基于混合储能系统的微电网母线电压控制策略  

Microgrid Bus Voltage Control Strategy Based on Hybrid Energy Storage System

作　　者：马恒树 高昕[1] MA Hengshu;GAO Xin(Anhui University of Science and Technology,Huai Nan 232001,China)

机构地区：[1]安徽理工大学大学电气与信息工程学院,安徽淮南232001

出　　处：《电子质量》2023年第11期84-88,共5页Electronics Quality

摘　　要：在孤岛直流微电网中,母线电压是判断其稳定性和衡量电能质量的唯一指标。针对这一现象,在孤岛直流微电网中加入了由蓄电池-超级电容组成的混合储能单元来平抑微电网系统中出现的波动功率,同时对于超级电容控制器添加了补偿电流来提升控制精度,差额功率经过低通滤波器后,高频分量经超级电容器平抑,低频分量经蓄电池平抑,对于母线电压不论是瞬时恢复还是长期的稳定性都得到了保障。试验结果表明,不论是光照强度变化还是负载功率变化,含混合储能系统的微电网母线电压都能快速恢复至额定值,无论是电能质量,还是系统稳定性都具有一定的提升。In isolated DC microgrid,bus voltage is the only index to judge its stability and measure power quality.In view of this phenomenon,a hybrid energy storage unit composed of accumulator and supercapacitor is added to the isolated DC microgrid to supress the fluctuating power in the microgrid system,and compensation current is added to the super capacitor controller to improve the control accuracy.After the difference power passes through the low-pass filter,the high frequency component is suppressed by the supercapacitor,and the low frequency component is suppressed by the battery.Both instantaneous recovery and low-term stability of bus voltage are guaranteed.The test results show that the bus voltage of microgrid with hybrid energy storage system can be quickly restored to the rated value regardless of the change of light intensity or load power,and both power quality and system stability can be improved to some extent.

关 键 词：微电网 混合储能系统 蓄电池 超级电容 

分 类 号：TM727[电气工程—电力系统及自动化]