摘要
煤矿使用的6 kV供电系统中,采用的接地方式主要是中性点大多不接地,少数连接电阻后接地,这种方式发生故障的概率较高,会对整个供电系统造成安全隐患。在漏电保护方法中,信号注入法由于其适应性强、性能稳定的特点在矿井供电系统中获得了较为广泛的应用。结合信号注入法优势的基础上,研究了一套新的煤矿6 kV供电系统漏电保护装置,可以实现自动检测接地故障的发生并且自动跳闸,具有较高的使用价值。
In the O K V electrical supply system useO m me corm mine, most ot me neutral points are unearthed, and some are earthed via high resistances. This technology has a high risk of faults. In leakage protection methods, the signal injection method is widely used because of its adaptability and stability. In this paper, we proposed a new 6 kV electrical supply system leakage protection system, which is base on the advantage of the signal injection method. This system can realize earth leakage detection and trip automatically. This system has high practical value.
出处
《煤矿机械》
北大核心
2014年第4期192-194,共3页
Coal Mine Machinery
关键词
小电流接地
信号注入法
漏电保护
non-solidly earth network
signal injection method
leakage protection
