三峡电站升压变压器的若干问题

Issues of the Step up Transformers for Three Gorges Power Plant

三峡电站升压变压器属于超高压特大型变压器，它的安全可靠性直接影响三峡电站的经济效益。本文根据国内外有关资料，分析了变压器发生内部故障和事故的原因，以及发生各种故障的统计概率。重点阐述了取消无励磁调压开关的必要性和经济性。同时根据三峡电站的特点。

The step up transformers for Three Gorges Project are EHV extra large transformers.Their reliability will affect the economic benefits of the project directly.Accroding to the related reference materials,the causes of the transformer interior failure and the probability of all kinds of failures are analyzed in this paper.Also the necessity and economic benefits of canceling off-circuit tap-changer are discussed.Considering the features of Three Gorges Project,suggestions on transformer cooling method and the necessity of installation of the generator circuit breaker (GCB) are raised.