Tag Archives: Harmonics

Harmonics and Reduction of Energy Consumption in Lighting Systems by Using LED Lamps

Published by Natthanon Phannil, Chaiyan Jettanasen and Atthapol Ngaopitakkul *Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand; Emails: aun_2535_006@hotmail.com (N.P.); chaiyan.je@kmitl.ac.th (C.J.)*Correspondence: atthapol.ng@kmitl.ac.th; Tel.: +66-(0)2-329-8330 Abstract This paper proposes the study and analysis of harmonics, energy consumption and power quality of light emitting diode (LED) lamps equipped in building lighting systems.Continue reading “Harmonics and Reduction of Energy Consumption in Lighting Systems by Using LED Lamps”

Review of Ship Microgrids: System Architectures, Storage Technologies and Power Quality Aspects

Published by Shantha Gamini Jayasinghe1,*, Lasantha Meegahapola2, Nuwantha Fernando2, Zheming Jin3 and Josep M. Guerrero3 1Australian Maritime College, University of Tasmania, Launceston 7250, Australia,2School of Engineering, Royal Melbourne Institute of Technology, Melbourne 3001, Australia; lasantha.meegahapola@rmit.edu.au (L.M.); nuwantha.fernando@rmit.edu.au (N.F.)3Institute of Energy Technology, Aalborg University, Aalborg 9220, Denmark; zhe@et.aau.dk (Z.J.);joz@et.aau.dk (J.M.G.)*Correspondence: shanthaj@utas.edu.au; Tel.: +61-363-249-752 Abstract: Ship microgridsContinue reading “Review of Ship Microgrids: System Architectures, Storage Technologies and Power Quality Aspects”

How do Harmonic Mitigating Transformers save energy?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. Harmonic Mitigating Transformers save energy by reducing losses in the following ways: 1. Zero phase sequence harmonic fluxes are canceled by the transformers secondary windings. This prevents triplen harmonic currents from being induced into theContinue reading “How do Harmonic Mitigating Transformers save energy?”

Wind Energy Conversion System from Electrical Perspective — A Survey

Published by Hyong Sik Kim, Dylan Dah-Chuan Lu, School of Electrical and Information Engineering, University of Sydney, Sydney, Australia. Email: hkim4210@uni.sydney.edu.au Smart Grid and Renewable Energy, 2010, 1, 119-131 doi:10.4236/sgre.2010.13017 Published Online November 2010 (http://www.SciRP.org/journal/sgre). Received October 20th, 2010; revised November 14th, 2010; accepted November 20th, 2010. ABSTRACT This paper focuses on the wind energyContinue reading “Wind Energy Conversion System from Electrical Perspective — A Survey”

How do Harmonic Mitigating Transformers reduce voltage distortion?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. Delta-wye transformers, even those with a high K-factor rating, generally present high impedance to the flow of harmonic currents created by the non-linear loads. Question 8 showed that the non-linear loads are current sources thatContinue reading “How do Harmonic Mitigating Transformers reduce voltage distortion?”

What are zero sequence harmonic filters and how do they reduce 3rd harmonic currents and prevent neutral conductor overheating?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. Zero sequence currents, in simple terms, are those found in the neutral conductor. They include the unbalanced 60 Hz currents and the 3rd, 9th, 15th and other triplen harmonic currents. Zero sequence currents appear inContinue reading “What are zero sequence harmonic filters and how do they reduce 3rd harmonic currents and prevent neutral conductor overheating?”

Paralleling Dissimilar Generators: Part 2 – Compatible Alternators

Published by By Gary Olson, Director of Technical Support, Cummins Power Generation, Power topic #9016 | Technical information from Cummins Power Generation – White Paper Paralleled alternators are compatible if they can operate in parallel without having damaging or disruptive neutral currents flowing between them. The magnitude of neutral current flow related to the dissimilarityContinue reading “Paralleling Dissimilar Generators: Part 2 – Compatible Alternators”

How do harmonics increase power losses and overheat transformers?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. Harmonics generated by non-linear loads substantially increase the losses in conventional or K-rated delta-wye distribution transformers. This increase in losses will increase operating costs and can shorten transformer life. The main thrust of the K-ratedContinue reading “How do harmonics increase power losses and overheat transformers?”

K-Factor Transformers and Non-linear Loads

Published by Kiran Deshpande & Prof. Rajesh Holmukhe, Dept. of Electrical Engineering, College of Engineering, Bharati Vidyapeeth University, Pune, E-mail: irkin85@hotmail.com Prof. Yogesh Angal, Dept. of Instrumentation Engineering, Dr. D. Y.Patil Institute of Engineering and Technology, Pimpri, Pune: 411 018. Abstract – Harmonic currents generated by non-linear loads can cause problems in the power systemsContinue reading “K-Factor Transformers and Non-linear Loads”