含分布式电源配电网故障区段定位的线性整数规划方法

Fault Section Location Method for DG-DNs Based on Integer Linear Programming

分布式电源接入配电网造成故障过流方向不唯一,导致传统的故障区段定位方法不再适用。针对含分布式电源配电网的故障区段定位问题,构建了基于非逻辑运算的开关函数,针对智能算法易陷入局部最优或收敛过快的不足,提出了含分布式电源配电网故障区段定位的线性规划模型和求解方法。所提方法可适应多个分布式电源投切和联络开关的开断变化,且具有一定的容错性能。仿真结果表明,所提故障区段定位方法定位准确可靠,适用于含分布式电源的大型配电网。相比于智能算法求解速度快,数值稳定性好,避免了收敛过快和陷入局部最优的问题。

As distributed generation（DG） in distribution networks changes characteristics of fault current, traditional fault section location method of distribution networks is no longer applicable. Aiming at the fault section location problem of distribution networks with DG（DG-DNs）, a switch function based on non-logical operations is constructed. To avoid the disadvantages of intelligent algorithms falling into local optimum or converging too quickly, linear programming model and fault section location method for DG-DNs are proposed. The proposed method can adapt change of DG connection status and switch status of contact switch with high fault tolerance. Simulation results indicate that the proposed fault section location method is accurate, reliable and suitable for complex DG-DNs with advantage of high speed and good numerical stability, avoiding the problems of too fast convergence and local optimization of intelligent algorithms.