PQBlog

The Basics of Grounding Electrical Systems

Published by Lorenzo Mari, EE Power – Technical Articles: The Basics of Grounding Electrical Systems, April 10, 2020. This article breaks down the complexities found in the fundamental field of grounding for the correct, faultless operation of electrical systems. Grounding, or earthing, is a fundamental topic for the correct operation of electrical systems and devices. However,Continue reading “The Basics of Grounding Electrical Systems”

Stator Earth Fault in 200MW Generator – A Case Study

Published by Mr. V.Veerapandi, Sr.Manager(ser)/SAS, Email:vpandi@bhelpswr.co.in Introduction One of 200 MW old machine was experienced stator earth fault and the unit was tripped when the load was around 154 MW. The stator earth fault was attended on emergency basis and the unit was brought back with minimum possible time. This article covers observations, analysis ofContinue reading “Stator Earth Fault in 200MW Generator – A Case Study”

Transmission System Harmonics Study

Published by Electrotek Concepts, Inc., PQSoft Case Study: Transmission System Harmonics Study, Document ID: PQS0501, Date: March 31, 2005. Abstract: A utility presently operates two 16.8 MVAr capacitor banks in a 161/69kV substation. Supplied by this substation are residential, commercial, and industrial loads, including a steel manufacturing facility. For increased voltage support, the utility is investigatingContinue reading “Transmission System Harmonics Study”

Case Study on Fault Analysis Using PMU

Published by Prithwish Mukhopadhyay, General Manager, prithwish.mukhopadhyay@posoco.in,Rajkumar Anumasula, Senior Engineer, rajkumar@posoco.in, Abhimanyu Gartia, Deputy General Manager, agartia@posoco.in, Chandan Kumar, Engineer, chandan.wrldc@posoco.in, Pushpa Seshadri, Chief Manager, pushpa_seshadri@posoco.in, Sunil Patil, Engineer, skpatil@posoco.in , WRLDC, Mumbai, India Abstract — Synchrophasors are used extensively in Indian Grid to detect and analyze faults occurring in the system. This paper majorlyContinue reading “Case Study on Fault Analysis Using PMU”

AC Equipment Grounding: Creating a Safe Fault Current Path to Ground

Published by Lorenzo Mari, EE Power – Technical Articles: AC Equipment Grounding: Creating a Safe Fault Current Path to Ground, August 07, 2020. Learn about the merits of the equipment grounding to protect people in faulted AC power systems. Electrical equipment casings should be at earth potential under normal conditions. When a fault occurs in anContinue reading “AC Equipment Grounding: Creating a Safe Fault Current Path to Ground”

Analysis of Long-Time Efficiency of Photovoltaic Installation

Published by Jacek DĄBROWSKI, Ewa KRAC, Krzysztof GÓRECKI Katedra Elektroniki Morskiej, Akademia Morska w Gdyni Abstract. In the paper the results of long-time investigations of the photovoltaic installation situated in Gdynia Maritime University are presented. A short description of the considered installation and the weather station making possible continuous monitoring of weather parameters are included.Continue reading “Analysis of Long-Time Efficiency of Photovoltaic Installation”

An Introduction to Microgrid Energy Management Systems

Published by Anushree Ramanath, EE Power – Technical Articles: An Introduction to Microgrid Energy Management Systems, July 05, 2021. This article highlights the growth of microgrids and the components of these systems. With the growing number of industries and businesses, access to reliable and cost-effective power is critical. This leads to demand for small-scale powerContinue reading “An Introduction to Microgrid Energy Management Systems”

Solutions to Mitigate Harmonics

Published by Electrical Installation Wiki, Chapter M. Power harmonics management – Solutions to mitigate harmonics There are three different types of solutions to attenuate harmonics: • Modifications in the installation• Special devices in the supply system• Filtering Basic solutions to mitigate harmonics To limit the propagation of harmonics in the distribution network, different solutions are availableContinue reading “Solutions to Mitigate Harmonics”

Harmonics Standards

Published by Electrical Installation Wiki, Chapter M. Power harmonics management – Harmonics standards Harmonic emissions are subject to various standards and regulations: • Compatibility standards for distribution networks• Emissions standards applying to the equipment causing harmonics• Recommendations issued by Utilities and applicable to installations In view of rapidly attenuating the effects of harmonics, a tripleContinue reading “Harmonics Standards”

Harmonic, Interharmonic and Supraharmonic Characterisation of a 12 MW Wind Park Based on Field Measurements

Published by Ana Maria Blanco1, Britta Heimbach2, Bruno Wartmann2, Jan Meyer1, Marco Mangani2, Martin Oeschger2 1Institute of Electrical Power Systems and High Voltage Engineering, Technische UniversitätDresden, Dresden, Germany2Elektrizitätswerk der Stadt Zürich – EWZ, Zurich, Switzerland1E-mail: ana.blanco@tu-dresden.de 24th International Conference & Exhibition on Electricity Distribution (CIRED), 12-15 June 2017.Session 2: Power quality and electromagnetic compatibility Abstract:Continue reading “Harmonic, Interharmonic and Supraharmonic Characterisation of a 12 MW Wind Park Based on Field Measurements”