基于级联式模糊控制的电氢耦合直流微网能量管理策略研究  

An energy management strategy for an electricity-hydrogen coupled DC microgrid based on cascade fuzzy control

作　　者：李建林 梁策[1] 曾飞 袁晓冬 LI Jianlin;LIANG Ce;ZENG Fei;YUAN Xiaodong(National User-side Energy Storage Innovation Research and Development Center(North China University of Technology),Beijing 100144,China;State Grid Jiangsu Electric Power Co.,Ltd.Research Institute,Nanjing 211103,China)

机构地区：[1]国家能源用户侧储能创新研发中心(北方工业大学),北京100144 [2]国网江苏省电力有限公司电力科学研究院,江苏南京211103

出　　处：《电力系统保护与控制》2024年第18期87-100,共14页Power System Protection and Control

基　　金：国家自然科学基金项目资助(52277211);国家电网有限公司科技项目资助(J2023166)。

摘　　要：针对电氢混合储能系统在平抑直流微网中功率波动时面临的功率分配问题,提出了一种基于级联式模糊控制的电氢耦合直流微网能量管理策略。该策略中一次模糊控制器依据储氢罐储氢状态(stateofhydrogenstorage,SOH)与锂电池荷电状态(state of charge, SOC)求解出一次功率分配因子,对直流微网净功率进行一次分配;二次模糊控制器结合一次功率分配参考值与SOH对一次功率分配因子作出校正。此外,为使氢储能系统中具有非线性工作特性的电流控制型装置(电解槽、燃料电池)能够对能量管理系统作出高效响应,采用插值法将功率分配参考值转换为电流参考值。通过Matlab/Simulink仿真结果证明,所提能量管理策略有效缩小了氢储能系统在非合理区间的功率波动范围并提高了氢储能系统中装置的响应精度与速度。An energy management strategy for an electricity-hydrogen coupled DC microgrid based on cascade fuzzy control is proposed to address the power allocation problem faced by an electricity-hydrogen hybrid energy storage system when smoothing out power fluctuations in a DC microgrid.In this strategy,the primary fuzzy controller works out the primary power allocation factor based on the state of hydrogen storage(SOH)of the hydrogen storage tank and the state of charge(SOC)of the lithium-ion battery and performs primary allocation of the DC microgrid net power.The secondary fuzzy controller combines the reference value of primary power allocation and the SOH to correct the primary power allocation factor.In addition,to enable current-controlled devices(electrolysers and fuel cells)with nonlinear operating characteristics to respond efficiently to the energy management system,an interpolation method is used to convert the power distribution reference value to a current reference value.Matlab/Simulink simulation results prove that the strategy effectively narrows the power fluctuation range in the unreasonable range and improves the accuracy and speed of the device response in the system.

关 键 词：直流微网 电氢耦合 混合储能系统 能量管理 级联式模糊控制 插值法 

分 类 号：TM721.1[电气工程—电力系统及自动化]