摘要
研究了独立运行光储直流微电网中混合储能系统的功率分配控制策略。为了将混合储能系统需要响应的净功率按其波动频率合理地分配给锂电池和超级电容,设计了基于电感电流的改进虚拟RC下垂控制策略,并对其工作原理进行分析。针对虚拟RC下垂控制存在母线电压偏差的问题,研究了基于模糊下垂系数算法的虚拟RC下垂控制策略,分析了该控制策略同时实现母线电压及超级电容SOC自恢复的控制机理。最后搭建了基于RTDS与DSP的硬件在环实验平台,对上述控制策略进行了硬件在环实验验证。实验结果表明,模糊虚拟RC下垂控制能够根据既定的模糊规则对下垂系数进行实时调整,其响应速度较快,但是仍然存在一定的电压偏差。
This paper presents a study on the power distribution control strategy of hybrid energy storage system in the isolated DC microgrid.To distribute the power of hybrid energy storage system to battery and supercapacitor according to its fluctuation frequency reasonably,an improved virtual RC droop control strategy based on inductor current is designed,and its working principle is analyzed.For the question that the droop control lead to deviation of bus voltage,the virtual RC droop control strategy based on fuzzy droop algorithm is studied on the basis of the virtual RC droop control,and the principle of self-recovery of bus voltage and supercapacitor SOC is analyzed.Finally,a hardware-in-the-loop experimental platform based on RTDS and DSP is built to verify the proposed control strategies,and the experiment results show that the fuzzy virtual RC droop control can adjust the droop coefficient in real time according to the established fuzzy rules,and its response speed is fast,but there a certain degree of voltage deviation still exists.
作者
崔俊昊
田桂珍
刘广忱
郭子豪
CUI Junhao;TIAN Guizhen;LIU Guangchen;GUO Zihao(School of Electric Power,Inner Mongolia University of Technology,Hohhot 010080,Inner Mongolia,China;Inner Mongolia Key Laboratory of Electrical Energy Conversion Transmission and Control,Hohhot 010080,Inner Mongolia,China)
出处
《电网与清洁能源》
CSCD
北大核心
2023年第4期129-136,共8页
Power System and Clean Energy
基金
内蒙古自然科学基金项目(2021MS05003)。
关键词
直流微电网
混合储能系统
功率分配控制
母线电压恢复
模糊控制
DC microgrid
hybrid energy storage system
power distribution control
bus voltage recovery
fuzzy control
