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전압 불평형에서 콘덴서와 리액터의 직렬 연결시의 콘덴서의 특성 분석

A Study on Condenser Characteristics at the Series Connection of Condenser and Reactor Under Voltage Unbalance

  • 김일중 (호서대학교 기계공학과) ;
  • 김종겸 (강릉원주대학교 전기공학과) ;
  • 박영진 (강릉원주대학교 전기공학과) ;
  • 김성헌 (공주대학교 제어계측공학과)
  • 투고 : 2010.05.24
  • 심사 : 2010.07.07
  • 발행 : 2010.09.01

초록

Capacitor has been used principally for the power factor compensation long ago. However now it does as passive filter to reduce harmonics of nonlinear load with reactor. Most of the customer's low-voltage feeder has been designed with approximately balanced and connected at the 3 phase four wire system. But voltage and current unbalance is appeared by the mixing operation of single or three phase load etc. The addition of reactor at the condenser may rise its terminal voltage. Voltage and current values above rating can act on electrical stress on the condenser. In this paper, we calculated and measured that voltage, current and capacity of condenser are changed under the voltage balance. We conclude that magnitude and deviation of phase voltage act on major point of electrical stress.

키워드

참고문헌

  1. Ramasamy Natarajan, "Power System Capacitors", Taylor & Francis, 2005
  2. 김종겸외 2인, "불평형 전압 동작시 전력 콘덴서 특성 분석", 조명전기설비학회 논문지, Vol.22, No.5, pp.64-72, 2008. 05
  3. 김종겸, 박영진, "비대칭 전압 불평형에 의한 콘덴서 동작 특성", 대한전기학회 논문지 제 59(P)권, No.1, pp.18-23, 2010.3
  4. 김일중, 김종겸, "불평형 전압 운전시의 역률 보상용 콘덴서 특성 연구", 대한전기학회 논문지 제 57(P)권, No.1, pp.36-40, 2008.3
  5. Thomas M. Blooming, "Capacitor Application Issues", IEEE Trans on IAS, Jul-Aug, pp.1013-1026, 2008
  6. IEEE Std 18-2002, "IEEE Std For Shunt Power Capacitors"
  7. JIS C-4902, "고압 및 특별고압 진상 콘덴서 및 부속기기", 1998