基于稀疏矩阵的煤矿电网过流保护检验算法

为了避免矿井高压电网在实际运行过程中可能会出现越级跳闸或保护拒动现象，保证矿井高压电网供电安全，本文基于矿井高压供电网络特点，提出了一种基于稀疏矩阵的矿井高压电网过流保护检验算法，将稀疏矩阵和矿井高压过流保护检验算法相结合，获得支路节点和支路节点的供电关系矩阵，描述了故障电流计算方法，并以此为基础获得了最终需要执行跳闸操作的开关矩阵，对矿井高压供电系统图中相应开关执行跳闸操作。依据开关跳闸结果，即可判断出当前的过流保护设置是否合理。

Testing algorithm of overcurrent protection in coal mine high voltage grid based on sparse matrix

In order to avoid override trip or protection re‐closure in practical running process and ensure power supply safety of coal mine high‐voltage grid ,this paper gives a testing algorithm of overcurrent protection in coal mine high‐voltage grid based on sparse matrix ,it combines overcurrent protection testing algorithm and sparse matrix ,obtains power supply relationship matrix between branch nodes ,gives computing methods of fault current ,acquires final switch matrix that needs to execute trip operation ,and executes trip operation for corresponding switch in coal mine high‐voltage grid diagram .According to consequence of switch trip ,it can determine whether present overcurrent protection setting is reasonable or not .