基于保信主站的双重化配置继电保护装置录波同源比对研究

Research on recording homology comparison of relay protection devices with dual configuration based on protection information management master station

针对电力系统继电保护装置在正常运行工况下仍存在电流互感器中性线开路、相线断线、接线端子松动等不易判别的模拟量回路异常问题,本文提出基于保信主站对同一间隔双重化配置保护装置录波进行同源比对,以校验保护装置采样回路的准确性和可靠性。保信主站自动从子站采集录波简报,实时捕获双重化配置保护装置的录波文件进行比对分析,设置轻度异常和严重异常两级门槛定值,当波形比对特征值满足预设异常判据时,通过主站Web界面显示告警;Web界面支持自定义离线比对,便于问题追溯和排查。实例分析验证了同源比对策略的有效性,表明了其工程应用价值。

In view of the abnormal problems of analog circuits which are not easy to distinguish,such as open circuit of current transformer neutral line,broken phase line,loose terminal and so on,in the relay protection device in the power system under normal operation conditions,this paper proposes to carry out homologous comparison on the recording of dual configuration protection devices at the same bay based on the master station of relay protection information management system,so as to verify the accuracy and reliability of sampling circuit of protection device.The master station of the relay protection information management system automatically collects wave recording reports from the substation,captures the wave recording files of the dual configuration protection devices in real time for comparison and analysis,sets the two-level threshold setting of mild anomaly and serious anomaly,and displays the alarm through the Web interface of the master station when the waveform comparison characteristic value meets the preset anomaly criterion.The Web interface supports customized offline comparison to facilitate problem tracing and troubleshooting.The example analy-sis verifies the effectiveness of the homology comparison strategy and reflects its engineering appli-cation value.