混合型动态无功补偿及检测方法  

Hybrid Dynamic Reactive Compensation and Its Detection Methods

作　　者：任明炜[1] 孙运全[1] 张好明[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《中国农村水利水电》2008年第6期81-83,90,共4页China Rural Water and Hydropower

基　　金：江苏省高校自然基金(06KJB470015);江苏省工业攻关项目(BE2007069);江苏大学高级人才专项基金资助(07JDG036)

摘　　要：谐波和无功功率实时、精确的检测与分析,是电力系统谐波抑制和动态无功补偿的前提。针对无功需求变化频繁的系统,分析了一种混合型动态无功补偿技术,这种技术克服了TSC和TCR的缺点,能动态补偿无功和消除谐波,同时指出基波无功电流准确、快速地检测,是TSC+TCR+LC混合型动态无功补偿系统实现其补偿功能的前提。在瞬时无功功率理论的基础上,结合小波分析理论提出了一种新的基波无功检测方法,并应用于TSC+TCR+LC混合型动态无功补偿系统。实验结果证实了该方法能提取电网中的基波无功电流,且检测精度高、响应速度快。混合型动态无功补偿系统从理论分析到实验运行的成功将极大地促进混合型动态无功补偿技术在工业中的广泛应用。Detecting and analyzing precisely in real time of harmonics and reactive power are the precondition of harmonics suppression and reactive compensation. A new technology for reactive compensation of TSC＋TCR＋LC, which overcomes the shortcomings of TCR and TSC, can compensate reactive power dynamically and harmonics suppression. It is also pointed out that accurate, rapid de- tection of fundamental reactive current is a precondition of TSC＋TCR＋LC hybrid dynamic reactive power compensation to achieve its compensation function. A new method combined with the wavelet analysis of fundamental reactive power is proposed based on the instantaneous reactive theory used in TCR＋TSC＋LC hybrid dynamic compensator. Experiment results prove that the method can pick up the fundamental reactive current precisely and high response speed. The success of both theoretical analysis and experimental operation of hybrid dynamic reactive power compensation will boost its wide use in industry.

关 键 词：动态无功补偿 检测 瞬时无功 小波分析 基波无功 

分 类 号：TM714.3[电气工程—电力系统及自动化]