Study on a New Method for Overvoltage Measurement using CVT

Published by Si WENRONG, Jin HENG, Huang HUA, Fu CHENZHAO, East China Electric Power Test & Research Institute Company Limited, Shanghai, China Abstract. This paper introduces a new method for overvoltage measurements in 500kV power system using capacitor voltage transformer (CVT). It is realized with a voltage sensor installed within CVT as the low-voltage capacitorContinue reading “Study on a New Method for Overvoltage Measurement using CVT”

The Trouble With Capacitors Part 2

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”

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”

Electrical System

Published by Bureau of Energy Efficiency Syllabus Electrical system: Electricity billing, Electrical load management and maximum demand control, Power factor improvement and its benefit, Selection and location of capacitors, Performance assessment of PF capacitors, Distribution and transformer losses. 1.1 Introduction to Electric Power Supply Systems Electric power supply system in a country comprises of generatingContinue reading “Electrical System”

General Reference – Utility Capacitor Switching

Published by Electrotek Concepts, Inc., PQSoft Case Study: General Reference – Utility Capacitor Switching, Document ID: PQS0302, 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 a utilityContinue reading “General Reference – Utility Capacitor Switching”

Distribution Transformers Protection Against High Frequency Switching Transients

Published by Dariusz SMUGAŁA1, Wojciech PIASECKI1, Magdalenia OSTROGORSKA1,Marek FLORKOWSKI1, Marek FULCZYK1, Paweł KŁYS2ABB Sp.z.o.o., Corporate Research Center, (1), ABB Sp.z.o.o., ABB Distribution Transformers, (2) Abstract. Distribution transformers protection method against high frequency transients generated during Vacuum Circuit Breaker (VCB) operations is presented in this paper. ATP/EMTP simulations of transients generated during the VCB operation andContinue reading “Distribution Transformers Protection Against High Frequency Switching Transients”

Effect of Synchronous Closing Control on Capacitor Energizing Transients

Published by Electrotek Concepts, Inc., PQSoft Case Study: Effect of Synchronous Closing Control on Capacitor Energizing Transients, Document ID: PQS0903, Date: October 15, 2009. Abstract: The application of utility capacitor banks has long been accepted as a necessary step in the efficient design of utility power systems. In addition, capacitor switching is generally considered a normalContinue reading “Effect of Synchronous Closing Control on Capacitor Energizing Transients”

Evaluation of Capacitor Bank Switch Restrikes

Published by Electrotek Concepts, Inc., PQSoft Case Study: Evaluation of Capacitor Bank Switch Restrikes, Document ID: PQS0606, Date: April 1, 2006. Abstract: The analysis of high voltage capacitor switching consists primarily of measurements and computer simulations. There are a number of important transient related concerns when transmission and distribution voltage level capacitor banks are applied, includingContinue reading “Evaluation of Capacitor Bank Switch Restrikes”

Harmonic Issues Related to Power Factor Correction

Published by Electrotek Concepts, Inc., PQSoft Case Study: Harmonic Issues Related to Power Factor Correction, Document ID: PQS0604, Date: April 1, 2006. Abstract: Power factor correction is an important facet of power quality. Capacitors may be installed on customer systems to minimize charges for poor power factor on their electric bill. These installations may create problemsContinue reading “Harmonic Issues Related to Power Factor Correction”

Power Factor Correction

Published by Electrotek Concepts, Inc., PQSoft Case Study: Power Factor Correction, Document ID: PQS0312, Date: April 16, 2003. Abstract: Low power factor because it means that you are using the facility’s electrical system inefficiently. It can also cause equipment overloads, low voltage conditions, and greater line losses. Most importantly, low power factor can increase totalContinue reading “Power Factor Correction”