变电站二次设备继电保护回路隐性故障自动检测方法研究  

Research on Automatic Detection Method of Concealed Faults in Relay Protection Circuit of Secondary Equipment in Substation

作　　者：刘嘉伟 Liu Jiawei(State Grid Shanxi Electric Power Company Ultra-high Voltage Transmission Branch,Taiyuan,Shanxi,China,030000)

机构地区：[1]国网山西省电力公司超高压输电分公司,山西太原030000

出　　处：《仪器仪表用户》2024年第10期90-91,94,共3页Instrumentation

摘　　要：由于二次设备继电保护回路状态与多构件相关,导致对其存在的故障进行检测时,难以达到理想效果。为此,提出变电站二次设备继电保护回路隐性故障自动检测方法研究。结合继电保护二次回路中不同组成部分之间存在相互关联关系,通过建立适度函数的方式将原始的故障检测问题转化为目标函数的最优适应度函数计算问题,将继电保护二次回路的实际运行信息与期望值之间的相似度作为度量标准,确定继电保护二次回路故障关联域;在隐性故障检测阶段,在约束范围内求解适应度函数的最优值,作为最终的检测结果。测试结果表明,在该检测方法下,回路故障判据特征值的输出结果始终在0.12以上,最大值达到了0.22以上,能够有效反馈二次设备继电保护回路存在的隐形故障状态。Due to the correlation between the state of the relay protection circuit of secondary equipment and multiple components,it is difficult to achieve the desired effect when detecting its faults.Therefore,this article proposes a research on the automatic detection method for hidden faults in the relay protection circuit of secondary equipment in substations.By considering the interrelationship between different components in the secondary circuit of relay protection,the original fault detection problem is transformed into the calculation of the optimal fitness function of the objective function through the establishment of an appropriate function.The similarity between the actual operation information of the secondary circuit of relay protection and the expected value is used as the metric standard to determine the fault-related domain of the secondary circuit of relay protection.During the detection stage of hidden faults,the optimal value of the fitness function is solved within the constraint range as the final detection result.Test results show that under this detection method,the output value of the fault criterion characteristic value of the circuit is always above 0.12,with the maximum value exceeding 0.22,effectively reflecting the hidden fault status existing in the relay protection circuit of the secondary equipment.

关 键 词：二次设备 继电保护回路 隐性故障 自动检测 

分 类 号：TM73[电气工程—电力系统及自动化]