Partial Discharge and Cross Interference Phenomena in a Three-phase Construction

Author :
  1. Umar Khayam, Kyushu Institute of Technology, Department of Electrical and Electronic, and Computer Engineering, 1-1 Sensui-cho, Tobata-ku, Kitakyushu
  2. Shinya Ohtsuka, Kyushu Institute of Technology, Department of Electrical and Electronic, and Computer Engineering, 1-1 Sensui-cho, Tobata-ku, Kitakyushu
  3. Satoshi Matsumoto, Kyushu Institute of Technology, Department of Electrical and Electronic, and Computer Engineering, 1-1 Sensui-cho, Tobata-ku, Kitakyushu,
  4. Masayuki Hikita, Kyushu Institute of Technology, Department of Electrical and Electronic, and Computer Engineering, 1-1 Sensui-cho, Tobata-ku, Kitakyushu,

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Abstract

This paper deals with partial discharge measurement and partial discharge
characteristics on a three-phase construction. A simplified model of three-phase gas insulated
switchgear is used in the experiment to simulate three-phase electric field in three-phase
equipment. A particle was adhered on the different positions on the conductor and on the tank
to produce partial discharge. Partial discharge signals flowing on three phase conductors were
measured simultaneously with three high frequency current transformers clamped on the threephase
lines through capacitive voltage divider. Partial discharge signals induced on the
enclosure were measured with the current transformer and the detecting impedance. The circuit
was calibrated and examined by injecting known charges from a pulse calibrator to some
points in the circuit. The calibration results indicate that measuring partial discharge signals
only at the enclosure or on one of the phases of three phase construction will result in the
position dependent sensitivity for partial discharges. Experimental results show that partial
discharge inception voltages of a particle adhered on different position differed depended on
the particle position. Phase of partial discharge inception voltage also depended on the particle
position. Experimental results show that partial discharge caused by a particle on one phase
conductor was induced and detected on the other phase conductors. Polarity and magnitude of
discharge current flowing on each phase depended on the particle position. Each particle at
different position generated discharge current which flowed on each phase so that the
magnitude ratios of the currents flowing on each phase were unique for each particle. These
results were discussed with considering electric field characteristic in three-phase construction
and coupling capacitance between three-phase conductors and between the conductors and the
tank.


Paper's Information

Publisher School of Electrical Engineering and Informatics Institut Teknologi Bandung
Index at 12 January 2016 2:11 a.m.
Source Type
Source Title INTERNATIONAL JOURNAL ON ELECTRICAL ENGINEERING AND INFORMATICS 78--91 pages. Vol. 1 Number.1
Cited 3 times
Keywords

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