一种基于小波的继电保护启动元件性能监测方法

A method for performance monitoring of relay starting element based on wavelet transform

启动元件的选择以及起动门槛值的大小直接影响到整套继电保护装置的性能,而目前尚未对继电保护装置的启动元件性能进行自动在线分析评价。提出了一种基于故障录波数据和小波变换的继电保护装置起动性能监测方法,通过利用故障录波数据和继电保护信息实现对继电保护装置启动元件性能的监测。应用该方法能够对继电保护装置启动元件性能是否满足预定指标进行监测,对于完整评价继电保护性能、发现隐藏故障、积累整定数据具有参考价值。仿真分析验证了此方法的合理性。

The selection of starting elements and the threshold value for starting affects the performance of whole relay protection equipment directly ,however ,there is no on-line method presently to analyze and evaluate the performance of starting elements in relay protection devices automatically .This paper brings forward an on-line method for monitoring performance of starting elements in relay devices, which is based on fault recorder data and wavelet transform.With the fault recorder data and the relay information, we could monitor the performance of starting elements in relay devices.The method could detect if the performance of starting elements in relay devices have reached the required guidelines, also it is of reference value for evaluating relay performance completely,discovering hidden failure in relay system and accumulating setting data .The simulation results verify the rationality of this method.