DocumentCode :
2585651
Title :
Estimation of the model parameters in equivalent circuit models of potential transformers
Author :
Bak-Jensen, B. ; Ostergaard, Leo
Author_Institution :
Inst. of Energy Technol., Aalborg Univ., Denmark
Volume :
2
fYear :
1999
fDate :
31 Jan-4 Feb 1999
Firstpage :
1053
Abstract :
In this paper equivalent circuit models of potential transformers with model parameters determined by three different estimation methods are set up. The objective is to compare the complexity and the accuracy of the three methods. The model parameters in the first model are determined by measurements of the open-circuit and short-circuit impedance as function of the frequency and by measurements of the voltage ratio at different loads. From the open-circuit impedance measured by a pseudo random binary sequence signal, the parameters in the second model are found. In the third model the parameters are determined from a frequency sweep of the open-circuit and short-circuit impedances. All three methods describe the frequency spectrum from 100 Hz to 1 MHz. The models and the methods to find the model parameters are compared and verified by measurements on a commercial potential transformer.
Keywords :
electric impedance measurement; equivalent circuits; parameter estimation; potential transformers; 100 Hz to 1 MHz; equivalent circuit models; frequency sweep; lumped parameter models; model parameters; model parameters estimation; open-circuit impedance measurement; parameter identification; potential transformer; potential transformers; pseudo random binary sequence signal; short-circuit impedance measurement; voltage ratio; Binary sequences; Circuit testing; Equivalent circuits; Frequency domain analysis; Frequency measurement; Impedance measurement; Predictive models; Resonance; Resonant frequency; Voltage transformers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Engineering Society 1999 Winter Meeting, IEEE
Print_ISBN :
0-7803-4893-1
Type :
conf
DOI :
10.1109/PESW.1999.747347
Filename :
747347
Link To Document :
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