基于正负序分离的无功及负序综合补偿控制策略  

Reactive power and negative sequence integrated compensation control strategy based on positive and negative sequence separation

作　　者：周军[1] 陈念刚 Zhou Jun;Chen Niangang(School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,Jilin China)

机构地区：[1]东北电力大学电气工程学院

出　　处：《电测与仪表》2019年第18期113-119,共7页Electrical Measurement & Instrumentation

基　　金：吉林省科技厅科技发展计划重点科技研发资助项目(20180201010GX)

摘　　要：为了在不平衡负载情况下实现无功和负序补偿,采用基于模块化多电平变换器的静止无功补偿器(MMC-STATCOM)同时进行无功和三相不平衡补偿。以正负序分离控制为核心思想,对传统的双坐标系控制方法进行改进,将正、负序分量分别在dq和αβ坐标系下控制。与传统方法比较降低了结构复杂度,提高了控制灵活性。并在电流直接控制方法的基础上,提出一种双极控制方案。仿真结果验证了所提出的改进方法和综合补偿控制策略的正确性和有效性。In order to achieve reactive power and negative sequence compensation under unbalanced load conditions,the static synchronous compensator based on modular multilevel converter(MMC-STATCOM)is adopted to compensate for reactive power and the three-phase unbalance.Taking the positive and negative sequence separation control as the core idea,the traditional double coordinate system control method is improved,and then,the positive and negative sequence components are controlled separately in the DQ andαβcoordinate system.Compared with the traditional method,this method reduced structural complexity and increased control flexibility.A bipolar control scheme is proposed based on the direct current control method.The simulation results verify the correctness and effectiveness of the improved method and comprehensive compensation control strategy proposed in this paper.

关 键 词：MMC-STATCOM 无功补偿 负序补偿 双坐标系 准PR控制 

分 类 号：TM933[电气工程—电力电子与电力传动]