基于SVG的供电系统动态无功补偿及谐波抑制  

SVG-based dynamic reactive power compensation and harmonic suppression of power supply system

作　　者：唐超 向思屿 曾琢琳 张菊玲 张凌浩 TANG Chao;XIANG Si-yu;ZENG Zuo-lin;ZHANG Ju-ling;ZHANG Ling-hao(Electric Power Research Institute,State Grid Sichuan Electric Power Company,Chengdu 610000,China)

机构地区：[1]国网四川省电力公司电力科学研究院,成都610000

出　　处：《沈阳工业大学学报》2022年第6期625-630,共6页Journal of Shenyang University of Technology

基　　金：国家自然科学基金青年科学基金项目(65382372);国网四川省电力公司科技资助项目(52199719001F).

摘　　要：针对电气设备造成的电力系统无功不足和谐波干扰等问题,提出了一种基于SVG的供电系统动态无功补偿及谐波抑制装置和控制策略.采用dq0检测法的电流双闭环控制方法构建了电压型桥式无功补偿系统,并利用并联方式与10 kV配网相连,实现了外环电压控制和内环无功功率的快速响应,从而实现了SVG无功补偿的准确控制.对100组电压信号的测试结果表明,采用该系统可以使平均电压畸变率由补偿前的32.5%降低为补偿后的0.41%,证明了该方法可以保障供电系统的安全性与稳定性.Aiming at the problems of reactive power shortage and harmonic interference in the power system caused by electrical equipment,a device and control strategy based on SVG for dynamic reactive power compensation and harmonic suppression of power supply system were proposed.A voltage bridge reactive power compensation system was established by a current double closed-loop control system based on dq0 detection method and was connected to a 10 kV distribution network in a parallel connection mode.The voltage control of outer ring and the rapid response of the reactive power of inner ring were accomplished,and the accurate control of SVG reactive power compensation was realized.The test results for 100 groups of voltage signals show that the average voltage distortion rate reduces from 32.5%before compensation to 0.41%after compensation,confirming that the as-proposed method can guarantee the security and stability of power supply system.

关 键 词：无功补偿 谐波抑制 电压型桥式电路 双闭环控制 电压稳定 不对称负载 相位缺失 电压畸变率 

分 类 号：TM744[电气工程—电力系统及自动化]