A Transformerless Compensator Used in Traction Substation for Load Balancing

摘要：

Most converter-based power conditioner schemes for traction substation so far contain a pair of costly and bulky step-up transformers.A transformerless compensator is proposed in this paper to balance the loads of traction supply arms.This novel compensator employs a neutral-pointclamped three-level three-leg converter based on series connected IGBTs.Dynamic voltage balance of IGBTs is carried out by a slope regulating and peak clamping way.And a virtual three-phase control strategy is designed for such a converter so that the compensator is capable of delivering bidirectional active power,providing reactive power for each supply arm and at the meanwhile maintaining dc-link voltage constant.Experimental results about dynamic voltage balancing and simulation waveforms about power conditioning are presented which validates this novel transformerless compensating solution.

关键词： Railway power conditioner:neutral-pointclamped converter :series connected IGBTs:dynamic voltage balance

作者: Chunpeng Zhang Yingdong Wei Qirong Jiang Luyuan Tong

作者单位: Department of Electrical Engineering,Tsinghua University Beijing,China,100084

会议类型: 国际会议

会议名称: 2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies(第四届电力设施管制、重建及能源技术国际会议 DRPT 2011)

会议地点: 威海

会议语种:英文

页码: 1490-1493

在线出版日期: 2011-07-06（万方平台首次上网日期，不代表论文的发表时间）