CAJ | 학술논문

换流站绝缘配合是±800kV特高压直流输电工程实施中的关键技术之一。基于向家坝-上海和云南-广东2项±800kV特高压直流输电工程，从平波电抗器分置和换流站避雷器配置2个角度分析了特高压直流换流站绝缘配合的特点。重点分析了平抗分置方式在特高压输电中的经济技术优势，指出平抗分置将是特高压换流站平波电抗器的首选布置方式。给出了2个换流站的避雷器布置方案，描述了各个避雷器的保护功能，最后分析了特高压工程采用并联避雷器对直流极线平波电抗器的端对端保护功能，以及2个工程对最高端YⅣ换流变阀侧所采用的不同保护方式的优缺点。
환류참절연배합시±800kV특고압직류수전공정실시중적관건기술지일。기우향가패-상해화운남-엄동2항±800kV특고압직류수전공정，종평파전항기분치화환류참피뢰기배치2개각도분석료특고압직류환류참절연배합적특점。중점분석료평항분치방식재특고압수전중적경제기술우세，지출평항분치장시특고압환류참평파전항기적수선포치방식。급출료2개환류참적피뢰기포치방안，묘술료각개피뢰기적보호공능，최후분석료특고압공정채용병련피뢰기대직류겁선평파전항기적단대단보호공능，이급2개공정대최고단YⅣ환류변벌측소채용적불동보호방식적우결점。
Insulation coordination of converter substation is one of key technologies in the implementation of ±800kV DC power transmission project. Based on two ±800kV DC power transmission projects being constructed in China, i.e., the DC power transmission project from Xiangjiaba to Shanghai and that from Yunnan to Guangdong, the features of insulation coordination for UHVDC converter substations are analyzed in the aspects of separate arrangement of split smoothing reactor and the configuration of lightning arresters. The economic and technical superiorities of the separate arrangement of split smoothing reactor in UHVDC power transmission are emphatically researched, and it is pointed out that the separate arrangement of split smoothing reactor will be the preferred arrangement of smoothing reactor in UHVAC converter stations. The arrangement of lightning arresters for above-mentioned two converter subsatations are given, and the protecting function of each arrester is described. Finally, the end-to-end protecting function of smoothing reactor connected with pole bus by parallel arresters, which is adopted in UHVAC projects, as well as the merits and defects of different protection modes adopted for at the valve side of wye-wye connected converter transformer in above-metioned two UHVDC proj ects are analyzed.