±1100kV特高压直流系统试验技术分析

Analysis of ±1100 kV UHVDC System Commissioning Test Technology

简述准东—皖南±1 100 k V特高压直流输电示范工程在世界上具有输送容最大、电压等级最高、输送距离最远等优点,分析±1 100 k V直流工程系统试验需要研究内容以及需要完成的工作。借鉴±800 k V直流工程系统研究和现场系统试验的经验,结合±1 100 k V特高压直流输电工程的特点,对±1 100 k V特高压直流系统进行仿真计算分析研究,内容包括:±1 100 V特高压直流接入系统分析、系统稳定计算分析、过电压计算分析和直流控制保护计算分析。根据上述系统计算分析结果,提出系统安全稳定控制策略、过电压控制策略和直流系统控制保护策略。结合±1 100 k V直流工程受端高低端换流器分层接入系统的特点,提出±1 100 k V特高压直流输电工程系统试验方案。

The ±1 100 k V ultra high-voltage direct current(UHVDC) transmission pilot project located in the Zhundong of Xinjiang Province to the south of Anhui Province, with the advantages of highest transmission power, the highest voltage level and the longest distance of transmission power in the world, was briefly summarized. The study contents and work contents of ±1 100 k V UHVDC project system commissioning test were analyzed. According to ±800 k V UHVDC project system commissioning test study achievements and system test experiences on site, and combining with the features of ±1 100 k V UHVDC pilot project, the calculation analysis of ±1 100 k V UHVDC project system was carried out, which included system analysis of ±1 100 k V UHVDC project feeding in power system, system stability calculation analysis, over voltage calculation analysis and ±1 100 k V UHVDC control and protection simulation calculation. The system safety and stability control strategy, over voltage control strategy, ±1 100 k V UHVDC control and protection strategy were proposed based on system calculation results above description, which was to provide technical support for preparing ±1 100 k V UHVDC system commissioning test program by combining to the characteristics of ±1 100 k V UHVDC high/low voltage converter spilt connection with 500 k V/1 000 k V AC gird on inverter side.