Published by António LEBRE, Fernando BASTIÃO Nuno MELO, Luísa JORGE Pedro VELOSO, António BLANCO, EDP Distribuição – Portugal. Emails: antoniojose.lebrecardoso@edp.pt, nuno.melo@edp.pt, pedro.veloso@edp.pt, fernando.bastiao@edp.pt, luisa.jorge@edp.pt, antonio.blanco@edp.pt ABSTRACT There is an increase in the quantity and in the variety of challenges faced by distribution network operators, concerning to Power Quality (PQ). EDP Distribuição, in Portugal, has beenContinue reading “Power Quality in the Portuguese Distribution Network”
Category Archives: Case Studies
Voltage Fluctuations in Networks with Distributed Power Sources
Published by Maciej MRÓZ1, Zbigniew HANZELKA, Krzysztof CHMIELOWIEC2, TAURON Dystrybucja S.A.(1), AGH – University of Science and Technology (2) Abstract. One of the electromagnetic disturbances generated by distributed power sources, e.g. wind turbines, are voltage fluctuations. An imprecise prediction of the disturbance level may be the reason for erroneous decisions made at the stage ofContinue reading “Voltage Fluctuations in Networks with Distributed Power Sources”
Causes and Solutions of the Potential Induced Degradation (PID) Effect in PV Modules
Published by Pietro Tumino, EE Power – Technical Articles: Causes and Solutions of the Potential Induced Degradation (PID) Effect in PV Modules, July 09, 2020. In case you are dealing with unexpected and unreasonable power loss in your photovoltaic plant, you may be experiencing the PID effect in the PV modules. Potential induced degradation (PID)Continue reading “Causes and Solutions of the Potential Induced Degradation (PID) Effect in PV Modules”
Resource-Saving Protection of Powerful Electric Motors
Published by Mark KLETSEL1, Abdulla KALTAYEV2, Bauyrzhan MASHRAPOV2,National Research Tomsk Polytechnic University (1), Pavlodar State University (2) Abstract.The article presents the disadvantages of traditional and some new electric protections of powerful electric motors. It is proposed to eliminate these drawbacks by constructing phase-sensitive protection that does not use current transformers, with a majority circuit andContinue reading “Resource-Saving Protection of Powerful Electric Motors”
The New Design of the Vacuum Circuit Breaker Mounted on the Roof of Electric Traction Units
Published by Piotr BORKOWSKI1, Łukasz NOWAK1, Stanisław SZYMAŃSKI2,Department of Electrical Apparatus of the Technical University of Lodz(1), Factory of Electrical Apparatus Woltan(2) Abstract. This article presents the research on new design of a vacuum breaker type DCU-800M mounted on the roof of Electric Traction Units. The impact of one circuit breaker on another one wasContinue reading “The New Design of the Vacuum Circuit Breaker Mounted on the Roof of Electric Traction Units”
Dissecting Electric Motor Malfunctions
Published by Alex Roderick, EE Power – Technical Articles: Dissecting Electric Motor Malfunctions, October 20, 2021. Learn about the important electric motor parameters, such as voltage rating, acceleration time, overcycling, and insulation resistance, that should be taken into account to avoid electric motor malfunctions. Electric motors are designed and sized to operate in HVAC systems forContinue reading “Dissecting Electric Motor Malfunctions”
Monitoring of Electric Arc Furnace Supply Voltage Frequency using Phasor Analysis
Published by Szymon BARCZENTEWICZ, Krzysztof DUDA, Andrzej BIEŃ, AGH University of Science and Technology Abstract. This paper presents the results of measurement experiment conducted in the operating steel plant. Frequency analysis of measured signals revealed an interesting phenomenon, as it happened that after switching off the electric arc furnace, the frequency of the supplying voltageContinue reading “Monitoring of Electric Arc Furnace Supply Voltage Frequency using Phasor Analysis”
Highest Voltage Sag and Swell Compensation using Single Phase Matrix Converter with Four Controlled Switches
Published by S. Abdul Rahman1, Shumye Birhan Mule2, Estifanos Dagnew Mitiku3, Gebrie Teshome Aduye4, C. Gopinath5, Department of Electrical & Computer Engineering, Institute of Technology, University of Gondar, Ethiopia (1, 2, 3, 4) Department of Electrical & Electronics Engineering, Sri Venkateswara College of Engineering, Chennai, India (5) Abstract: The aim of this paper is toContinue reading “Highest Voltage Sag and Swell Compensation using Single Phase Matrix Converter with Four Controlled Switches”
Real-Time Monitoring of High Voltage Insulators in the Tropical Climate
Published by Tambi TAMBI1,2, Salama MANJANG1, Syafaruddin SYAFARUDDIN1, Ikhlas KITTA1, Hasanuddin University (1), Halu Oleo University (2) Abstract. The article presents a method of monitoring the performance of real-time high voltage insulators on the effects of natural aging from the influence of tropical climate phenomena based on leakage currents. The monitoring system used Remote-Control UnitContinue reading “Real-Time Monitoring of High Voltage Insulators in the Tropical Climate”
Troubleshooting Electric Motor Power Circuits
Published by Alex Roderick, EE Power – Technical Articles: Troubleshooting Electric Motor Power Circuits, October 15, 2021. The two major parts of a motor circuit are the motor power circuit and the motor control circuit. Learn some basic troubleshooting tips for these kinds of motor circuits. A motor power circuit is the section of an electricalContinue reading “Troubleshooting Electric Motor Power Circuits”
Power Quality Blog 