井下高压电网保护定值仿真校验系统

井下高压供电系统中，不能通过在现场做短路实验判断保护定值是否满足选择性与可靠性要求，故本文提出了煤矿井下高压电网保护定值仿真校验系统，通过该系统模拟井下故障检验保护定值的选择性与可靠性。提出了井下高压电网保护定值仿真校验系统整体设计方案，基于广度优先搜索算法对井下供电系统进行拓扑自学习，以获取的拓扑模型为基础提出了故障电流计算方法和定时过流保护、瞬时速断保护、过负荷保护的仿真校验算法。实验结果表明，系统能够检验速断保护与定时过流保护配合是否合理，以及各段保护当前设置是否会造成停电面积扩大等问题，有效实现了井下高压供电系统继电保护定值的仿真检验。

Simulation and verification system of relay protection setting value in coal mine high voltage power network

In the coal mine high voltage power supply system, the protection setting value whether meets the selectivity and reliability cannot be determined by short circuit experiment in the field, so this paper propose the simulation test system of protection setting value in coal mine underground high voltage network, to simulate the selectivity and reliability of underground flaut detection protection setting value. The whole design scheme of simulation protection setting value in coal mine underground high voltage power network is introduced, breadth first search algorithm based topology self learning of coal mine underground supply systems is carried out, based on the obtained topology model, the simulation calibration algorithm of the fault current calculation, timing over current protection, transient speed circuit protection and overload protection is proposed. The experimental results show that the system can test whether the coordination between timing over current protection and transient speed circuit protection is reasonable, and whether the current settings of each segmental will cause blackout area expanding, and effectively realize the simulation test of underground high voltage power system relay protection setting.