电力系统自动化2018，Vol.42Issue(2)：20-25,142,7.DOI:10.7500/AEPS20170707009
电网故障下的电能路由器直流电容电压平衡控制策略
Voltage Balancing Control Strategy for DC Capacitor of Electrical Energy Router Under Power Grid Failure
摘要
Abstract
A three-layer voltage balancing control strategy for DC capacitor is proposed to solve the DC capacitor voltage unbalance problem of electrical energy router under power grid failure.Based on the theoretical analysis of the unbalance power,the injection of zero-sequence voltage and negative-sequence current can flexibly share the responsibility of inter-phase unbalance power by dynamically adjusting the defined weighting coefficient,which improves the control freedom of the system. The simulation platform of electrical energy router is established in MATLAB/Simulink.The simulation results show that, when a single-phase failure (95％ grid-voltage sag) occurs,the voltage balancing control goal of DC capacitor in electrical energy router can be achieved by independently using the injections of the single zero-sequence voltage,the weighted integration of zero-sequence voltage and negative-sequence current,or the single negative-sequence current.关键词
电能路由器/电网故障/电压平衡控制/零序电压/负序电流Key words
electrical energy router/grid failure/voltage balancing control/zero-sequence voltage/negative-sequence current引用本文复制引用
肖迁,何晋伟,王浩,贾宏杰..电网故障下的电能路由器直流电容电压平衡控制策略[J].电力系统自动化,2018,42(2):20-25,142,7.基金项目
国家高技术研究发展计划(863计划)资助项目(2015AA050403 ) （863计划）
国家重点研发计划资助项目(2017YFB0902001). This work is supported by National High Technology Research and Development Program of China (863 Program) (No.2015AA050403) and National Key Research and Development Program of China(No.2017YFB0902001). （2017YFB0902001）
