基于电流量的有源配电网故障定位方法

Active distribution network fault location method based on current magnitude

随着世界能源结构布局的改变,传统配电网因分布式电源的接入变为多电源供电、潮流多变的复杂有源配电网络,导致传统的故障定位控制算法失效。因此,提出了基于电流量的有源配电网故障定位方法,通过有源配电网的不同类型节点上下游的电流量,依照各类节点所提出的改进判定方法来搜索故障流向,从而确定出有源配电网的故障关联区域,并通过PSCAD/EMTDC软件平台仿真含分布式电源的33节点配电网系统来验证文中方法的正确性与准确性,实现有源配电网相间短路故障的精确定位。

With the change of the energy structure, the traditional distribution network has become a complex active power distribution network with multiple power supplies and variable power flow due to the access of distributed power supply, which makes the traditional fault location control algorithm invalid. Therefore, a method for fault location of active distribution network based on current magnitude is proposed. Through the current magnitude of upstream and downstream of different types of nodes in the active distribution network, the fault flow direction is searched according to the new main and auxiliary criteria proposed by various nodes. The fault correlation area of the active distribution network is determined, and a 33-node distribution network system with distributed power supply is simulated by PSCAD/EMTDC software platform to verify the correctness and accuracy of the proposed method. The phase-to-phase short circuit of the active distribution network is simulated and precise positioning of the fault can be located.