一种大规模电网继电保护整定计算新思路

提出一种适用于大规模电网继电保护整定计算新思路,旨在提高计算效率。算法首先搜索全网一次模型结构,在目标区域数量和最少边界支路双重约束下,自动给出最佳分区结果;应用广度搜索算法形成各目标区域内部详细电网模型和相邻区域边界信息;将大规模电网分解成若干个子网进行整定计算。算法解决了大电网整定计算效率和超大规模矩阵存储难题,并提供边界支路间保护配合关系和准确的分支系数,在安徽省级电网的应用结果证实了算法的有效性。算法为大规模电网的继电保护整定计算提供一种解决方案,具有较强的推广应用价值。

New Method for Large Scale Power Grid Relay Protection Setting Calculation

In order to improve the efficiency , a new partitioning algorithm for large scale power grid relay protection setting calculation is proposed in the paper .Under the restriction of the objective area number and the least boundary branch , the method provides the optimal partitioning results based on the power system figure .Both the within detailed power grid model and area boundary information are gained by u-sing breadth-first algorithm , and then the several subset models are obtained .Finally the relay protection setting calculation is analyzed in the smaller power system figure .The technology overcomes both the cal-culation efficiency and the multi-dimension matrix problem for large power system setting calculation , and also offers the backup protection coordination relation between boundary branches and the exact branch coefficient .The application results on Anhui area power grid show its validity .Therefore as a partitioning method for large power grid setting calculation , it has high engineering value .