Published by Mikhail ANDREEV, Aleksey SUVOROV, Alisher ASKAROV, Anton KIEVETS, Vladimir RUDNIK, Tomsk Polytechnic University, Russia Abstract. The current trend in the development of electric power systems is the integration of renewable energy sources in the form of distributed generation. It was revealed that one of the main reasons inhibiting this process is a changeContinue reading “Impact of Renewables on Relay Protection Operation”
Author Archives: PQBlog
How High Voltage PTs (VTs) and CTs Limit the Input to PQ Voltage Transient Measuring Instruments and Limit the High Order Harmonic Accuracies of Voltage and Current
Published by Terry Chandler, Director of Engineering, Power Quality Thailand Ltd. & Power Quality Inc., USA. Application Note, Sept. 2013Emails: terryc@powerquality.org, terryc@powerquality.co.th Typical PTs and CTs cause errors and issues in PQ measurements in three areas: 1. Harmonics As the PT and CT have very poor frequency response, they are in affect are a low pass filter onContinue reading “How High Voltage PTs (VTs) and CTs Limit the Input to PQ Voltage Transient Measuring Instruments and Limit the High Order Harmonic Accuracies of Voltage and Current”
Some Aspects of the Growing Penetration of Wind Energy in the Polish Power System
Published by Tadeusz SKOCZKOWSKI1, Maksymilian KOCHAŃSKI1,2, Warsaw University of Technology (1), Research and Innovation Centre Pro-Akademia (2) Abstract. According to the Energy Policy of Poland by 2030 the national power system will have to acquire 12 times more electricity from wind energy than in 2011. This challenging policy goal entails a number of significant consequences.Continue reading “Some Aspects of the Growing Penetration of Wind Energy in the Polish Power System”
General Reference – Modeling for Harmonic Analysis
Published by Electrotek Concepts, Inc., PQSoft Case Study: General Reference – Modeling for Harmonic Analysis, Document ID: PQS0303, Date: January 10, 2003. Abstract: Harmonics have existed on electric power systems for many years. Recently, however, much more attention has been given to monitoring and analyzing the presence and effects of harmonics on utility and customer devicesContinue reading “General Reference – Modeling for Harmonic Analysis”
Detecting Power Systems Failure based on Fuzzy Rule in Power Grid
Published by Suren DRAN. R1, Parvatha VARTHINI. B2, Research Scholar, Department of Information Technology, Sathyabama University, Chennai, Tamilnadu, India (1), Professor & Head, Department of Computer Applications, St. Joseph’s College of Engineering, Chennai, Tamilnadu, India (2) Abstract. Load balancing is an important feature that keeps the power system safe from overloading. Load details can beContinue reading “Detecting Power Systems Failure based on Fuzzy Rule in Power Grid”
Experiment and Analysis of High Power Line-Start PM Motor
Published by Qinfen LU, Xiaoyan HUANG, Yunyue YE, Youtong FANG, Zhejiang University Abstract. This paper investigates the performance of a high power line-start permanent-magnet motor (LSPM) by experiment, which is developed for industrial fans, pumps and compressors to reduce the energy consumption. The no-load back-EMF is measured and compared with predicted result of FEM. InContinue reading “Experiment and Analysis of High Power Line-Start PM Motor”
Harmonic Evaluation at an Industrial Facility
Published by Electrotek Concepts, Inc., PQSoft Case Study: Harmonic Evaluation at an Industrial Facility, Document ID: PQS0502, Date: March 31, 2005. Abstract: A harmonic evaluation was performed at the plastic film manufacturer’s facility. The goals of the evaluation were to develop a solution to mitigate the harmonic voltage distortion caused by the ac and dc adjustableContinue reading “Harmonic Evaluation at an Industrial Facility”
Enhancing of a DC Air-Conditioning System Based on Solar Power Generation
Published by Marwa Ben SLIMENE2,3, Mohamed Arbi KHLIFI1,3, Faculty Engineering, Islamic University of Madinah KSA (1), College of Computer Science and Engineering, University of Haʼil, Haʼil, (2), SIME Laboratory, ENSIT, University of Tunis, (3) Abstract. Photovoltaics powered DC air conditioners have a lot of potential for energy-efficient cooling while also being very cost-effective. They haveContinue reading “Enhancing of a DC Air-Conditioning System Based on Solar Power Generation”
Use of the Renewable and Waste Energy Sources in Heat Storage Systems Combined with ORC Power Plants
Published by Piotr KOLASIŃSKI, Politechnika Wrocławska, Instytut Techniki Cieplnej i Mechaniki Płynów, Zakład Termodynamik Abstract. ORC systems are mainly powered from waste and renewable energy sources. In many cases this type of energy sources are specified by the dynamic capacity and thermal characteristics. Such situation has negative influence on ORC power plant working conditions. InContinue reading “Use of the Renewable and Waste Energy Sources in Heat Storage Systems Combined with ORC Power Plants”
Harmonic Resonance Evaluation for Feeder and Substation Capacitor Banks
Published by Electrotek Concepts, Inc., PQSoft Case Study: Harmonic Resonance Evaluation for Feeder and Substation Capacitor Banks, Document ID: PQS0706, Date: July 27, 2007. Abstract: A utility operates feeder and substation capacitor banks on a 25.56kV distribution feeder. The utility uses frequency scan simulations to determine the effect of distribution feeder and substation capacitor banks onContinue reading “Harmonic Resonance Evaluation for Feeder and Substation Capacitor Banks”
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