fit can be charging the vehicle batteries from the renewable sources and discharging the batteries when the grid needs them the most. This will substantially reduce carbon emissions from both the energy and the transportation sector while enhancing the reliability of using renewables. However, participation of these vehicles into the grid discharge program is understandably limited by the concerns of vehicle owners over the battery lifetime and revenue outcomes. A major challenge is to find ways to make vehicle integration more effective and economic for both the vehicle owners and the utility grid. This research addresses problems such as how to increase the average lifetime of vehicles while discharging to the grid; how to make this two-way power transfer economically viable; how to increase the vehicle participation rate; and how to make the whole system more reliable and sustainable. Different methods and techniques are investigated to successfully integrate the electric vehicles into the power system. This research also investigates the economic benefits of using the vehicle batteries in their second life as energy storage units thus reducing storage energy costs for the grid operators, and creating revenue for the vehicle owners.

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Ansari, Sardar. "Optimization and Spatial Queueing Models to Support Multi-Server Dispatching Policies with Multiple Servers per Station". VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3249.

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In this thesis, we propose novel optimization and spatial queueing models that expand the currently existing methods by allowing multiple servers to be located at the same station and multiple servers to be dispatched to a single call. In particular, a mixed integer linear programming (MILP) model is introduced that determines how to locate and dispatch ambulances such that the coverage level is maximized. The model allows multiple servers to be located at the same station and balances the workload among them while maintaining contiguous first priority response districts. We also propose an extension to the approximate Hypercube queueing model by allowing multi-server dispatches. Computational results suggest that both models are effective in optimizing and analyzing the emergency systems. We also introduce the M[G]/M/s/s queueing model as an extension to the M/M/s/s model which allows for multiple servers to be assigned to a single customer.

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Lima, João Paulo de. "Um método de busca tabu direcionada a pontos singulares e o problema de despacho econômico com pontos de válvula /". Bauru, 2019. http://hdl.handle.net/11449/191213.

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Orientador: Edmea Cassia Baptista
Resumo: O problema de Despacho Econômico com Ponto de Válvula é um importante problema relacionado aos Sistemas Elétricos de Potência, que pode ser formulado como um problema de otimização não linear, não convexo e não diferenciável, o que dificulta sua resolução através de métodos exatos. Pode-se observar na literatura que diversos métodos heurísticos são propostos para a resolução do mesmo, os quais são eficientes e com um baixo custo computacional. Uma das desvantagens desses métodos é o tamanho do espaço de busca para realizer tais testes. Pesquisas realizadas apontam que, na grande maioria das vezes, os pontos ótimos para o problema de Despacho Econômico com Ponto de Válvula se encontram em pontos nos quais a função modular, presente na formulação do problema, possui valor nulo, ou estão na região destes e tais pontos são denominados de Pontos Singulares. Neste trabalho, com o bjetivo de propor um método heurístico com espaço de busca reduzido, é proposto um método de Busca Tabu direcionada a Pontos Singulares, o qual utiliza o método de Busta Tabu para percorrer os pontos nos quais a função modular se anula. O método se mostra eficiente para problemas de DEPV de 3, 13 e 40 geradores, com valores próximos aos valores ótimos obtidos por métodos determinísticos e com baixo custo computacional.
Abstract: The problem of Economic Load Dispatch with Valve Point (EDVP) is an important problem related to Electric Power Systems, that can be formulated as a non-linear, non-convex and non-differentiable optimization problem, that difficults resolution through deterministic methods. We can observe in the literature that many heuristic methods are proposed for the resolution of the same, being efficient with a low computational cost. One of the advantages of this methods is the size of the search space necessary to perform the tests. Researches points out that, in most cases, the optimal points for the Economic Load Dispatch with Valve Point problem are at points where the modular function present in the problem formulation has zero value, or in the region thereof, these points are called Singular Points. In this work is proposed, with the objective to propose a heuristic method with the search space reducted, a Tabu Search Directed to Singular Point Search, which uses he tatbu search method to the points in which the modular function cancels out. The method is efficient for resolution of Economic Load Dispatch with Valve Point problems of 3, 13 and 40 generators unities, with values close to optimal obtained by deterministic methods values and low computational cost.
Mestre

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Guilmineau, Justine Valérie Magali. "Study of a generation capacity expansion on an island". Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-287354.

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Abstract (sommario):

The study carried out in this master thesis is part of a larger project led by Energynautics GmbH focusing on renewable energy development in the Caribbean. One of the Caribbean states, consisting of multiple islands, has set a target of 30 % of renewable energy in the power sector by 2030. The first objective of the thesis is to develop optimal generation capacity expansion plans for two different islands of this country, utilizing solar PV generation, which is the only available renewable energy resource. To achieve this objective, three main tasks are identified. The first is the development of an optimal generation capacity expansion plan for the next three years using the optimization tool HOMER Energy. At the beginning only diesel generation is present on the islands. For each study case year, the installed capacity of PV and BESS is optimized and enabling technologies such as curtailment (controllability of PV) and grid-forming inverters are deployed. The second task focuses on the development of a new dispatch strategy, improving on the black box dispatch algorithms built into HOMER. The dispatch strategy minimises the cost of electricity generation and is based on a rolling 48 hours forecasts of the load and PV. It is implemented in MATLAB and linked to HOMER via the built-in MATLAB interface. As HOMER is focused on generation expansion and dispatch and inherently neglects the grid, a grid study is required to assess the stability of the network. This study is the last task of the thesis and is limited to determined steady-state voltage and the asset loading on one of the studied islands through load flow simulations in DIgSILENT PowerFactory. It is shown that there are no major issues even at high PV shares, however, grid performance can be improved if the PV unit is equipped with reactive power capability to control the voltage. A study on the impact of the Q(U)- control and the PQ-capability of the PV and BESS inverters is performed.
Studien som genomförts i detta examensarbete är en del av ett större projekt vilket leds av Energynautics GmbH med fokus på utveckling av förnybar energi i Karibien. En av de Karibiska staterna, bestående av flera öar, har ett mål på 30 % förnybar energi i elkraftssektorn innan 2030. Första syftet med examensarbetet är att utveckla optimala utbyggnadsplaner för produktionskapaciteten för två olika öar i detta land, med användning av solcellsproduktion, vilket är den enda tillgängliga förnybara energikällan. Den första uppgiften är utvecklingen av en optimal utbyggnadsplan för produktionskapaciteten för de kommande tre åren med optimeringsverktyget HOMER Energy. Från början fanns det bara dieselgeneratorer på öarna. För varje studerat år optimeras den installerade kapaciteten av PV och BESS samt aktivering av möjliggörande teknologier som begränsning av PV-produktion och grid-forming växelriktare. Den andra uppgiften fokuserar på utvecklingen av en ny driftsstrategi, förbättring av den basala driftsalgoritm som är inbyggd i HOMER. Driftsstrategin minimerar kostnaden av elproduktionen och är baserad på en 48 timmars prognos av laster och PV. Den är implementerad i MATLAB och kopplad till HOMER via det inbyggda MATLABgränssnittet. Eftersom HOMER fokuserar på produktionsutbyggnad och drift och i praktiken försummar elnätet, krävs en studie av elnätet för att utvärdera stabiliteten av elnätet. Studien av denna sista uppgift i examensarbetet är begränsad till att bestämma spänningen vid jämnviktsläge och den utvärderade lasten på en av de studerade öarna genom belastningsfördelningsberäkning i DIgSILENT PowerFactory. Det visade sig att det inte fanns några stora problem även med stora andelar PV, men elnätets prestanda kan förbättras om PV-omriktarna är utrustade med reaktiv effektstyrning som kontrollerar spänningen. En studie avinverkan från Q(U)-styrning och PQ-kapacitet av PV- och BESS-växelriktare har utförts.

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Libri sul tema "LOAD DISPATCH"

Mariani, E., e S. S. Murthy. Advanced Load Dispatch for Power Systems. London: Springer London, 1997. http://dx.doi.org/10.1007/978-1-4471-0991-4.

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1920-, Murthy S. S., a cura di. Advanced load dispatch for power systems: Principles, practices, and economics. London: Springer, 1997.

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E, Mariani. Advanced Load Dispatch for Power Systems: Principles, Practices and Economies. London: Springer London, 1997.

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K, Kokula Krishna Hari, a cura di. Genetic Algorithm Approach to Solve Economic Load Dispatch Problem on Three Thermal Plants and A Combined Cycle Co-Generation Plant: ICIEMS 2014. India: Association of Scientists, Developers and Faculties, 2014.

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Nicolas, Nicholas Harris, Sir, 1799-1848., a cura di. The dispatches and letters of Vice Admiral Lord Viscount Nelson. London: Chatham, 1997.

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Nelson, Nelson Horatio. The dispatches and letters of Vice Admiral Lord Viscount Nelson. London: Chatham, 1997.

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Aylmer), Canada Governor in chief (1831-1835 :. Copy of a dispatch from Lieutenant General Lord Aylmer, K.C.B., to the Right Honorable the Earl of Aberdeen, K.T. dated Castle of St. Lewis, Quebec, 18th March 1835, ordered to be printed, 9th January 1835: Copie d'une dépêche du Lieutenant Général Lord Aylmer, C.C.B. au Trés-Honorable Comte d'Aberdeen, C.C. datée Château St. Louis, Québec, 18 mars 1835, l'impression ordonnée le 9 janvier 1835. [Québec?: s.n., 1993.

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Sahay, Kishan Bhushan, Abhishek Kumar e Srivastava S. K. Implementation of Optimization Algorithms to Solve Economic Load Dispatch Problem. Independently Published, 2018.

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Sahay, Kishan, Shiv Jaiswal e Abhishek Kumar. Implementation of Optimization Algorithms to Solve Economic Load Dispatch Problem. Independently Published, 2017.

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Nelson, Horatio. Dispatch Lord Nelson V3-Softbound (Dispatches and Letters of Lord Nelson). Greenhill Books, 2006.

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Capitoli di libri sul tema "LOAD DISPATCH"

Rahmani-Andebili, Mehdi. "Problems: Load Flow and Economic Load Dispatch". In Power System Analysis, 85–89. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-84767-8_9.

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Mariani, E., e S. S. Murthy. "Load-Generation Balance". In Advanced Load Dispatch for Power Systems, 91–132. London: Springer London, 1997. http://dx.doi.org/10.1007/978-1-4471-0991-4_6.

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Mariani, E., e S. S. Murthy. "Facilities at Load Dispatch Centres". In Advanced Load Dispatch for Power Systems, 27–51. London: Springer London, 1997. http://dx.doi.org/10.1007/978-1-4471-0991-4_3.

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Tiwari, Satyam, Nidhi Singh Pal, M. A. Ansari, Dilip Yadav e Nivedita Singh. "Economic Load Dispatch Using PSO". In Micro-Electronics and Telecommunication Engineering, 51–64. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2329-8_6.

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Kumar, Rohit, Nidhi Singh, M. A. Ansari e Santosh Kumar Yadav. "Economic Load Dispatch Using Evolutionary Technique". In Advances in Smart Communication and Imaging Systems, 665–84. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9938-5_62.

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Rahmani-Andebili, Mehdi. "Solutions of Problems: Load Flow and Economic Load Dispatch". In Power System Analysis, 91–101. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-84767-8_10.

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Mariani, E., e S. S. Murthy. "Introduction". In Advanced Load Dispatch for Power Systems, 1–9. London: Springer London, 1997. http://dx.doi.org/10.1007/978-1-4471-0991-4_1.

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Mariani, E., e S. S. Murthy. "Objectives, Functions and Location of Load Dispatch Centres". In Advanced Load Dispatch for Power Systems, 11–25. London: Springer London, 1997. http://dx.doi.org/10.1007/978-1-4471-0991-4_2.

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Mariani, E., e S. S. Murthy. "Telecommunications in Power System Operation". In Advanced Load Dispatch for Power Systems, 53–73. London: Springer London, 1997. http://dx.doi.org/10.1007/978-1-4471-0991-4_4.

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Mariani, E., e S. S. Murthy. "Determination of Operating Reserve". In Advanced Load Dispatch for Power Systems, 75–90. London: Springer London, 1997. http://dx.doi.org/10.1007/978-1-4471-0991-4_5.

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Atti di convegni sul tema "LOAD DISPATCH"

Singh, Monu, Deepika e Munish Kumar. "Economic load dispatch calculator". In 2014 6th IEEE Power India International Conference (PIICON). IEEE, 2014. http://dx.doi.org/10.1109/34084poweri.2014.7117617.

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Singh, Monu, Deepika e Munish Kumar. "Economic load dispatch calculator". In 2014 6th IEEE Power India International Conference (PIICON). IEEE, 2014. http://dx.doi.org/10.1109/poweri.2014.7117617.

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Kaur, Avneet, Manmohan Singh e Js Dhillon. "Economic Load Dispatch using HCGSA". In 2021 IEEE 2nd International Conference On Electrical Power and Energy Systems (ICEPES). IEEE, 2021. http://dx.doi.org/10.1109/icepes52894.2021.9699770.

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Chao-Lung Chiang. "Genetic algorithm for power load dispatch". In 2008 IEEE Conference on Cybernetics and Intelligent Systems (CIS). IEEE, 2008. http://dx.doi.org/10.1109/iccis.2008.4670767.

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Lingala, Ramadevi, Abhinaya Bethina, P. V. Ramana Rao e K. Sumanth. "Economic load dispatch using heuristic algorithms". In 2015 IEEE International WIE Conference on Electrical and Computer Engineering (WIECON-ECE). IEEE, 2015. http://dx.doi.org/10.1109/wiecon-ece.2015.7443983.

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Andalu, Gopagoni, Beeram Pranitha, Padmawar Saivishal e Mydam SaiVinay. "Economic Load Dispatch Using Machine Learning". In 2023 4th International Conference for Emerging Technology (INCET). IEEE, 2023. http://dx.doi.org/10.1109/incet57972.2023.10170033.

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Saka, Mustafa, Suleyman Sungur Tezcan, Ibrahim Eke e M. Cengiz Taplamacioglu. "Economic load dispatch using vortex search algorithm". In 2017 4th International Conference on Electrical and Electronic Engineering (ICEEE). IEEE, 2017. http://dx.doi.org/10.1109/iceee2.2017.7935796.

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Wang, Zhen, Yunfan Shao, Xun Dou, Jun Wang e Xin Zhang. "Optimal dispatch of microgrid considering interruptible load". In 2020 12th IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2020. http://dx.doi.org/10.1109/appeec48164.2020.9220583.

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Singh, Harinder Pal, Yadwinder Singh Brar e D. P. Kothari. "Multiobjective load dispatch using Particle Swarm Optimization". In 2013 IEEE 8th Conference on Industrial Electronics and Applications (ICIEA 2013). IEEE, 2013. http://dx.doi.org/10.1109/iciea.2013.6566379.

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Rai, Himanshu, e H. K. Verma. "Economic Load Dispatch Using Jellyfish Search Optimizer". In 2021 10th IEEE International Conference on Communication Systems and Network Technologies (CSNT). IEEE, 2021. http://dx.doi.org/10.1109/csnt51715.2021.9509624.

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Rapporti di organizzazioni sul tema "LOAD DISPATCH"

Soummane, Salaheddine, Amro Elshurafa, Hatem Al Atawi e Frank Felder. Cross-seasonal Fuel Savings from Load Shifting in the Saudi Industrial Sector. King Abdullah Petroleum Studies and Research Center, aprile 2022. http://dx.doi.org/10.30573/ks--2022-dp01.

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Abstract (sommario):

Load shifting, that is, moving demand from peak to off-peak hours, is an important type of demand response. It can reduce the overall operating costs of a power system and improve the reliability of the power grid. This study estimates the financial implications of load shifting in the Saudi industrial sector. We use a national Saudi power system dispatch optimization model to simulate three scenarios. With this model, we quantify the impacts of shifting industrial loads from the peak summer to the off-peak winter months, keeping industrial electricity tariffs unchanged.

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Beshouri, Greg, e Bob Goffin. PR-309-17203-R01 Starting Damage on Legacy Pipeline Engines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), luglio 2018. http://dx.doi.org/10.55274/r0011499.

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Abstract (sommario):

The application of modern automation and combustion control technologies has greatly increased the reliability of engine operation when operating under load. Detonation and preignition along with unanticipated shutdowns have been reduced if not eliminated on modernized legacy engines. However starting and unloaded operation can result insubstantial detonation and preignition resulting in pressure and temperatures which significantly exceed loaded operation. In addition, these combustion aberrations can trip an engine off line before it achieves stable loaded operation. This will result in a failed start and may trigger the dispatch of a technician to investigate and resolve the problem. This paper looks at methods to detect and quantify damage during startup in two cycle gas engines. It finds that detection of various damaging cycles is achievable using pressure waveform characteristics. It also demonstrates that aberrant cycles are much more common in the startup phase than shutdown/idle and that generally damage tends to be concentrated in a few "problem" pistons rather than spread evenly across the engine. This report has a related webinar.

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