Published by Andrzej SOWA, Bialystok University of Technology, Faculty of Electrical Engineering Abstract: Correctness estimation of lightning protection solutions require definition of lightning current distribution in conductive installations entering the structure during direct strike to lightning protection system of this structure. It concerns particularly this part of lightning current, which flows in electric installation. InformationContinue reading “Lightning Currents in Low-Voltage Power Systems”
Author Archives: PQBlog
Step Voltage Nearby Tree for Surge Current Excitation
Published by Jarosław WIATER, Białystok University of Technology Abstract. Step voltage situation arise when it is possible for a person to make simultaneous contact with a part of an electrical system which is not live under normal conditions but has become live due to the passage of current for example lightning strike one. The purposeContinue reading “Step Voltage Nearby Tree for Surge Current Excitation”
Estimation of Voltage and Current Distortions in the Power System Supplying the AC Arc Furnace
Published by Wiesław BROCIEK1, Robert WILANOWICZ2,Warsaw University of Technology (1) , Radom University of Technology (2) Abstract. The paper presents a circuit model of three phase arc arrangement, taking into account the nonlinearity of the arc appearing In the particular phases as well as the windings vector groups of a furnace transformer. This model wasContinue reading “Estimation of Voltage and Current Distortions in the Power System Supplying the AC Arc Furnace”
Techno-Economic Analysis of Off-Grid Renewable Energy Power Station: A Case Study
Published by Liu Liqun, Liu Chunxia, Taiyuan University of Science & Technology Abstract. This paper gives the techno-economic analysis of a wind-PV-diesel system with storage battery backup for an off-grid power station specially located in Dongwangsha, studying data from a particular site in littoral China. The simulation and optimization results indicated the most optimized sizingContinue reading “Techno-Economic Analysis of Off-Grid Renewable Energy Power Station: A Case Study”
PWM Drive Motor Failures due to Transient Voltages
Published by Electrotek Concepts, Inc., PQSoft Case Study: PWM Drive Motor Failures due to Transient Voltages, Document ID: PQS0404, Date: June 30, 2004. Abstract: In an effort to improve the efficiency of many industrial processes, equipment has been retrofitted with adjustable speed drives (ASDs). The ASDs allow for better speed control, soft starting of motors, andContinue reading “PWM Drive Motor Failures due to Transient Voltages”
Measurement Characteristics of Voltage in Practice and Possibilities for Improvement of Voltage
Published by Alena OTCENASOVA, Juraj ALTUS, Petr HECKO, Marek ROCH,Slovakia, University of Zilina, Faculty of Electrical Engineering, Department of Power Electrical Systems Abstract. Worsened quality of supplied as well as demanded electricity causes in reality a large financial loss. The main quality parameters monitored today are voltage dips and interruptions. In this context there areContinue reading “Measurement Characteristics of Voltage in Practice and Possibilities for Improvement of Voltage”
Power Quality Issues, Solutions and Standards: A Technology Review
Published by P. M. Balasubramaniam1 and S. U. Prabha2*1Department of Electrical and Electronics Engineering, Sri Shakthi Institute of Engineering and Technology, Coimbatore, India2Department of Electrical and Electronics Engineering, Sri Ramakrishna Engineering College, Coimbatore, India *Corresponding author. E-mail: baluanujayen@gmail.com AbstractClassically, the aim of the electric power system is to generate electrical energy and to deliver thisContinue reading “Power Quality Issues, Solutions and Standards: A Technology Review”
Phase-to-Phase Transients at Transformer Terminations During Utility Capacitor Switching
Published by Electrotek Concepts, Inc., PQSoft Case Study: Phase-to-Phase Transients at Transformer Terminations During Utility Capacitor Switching, Document ID: PQS0603, Date: January 1, 2006. Abstract: There are a number of important transient related concerns when transmission capacitor banks are applied. These concerns include insulation withstand level, switchgear capabilities, energy duties of protective devices, and system harmonicContinue reading “Phase-to-Phase Transients at Transformer Terminations During Utility Capacitor Switching”
Electrical System
Published by Bureau of Energy Efficiency Syllabus Electrical system: Electricity billing, Electrical load management and maximum demand control, Power factor improvement and its benefit, Selection and location of capacitors, Performance assessment of PF capacitors, Distribution and transformer losses. 1.1 Introduction to Electric Power Supply Systems Electric power supply system in a country comprises of generatingContinue reading “Electrical System”
Higher Harmonics Compensation in Grid-Connected PWM Converters for Renewable Energy Interface and Active Filtering
Published by Szymon PIASECKI1, Marek JASIŃSKI1, Krzysztof RAFAŁ1, Marek KORZENIEWSKI 2, Aritz MILICUA3, Politechnika Warszawska, Instytut Sterowania i Elektroniki Przemysłowej (1), Politechnika Białostocka, Katedra Energoelektroniki i Napędów Elektrycznych (2), Uniwersytet w Mondragon, Wydział Elektryczny (3) Abstract. The paper presents overview of high-order harmonics compensation methods applied for control of grid-connected converter. Two harmonic compensation methodsContinue reading “Higher Harmonics Compensation in Grid-Connected PWM Converters for Renewable Energy Interface and Active Filtering”
Power Quality Blog 