Measurement of Small PD-S in Compressed SF6(10%) - N2(90%) Gas Mixture

Partial Discharge measurement is a very important means of assessing the integrity of insulation systems in a High Voltage apparatus. In compressed gas insulation systems, floating particles can initiate partial discharge activities which adversely affect the working of insulation. Partial Discharges below the inception voltage also plays a crucial in damaging the integrity of insulation over a period of time. This paper discusses the effect of loose and fixed Copper and Nichrome wire particles on the PD characteristics in SF6-N2 (10:90) gas mixtures at a pressure of 0.4MPa. The Partial Discharge statistical parameters and their correlation to the observed results are discussed.

Authors:

• B. Rajesh Kamath
• J. Sundara Rajan

Keywords:

• Gas Insulated transmission Line
• Sulphur HexaFlouride
• metallic Particles
• Partial Discharge (PD)
• InceptionVoltage (Vi)
• Extinction Voltage (Ve)
• PD Statistical parameters.

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