Power distribution network single-phase earth fault section positioning method and system

• Main Authors: GAO WEI, GAO JIANHONG, HONG CUI, GUO MOUFA, YANG GENGJIE
• Format: Patent
• Language: Chinese; English
• Published: 05.01.2021
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a power distribution network single-phase earth fault section positioning method and system, and the method comprises the following steps: acquiring the zero-sequence currentof each detection node after the occurrence of a single-phase earth fault; conducting waveform splicing on the transient zero-sequence current of the last half cycle of the fault of each detection node, and constructing a splicing waveform representing a line section; and adopting the trained one-dimensional convolutional neural network to perform fault section positioning. According to the invention, a fault section and a non-fault section under various fault working conditions can be accurately positioned after a single-phase earth fault occurs. 本发明涉及一种配电网单相接地故障区段定位方法及系统，包括以下步骤：发生单相接地故障后，获取各检测节点的零序电流；对各检测节点的故障后半个周波暂态零序电流进行波形拼接，构造表征线路区段的拼接波形；采用训练好的的一维卷积神经网络进行故障区段定位。本发明能够在发生单相接地故障后准确定位各类故障工况下的故障区段和非故障区段。