Online identification of error overcurrent alerts of 500 kV high voltage shunt reactor based on data-driven
DOI:10.7667/PSPC180189
Key Words:high voltage shunt reactor  overcurrent alerts  principal components analysis (PCA)  logistic regression  measurement error  data driven
Author NameAffiliation
TENG Yufei State Grid Sichuan Electric Power Research Institute, Chengdu 610041, China 
FENG Shilin State Grid Sichuan Electric Power Research Institute, Chengdu 610041, China 
ZHANG Zhenyuan University of Electronic Science and Technology of China, Chengdu 611731, China 
HE Rui State Grid Sichuan Electric Power Company, Chengdu 610041, China 
WU Jie State Grid Sichuan Electric Power Research Institute, Chengdu 610041, China 
GAO Jian State Grid Sichuan Electric Power Company, Chengdu 610041, China 
LI Yi State Grid Sichuan Electric Power Company, Chengdu 610041, China 
ZHANG Hongtu State Grid Sichuan Electric Power Company, Chengdu 610041, China 
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Abstract:In order to increase the accuracy of the online monitoring of shunt reactor, an online identification method for false overcurrent alarm of 500 kV shunt reactor based on the logical regression and Principal Component Analysis (PCA) method is proposed. Firstly, the influences of measurement error of the transformers including the PT in the bus connected to shunt reactor and the CT in the reactor branch on the conditional probability of overcurrent alarms are analyzed. Then the central point and the uncertain domain of the logistic regression function are defined as the two-dimension key indicators for the detection of false alarms, and PCA method is used to generate the one-dimension comprehensive index. Finally, the validity of overcurrent alarm is judged by comparing the comprehensive index of the detection day with that under normal conditions. The proposed method only uses the RMS of voltage in the bus connected to shunt reactor and the overcurrent alarm information obtained from monitoring system, so no additional measurement equipment is needed. The effectiveness of the method is verified by case study of a practical 500 kV high voltage shunt reactor. This work is supported by Key Research and Development Program of Sichuan Department of Science and Technology (No. 2017GZ0163) and Science and Technology Program of State Grid Corporation of China (Technology Research of Supercomputer-based Power System Operation Mode Calculation Platform Support).
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