Published by Alex Roderick, EE Power – Technical Articles: Transformer Losses and Efficiency, June 16, 2021 In this article we will learn about the four main types of transformer losses and calculations for finding the efficiency of a transformer. Transformers, like all devices, are not perfect. While ideal transformers do not have losses, real transformers haveContinue reading “Transformer Losses and Efficiency”
Author Archives: PQBlog
Effect of Soil Moisture on Current-Carrying Capacity of Low-Voltage Power Cables
Published by Stanislaw CZAPP1, Filip RATKOWSKI1, 2, Gdańsk University of Technology (1), Research & Development Center, Eltel Networks Energetyka SA (2) Abstract. One of the factors affecting current-carrying capacity of underground power cables is the thermal resistivity of soil. Its value in the close proximity of the cable is the most important, and for thisContinue reading “Effect of Soil Moisture on Current-Carrying Capacity of Low-Voltage Power Cables”
Voltage Measurements Using Noise Distribution
Published by Grzegorz WĘGRZYN1, Robert SZCZYGIEŁ,AGH2, University of Science and Technology. ORCID: 1. 0000-0002-4132-4939; 2. 0000-0001-6342–0107 Abstract. This paper presents a concept of noised signal voltage measurement using noise distribution. The goal of this project was to work out a new solution for low noise, hybrid pixel detectors that work in single photon counting mode.Continue reading “Voltage Measurements Using Noise Distribution”
Harmonics From Solar PV Inverters
Published by Muhammad Najmi Bohari, P.Eng, powerquality.sg THE ABCS OF POWER QUALITY IN SINGAPORE, October 14, 2023. In general, current harmonics contribution from solar PV inverters do not pose much of a power quality problem. Its ITHD is usually small and negligible as compared to a harmonics-producing load such as a variable speed drive (ITHDContinue reading “Harmonics From Solar PV Inverters”
Power Quality Issues and It’s Mitigation Techniques
Published by Tejashree G. More, Pooja R. Asabe,Prof. Sandeep Chawda, (Department of Electrical Engineering, Bhivarabai Sawant Institude Of Technology and Research(w), Wagholi, Pune, India) ABSTRACT In this paper the main power quality (PQ) problems are presented with there associated causes and consequences. The economic impact associated with PQ are characterized. Also this paper tries toContinue reading “Power Quality Issues and It’s Mitigation Techniques”
Power Quality in the Portuguese Distribution Network
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”
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”
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