Single-phase earth fault judgment method and system based on clustering and LSTM

• Main Authors: LIU ZHENGYI, YING HUAMEI, DENG CHANGHONG
• Format: Patent
• Language: Chinese; English
• Published: 09.07.2021
• Subjects: CALCULATING; COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS; COMPUTING; COUNTING; HANDLING RECORD CARRIERS; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS; TESTING

The invention discloses a single-phase earth fault judgment method and system based on clustering and LSTM. The method comprises the steps of obtaining fault recording data of a power distribution network through a scheduling platform, employing the ratio of a harmonic wave to a fundamental wave after Fourier decomposition as a characteristic quantity, employing clustering analysis to distinguish fault data and non-fault data in the recording data, and discriminating a fault moment, establishing a low-current grounding fault line selection mode by using a multi-layer LSTM network to carry out fault judgment, so that fault line selection and fault moment judgment are completed. The method is suitable for a power distribution network of a distributed power supply, is simple and convenient to implement, is real-time and efficient, and can support automatic and intelligent line fault solving. 本发明公开了一种基于聚类和LSTM的单相接地故障判定方法及系统，通过调度平台得到配电网的故障录波数据，采用傅里叶分解后的谐波与基波的比值作为特征量，利用聚类分析区分录波数据中的故障数据与非故障数据，判别出故障时刻；利用多层LSTM网络建立小电流