标题：Investigation of the Imbalance Current Compensation for Transformers Used in Electric Railways
作者：Dai, Chenxi; Sun, Yuanyuan
作者机构：[Dai, Chenxi] Zhejiang Univ, Coll Elect Engn, Hangzhou, Zhejiang, Peoples R China.; [Sun, Yuanyuan] Shandong Univ, Sch Elect Engn, Jinan, Peoples R 更多
会议名称：Asia-Pacific Power and Energy Engineering Conference (APPEEC)
会议日期：MAR 28-31, 2010
来源：2010 ASIA-PACIFIC POWER AND ENERGY ENGINEERING CONFERENCE (APPEEC)
关键词：Compensation capacity; Electric railway; Imbalance current;; Specially-connected transformers
摘要：Different transformer connections have different influences on the imbalance current introduced by the electric traction load. From transformers' symmetrical components matrices, the conditions under which there will be lest current injected into the primary windings of the transformer are studied. Capacitors or inductors can be installed to compensate the traction load to reach these conditions. Based on the deduced balance criteria, the compensation capacities for several specially connected transformers are researched. Analysis found out that for Scott transformer, Le-Blanc transformer and Modified Wood-bridge transformer, it is useful to install combination of inductors and capacitors on the secondary winding of transformers in order to reduce imbalance current.