High-voltage power supply systems in refining-petrochemical enterprises are complicated and operating under varied conditions,and the tuned value of the systems'relay protections often encounter abnormalities in actual operation,which consequently affects safe and stable operation of the system.Therefore this work made a preliminary attempt to modify the diagnostic method for relay protection tuned value abnormalities.First the operating data of the high-voltage power supply system was preprocessed,providing a good foundation for tuned value checking.Second by constructing a complete logic library and analyzing the situation of two key transformers in actual scenarios,the tuned value checking was achieved.Finally the design process was summarized,and the abnormality diagnosis of relay protection tuning was re-alized.The experimental results showed that the modified method was superior to selected reference in effectiveness and accuracy when diagnosing abnormal relay tuning.
关键词
异常诊断/继电保护/定值/高压供电系统/炼化企业
Key words
abnormality diagnosis/relay protection/tuned value/high-voltage power supply system/refining-petrochemical enterprise
维普
万方数据