PQBlog

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”

Study on a New Method for Overvoltage Measurement using CVT

Published by Si WENRONG, Jin HENG, Huang HUA, Fu CHENZHAO, East China Electric Power Test & Research Institute Company Limited, Shanghai, China Abstract. This paper introduces a new method for overvoltage measurements in 500kV power system using capacitor voltage transformer (CVT). It is realized with a voltage sensor installed within CVT as the low-voltage capacitorContinue reading “Study on a New Method for Overvoltage Measurement using CVT”

Effect of Distribution Feeder Loading on Harmonic Resonance

Published by Electrotek Concepts, Inc., PQSoft Case Study: Effect of Distribution Feeder Loading on Harmonic Resonance, Document ID: PQS0703, Date: July 26, 2007. Abstract: A utility operates 1200 kVAr and 600 kVAr capacitor banks on a 25.56kV distribution feeder. The utility uses frequency scan simulations to determine the effect of the capacitor banks and seasonal loadContinue reading “Effect of Distribution Feeder Loading on Harmonic Resonance”

Power Network Parameters Standards with Implements IEEE-1459 Power Definitions

Published by Andrzej OLENCKI1, Daniel BELICA2, Jarosław MARKIEWICZ3, Piotr MRÓZ4 ,Calmet Spółka z o.o. Zielona Góra (1,2,3), Uniwersytet Zielonogórski (4) Abstract. The development of Polish portable standards of power network parameters and their concepts are presented, taking into account the requirements of the IEEE-1459 standard in the scope of the separation of the fundamental frequencyContinue reading “Power Network Parameters Standards with Implements IEEE-1459 Power Definitions”

Selected Methods for Improving Power Reliability

Published by Krzysztof PRZYSTUPA1, Lublin University of Technology (1) Abstract. The article discusses the problem of the widespread use of devices that require increased quality electric power supply. An example of a practical division of electricity receipts into several categories is shown. Methods of increasing the reliability of power supply are described and the mostContinue reading “Selected Methods for Improving Power Reliability”