基于信号补偿下垂控制的微电网动态性能分析  

Analysis of microgrid dynamic performance based on droop control algorithm with signal compensation

作　　者：李浩琛 郭志坚 LI Haochen;GUO Zhijian(Electrical Engineering and Automation Department,Shanxi Institute of Technology,Yangquan,Shanxi 045000)

机构地区：[1]山西工程技术学院电气工程与自动化系,山西阳泉045000

出　　处：《电气技术》2022年第10期33-40,共8页Electrical Engineering

基　　金：山西省高等学校科技创新项目(2020L0725)。

摘　　要：传统下垂控制在微电网逆变器并联运行中呈现出无功功率无法均分和电能质量下降的问题。针对这一问题,设计一种基于信号补偿的下垂控制方式。该控制方式是在传统下垂控制中分别添加无功均分差值信号及电压和频率补偿信号,以此来实现无功功率的均分和电能质量的恢复;通过线性化分析对该控制方式进行小信号建模,分析各参数对系统动态性能的影响。最后对逆变器并联模型进行仿真研究,结果表明该控制方式可以在实现功率均分的同时兼顾电能质量且具有良好的冗余性。In the parallel operation of microgrid inverters, traditional droop control presents the problems of non-equal distribution of reactive power and degradation of power quality. In terms of the issues, a droop control with signal compensation is designed. In order to achieve reactive power sharing and power quality recovery, the reactive power sharing difference signals and voltage and frequency compensation signals are added to traditional droop control respectively. For the aim of analyzing dynamic performance, the small signal model is carried out by linearization. Finally, the parallel model of inverters is simulated and verified. The result shows that the algorithm can realize power sharing while taking into account power quality, and has good performance in redundancy.

关 键 词：微电网逆变器 信号补偿 小信号模型 动态性能 

分 类 号：TM73[电气工程—电力系统及自动化]