特高压直流融冰方式控制策略及试验分析  

Analysis of Control Strategy and Test for De-Icing Operation Mode of UHVDC Project

作　　者：杨万开[1] 吴庆范 庞广恒[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]许继电气股份有限公司,河南省许昌市461000

出　　处：《电网技术》2015年第11期3313-3319,共7页Power System Technology

摘　　要：特高压直流输电工程融冰接线方式采用极I和极II高端换流器并联接线运行方式。向(家坝)—上(海)和锦(屏)—苏(南)?800 k V直流工程融冰基本控制方式采用并联混合式多端直流输电系统(multi-terminal direct current,MTDC)控制策略,溪(洛渡左岸)—浙(江金华)?800 k V直流工程采用并联换流器电流裕度控制策略。分析特高压直流工程融冰方式控制保护原理和向上、锦苏以及溪浙工程融冰方式系统试验结果,并对融冰接线方式系统试验过程中发现的稳态运行直流电流略大于设定值、直流电流不能稳定运行等问题进行论述和分析,揭示产生问题的原因,提出解决方案,并在向上特高压直流输电工程融冰方式系统试验过程中得到验证。De-icing connection of ultra high voltage DC（UHVDC） transmission project consists of Pole 1 and Pole 2 high-voltage converters in parallel connection. Hybrid parallel multi-terminal direct current（MTDC） control was used as de-icing mode control strategy for parallel converters of Xiangjiaba-Shanghai（abbr. XS） and Jinping-Sunan（abbr. JS） ？800 k V UHVDC projects, and current margin control was used as de-icing mode control strategy for parallel converters of Xiluodu Left bank to Jinhua of Zhejiang（abbr. XZ） ？800 k V UHVDC project. De-icing mode control and protective principles are analyzed in this paper. De-icing mode test results were analyzed during XS, JS and XZ UHVDC system commissioning tests. During de-icing tests, DC current steady state operation value was slightly larger than setting value, DC current could not be stable. These technical problems were discussed in detail and their causes were analyzed. Solutions of above problems were presented and testified in XS UHVDC transmission project de-icing mode test.

关 键 词：特高压直流输电工程 融冰方式 并联换流器控制策略 系统试验 问题分析 

分 类 号：TM72[电气工程—电力系统及自动化]