A time-domain procedure for locating switched capacitors in power distribution systems

Author

Kim, Jiseong ; Grady, W. Mack ; Arapostathis, Ari ; Soward, John C. ; Bhatt, Sid C.

Author_Institution

Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA

Volume

17

Issue

4

fYear

2002

fDate

10/1/2002 12:00:00 AM

Firstpage

1044

Lastpage

1049

Abstract

This paper develops a method using transient voltage and current measurements at the substation to determine which capacitor in a multicapacitor feeder switched on to cause a measured transient. The procedure is based upon time-domain analysis where a backward Kalman filter estimates the initial voltage of all feeder capacitors, and those estimates indicate which capacitor switched. The result is an automated procedure that can help electric utilities determine if their capacitors are switching properly, and also help pinpoint the source of capacitor switching-related power-quality problems.

Keywords

Kalman filters; capacitor switching; distribution networks; power capacitors; power supply quality; power system parameter estimation; power system transients; substations; time-domain analysis; 25 kV; backward Kalman filter; discrete stochastic power system model; electric utilities; initial voltage estimation; multicapacitor feeder; power distribution systems; substation; switched capacitors location; time-domain analysis; time-domain procedure; transient; transient current measurements; transient voltage measurements; Noise measurement; Pollution measurement; Power capacitors; Power distribution; Power quality; Power system modeling; Substations; Time domain analysis; Vectors; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2002.805103

Filename

1046882