Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Development of a Method to Analyze Voltage Sag Monitoring Data

순간전압강하 모니터링 데이터 분석 방법

  • Park, Chang-Hyun (School of Electrical Engineering, Pukyong National University)
  • 박창현 (부경대학교 전기공학과)
  • Received : 2012.12.31
  • Accepted : 2013.02.18
  • Published : 2013.04.30
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Abstract

This paper presents a method to analyze the voltage sag data obtained from monitoring systems. In order to establish effective countermeasures against voltage sag problems, an assessment of the system performance with respect to voltage sags is needed. Generally, the average annual sag frequency can be estimated by using the recorded voltage sag events for several years. However, the simple average value can not give the information about the errors of estimation. Such an average estimation is not useful for establishing effective solutions for voltage sag problems. Therefore, this paper proposes an effective method based on the Interval Estimation method. The estimation of voltage sag frequency is performed by using the average frequency and Poisson probability model. The proposed method can give the expected annual sag frequency and upper one-sided bound frequency.

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References

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