电力系统保护与控制Issue(4)：136-142,7.
多电平变换器补偿不平衡负载的应用分析
Analysis of multilevel converters in compensating unbalanced load
潘汉广 1王军 2宋勇辉3
作者信息
- 1. 国电南瑞科技股份有限公司，江苏 南京 211106
- 2. 中国林业科学研究院研究生院，北京 100091
- 3. 新疆大学电气工程学院，新疆乌鲁木齐 830047
- 折叠
摘要
Abstract
In order to accurately analyze the performances of cascaded H-bridge with star connection, cascaded H-bridge with delta connection and modular multilevel converter in handling the unbalanced load under the asymmetrical grid fault condition, firstly, this paper builds mathematical models of these three multilevel converters based on the principle of power equilibrium. Then it gives contrastive analysis. The final analysis conclusion is that the STATCOM based on cascaded H-bridge with star connection converter is not suitable for compensating unbalanced load, while the STATCOM based on cascaded H-bridge with delta connection converter can work well to compensate unbalanced load when grid is normal. But the capability of compensating unbalanced load is greatly suppressed when asymmetrical grid fault happens. The the STATCOM based on modular multilevel converter works well to compensate reactive power and negative-sequence current even under serious asymmetrical grid fault condition. Finally, Matlab/simulink simulations verify the correctness and effectiveness of theoretical analysis.关键词
级联H桥星型接法/级联H桥角型接法/模块化多电平变换器/不平衡负载/STATCOMKey words
cascaded H-bridge with star connection/cascaded H-bridge with delta connection/modular multilevel converter/unbalance load/STATCOM分类
信息技术与安全科学引用本文复制引用
潘汉广,王军,宋勇辉..多电平变换器补偿不平衡负载的应用分析[J].电力系统保护与控制,2015,(4):136-142,7.
