Author Archives: PQBlog

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”

Reactive Power Compensation in Distribution System – Changing Paradigm 

Published By M.L.Sachdeva, Former Chief Engineer, CEA & N.S.Sodha, Former Executive Director, PowerGrid. Conference on ‘Reliable & Quality Power’ on 30-31st May 2019 CBIP Conference Hall, New Delhi. Synopsis Reactive power compensation technologies inhibited in the Distribution system as also Power system of the Present (Conventional) and Power System of Future (Up-front Conventional cum  Renewable ResourcesContinue reading “Reactive Power Compensation in Distribution System – Changing Paradigm “

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”