中国电机工程学报Issue(27)：20-27,8.
链式星形STATCOM补偿不平衡负载的控制策略
A Control Strategy of Star-connected Cascade Circuit STATCOM for Unbalanced Load Compensation
王松 1谈龙成 1李耀华 1王平 1宋鹏先 1任洪涛1
作者信息
- 1. 中国科学院电力电子与电气驱动重点实验室 中国科学院电工研究所，北京市 海淀区 100190
- 折叠
摘要
Abstract
The star-connected cascade circuit static synchronous compensator (STATCOM) is subjected to the restriction that the sum of three phase output currents is zero. Consequently, in order to compensate the unbalanced load currents, zero-sequence voltage must be added to the phase-to-neutral voltage of the converter, to force the improved phase-to-neutral voltage to be orthogonal to the output current for every phase. This paper firstly deduced the zero-sequence voltage in condition of unbalanced load compensation, the expression of which is unique and the adding is necessary in this working condition. Secondly, the improved reference current detection method was also presented, which can reduce the 2nd ripple effectively. Besides, the zero-sequence voltage calculation presented in this paper depends on reference currents detection completely, without detecting the phases of reference currents in advance. Finally, the precise reference current tracking strategy was also presented based on classical control theory under αβ stationary frame. Simulation and experiment results verify the feasibility and effectiveness of the control strategy.关键词
静止同步补偿器/链式结构/零序电压/不平衡负载补偿/静止坐标系Key words
static synchronous compensator (STATCOM)/cascade circuit/zero-sequence voltage/unbalanced load compensation/stationary frame分类
信息技术与安全科学引用本文复制引用
王松,谈龙成,李耀华,王平,宋鹏先,任洪涛..链式星形STATCOM补偿不平衡负载的控制策略[J].中国电机工程学报,2013,(27):20-27,8.
