Published by HSB, Power quality — basics Commercial property, One State Street P.O. Box 5024 Hartford, CT 06102-5024 Tel: (800) 472-1866. Website: HSB.com Introduction Power quality is a general term used to describe the compatibility between connected equipment and its electrical supply. The supply system can be affected by changes to the frequency or amplitudeContinue reading “Power Quality — Basics Commercial Buildings”
Tag Archives: Transients
Autotransformers for Power Systems
Published by Waldemar ZIOMEK, PTI Manitoba Inc., Winnipeg, MB, Canada Abstract. When the primary and secondary voltages are obtained from the same winding, or from two windings which are galvanically connected, such a transformer is called an autotransformer. The paper will focus on fundamentals, design and applications of autotransformers of core-type design. The selected problemsContinue reading “Autotransformers for Power Systems”
Electromagnetic Disturbances Propagation Along a Grounding Grid Subjected to Lightning Currents
Published by Rafael ALIPIO, Renan SEGANTINI, Federal Centre of Technological Education of Minas Gerais Abstract. This paper assesses the transient distribution of potentials along a grounding grid subjected to currents representative of first and subsequent strokes. It is shown that the transient non-uniform distribution of potential along the grounding system may lead to the flowContinue reading “Electromagnetic Disturbances Propagation Along a Grounding Grid Subjected to Lightning Currents”
Harmonics in Electrical Power Systems and how to remove them by using filters in ETAP
Published by Zia Hameed1, Muhammad Rafay Khan Sial2, Adnan Yousaf3, Muhammad Usman Hashmi,Faculty of Engineering and Technology, Superior University, 17-km off Raiwind Road Lahore PakistanEmails: zia.hameed@superior.edu.pk, rafay.khan@superior.edu.pk, adnan.yousaf@superior.edu.pk Abstract—Power System Harmonics is a real point of concern for Electrical Engineers. In power systems, non-linear loads are permanently connected, unlike transients and other distortions are produced.Continue reading “Harmonics in Electrical Power Systems and how to remove them by using filters in ETAP”
A Review of Power System Transient Stability Analysis and Assessment
Published by Huimin Wang1, and Zhaojun Li2,1School of mechanical and electrical engineering University of Electronic Science and Technology of China Chengdu, China. Email: hmwang1206@163.com2Department of Industrial Engineering and Engineering Management Western New England University, Springfield, MA, 01106. Email: zhaojun.li@wne.edu Abstract—The failure of power system transient stability is one of the main factors causing catastrophic accidentsContinue reading “A Review of Power System Transient Stability Analysis and Assessment”
Understanding the Interaction between Lightning and Power Transmission Lines
Published by Lorenzo Mari, EE Power – Technical Articles: Understanding the Interaction between Lightning and Power Transmission Lines, November 21, 2020. Learn about the impact lightning strikes have on transmission lines and proper grounding’s role in lowering the chances of irreversible damage to a power system. Lightning disturbances are usually a significant issue for transmissionContinue reading “Understanding the Interaction between Lightning and Power Transmission Lines”
Substation Protection Against Transient Overvoltages and Lightning Strikes
Published by Lorenzo Mari, EE Power – Technical Articles: Substation Protection Against Transient Overvoltages and Lightning Strikes, December 11, 2020. Learn how surge arresters protect power substations against lightning and switching overvoltages. Transient overvoltages are typical of power systems. The sources of overvoltages are direct or nearby lightning strikes, switching operations, electromagnetic pulses, and electrostatic discharges.Continue reading “Substation Protection Against Transient Overvoltages and Lightning Strikes”
Calculation of the Transient Currents in Transformers using Field-Circuits Methods
Published by Bronisław TOMCZUK, Dariusz KOTERAS, Jan ZIMON, Andrzej WAINDOK Opole University of Technology, Department of Industrial Electrical Engineering Abstract. The Field-Circuit Method (FCM) and the new Modified Time Stepping Finite Element Method (MTSF) as well as classical Time Stepping Finite Element Method (TSF) have been used for the transient current calculations in transformers. TheContinue reading “Calculation of the Transient Currents in Transformers using Field-Circuits Methods”
New Approach to Protecting Transformers Against High Frequency Transients – Wind Turbine Case Study
Published by Dariusz SMUGAŁA(1), Wojciech PIASECKI(1), Magdalena OSTROGÓRSKA(1), Marek FLORKOWSKI(1), Marek FULCZYK(2), Ole GRANHAUG(3), ABB Sp.z.o.o., Corporate Research Center, Cracow, Poland (1), ABB Oy, Medium Voltage Products, Vaasa, Finland (2), ABB AS, Medium Voltage Products, Skien, Norway (3) Abstract. Novel protection method of wind turbine transformers against high frequency transients occurring during switchgear operation isContinue reading “New Approach to Protecting Transformers Against High Frequency Transients – Wind Turbine Case Study”
Transient Performance of Interconnected Wind Turbine Grounding Systems
Published by Blagoja MARKOVSKI, Leonid GRCEV, Vesna ARNAUTOVSKI-TOSEVA, Marija KACARSKA,Ss. Cyril and Methodius University of Skopje, Faculty of Electrical Engineering and Information Technologies Abstract. We analyze the transient grounding characteristics of interconnected wind turbine grounding systems, for fast rising current pulses. By increasing the number of wind turbines, influences on harmonic impedance and transient potentialContinue reading “Transient Performance of Interconnected Wind Turbine Grounding Systems”
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