摘要
介绍并分析了一种适用于电网电压不平衡、畸变情况的改进p-q补偿电流检测法及其在静止同步补偿器STATCOM(static synchronous compensator)中的应用。该检测法基于正序检波器的设计,正序检波器能够准确检测出正序基波电压,避免了不平衡电压、谐波电压参与p、q运算,从而能很好地检测出需要补偿的电流分量。此外文中还给出了STATCOM的主电路拓扑结构、脉宽调制技术PWM(pulse width modulation)以及直接电流控制策略。最后,通过仿真实验表明了基于改进p-q检测法的STATCOM装置能快速、准确地对电网进行电流综合补偿。
The improved p-q detection method of compensation current which is suitable for unbalanced grid voltage and distortion and its application in STATCOM is presented. This detection method based on positive sequence detector which can accurately detect the fundamental positive sequence voltage, it also can avoid the unbalanced voltage participate in the p-q operation, so the compensation current component can be accurately detected. In addition, the main circuit topology structure of STATCOM, the pulse width modulation and di- rect current control strategy are also showed in this paper. Finally, the STATCOM device based on improved p-q detection method can quickly and accurately compensate current for the grid, which is verified by the anal- ysis of simulation experiment,
出处
《电力系统及其自动化学报》
CSCD
北大核心
2012年第6期95-99,共5页
Proceedings of the CSU-EPSA
关键词
静止同步补偿器
级联H桥
检测方法
瞬时无功理论
static synchronous compensator（STATCOM）
cascaded H-bridge
detection method
instantane-ous reactive-power theory
