基于感应滤波的继电保护装置失效自动检测方法

Automatic Failure Detection Method of Relay Protection Device Based on Inductive Filtering

为解决传统继电保护自动检测精度较低,无法精确反映感应滤波装置失效实时运行工况的稳定干扰水平,制约电力机组与装置失效协同发展的问题,本文在传统自动检测方法的基础上,引入先进的科学技术进行了优化设计,提出了一种新的继电保护自动检测方法。首先,分析感应滤波装置失效响应特征,获取装置失效随机响应信号特征;其次,采用装置失效解析方法,对实时工况下继电保护参数的特征进行全方位解析;最后,依据潮流熵原理,获取继电保护参数的潮流分布情况,进而实现继电保护自动检测的目标。由实验分析可知,与传统方法相比,新继电保护自动检测方法提取到的参数阻尼比均值及标准差更加接近参考值,偏差较小,具有较高的可行性。

In order to solve the problem that the traditional automatic detection accuracy of relay protection is low,it cannot accurately reflect the stable interference level of the real-time operation condition of the induction filter device,which restricts the coordinated development of power unit and device failure,this paper introduces advanced scientific technology and optimizes the design based on traditional automatic detection methods,and proposes a new relay protection automatic detection method.Firstly,the failure response characteristics of the induction filter device are analyzed,and the random response signal characteristics of the device failure are obtained.Secondly,the device failure analysis method is used to comprehensively analyze the characteristics of relay protection parameters under real-time working conditions.Finally,according to the principle of power flow entropy,the power flow distribution of relay protection parameters is obtained,and then the goal of automatic detection of relay protection is realized.Experimental analysis shows that compared with the traditional method,the new automatic detection method of relay protection is closer to the reference value than the mean and standard deviation of the extracted parameter damping ratio,and the deviation is small,which has high feasibility.