摘要
微网的阻抗特性复杂,下垂控制对线路阻抗匹配度要求严格,严重影响了负荷分配的精确度。以多台微网逆变器(MGI)按容量比分配负荷为例,分析了实现负荷准确分配的输出阻抗和连接线阻抗匹配条件。提出了一种含开环补偿项和动、静态变系数下垂的新型下垂控制方法,提高了MGI在四象限中的动、静态负荷分配的准确度。仿真和实验验证了所提出的控制策略和参数设计方法的可行性和有效性。
The deteriorated effects on proportional load distribution are caused by mismatch of the output impedance and the feeder impedance in the conventional droop-control of multi-microgrid inverters(MGIs).The matching condition between output impedance and feeder impedance are revealed in the condition of sharing the load in proportional to their power rating among multi-paralleled inverters.A novel droop controller with adaptive droop coefficients and voltage drop compensations is proposed to share the load accurately in both dynamic and steady state.Additional,the design procedure of the parameters in this proposed controller are provided as well.The simulation and experiment are provided to validate its feasibility and validity.
出处
《电力系统自动化》
EI
CSCD
北大核心
2015年第15期24-29 125,共7页
Automation of Electric Power Systems
基金
国家自然科学基金青年基金资助项目(51407057
51307042)
安徽省自然科学基金青年基金资助项目(413286)~~
