用于不平衡负荷补偿的链式STATCOM控制系统  

Control System of Cascaded STATCOM for Unbalanced Load Compensation

作　　者：杨波[1] 钟彦儒[1] 曾光[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048

出　　处：《西安理工大学学报》2013年第4期392-399,共8页Journal of Xi'an University of Technology

基　　金：陕西省重点学科建设专项资金资助项目(105-00X901)

摘　　要：提出一种适用于不平衡负荷补偿的链式STATCOM控制系统方案。针对串联等效电阻的非线性特性,采用输出线性化方法将非线性系统转化为线性系统。采用结合ip-iq法和对称分量法的分相导纳检测算法,使基波检测延迟时间固定,进而使控制系统设计转化为二阶最佳阻尼比系统设计问题。将负载导纳前馈方法和母线导纳反馈方法结合,提高控制系统的响应速度和稳态精度,进而将控制系统设计转化为无超调二阶临界阻尼比系统设计问题。仿真和实验结果表明控制方案有效且可行。This paper propose a control system scheme suit tor unbalanced load compensanon o~ cast;etu^u STATCOM. Against the nonlinear characteristics of equivalent series resistance, the nonlinear system is converted into a linear system by output linearization method. Split-phase admittance detection algorithm in combination with method of ip-iq and symmetrical components fixes the delay time of the fundamental wave detection; thereby the control system design is converted into second-order optimal damping ratio system design issue. Combination of the load admittance feed-forward method with bus admittance feedforward method can improve the control system response speed and steady precision, and further convert a control system design into a second-order without overshoot critical damping ratio system design issue. Simulation and experiment results show the effectiveness and feasibility of this control system scheme.

关 键 词：链式STATCOM 不平衡负荷补偿 ip—iq法 对称分量法 线性化PID 

分 类 号：TM714.3[电气工程—电力系统及自动化]