A Test System for Hidden Failure Based on Hybrid State Estimation

作者：Li, Zhongqing; Tian, Yuan^*; Liang, Chen; Hu, Yan; Gao, Xiang

来源：3rd International Conference on Mechatronics and Industrial Informatics (ICMII), China,Guangdong,Zhuhai, 2015-10-30 to 2015-10-31.

• power system management
• hidden failure
• state estimation
• static condition
• WAMS

Hidden failures in relay may cause invalidation of protection equipment so that system faults cannot be detected. These faults will lead to cascading outages in severe cases. At present, effective methods lack in monitoring hidden failures. A hybrid state estimation which uses system data collected from both SCADA and WAMS is proposed. The state value obtained from state estimation is regarded as reference value. The measurement value uploaded by protection information system is compared with reference value. If the difference exceeds default threshold value, hidden failure can be proved to exist in relay. A test system for hidden failure is established according to analysis above. This system can be used on the long-term, real-term, and on-line monitoring of relay. Example demonstrates that this system can be used to check the hidden failure in relay effectively.

• 出版日期2015
• 单位上海交通大学; 中国电力科学研究院