基于网络分区的大电网故障限流器的优化布点方法

Abstract

故障限流器(FCL)可以快速地限制短路电流，保证系统安全稳定运行。本文提出一种故障限流器优化布点的新方法。首先将大电网分区等效处理，通过进行短路计算，得出每条支路的短路电流分布系数，根据短路电流分布系数的大小，从中选取安装FCL的位置，然后结合FCL的经济性确定安装的最佳位置。最后，通过某地区实际电网的仿真验证了所述方法的有效性，实现了FCL的优化布点，限制了超标短路电流水平。 The short-circuit current can be quickly limited by the fault current limiter (FCL) to ensure the system safe and stable. A new method for fault current limiter distribution optimization is pre-sented. Large-scale power grids are first equivalently treated to each partition and through short-circuit calculation, the distribution coefficients of short-circuit current of each branch are got. According to the value of distribution coefficients of short-circuit current, the location of the FCL can be selected. Then the optimum positions are determined combined with the economy of FCL. Finally, the validity of the method is proved through the simulation of a real regional power grid, optimal distribution of FCL is achieved and the excessive short-circuit current is limited.