Title :
Research on the inversion calculation method of overvoltage based on the nonlinear model of potential transformer
Author :
Yan, Lizhi ; Liang, Guishu ; Sun, Haifeng ; Liu, Xin ; Liu, Xixiao
Author_Institution :
Key Lab. of Power Equipments Defense of Hebei Province, North China Electr. Power Univ., Baoding, China
Abstract :
Monitoring overvoltage is essential to the power system´s operating well. Potential transformer is an important measuring instrument in power station. Because of the high amplitude of lightning overvoltage and switching overvoltage, the iron core of potential transformer reaches saturation in a very short time. The iron core shows nonlinear characteristic, so the distortion of secondary voltage and current happens. This article uses a nonlinear model of 10kV potential transformer to restore the primary voltage from the secondary voltage by the inversion calculation.
Keywords :
lightning protection; overvoltage protection; potential transformers; power stations; power system measurement; inversion calculation method; iron core; lightning overvoltage amplitude; nonlinear model; overvoltage monitoring; potential transformer; power station measuring instrument; switching overvoltage; voltage 10 kV; Iron; Lightning; Switches; Transformer cores; Voltage control; Voltage measurement; Voltage transformers; inversion calculation; nonlinearities; overvoltage; potential transformer;
Conference_Titel :
Lightning (APL), 2011 7th Asia-Pacific International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4577-1467-2
DOI :
10.1109/APL.2011.6110222
