Published by R. Fehr, P.E., Engineering Consultant, Jan 1, 2004 Here’s how to reduce the effect of capacitor switching on your power system Last month’s article discussed exactly what happens when electric utilities switch shunt capacitors: power system components are exposed to transient voltages and currents produced by energizing and de-energizing these devices. Those transientsContinue reading “The Trouble With Capacitors Part 2”
Tag Archives: Decaying Ringwave (Power Factor Capacitor Tripping)
The Trouble With Capacitors Part 1
Published by R. Fehr, P.E., Engineering Consultant, Dec 1, 2003 Although shunt capacitors offer several advantages at all voltage levels, those advantages come at a price. Not only must you purchase, install, and maintain capacitor equipment, you must be able to switch it in and out of service to get the most from the system.Continue reading “The Trouble With Capacitors Part 1”
Utility Capacitor Switching Trips Electronic Voltage Regulator
Published by Electrotek Concepts, Inc., PQSoft Case Study: Utility Capacitor Switching Trips Electronic Voltage Regulator, Document ID: PQS0301, Date: January 10, 2003. Abstract: The application of utility capacitor banks has long been accepted as a necessary step in the efficient design of utility power systems. Also, capacitor switching is generally considered a normal operation for aContinue reading “Utility Capacitor Switching Trips Electronic Voltage Regulator”
Utility Capacitor Switching Fails VAX Disk Drive
Published by Electrotek Concepts, Inc., PQSoft Case Study: Utility Capacitor Switching Fails VAX Disk Drive, Document ID: PQS0408, Date: September 30, 2004. Abstract: The application of utility capacitor banks has long been accepted as a necessary step in the efficient design of utility power systems. Also, capacitor switching is generally considered a normal operation for aContinue reading “Utility Capacitor Switching Fails VAX Disk Drive”
Utility Capacitor Switching Causes Nuisance Tripping of ASD
Published by Electrotek Concepts, Inc., PQSoft Case Study: Utility Capacitor Switching Causes Nuisance Tripping of ASD, Document ID: PQS0319, Date: July 18, 2003. Abstract: The application of utility capacitor banks has long been accepted as a necessary step in the efficient design of utility power systems. Also, capacitor switching is generally considered a normal operation forContinue reading “Utility Capacitor Switching Causes Nuisance Tripping of ASD”
Transient Voltages at an Industrial Facility Capacitor Switching
Published by Electrotek Concepts, Inc., PQSoft Case Study: Transient Voltages at an Industrial Facility Capacitor Switching, Document ID: PQS0505, Date: June 30, 2005. Abstract: This case study describes concerns for capacitor switching transients within customer facilities. Magnification of transients initiated at higher voltage capacitors and tripping of sensitive variable frequency drive (VFD) loads are evaluated inContinue reading “Transient Voltages at an Industrial Facility Capacitor Switching”
Phase-to-Phase Transients at Transformer Terminations During Utility Capacitor Switching
Published by Electrotek Concepts, Inc., PQSoft Case Study: Phase-to-Phase Transients at Transformer Terminations During Utility Capacitor Switching, Document ID: PQS0603, Date: January 1, 2006. Abstract: There are a number of important transient related concerns when transmission capacitor banks are applied. These concerns include insulation withstand level, switchgear capabilities, energy duties of protective devices, and system harmonicContinue reading “Phase-to-Phase Transients at Transformer Terminations During Utility Capacitor Switching”
Impact of Capacitor Bank Outrush Reactors on Circuit Breaker Transient Recovery Voltages
Published by Electrotek Concepts, Inc., PQSoft Case Study: Impact of Capacitor Bank Outrush Reactors on Circuit Breaker Transient Recovery Voltages, Document ID: PQS0906, Date: October 15, 2009. Abstract: Current limiting outrush reactors are often installed with utility transmission capacitor banks. These reactors limit the high-magnitude, high-frequency currents that flow when the capacitor bank discharges into aContinue reading “Impact of Capacitor Bank Outrush Reactors on Circuit Breaker Transient Recovery Voltages”
Nuisance Tripping of Sensitive Customer Power Electronic Equipment
Published by Electrotek Concepts, Inc., PQSoft Case Study: Nuisance Tripping of Sensitive Customer Power Electronic Equipment, Document ID: PQS1011, Date: October 15, 2010. Abstract: This case study presents an investigation of nuisance tripping of sensitive customer power-electronic equipment during utility capacitor bank switching. The simulations for the analysis were completed using the PSCAD program. The powerContinue reading “Nuisance Tripping of Sensitive Customer Power Electronic Equipment”
General Reference – Utility Capacitor Switching – Common Waveforms
Published by Electrotek Concepts, Inc., PQSoft Case Study: General Reference – Utility Capacitor Switching – Common Waveforms, Document ID: PQS0707, Date: January 1, 2007. Abstract: The application of utility capacitor banks has long been accepted as a necessary step in the efficient design of utility power systems. Also, capacitor switching is generally considered a normal operationContinue reading “General Reference – Utility Capacitor Switching – Common Waveforms”
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