Cooperative fault handling method of 220kV power system based on relay protection and automation

Abstract:
In order to avoid the influence of noise signal on the operation state of the power system, improve the fault recovery rate and improve the anti-interference, a collaborative fault handling method for 220kV power system based on relay protection and automation is proposed. The wavelet packet analysis method is used to de-noise the fault signal. According to the de-noising results, an information fusion strategy based on neural network is proposed to achieve fault diagnosis; the objective function and constraint conditions are established to achieve fault recovery; through multi-level differential protection and centralized fault processing Cooperate to complete the cooperative fault relay protection and automatic processing of 220kV power system. The experimental results show that the proposed method has a high recovery rate of fault handling, and the power system is more stable after being processed by this method.