摘要
分析了换流站二次设备接地的相关要求,认为保证二次设备良好接地,除了需尽量减小接地电阻外,还需设置专用的等电位接地网降低二次设备两接地点之间的电位差,并将电缆屏蔽层两端接在等电位接地网来有效抑制电磁干扰及其引起的过电压侵入二次设备。结合穗东换流站二次设备接地的实际情况,提出相关整改建议,给出全站等电位接地网联系图。
Analyzing the need of secondary equipment grounding, this paper concludes that for a good equipment grounding, the grounding resistance should be minimal, and some measures are also required such as to deploy a dedicated equipotential grounding network for reducing the potential difference between two grounding points of the equipment, and to connect the both ends of cable shield to the network for suppressing the electromagnetic interference and over-voltage invasion. For the actual case of Suidong Converter Station, certain suggestions to improve its grounding mode are given with an equipotential grounding network contact map of the whole station.
出处
《南方电网技术》
2010年第2期75-78,共4页
Southern Power System Technology
关键词
二次设备
接地
等电位接地网
屏蔽层
电磁干扰
secondary equipment
grounding
equipotential grounding network
shielding layer
electromagnetic interference
