大型变压器零起升压方法在孤网启动中的研究与应用  

Study and Application of Transformer Soft Charging Methods During Island Grid Energization

作　　者：刘星 LIU Xing(Dongfang Electric International Corporation,611731,Chengdu,China)

机构地区：[1]东方电气集团国际合作有限公司,成都611731

出　　处：《东方电气评论》2023年第1期63-66,共4页Dongfang Electric Review

摘　　要：在中、小型孤网系统中,电源往往是由许多分布式小型发电机组构成的,然而连接电源的电力变压器容量则可能较大,因此,在联网启动过程中,就会存在‘小马拉大车’的现象,这将对变压器的冲击启动和孤网系统稳定运行提出巨大挑战,如果方法选择不当,不仅无法完成联网过程,甚至会造成全部发电机组跳闸。本文通过研究电力变压器零起升压方法在孤网联网启动过程中的应用,探索适用于小型孤网系统联网启动的方法。In some medium and small island grid systems,the power sources are composed by lots of distributed small generators,however,the capacity of the power transformer for connecting the island grid may be large,it will lead to a small generator being designed to energize a large transformer,just like‘a small horse tracts a heavy truck’,and the result is that the energization of the transformer and grid stability will face a huge challenge.If the method of energization is not deployed properly,the complete energization process will fail,even the whole system may be blackout.In this article,a soft charging method for large transformers’energization in the island grid system is proposed,which aims to explore a method suitable for smooth energization of island grid system.

关 键 词：孤网启动 零起升压 

分 类 号：TM31[电气工程—电机]