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Output Voltage Characteristics of HVDC Electric Field Mill Sensor for Different Speed Variables of Rotating Electrode

  • Kim, Young Sun (Dept. of Electrical and Electronic Engineering, Joongbu University) ;
  • Park, Jae Jun (Dept. of Electrical and Electronic Engineering, Joongbu University)
  • Received : 2017.01.30
  • Accepted : 2017.03.10
  • Published : 2017.09.01

Abstract

This paper explains the effects of the weak signal of a rotating-type electric field mill sensor fabricated for measuring the intensity of the electric field generated by high-voltage direct current (HVDC) power transmission lines. The fabricated field mill consists of two isolated electrode vanes, a motor driver, and a ground part. The sensor plate is exposed to and shielded from the electric field by means of a rotary shutter consisting of a motor-driven mechanically complementary rotor/stator pair. When the uncharged sensor plate is exposed to an electric field, it becomes charged. The rotating electrode consists of several conductive vanes and is connected to the ground part, so that it is shielded. Determining the appropriate design variables such as the speed of the vane, its shape, and the distance between the two electrodes, is essential for ensuring optimal performance. By varying the speed, the weak signal characteristics which is used to signal processing and calibration experiment are quite different. Each weak signal pattern was analyzed along with the output voltage characteristics, in order to be able to determine the intensity of the electric field generated by HVDC power transmission lines with accuracy.

Keywords

Field mill;HVDC;Rotating electrode;Power transmission line;Signal processing

Acknowledgement

Supported by : Korea Electric Power Corporation

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