一起站用變損壞事件的原因分析和改進方案
歐俊延
(中國南方電網超高壓輸電公司柳州局，廣西 柳州 545006)
摘 要： 針對500 kV 南寧站35 kV #N1 站用變損壞的事故，分析了主變跳閘時低壓無功補償設備和站用變并列運行存在的問題。制定了主變聯跳低壓補償設備的二次回路改造實施原則，并給出了現場采用的二次回路改造實施方案。改造后主變跳閘同時將低壓無功補償設備和站用變隔離，保障了站用變的安全穩定運行。
關鍵詞： 站用變；電容器組；母線保護；主變保護
中圖分類號：TM411+.2 文獻標識碼：B 文章編號：1007-3175(2015)03-0044-03
Reasons Analysis and Improved Solution for an Event of Substation Transformers Damage
OU Jun-yan
（Liuzhou Electric Power Bureau, EHV Transmission Company, Liuzhou 545006, China）
Abstract: Considering the accident of the 35 kV N1 substation transformer in 500 kV Nanning, the paper presented the problem existed when the substation transformers and low-voltage reactive compensation equipments running in parallel and the main transformer was tripping at the same time. This paper constituted the principle of construction and implementation for the secondary circuit of the low-voltage reactive compensation equipments which tripping with the main transformer, and introduced the scheme of the construction for the secondary circuit in the field. After the completeness of construction, when the main transformer tripping, the low-voltage reactive compensation equipments and substation transformers shall simultaneously be isolated, which will guarantee the substation transformers operate safely and stably.
Key words: substation transformer; capacitor banks; busbar protection; main transformer protection
參考文獻
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[2] 種芝藝，黃杰，文繼鋒，等.華新換流站500 kV/10 kV站用變保護異常動作原因分析及改進方案[J].電網技術，2008，32(10)：98-100.
