Author Archives: PQBlog

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”

Power Quality Impacts in a Typical Microgrid

Published by Arangarajan Vinayagam1, Asma Aziz1, KSV Swarna1, Suiyang Khoo1 and Alex Stojcevski2 1Faculty of Science, Engineering and Built Environment, Deakin University, Geelong Australia.2Centre of Technology, RMIT University, Vietnam. Abstract—Microgrid (MG) power system plays an important role to fulfill reliable and secure energy supply to critical loads of communities as well as for communities inContinue reading “Power Quality Impacts in a Typical Microgrid”

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?”

What is Portable Appliance Testing and Why is PAT Test Done

Published by Carelabs, Carelabs is authorized provider of Electrical Installation’s Study, Analysis, Inspection, and Certification services in UAE. Website: carelabz.com Portable appliance testing (commonly known as “PAT”, “PAT Inspection” or (redundantly) as “PAT Testing) is the term used to describe the examination of electrical appliances and equipment to ensure they are safe to use. The formal term for the processContinue reading “What is Portable Appliance Testing and Why is PAT Test Done”

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 is Soil Resistivity Test and How is the Testing Done

Published by Carelabs, Carelabs is authorized provider of Electrical Installation’s Study, Analysis, Inspection, and Certification services in UAE, and offer voltage drop study and analysis services. Website: carelabz.com The resistance of an earth electrode is related to the resistivity of the soil in which it is placed and driven, and thus soil resistivity calculations and measurements isContinue reading “What is Soil Resistivity Test and How is the Testing Done”