基于残差决策的主网继电保护隐性故障检测

Hidden fault detection of relay protection in main network based on residual decision

随着电网规模的不断扩大,主网继电结构变得更加复杂,不同类型的隐性故障也频频发生。针对此问题,提出基于残差决策的主网继电保护隐性故障检测方法。通过采集故障数据的方式,生成既定继电残差值,借助主观决策条件,实现基于残差决策的主网继电隐性故障分析。在此基础上,设置DSP检测主板,结合小电流接地稳态条件,得到最终检测差动量数值,完成基于残差决策主网继电保护隐性故障检测方法的设计。实验结果表明,与叠加分析型检测方法相比,残差决策制度能够加快主网继电装置对于隐性故障的检测速率,从而促进检测结果不断贴合实际表现情况,较好地适应了电网规模的扩张需求,解决了隐性故障频发的问题。

With the continuous expansion of the power grid,the main network relay structure becomes more complex,and different types of hidden faults occur frequently.In order to solve this problem,a detection method based on residual decision is proposed.By collecting fault data,the given relay residual value is generated,and then with the help of subjective decision-making conditions,the main network relay hidden fault analysis based on residual decision-making is realized.On this basis,the DSP detection motherboard is set,combined with the steady-state condition of small current grounding,the final detection differential value is obtained,and the hidden fault detection method of main network relay protection based on residual decision is designed.The experimental results show that,compared with the superposition analysis detection method,the residual decision-making system can speed up the detection rate of the main network relay devices for hidden faults,so as to promote the detection results to fit the actual performance,better adapt to the expansion needs of the power grid scale,and solve the problem of frequent hidden faults.