中国电机工程学报2017，Vol.37Issue(24)：7143-7153,11.DOI:10.13334/j.0258-8013.pcsee.170335
基于MMC-UPFC对称分量控制的输电线路三相不平衡治理
Suppression of Three-phase Unbalanced Current of Transmission Lines Based on Symmetrical Component Control of MMC-UPFC
摘要
Abstract
In this paper, a general control strategy based on modular multilevel converter (MMC)-unified power flow controller (UPFC) was proposed to control the three-phase unbalance of transmission line by series negative sequence voltage in the line. The dual-loop controller of MMC-UPFC in positive and negative synchronous rotating reference frame was established and the effect of different transformer connection modes on zero sequence components was analyzed. In addition, the corresponding circulating current suppressing controller was designed. The operation range of MMC-UPFC was analyzed quantitatively under the balanced conditions and three-phase unbalanced suppression control, and the mathematic analysis formula of the operation range of MMC-UPFC was given. The accuracy of the formula was verified against the point-by-point scanning method. MMC- UPFC and related control system model were built in PSCAD/ EMTDC, and simulation of three-phase unbalanced control was carried out in different situations. The simulation results show that the control method proposed in this paper has good control universality and robustness, and can effectively deal with the three-phase unbalance caused by various reasons.关键词
统一潮流控制器/模块化多电平换流器/三相不平衡/环流抑制控制器/潮流调节Key words
unified power flow controller (UPFC)/modular multilevel converter (MMC)/three-phase unbalanced/circulating current suppressing controller/power flow regulation分类
信息技术与安全科学引用本文复制引用
满九方,郝全睿,高厚磊,李正,王淑颖..基于MMC-UPFC对称分量控制的输电线路三相不平衡治理[J].中国电机工程学报,2017,37(24):7143-7153,11.基金项目
国家自然科学基金项目(51507093) （51507093）
中国博士后基金项目(2015M572029). Project Supported by National Natural Science Foundation of China (51507093) （2015M572029）
Chinese Postdoctoral Science Foundation (2015M572029). （2015M572029）
