Published by Paweł SZCZEŚNIAK1, Piotr POWROŹNIK2, Elżbieta SZTAJMEC3, University of Zielona Góra, Institute of Automatic Control, Electronics and Electrical Engineering (1), University of Zielona Góra, Institute of Metrology, Electronics and Computer Science (2), Rzeszow University of Technology, Departament of Power Electronics and Power Engineering (3)ORCID: 1.0000-0002-5822-3878; 2.0000-0001-7485-9959; 3.0000-0002-2125-0207 Abstract. The growth in new prosumer electricityContinue reading “Selected Voltage Control Methods in LV Local Distribution Grids with High Penetration of PV”
Tag Archives: Harmonics
High impedance Fault Detection in Low Voltage Overhead Distribution based Wavelet and Harmonic Indices
Published by Enaam ALBANNA1, Alya H. AL-RIFAIE2, Ahmed A. Abdullah AL-KARAKCHI3, Northern Technical University (1,2,3) ORCID: 1. 0000-0002-3974-0116; 2. 0000-0002-7978-2193; 3. 0000-0003-1151-3015; Abstract. High-impedance fault HIF occurs when an energized conductor makes contact with a surface with a high impedance. Conventional overcurrent protection cannot detect this fault due to the low fault current, and thereContinue reading “High impedance Fault Detection in Low Voltage Overhead Distribution based Wavelet and Harmonic Indices”
Presentation Harmonics Distortion of Power Waveforms Signals
Published by Małgorzata ZYGARLICKA1, Jarosław ZYGARLICKI2, Politechnika Opolska, Instytut Automatyki i Informatyki (1) Politechnika Opolska, Instytut Elektroenergetyki i Energii Odnawialnej (2) Abstract. The paper presents a new proposal for the presentation of the harmonic distortion of the power signals. The proposed method uses a simplified method of harmonic analysis – five ordinates method by whichContinue reading “Presentation Harmonics Distortion of Power Waveforms Signals”
Power Quality Analysis: Case Study for Induction Motor and 110/35kV Substation
Published by 1. Nuri Berisha, 2. Bahri Prebreza*, 3. Petrit Emini, Faculty of Electrical and Computer Engineering, University of PrishtinaORCID: 1. 0000-0001-8615-637X; 2. 0000-0003-1950-026X; 3. 0000-0002-2833-9001 Abstract. Power system harmonics have a significant impact on the efficiency, reliability, and stability of the system. Low power quality is determined by undervoltages and overvoltages, dips and swells,Continue reading “Power Quality Analysis: Case Study for Induction Motor and 110/35kV Substation”
PQ Secure
Published by Unipower AB, Metallgatan 4C, 44132 Alingsås, Sweden. Email: info@unipower.se PQ Secure – Power Quality Management System The quality of your power is extremely important as disturbances or short outages can cause major problems for your equipment and systems. We have created a Power Quality Management System that will assist you in monitoring your systemContinue reading “PQ Secure”
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”
Unipower – About Power Quality
Published by Unipower AB, Metallgatan 4C, 44132 Alingsås, Sweden. Email: info@unipower.se Power quality is a generic term for disturbance-free electricity supply. Deviation from voltage sinusoidal waveform (50 Hz), which may result in equipment being disturbed or damaged, is to be regarded as a power quality disturbance. This means that the more sensitive equipment you connect toContinue reading “Unipower – About Power Quality”
UPS Problem at Datacentre
Published by Unipower AB, Case Study: UPS Problem at Datacentre, Date: January 29th, 2017. Email: info@unipower.se Summary A software development company builds a new datacentre and experience problems with the UPS units and a hard drive failure. A monitoring system, PQ Secure from Unipower AB, was installed and it could be determined that the UPS units,Continue reading “UPS Problem at Datacentre”
Choosing The Right Equipment
Published by Unipower AB, Metallgatan 4C, 44132 Alingsås, Sweden. Email: info@unipower.se What do you need to measure? Power quality is assessed based on a number of power quality parameters. Today’s instruments usually handle the most common parameters such as voltage, current, power, harmonics, voltage dips, flicker and transients. Often it is difficult to say in advanceContinue reading “Choosing The Right Equipment”
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”
Power Quality Blog 