改进的煤矿高压电网单相接地电容电流计算方法

Improved Coal High-voltage Power Capacitive Current Calculation Method

单相接地故障是影响煤矿高压电网安全供电的主要因素之一,当单相接地电容电流超过一定值时,必须对煤矿高压电网的单相接地电容电流进行准确的治理和补偿,因此,本文在分析煤矿高压电网电容电流理论准确计算基础上,提出了一种综合考虑电缆系数、天气系数及高压电器设备增值系数的改进的单相接地电容电流计算方法。最后,通过某煤矿实例计算验证了该改进计算方法的正确性。

Single-Phase-to-Ground fault is one of the main factors that affect high voltage power system security.When the capacitor current exceeds a certain value we have to take some measures to govern and compensate the capacitive currently.Therefore,the paper proposed a improved Single-Phase-to-Ground capacitance current calculation method which based on comprehensive consideration of cable factor,the weather factor and the high-voltage electrical equipment value-added factor.Finally,this paper verified the correctness of this improved method by a coal mine example calculation.