基于长短期记忆网络的继电保护测试故障诊断研究

为提高智能变电站继电保护测试效率,解决数字式继电保护试验装置无法对整个测试过程中出现的故障自动进行诊断的问题,提出基于长短期记忆(Long Short-Term Memory,LSTM)网络的继电保护测试故障诊断方法.梳理了故障断面特征信息和故障类别,建立了多故障诊断模型,构建了故障诊断流程.以典型220 kV继电保护...

Fault diagnosis of a relay protection test based on a long short-term memory network

The efficiency of intelligent substation relay protection test needs improvement. There is also a problem in that a digital relay protection test device cannot automatically diagnose faults during the whole test process. Thus a relay protection test fault diagnosis method based on long short-term memory (LSTM) network is proposed. In this paper, the fault section characteristic information and fault categories are first established. Then a multi-fault diagnosis model is established, and a fault diagnosis process is constructed. Taking the typical 220 kV relay protection test as an example, by comparing LSTM with cyclic neural, a BP and a deep neural networks, the three evaluation criteria (mean absolute error, accuracy and comprehensive evaluation index) of the LSTM model are found to be optimal when the actual fault information and partial unreliable information are two different inputs. Simulation results show that the relay protection test fault diagnosis method based on the LSTM network has high precision and good fault-tolerant performance. This work is supported by the National Natural Science Foundation of China (No. 11872069).