高压直挂式无功和谐波综合补偿器控制策略研究  

Research of Control Strategy for High-voltage Suspended Type Reactive Power and Harmonic Integrative Compensator

作　　者：罗仁俊[1] 张定华[1] 王卫安[1] 黄超[1] 黄燕艳[1] 曹洋[1] 刘华东[1] 唐建宇[1] 

机构地区：[1]株洲变流技术国家工程研究中心有限公司,湖南株洲412001

出　　处：《大功率变流技术》2011年第5期50-57,共8页HIGH POWER CONVERTER TECHNOLOGY

基　　金：国家科技支撑计划资助(2007BAA12B03)

摘　　要：针对目前中高压系统无功和谐波分开补偿的现状,提出一种基于H桥级联的静止无功发生器与LC并联的高压直挂式补偿结构,利用与低成本LC的结合提高了有源容量的利用率和补偿范围。并在此基础上提出了基于数字带通和多同步旋转坐标的无功、谐波和负序检测及控制,实现了无功功率、指定次谐波和负序电流的实时检测和补偿控制;并针对级联静止无功发生器中多个直流侧电压均衡控制的难题,提出了基于相角叠加的控制策略。文中分析了其拓扑结构及补偿原理,并对综合补偿控制和直流均衡控制进行了详细论述。在Simulink中搭建了仿真平台对整个控制策略进行了校核,并进行了模拟实验,结果表明:该控制方式能实现对无功、谐波和负序的综合补偿,直流侧稳定,具有良好的动态性能。In order to solve the problem that reactive power and harmonic are compensated separately in high and medium voltage grid,a new high voltage suspended compensator constituted by static var generator based on H-bridge cascade and LC in parallel.The utilization and compensative range of active capability are improved by combining a low cost LC.A reactive power,individual harmonic and negative sequence detection method and controlling arithmetic based on digital band pass filter and multiple synchronous rotating coordinates are proposed,thus the real-time detection and compensative control are realized.For the questions of DC voltage balancing control of cascaded SVG,a new control technique of phase angle superposition is described.The topology structure and compensative principle are analyzed and the comprehensive compensative control and DC balancing control are also addressed.The whole control strategy is verified by simulation and experiment,and the results show that this method can achieve compositive compensation effect,DC voltage balancing and stabilization and good dynamic performance.

关 键 词：无功功率 谐波 综合补偿 静止无功发生器 LC滤波器 直流电压均衡控制 

分 类 号：TM761.1[电气工程—电力系统及自动化]