Published by 1. Bahri PREBREZA, 2. Nuri BERISHA1*, 3. Bashkim STATOVCI, Faculty of Electrical and Computer Engineering, University of PrishtinaORCID: 1. 0000-0003-1950-026X; 2. 0000-0001-8615-637X; 3. 0000-0002-6840-0778 Abstract. Power systems might experience electrical problems or power outages, due to atmospheric discharges. The quality of the protection from atmospheric overvoltages will increase the life of the equipmentContinue reading “Analysis of Switching Overvoltages and Protection from Atmospheric Overvoltages for 400kV Switchgears in the Kosovo Power System using ATP/EMTP”
Tag Archives: Current
Ultra–Fast Charging of Electric Bus Fleet and its Impact on Power Quality Parameters
Published by 1. Aleksander CHUDY, 2. Paweł A. MAZUREK, Lublin University of Technology ORCID: 1. 0000-0002-3183-8450, 2. 0000-0002-7098-2084 Abstract. The research focused on one–week long measurement of power quality parameters at the connection point of a 450 kW charging station (pantograph type) in the distribution substation. The bus terminal was equipped with 1200 kVA 15.75/0.42Continue reading “Ultra–Fast Charging of Electric Bus Fleet and its Impact on Power Quality Parameters”
Container Harbour in Gothenburg
Published by Jonny Carlsson, Unipower AB, Case Study: Container Harbour in Gothenburg, Date: November 8th, 2010. http://www.unipower.se The most important problem was the sags that were caused by the container cranes. The cranes created a lot of high reactive power during the start of the lift procedure. The high currents caused high demand on the transformerContinue reading “Container Harbour in Gothenburg”
New Technology for PQ Measurements using Auto-Calibration on Capacitive Tap on Inductive Current Transformer
Published by Jonny CARLSSON – Unipower AB, David HOLMBERG – AB Vattenfall, Jan ÖSTLUND – ABB AB Abstract A method of real-time calibrating the voltage signal from the Capacitive Tap on an ABB Current Transformer using Unipowers ‘UP-2210R/ABB Capacitive tap Module’ has produced accurate results of unbalance, harmonics and transients with no limitation in bandwidth.Continue reading “New Technology for PQ Measurements using Auto-Calibration on Capacitive Tap on Inductive Current Transformer”
Power Quality Improvement in Distributed Generation System under varying Load Conditions using PWM and Hysteresis Controller
Published Vijayshree G1, Sumathi S2, RNSIT, Bangalore,Karnataka,India(1). RNSIT, Bangalore,Karnataka, India(2) Abstract – This paper proposes a power system network modeled using a microgrid, integrated with wind and solar photovoltaic (PV) resources, along with the battery energy storage system (BESS) connected to the three-phase grid feeding the linear and nonlinear load. The simulation is carried outContinue reading “Power Quality Improvement in Distributed Generation System under varying Load Conditions using PWM and Hysteresis Controller”
Evaluating Direction of Harmonics – Power Harmonics
Published by Unipower AB, Metallgatan 4C, 44132 Alingsås, Sweden. Email: info@unipower.se One important issue is how to trace the source of harmonics. The example below shows harmonic filters connected until 11.00 and there is no voltage distortion as expected. After 11.00 the filters were disconnected due to a fault and voltage harmonics can be seen.Continue reading “Evaluating Direction of Harmonics – Power Harmonics”
Application of the Permanent Magnet Synchronous Motors for Tower Cranes
Published by Łukasz KNYPIŃSKI1,2, Jacek KRUPIŃSKI2, Poznan University of Technology(1), Krupinski Cranes Sp. z o.o.(2) Abstract. The paper presents the results of experimental research concerning the application of the permanent magnet synchronous motors for tower cranes. The modern permanent magnet synchronous motors (PMSM) are characterized by better operating parameters in relation to squirrel cage inductionContinue reading “Application of the Permanent Magnet Synchronous Motors for Tower Cranes”
Eccentricity Fault Identification in Round Rotor Synchronous Motors considering Load Variation
Published by Bashir Mahdi EBRAHIMI1, Jawad FAIZ1, Mohammad ETEMADREZAIE2, Mojtaba BABAIE3, Center of Excellence on Applied Electromagnetic Systems, School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran(1), Department of electrical and computer engineering, Delft, Zuid-holland, Netherlands(2), Faculty of Engineering, Science and Research Campus, Islamic Azad University, Tehran, Iran(3) Abstract. Impacts of load variationContinue reading “Eccentricity Fault Identification in Round Rotor Synchronous Motors considering Load Variation”
The Latest Superconducting Short Current Limiters – Review of Selected Solutions
Published by 1. Joanna KOZIEŁ1, 2. Damian GNAT1, 3.Michał MAJKA1, 4.Yerbol Turgynebekov2,Lublin University of Technology, Department of Electrical Engineering and Electrotechnologies, Faculty of Electrical Engineering and Computer Science(1) Taraz State University after M.Kh.Dulaty, Kazakhstan(2)ORCID: 1.0000-0003-1682-2589, 3.0000-0002-7153-040X Abstract. In the article after the introduction, containing the idea and principle of operation of the SFCL, selected prototypesContinue reading “The Latest Superconducting Short Current Limiters – Review of Selected Solutions”
Analysis of Series Resonance in Power Distribution Networks with Aggregate Harmonic Sources
Published by Felix KALUNTA1, Tolulope AKINBULIRE2, Frank OKAFOR3, Federal Institute of Industrial Research, Lagos (1), University of Lagos (2,3) Abstract. A hybrid technique for the analysis of series resonance in power network with aggregate harmonic sources is hereby presented. It involves the identification of resonant modes using admittance scan and computation of network currents atContinue reading “Analysis of Series Resonance in Power Distribution Networks with Aggregate Harmonic Sources”
Power Quality Blog 