一种新型SVG的拓扑与控制  

Topology and Model of a Novel SVG

作　　者：武海涛[1] 刘永和[1] WU Hai-tao;LIU Yong-he(Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学电力学院,内蒙古呼和浩特010051

出　　处：《电力电子技术》2018年第11期108-111,共4页Power Electronics

基　　金：内蒙古自治区高等学校科学研究项目(NJZY17104);内蒙古工业大学科学研究基金(ZD201617)~~

摘　　要：提出一种基于电流源变换器(CSC)的静止无功发生器(SVG)新拓扑,利用直流电流复注变换控制技术,解决了常规CSC与交流电网连接需设置吸收电容的难题,变换器交流侧无需设置交流电容器即可保证三相交流电流的连续,同时实现了交流输出电流的多电平化,无需滤波即可获得近似正弦波形。在分析电路结构的基础上给出开关触发时序,推导出系统的数学模型,并给出适用于电流型SVG的无功功率控制方法。仿真和实验证明:所提变换器拓扑结构可行,具有较好的输入输出性能;所给出的无功功率控制方法能使系统准确输出容性无功或感性无功。A new static var generator（SVG） topology based on current source converter（CSC） is proposed.The direct current reinjeetion conversion control technology is used to solve the difficult problem that the conventional CSC needs to set the absorption capacitor when connects to the power grid.The converter alternating current side without alternating current capacitor can guarantee continuous three-phase alternating current,while obtaining the multi-level alternating output current,without filter to obtain an approximate sinusoidal waveform.Based on the analysis of the circuit structure, the firing timing of the switch is given and the mathematical model of the system is deduced, and the reactive power control method for SVG which is based on the current source converter is given.Simulation and experimental results show that the proposed converter topology is feasible and has good input and output performance. The reactive power control method can make the system accurately output capacitive reactive power or inductive reactive 13ower.

关 键 词：电流源变换器 静止无功发生器 控制方法 

分 类 号：TM46[电气工程—电器]