Title :
Some aspects of a digital method for the measurement of loss factor of high voltage insulation
Author :
Zhang, Zhengkao ; Raghuveer, M.R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Manitoba Univ., Winnipeg, Man., Canada
Abstract :
Periodic monitoring of the insulation condition of power system apparatus is necessary in order to estimate its deterioration and maintain the reliability of electric power supply. In this paper a digital technique for the on-line evaluation of loss factor is presented. The Discrete Fourier Transform is applied to the acquired voltage and current signals and the loss factor computed by consideration of the phase shift between the fundamental quantities of voltage and current. The effects of sampling rate, the number of measurements and system frequency fluctuation on the estimated value of loss factor are discussed
Keywords :
dielectric loss measurement; discrete Fourier transforms; insulation testing; current signal; digital measurement; discrete Fourier transform; electric power supply; high voltage insulation; loss factor; monitoring; on-line evaluation; phase shift; power system apparatus; reliability; sampling rate; system frequency fluctuation; voltage signal; Condition monitoring; Dielectrics and electrical insulation; Discrete Fourier transforms; Frequency estimation; Loss measurement; Maintenance; Power system measurements; Power system reliability; Umbilical cable; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1997. IEEE 1997 Annual Report., Conference on
Conference_Location :
Minneapolis, MN
Print_ISBN :
0-7803-3851-0
DOI :
10.1109/CEIDP.1997.634613
