Voltage dip detection and power system transients

Recently developed power quality mitigation equipment, like the static transfer switch, needs methods for fast and reliable detection of voltage dips. Such a detection scheme must be able to detect a voltage dip as fast as possible and be immune to other types of disturbances. In this paper, the authors address the problem of voltage dip detection regarding Kalman filtering, the characteristics of fault-induced voltage dips and other power system disturbances. They investigate how the voltage dip characteristics influence the speed of detection and show that disturbances other than fault-induced dips could trigger a detection scheme. Special attention is given to trans former-related events. Their characteristics are presented using measurements. Kalman filtering modelling issues are discussed. Statistics on the characteristics of fault-induced dips and transformer events are presented from medium voltage networks.

[1]  W. E. Carter,et al.  Application and experience with a 15 kV static transfer switch , 1999 .

[2]  Robert Grover Brown,et al.  Introduction to random signals and applied Kalman filtering : with MATLAB exercises and solutions , 1996 .

[3]  K. Matsushita,et al.  High speed switchgear protecting power generating facilities against voltage dip and interruption , 1995, Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95.

[4]  S. B. Dewan,et al.  Performance evaluation of thyristor based static transfer switch , 2000 .

[5]  R. Fischl,et al.  Prediction of distribution system disturbances , 1994, Proceedings of 1994 Power Electronics Specialist Conference - PESC'94.

[6]  Edward J. Powers,et al.  Characterization of distribution power quality events with Fourier and wavelet transforms , 2000 .

[7]  Edward J. Powers,et al.  New robust voltage sag disturbance detector using an adaptive prediction error filter , 1999, 1999 IEEE Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.99CH36364).

[8]  K. S. Smith,et al.  Analysis of transformer inrush transients in offshore electrical systems , 1999 .

[9]  Irene Yu-Hua Gu,et al.  Classification of power system events: voltage dips , 2000, Ninth International Conference on Harmonics and Quality of Power. Proceedings (Cat. No.00EX441).