文章摘要
胡宇洋,余珊珊.葛南直流大地—金属回线转换实例分析[J].电力系统自动化,2017,41(23):150-155. DOI: 10.7500/AEPS20170323003.
HU Yuyang,YU Shanshan.Instance Analysis of Conversion Between Ground Return and Metallic Return in Gezhouba-Nanqiao HVDC Transmission System[J].Automation of Electric Power Systems,2017,41(23):150-155. DOI: 10.7500/AEPS20170323003.
葛南直流大地—金属回线转换实例分析
Instance Analysis of Conversion Between Ground Return and Metallic Return in Gezhouba-Nanqiao HVDC Transmission System
DOI:10.7500/AEPS20170323003
关键词: 高压直流输电  大地回线  金属回线  直流转换开关  避雷器
KeyWords: high voltage direct current(HVDC)transmission  ground return(GR)  metallic return(MR)  direct current(DC)transfer switch  surge arrester
上网日期:2017-08-15
基金项目:
作者单位E-mail
胡宇洋 国网湖北省电力公司检修公司, 湖北省宜昌市 443005 universe_hu@163.com 
余珊珊 国网湖北省电力公司检修公司, 湖北省宜昌市 443005  
摘要:
      高压直流输电系统中,直流转换开关的运行状况直接影响到单极大地—金属回线转换操作的顺利进行。通过对葛洲坝—南桥直流输电系统中发生的一起大地—金属回线异常转换过程的深入分析,得出由于金属返回线路上过高的感应电压造成直流转换开关振荡回路中相关元件损坏,导致该转换开关保护动作和转换操作失败。根据分析结果,提出了针对本次失败转换过程的改进措施和运行建议,可为新建工程设计和运行维护提供参考。
Abstract:
      In high voltage direct current(HVDC)transmission systems, the status of direct current(DC)transfer switch will influence the conversion of monopole from ground return(GR)to metallic return(MR). By analyzing an abnormal conversion process in Gezhouba-Nanqiao HVDC transmission system, this paper draws a conclusion that too high an induced voltage that occurred in the transmission line did damage to relevant components in the oscillation circuit of DC transfer switch. This leads to the operation failure of transfer switch protection and conversion. In light of the test results, some improvement measures and operation suggestions for this fault operation case are put forward as reference for people in design, operation and maintenance of HVDC transmission systems.
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