当孤岛微电网中的分布式储能单元(Distributed Energy Storage Units,DESU)采用传统下垂控制时,会存在功率不均分问题,造成系统之间存在环流,严重时会造成DESU的损坏。针对这个问题,本文提出一种改进型下垂控制。该方案通过平移下垂特性曲线实现了视在功率的均分,并且该方案不需要中央控制器或者通讯线,降低了系统的建设成本。最后,不同工况下的仿真和实验结果验证了所提方案的有效性。
英文摘要:
when the conventional droop control is adopted by the distributed energy storage units (DESU) in the islanded microgrid, the output powers of inviters are not sharing. It will cause systems circulation, even damage the DESU. Therefore, an improved droop control is proposed to solve this problem. The apparent power sharing is realized by the translation droop characteristic curves, and the central controller or communication line does not required, which reduces the cost of the system. Finally, the simulation and experimental results under different cases verify the effectiveness of the proposed scheme.