Published by Alex Roderick, EE Power – Technical Articles: Five Ways to Reduce Harmonics in Circuits and Power Distribution Systems, May 24, 2021. There are several ways to reduce the problems of harmonics in a circuit or power distribution system. A K-rated transformer is designed to withstand the overheating problems created by harmonics. A harmonic mitigatingContinue reading “Five Ways to Reduce Harmonics in Circuits and Power Distribution Systems”
Tag Archives: Transformers
Current-Carrying Capacity Parallel Single-Core LV Cable
Published by Lech BOROWIK1, Artur CYWIŃSKI2Politechnika Częstochowska, Wydział Elektryczny (1), Pracownia Projektowa omega-projekt (2) Abstract. The paper presents the problems related to the selection of parallel single-core low voltage cables in terms of their current carrying capacity and accordance with PN-IEC 60364-5-523 national standard, exemplified by electric power transmission from transformer MV/LV 1600kVA, with proximityContinue reading “Current-Carrying Capacity Parallel Single-Core LV Cable”
Thermal Problems in HTS Transformer due to Inrush Current
Published by Grzegorz KOMARZYNIEC1, Tadeusz JANOWSKI2, Grzegorz WOJTASIEWICZ2, Michał MAJKA2, Politechnika Lubelska, Instytut Podstaw Elektrotechniki i Elektrotechnologii (1), Instytut Elektrotechniki w Warszawie (2) Abstract. With switching on a superconducting transformer to the energetic network, a unidirectional current of high amplitude may appear. Maximal values of the current impulses following shortly one after the other mayContinue reading “Thermal Problems in HTS Transformer due to Inrush Current”
Transmission System Harmonics Study
Published by Electrotek Concepts, Inc., PQSoft Case Study: Transmission System Harmonics Study, Document ID: PQS0501, Date: March 31, 2005. Abstract: A utility presently operates two 16.8 MVAr capacitor banks in a 161/69kV substation. Supplied by this substation are residential, commercial, and industrial loads, including a steel manufacturing facility. For increased voltage support, the utility is investigatingContinue reading “Transmission System Harmonics Study”
Billing Measurements in the High and Extra-High Voltage Network taking into Account the New Frequency Classes According to IEC 61869-1 ED2 (AFDIS)
Published by Roland Buerger (Senseleq B.V.), Dr. Thomas Heid (CONDIS SA) Internationally, it is not easy to specify the range of high voltage exactly. The boundary between medium and high voltage is between 30 kV and 100 kV, depending on local and historical conditions. In the current version of EN 50160 from 2020, the voltageContinue reading “Billing Measurements in the High and Extra-High Voltage Network taking into Account the New Frequency Classes According to IEC 61869-1 ED2 (AFDIS)”
Reactors in a Power System
Published by Alex Roderick, EE Power – Technical Articles Reactors in a Power System, May 03, 2021. This article highlights two common types of reactors which are the dry-type and the oil-immersed. In an AC circuit, reactance is the opposition to current flow. A reactor, also known as a line reactor, is a coil wired in series betweenContinue reading “Reactors in a Power System”
Faults and Defects in Power Transformers – A Case Study
Published by Cacilda de Jesus Ribeiro1; André Pereira Marques2,3; Cláudio Henrique Bezerra Azevedo2; Denise Cascão PoliSouza1; Bernardo Pinheiro Alvarenga1; Reinaldo Gonçalves Nogueira1 1School of Electrical and Computer Engineering, Federal University of Goiás, Goiânia, GO, Brazil,2CELG Distribuição, Goiânia, GO, Brazil,3Federal Institute of Education, Science and Technology of Goiás, Goiânia, GO, Brazil Abstract – Power transformers playContinue reading “Faults and Defects in Power Transformers – A Case Study”
Utility Power Transmission and Distribution Systems
Published by Alex Roderick, EE Power – Technical Articles: Utility Power Transmission and Distribution Systems, October 16, 2021. Electrical power used in residential, commercial, and industrial buildings is typically generated by a utility at a central point and transmitted and distributed to where it is required through the utility power transmission and distribution system. A utilityContinue reading “Utility Power Transmission and Distribution Systems”
Grounding for Noise Reduction in Electronic Systems
Published by Lorenzo Mari, Master of Science degree in Electric Power Engineering, Rensselaer Polytechnic Institute (RPI), EE Power – Technical Articles: Grounding for Noise Reduction in Electronic Systems, April 06, 2021. Learn about everyday grounding systems to reduce common-mode noise. Grounding is the primary method of reducing noise pickup. A good grounding and bonding design can solve a considerableContinue reading “Grounding for Noise Reduction in Electronic Systems”
Concrete Facility Harmonic Evaluation ASD Drive Trips and Transformer Fires
Published by Electrotek Concepts, Inc., PQSoft Case Study: Concrete Facility Harmonic Evaluation ASD Drive Trips and Transformer Fires, Document ID: PQS0503, Date: March 31, 2005. Abstract: A Kiln ID fan drive (12 pulse rectifier) powers a 3000 HP medium voltage (4kV) motor. The associated harmonic filter periodically becomes overloaded and trips the corresponding 4kV breaker. TheContinue reading “Concrete Facility Harmonic Evaluation ASD Drive Trips and Transformer Fires”
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