适用于单相负荷的SVG系统研究  

The Research of SVG System Applied in Single Load

作　　者：邢大鹏[1] 章志刚[1] 李佳[1] 王乃会[2] 

机构地区：[1]四川电力职业技术学院(培训中心),成都610039 [2]乐山电业局,四川乐山614000

出　　处：《电测与仪表》2009年第S2期81-83,126,共4页Electrical Measurement & Instrumentation

摘　　要：针对单相负荷引起的无功、谐波等问题,提出采用新型单相SVG系统进行补偿的方案。该SVG系统采用瞬时无功功率检测实时监测负载电流,通过DSP分析计算负荷所产生的谐波和无功,最后采用变结构策略控制单相全桥电路产生需要的电流波形注入电网。该系统不仅能够完全补偿负荷产生的无功和谐波而且能够抑制电网的低频振荡问题。本文通过matlab软件对SVG系统的进行仿真,其仿真结果验证了该方案的正确性和有效性。To solve the problems such as reactive,harmonic that are caused by single load,a novel single-phase SVG system compensation scheme has been proposed.The instantaneous reactive power method has been applied on load current detecting.The harmonics and reactive power will be computed with the help of DSP.The compensating current,which is generated by IGBT circuit controlled by variable structure control method,will be input to grid to solve the power quality problems.The SVG system could not only totally compensate reactive and harmonic that caused by single load but also suppress low -frequency oscillations problem of grid.The SVG system has been simulated in matlab and its result proved the scheme' s correctness and effectiveness.

关 键 词：单相负荷 无功 谐波 SVG 瞬时无功功率 

分 类 号：TM761[电气工程—电力系统及自动化]