含DG配电网分层分区协同故障定位隔离技术

高密度分布式电源并网使配电网故障状况复杂,故障定位困难。针对含高密度分布式电源馈线自动化故障定位与隔离技术,构建了基于分布式智能馈线自动化系统的故障定位方案。分析了含DG配电网区域性故障判别方式,引入区域电流代数和变化作为故障区域定位的基本判据,提出了依据电流相角突变的保护判据。以19节点网络仿真模型对上述方案进行验证,此方案可快速实现故障定位与故障隔离,对高密度分布式电源的接入具有良好的适应性。

Hierarchical zoning collaborative fault location and isolation technology for distribution networks containing DG

High density distributed power supply complicates the fault current of distribution network, and makes fault location difficult. In this paper, a fault location scheme based on distributed intelligent feeder automation is proposed to locate and isolate feeder automation fault. The regional fault identification methods for distribution networks with DG is analyzed, the regional current algebra and variation are introduced as the basic criteria for fault location, and the protection criteria based on the sudden change of current phase are proposed. Finally, the proposed scheme is verified by a 19-node network simulation model, which shows that this scheme can realize fault location and isolation quickly and has good adaptability to the access of high-density distributed power supply. This work is supported by National Natural Science Foundation of China (No. 51777121).