基于零序阻抗模型故障特征的含分布式电源配电网故障区间定位方法

电力系统配电网的故障区间定位是故障精确测距的基础,其研究对尽快恢复供电及减少停电经济损失具有重要作用。分布式电源(DG)的引入增加了故障区间定位的难度,为此提出一种基于电源端测量数据的含DG配电网故障区间定位新算法。该方法在含DG配电网零序阻抗模型的基础上,根据故障点的故障特征搜索故障支路关联节点,定位故障区间。算例仿真结果表明所提出方法具有区间定位准确度高、鲁棒性强和计算速度快的优点。

Fault Section Locating Method Based on Zero Sequence Impedance Model Fault Feature in Distribution Network with Distributed Generators

Fault section locating is the basis of accurate fault location in distribution networks, and plays an important role in restoring power supply and reducing economic loss. The introduction of distributed generation (DG) increases the difficulty of fault section locating. Therefore, this paper proposes a new algorithm for fault location in distribution network with DG based on measurement data of the power end. On the basis of zero sequence impedance models of the distribution network with DG, this method searches the fault associated nodes to locate the fault section according to the characteristics of fault features at fault points. Simulation results show that the proposed method has advantages of high accuracy, strong robustness and fast calculation speed.