The Transactions of the Korean Institute of Electrical Engineers P (전기학회논문지P)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on Insulation Property of VPI Type Generator Stator Winding Through the Case Analysis of Insulation Breakdown

절연파괴 사례분석을 통한 진공함침 방식 발전기 고정자권선의 절연특성 연구

  • Received : 2010.05.09
  • Accepted : 2010.06.18
  • Published : 2010.09.01
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Abstract

According to increase of combined cycle power generation, the manufacturing market of gas turbine generator has become more competitive, so there is high pressure on the manufacturer to reduce generator price. Global VPI(vacuum pressure impregnation) method is effective to save the production cost and time for manufacturing stator windings, but it has an abrasion problem by vibration between stator windings and slots. This paper presents the insulation breakdown case, which is for VPI type generator during high voltage insulation tests, and also shows the cause analysis, repair works as well as reliability test. the purpose of this paper is to understand the insulation properties of VPI type generator and to know prevention of insulation weakness.

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References

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