Abstract: A method for online limit early-warning to a shunt capacitor bank, and the method comprises: performing harmonic monitoring to the shunt capacitor bank; obtaining a measured voltage and a measured current, based on raw data obtained by the harmonic monitoring; obtaining a first parameter representing a ratio of the measured voltage to a rated voltage and a second parameter representing a ratio of the measured current to a rated current, based on the measured voltage and the measured current; obtaining a relation between an impedance correlation quantity of the shunt capacitor bank and a background harmonic voltage ratio, based on the first parameter, the second parameter, and an obtained series reactance ratio of a detected capacitor circuit; and performing online limit early-warning to the shunt capacitor bank, based on the relation. The present invention also discloses a device for online limit early-warning to a shunt capacitor bank.
Type:
Grant
Filed:
January 25, 2018
Date of Patent:
August 11, 2020
Assignee:
Wuxi Electric Power Company of State Grid Jiangsu Electric Power Corporation
Inventors:
Jun Wu, Juncheng Liu, Jun Zhu, Haiping Shen, Yuan Feng
Abstract: A method for online limit early-warning to a shunt capacitor bank, and the method comprises: performing harmonic monitoring to the shunt capacitor bank; obtaining a measured voltage and a measured current, based on raw data obtained by the harmonic monitoring; obtaining a first parameter representing a ratio of the measured voltage to a rated voltage and a second parameter representing a ratio of the measured current to a rated current, based on the measured voltage and the measured current; obtaining a relation between an impedance correlation quantity of the shunt capacitor bank and a background harmonic voltage ratio, based on the first parameter, the second parameter, and an obtained series reactance ratio of a detected capacitor circuit; and performing online limit early-warning to the shunt capacitor bank, based on the relation. The present invention also discloses a device for online limit early-warning to a shunt capacitor bank.
Type:
Application
Filed:
January 25, 2018
Publication date:
January 31, 2019
Applicants:
Wuxi Electric Power Company of State Grid Jiangsu Electric Power Corporation, Xi'an Boyuu Electric Co., Ltd
Inventors:
Jun WU, Juncheng LIU, Jun ZHU, Haiping SHEN, Yuan FENG