高瓦斯矿井高压电网漏电选线技术的应用研究

Application Research on Electricity Leakage Line Selection Technology of High Voltage Power Grid at High Gas Concentration Mine

煤矿高压供电系统均采用中性点非接地方式,在间歇性弧光接地极易造成相间短路。传统的接地故障排除方法,其选线保护准确率低,经常致使矿井停电范围广,停电时间长,容易造成高瓦斯矿井的瓦斯聚集。为避免高压供电系统单相接地故障造成的安全影响,采用高速信号处理器为核心,研究设计了一种高瓦斯矿井高压电网中性点非接地漏电故障选线装置。重点介绍漏电选线装置的硬软件结构,选线原理,建立供电线路Π模型。通过参数计算,对电网正常运行参数与漏电故障参数进行差异判据,对漏电线路进行选线并微机报警。该选线装置经亭南煤矿实际运行证明,选线快速、准确性高,提高了高瓦斯矿井高压电网的安全供电能力。

The coal mine high voltage power system all adopts neural non-grounding ways, resulting in the phase short-circuit by intermittent arc grounding. The traditional grounding fault exclude method has low accuracy on line selection, which always causes the wide and long power off at coal mine. It easily leads to high gas concentration at high voltage coal mine. In order to avoid the safety influence of high voltage power system single phase grounding faults, uses the high speed signal processor as the core, and designs one neural non-grounding electricity leakage fault line selection devices of high voltage power grid at high gas mine. Introduces the hardware and software＇ s structures of electricity leakage devices, the line selection principles and sets up the IT model of power lines. Through the parameters＇ calculation, leakage faults parameters, selects the by Tingnan coal mine, it can quickly voltage power grid at high gas mine. judges the differences of normal operation parameters of power grid and the leakage lines and alarms by computers. This line selection device is proved and accurately select the lines and improve the safety power capability of high