不平衡工况下级联STATCOM分时段补偿控制  

Sub-time Compensation Control of Cascade STATCOM in Unbalanced Condition

作　　者：李圣清[1] 徐文祥[1,2] 栗伟周[1] 曾欢悦[1] 

机构地区：[1]湖南工业大学,湖南株洲412007 [2]合肥华威自动化有限公司,安徽合肥231131

出　　处：《电力电子技术》2015年第2期81-83,共3页Power Electronics

基　　金：国家自然科学基金(51077046);湖南省重点建设学科项目(201176)~~

摘　　要：针对不平衡工况下级联静止同步补偿器(STATCOM)的控制问题,分析了级联STATCOM在不平衡工况下的工作特性,推导了正负序环境下的系统解耦控制方程,提出一种新的正负序解耦脉宽调制(PWM)控制方法,分析了该方法下无功补偿和电压控制两种工作模式,并提出分时段补偿的控制方法。仿真和实验表明,利用分时段补偿控制可有效解决级联STATCOM在不平衡工况下的安全运行问题,实现其最大化利用。Aiming at the control problem of cascade static synchronous compensator（STATCOM） in unbalanced condition,the operating characteristics of cascade STATCOM in unbalanced conditions is analyzed,decoupled control equation of the system is derived in the positive and negative sequence environments,a new control method of positive negative decoupling pulse width modulation（PWM） is put forward,the two kinds of work mode within the method are analyzed which are the compensation of reactive power and voltage control.Sub-time compensation control method is proposed.Simulation and experiment show that,compensation for the use of sub-time control method can effectively solve the problem of cascade STATCOM safe operation in unbalanced conditions and achieve the maximum utilization.

关 键 词：静止同步补偿器 不平衡工况 脉宽调制 分时段补偿 

分 类 号：TN715[电子电信—电路与系统]