Solving customer power quality problems due to voltage magnification

Author

Adams, R.A. ; Middlekauff, S.W. ; Camm, E.H. ; McGee, J.A.

Author_Institution

Duke Power Co., Charlotte, NC, USA

Volume

13

Issue

4

fYear

1998

fDate

10/1/1998 12:00:00 AM

Firstpage

1515

Lastpage

1520

Abstract

Reports by a Duke Power customer concerning equipment malfunctioning coincident with the switching of a 100 kV shunt capacitor bank led to field measurements and EMTP simulations to identify the possible sources of the problems and to find an economical solution. Measurements and simulation revealed the occurrence of voltage magnification at the customer´s site due to the effects of three different distribution capacitor banks on the feeder supplying the customer. A comparative evaluation of commercially-available capacitor-switching transient mitigation switching devices suggested the use of low-resistance pre-insertion inductors applied with circuit switchers to energize the 100 kV capacitor bank. Field measurements of capacitor-switching events after installation of pre-insertion inductors verified the elimination of voltage magnification and customer power quality problems

Keywords

capacitor storage; digital simulation; distribution networks; power capacitors; power inductors; power supply quality; power system analysis computing; power system transients; switching; 100 kV; Duke Power customer; EMTP simulations; capacitor bank energisation; capacitor-switching transient mitigation switching devices; circuit switchers; customer power quality problems; distribution capacitor banks; field measurements; low-resistance pre-insertion inductors; pre-insertion inductors; shunt capacitor bank; voltage magnification; Capacitors; Circuit simulation; EMTP; Inductors; Power generation economics; Power measurement; Power quality; Shunt (electrical); Switching circuits; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.714840

Filename

714840