大功率低压IT系统绝缘监测技术研究
대공솔저압IT계통절연감측기술연구
Research on Insulation Monitoring of High-Power Low-Voltage IT System
  • 万方数据
    电工电气 전공전기
    ELECTROTECHNICS ELECTRIC
    2013年 1期 42-45 ,共4页

    杨涛%王金全%王巍%宋鹏超%李乾

    양도%왕금전%왕외%송붕초%리건

    大功率IT系统%绝缘监测%多并联电缆%选线 大功率IT繫統%絕緣鑑測%多併聯電纜%選線
    대공솔IT계통%절연감측%다병련전람%선선
    high-power IT system%insulation monitoring%multi-parallel power cable%circuit selection
    研究了大功率低压IT系统多并联电缆供电的特点,分析了其绝缘监测的难点,提出了一种基于外加信号的综合绝缘故障监测方法.该方法可实时监测系统内相线及中性线的绝缘电阻值,当绝缘电阻值低于设定阈值(通常为50 kΩ)时可报警;同时也可以对多并联电缆进行选线,指示故障相.试验结果表明,该方法具有较高的可靠性和测量精度.
    연구료대공솔저압IT계통다병련전람공전적특점,분석료기절연감측적난점,제출료일충기우외가신호적종합절연고장감측방법.해방법가실시감측계통내상선급중성선적절연전조치,당절연전조치저우설정역치(통상위50 kΩ)시가보경;동시야가이대다병련전람진행선선,지시고장상.시험결과표명,해방법구유교고적가고성화측량정도.
    This paper studied the characteristics of high-power low-voltage IT system with multi-parallel power cables, as well as the difficulties of insulation monitoring. This paper presented a comprehensive insulation monitoring method based on additional sig-nal. The method could monitor the insulation resistance of system’s phase wire and neutral wire in real time, giving an alarm once the insulation resistance decreased to the threshold (normally 50 kΩ). In addition, this method could select the fault circuit from multi-parallel power cables, indicating the fault phase. Experiments show that the method has high security and precision.
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