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Vol. 161, Issue 12, December 2013, pp. 318-322




A Novel Measurement Method of Capacitive Current of Power System
Xiao Yiping, Zhang Jie, Xi Zhiqiang, Wu Tiezhou

School of Electrical and Electronic Engineering, Hubei University of Technology, Lizhi Road, Wuchang District, Wuhan City, Hubei Province, 430068, China
E-mail: yp_xiao2013@163.com


Received: 16 September 2013   /Accepted: 22 November 2013   /Published: 30 December 2013

Digital Sensors and Sensor Sysstems


Abstract: When single-phase earth short-circuit fault in power system happened, large capacitance current will be created and it will damage the power system. Therefore, compensation would be needed to reduce capacitance current and decrease the damage to the power system. Complete compensation needs precise capacitance current value. A novel measurement method of capacitance current is put forward for distribution power systems. It injects current into neutral point of neutral non-grounding power system. Through measuring current and voltage, grid capacitance can be measured, then capacitance current can be calculated. This measurement method has advantage of easy operation, small relative error and high accuracy.


Keywords: Capacitance current, Measurement, Neutral point, Injecting current.


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