针对智能微电网电压不稳定、功率输出不均问题,提出基于分层控制的光伏与储能联合智能微电网协调优化策略。分析不同运行模式下含光伏与储能设备的智能微电网系统负载功率边界,并提出基于分层控制的放电下垂控制策略和充电模糊控制策略,确定光伏与储能联合智能微电网的新负载功率边界。随后,设计基于分层控制的光伏与储能联合智能微电网协调优化策略,在实现储能模块间充电或放电功率自动调节分配,增强智能微电网负载功率承载能力的同时,可克服电压波动问题。最后,仿真模型和实验平台获得的仿真实验结果证实,所提协调优化策略具有可行性,有利于提高光伏与储能联合智能微电网电压稳定性、安全性及经济性。
Abstract
Aiming at the problems of unstable voltage and uneven power output in smart microgrids, a coordinated optimization strategy based on hierarchical control for photovoltaic and energy storage combined smart microgrids is proposed. Analyze the load power boundary of intelligent microgrid systems containing photovoltaic and energy storage devices under different operating modes, and propose a discharge droop control strategy and charging fuzzy control strategy based on hierarchical control to determine the new load power boundary of the photovoltaic and energy storage joint intelligent microgrid. Subsequently, a coordinated optimization strategy for photovoltaic and energy storage joint intelligent microgrid based on hierarchical control was designed, which can achieve automatic adjustment and distribution of charging or discharging power between energy storage modules, enhance the load power carrying capacity of the intelligent microgrid, and overcome voltage fluctuations. Finally, the simulation results obtained from the simulation model and experimental platform confirm the feasibility of the proposed coordinated optimization strategy, which is conducive to improving the voltage stability, safety, and economy of the photovoltaic and energy storage joint intelligent microgrid.
关键词
光伏 /
储能 /
功率 /
微电网 /
分层控制
Key words
photovoltaics /
energy storage /
power /
microgrid /
layered control
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基金
山西省教育科学“十四五”规划课题（GH-220170）
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