基于超级电容的直流微电网电压波动抑制研究  

A Method Based on SC ESS for Compensating the Voltage Fluctuations on the DC Bus in DC Microgrids

作　　者：常晓勇[1] 李永丽[1] 陈晓龙[1] 

机构地区：[1]智能电网教育部重点实验室,天津大学,天津300072

出　　处：《电力电子技术》2017年第4期61-64,共4页Power Electronics

基　　金：国家自然科学基金(51577128,51177108)~~

摘　　要：针对直流微电网暂态条件下的直流母线电压波动问题,提出一种基于储能单元的波动抑制方法。首先分析了直流母线电压波动原理;在此基础上,对系统中储能单元的控制算法进行了改进:在已有控制环节的基础上引入跟踪微分器(TD),利用直流母线电压信号,实现对系统暂态不平衡功率的跟踪和补偿,达到抑制母线电压波动的目的;以超级电容(SC)储能单元为对象,通过硬件实验,在不同系统运行模式和不同负荷类型条件下验证了所提方法的控制效果。In order to, overcome the voltage fluctuations on the direct current bus in direct current micmgrids under transient conditions,a suppression method based on an energy storage system is proposed.First of all, the voltage sta. billty of a simplified DC microgrids under transient conditions is analyzed：On this basis,the control of the ESS is. improved, in which charging power of the filter capacitor on the DC bus is introduced by a tracking differentiator（TD）, to compensate the power unbalance in the DC microgrids under transient conditions.The fluctuations of the DC bus voltage is suppressed.A super capacitor ESS is used and the effectiveness of the proposed method is validated by hardware experiments under consideratioin of different system operation modes and different load characteristics.

关 键 词：变换器 超级电容 电压波动 

分 类 号：TM46[电气工程—电器]