Title :
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
fDate :
10/1/1998 12:00:00 AM
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;
Journal_Title :
Power Delivery, IEEE Transactions on
