For the impact of intermittent resources＇ high penetration on the economic dispatch of islanded microgrid, a new economic dispatch method is presented to minimize the overall generating cost for islanded microgrid, c...For the impact of intermittent resources＇ high penetration on the economic dispatch of islanded microgrid, a new economic dispatch method is presented to minimize the overall generating cost for islanded microgrid, considering a cooperative strategy between diesel generator （hereinafter referred to as DE） and battery energy storage system （BESS）. The optimum economic operation range of DE and the optimal set-point between DE and BESS are presented in the cooperative dispatch strategy, in which BESS is used fully to enable DE in a lower cost and higher efficient way. The results are analyzed under various operation conditions and also prove the validity of the DrODosed method.展开更多
In this paper, the efficient population utilization strategy for particle swarm optimization (EPUSPSO) is proposed to solve the economic load dispatch (ELD) problem of power system. This algorithm improves the accurac...In this paper, the efficient population utilization strategy for particle swarm optimization (EPUSPSO) is proposed to solve the economic load dispatch (ELD) problem of power system. This algorithm improves the accuracy and the speed of its convergence by changing the number of particles effectively, and improving the velocity equation and position equation. In order to verify the effectiveness of the algorithm, this algorithm is tested in three different ELD cases of power system include IEEE 3-unit case, 13-unit case, and 40-unit case, and the obtained results are compared with those obtained from other algorithms using the same system parameters. The compared results show that the algorithm can find the optimal solution effectively and accurately, and avoid falling into the local optimal problem;meanwhile, faster speed can be ensured in the case.展开更多
A chance-constrained energy dispatch model based on the distributed stochastic model predictive control(DSMPC)approach for an islanded multi-microgrid system is proposed.An ambiguity set considering the inherent uncer...A chance-constrained energy dispatch model based on the distributed stochastic model predictive control(DSMPC)approach for an islanded multi-microgrid system is proposed.An ambiguity set considering the inherent uncertainties of renewable energy sources(RESs)is constructed without requiring the full distribution knowledge of the uncertainties.The power balance chance constraint is reformulated within the framework of the distributionally robust optimization(DRO)approach.With the exchange of information and energy flow,each microgrid can achieve its local supply-demand balance.Furthermore,the closed-loop stability and recursive feasibility of the proposed algorithm are proved.The comparative results with other DSMPC methods show that a trade-off between robustness and economy can be achieved.展开更多
热电联产(combined heat and power,CHP)机组作为区域综合能源系统中的核心耦合单元,是实现其高效运行的关键。然而CHP机组固有的热电耦合特性对其灵活调节能力和运行性能的提升存在一定限制,且其“以电定热”和“以热定电”的调度策略...热电联产(combined heat and power,CHP)机组作为区域综合能源系统中的核心耦合单元,是实现其高效运行的关键。然而CHP机组固有的热电耦合特性对其灵活调节能力和运行性能的提升存在一定限制,且其“以电定热”和“以热定电”的调度策略缺乏前瞻性考虑多元负荷和可再生能源的波动特征。集成储能系统可有效实现热电解耦,然而储能的充放电能力受其能量状态的影响。基于此,该文采用长短记忆神经网络对区域综合能源系统中多元负荷及可再生能源进行预测,以考虑多元负荷及可再生能源的时序波动,提出耦合源-荷多元预测与电热混合储能的主动调度策略。构建计及碳排放惩罚、可再生能源弃电惩罚及运行成本的优化调度模型。以某区域综合能源系统为例,对比分析“以电定热”、“以热定电”和“主动调度”策略。结果显示,长短记忆神经网络的最大预测误差为4.7%。采用电-热混合储能主动调度策略的运行成本比“以电定热”和“以热定电”运行策略分别降低了11.12%和3.67%。此外,主动调度策略可在平滑热电比负荷曲线的同时降低区域综合能源系统购电成本,并且对CHP机组的能效具有促进作用,进一步降低了区域综合能源系统的运行成本。展开更多
基金the National Natural Science Foundation of China(No.61703068)the Scientific and Technological Research Program of Chongqing Municipal Education Commission(No.KJ1704097)+1 种基金the Chongqing Basic Science and Advanced Technology Research Project(No.cstc2016jcyjA1919)the Doctor Start-up Funding of Chongqing University of Posts and Telecommunications(No.A2016-05)
文摘For the impact of intermittent resources＇ high penetration on the economic dispatch of islanded microgrid, a new economic dispatch method is presented to minimize the overall generating cost for islanded microgrid, considering a cooperative strategy between diesel generator （hereinafter referred to as DE） and battery energy storage system （BESS）. The optimum economic operation range of DE and the optimal set-point between DE and BESS are presented in the cooperative dispatch strategy, in which BESS is used fully to enable DE in a lower cost and higher efficient way. The results are analyzed under various operation conditions and also prove the validity of the DrODosed method.
文摘In this paper, the efficient population utilization strategy for particle swarm optimization (EPUSPSO) is proposed to solve the economic load dispatch (ELD) problem of power system. This algorithm improves the accuracy and the speed of its convergence by changing the number of particles effectively, and improving the velocity equation and position equation. In order to verify the effectiveness of the algorithm, this algorithm is tested in three different ELD cases of power system include IEEE 3-unit case, 13-unit case, and 40-unit case, and the obtained results are compared with those obtained from other algorithms using the same system parameters. The compared results show that the algorithm can find the optimal solution effectively and accurately, and avoid falling into the local optimal problem;meanwhile, faster speed can be ensured in the case.
基金Supported by the National Natural Science Foundation of China(No.U24B20156)the National Defense Basic Scientific Research Program of China(No.JCKY2021204B051)the National Laboratory of Space Intelligent Control of China(Nos.HTKJ2023KL502005 and HTKJ2024KL502007)。
文摘A chance-constrained energy dispatch model based on the distributed stochastic model predictive control(DSMPC)approach for an islanded multi-microgrid system is proposed.An ambiguity set considering the inherent uncertainties of renewable energy sources(RESs)is constructed without requiring the full distribution knowledge of the uncertainties.The power balance chance constraint is reformulated within the framework of the distributionally robust optimization(DRO)approach.With the exchange of information and energy flow,each microgrid can achieve its local supply-demand balance.Furthermore,the closed-loop stability and recursive feasibility of the proposed algorithm are proved.The comparative results with other DSMPC methods show that a trade-off between robustness and economy can be achieved.
文摘热电联产(combined heat and power,CHP)机组作为区域综合能源系统中的核心耦合单元,是实现其高效运行的关键。然而CHP机组固有的热电耦合特性对其灵活调节能力和运行性能的提升存在一定限制,且其“以电定热”和“以热定电”的调度策略缺乏前瞻性考虑多元负荷和可再生能源的波动特征。集成储能系统可有效实现热电解耦,然而储能的充放电能力受其能量状态的影响。基于此,该文采用长短记忆神经网络对区域综合能源系统中多元负荷及可再生能源进行预测,以考虑多元负荷及可再生能源的时序波动,提出耦合源-荷多元预测与电热混合储能的主动调度策略。构建计及碳排放惩罚、可再生能源弃电惩罚及运行成本的优化调度模型。以某区域综合能源系统为例,对比分析“以电定热”、“以热定电”和“主动调度”策略。结果显示,长短记忆神经网络的最大预测误差为4.7%。采用电-热混合储能主动调度策略的运行成本比“以电定热”和“以热定电”运行策略分别降低了11.12%和3.67%。此外,主动调度策略可在平滑热电比负荷曲线的同时降低区域综合能源系统购电成本,并且对CHP机组的能效具有促进作用,进一步降低了区域综合能源系统的运行成本。
