AnalysisandDisposeofConverterTransformerOLTC125C.pdfVIP

Smart Grid 智能电网, 2013, 3, 22-27 /10.12677/sg.2013.31004 Published Online February 2013 (/journal/sg.html) Analysis and Dispose of Converter Transformer OLTC 125?C Blocking in Series Dual Groups of Yunnan-Guangdong ±800 kV DC Transmission Project 1 1 2 1 Canxu Chen , Maotao Liu , Zhichao Zhang , Shubo Song 1Guangzhou Bureau, EHV Power Transmission Company, China Southern Power Grid, Guangzhou 2EHV Power Transmission Company, China Southern Power Grid, Guangzhou Email: chencanxu@ Received: Dec. 27th th th , 2012; revised: Jan. 18 , 2013; accepted: Jan. 26 , 2013 Abstract: Yunnan-Guangdong ±800 kV DC transmission project is the first project which uses vacuum on-load tap- changer in all DC transmission projects of CSG. The paper introduces the operation of vacuum on-load tap-changer firstly, then summarizes and analyzes the cause of converter transformer OLTC 125?C blocking in Yunnan-Guangdong ±800 kV DC transmission project, and analyzes its risk thoroughly, at last, some effective measures which can depress the risk of blocking both pole in Yunnan-Guangdong ±800 kV DC transmission project are given. Keywords: UHVDC Project; OLTC of Converter Transformer; 125?C Blocking ±800 kV 云广直流输电系统串联双阀组换流变分接开关 125℃闭锁调整分析及处理 1 1 2 1 陈灿旭 ，刘茂涛 ，张志朝 ，宋述波 1 中国南方电网超高压输电公司广州局，广州 2 中国南方电网超高压输电公司，广州 Email: chencanxu@ 收稿日期：2012 年 12 月 27 日；修回日期：2013 年 1 月 18 日；录用日期：2013 年 1 月 26 日 摘 要：南方电网