Published by Unipower AB, Metallgatan 4C, 44132 Alingsås, Sweden. Email: info@unipower.se We have received questions about disturbances in the grid. Do we have any examples? Here is an interesting example showing how disturbances spread through the network. A major frequency disturbance occured in Scandinavia on December 1, 2005. In this comparison we have compared measuring dataContinue reading “Upstream Frequency Disturbance”
Category Archives: Case Studies
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”
Impact of Ambient Temperature on the Failure Intensity of Overhead MV Power Lines
Published by Andrzej Ł. Chojnacki, Kielce University of Technology, Department of Power EngineeringORCID: 0000-0002-9227-7538 Abstract. The article presents the influence of weather conditions, represented by the ambient temperature, for the intensity of the failure of MV overhead power lines. It presents the mechanisms of damaging the equipment by the high and low temperatures. It showsContinue reading “Impact of Ambient Temperature on the Failure Intensity of Overhead MV Power Lines”
Active and Reactive Power Control in a Three-Phase Photovoltaic Inverter
Published by 1.Adnan Majeed Abed1, 2. Afaneen Anwer Alkhazraji2, 3. Shatha S. Abdulla3, University of Technology, Iraq, Baghdad (1), University of Technology, Iraq, Baghdad (2), University of Technology, Iraq, Baghdad (3) ORCID: 1.0000-0002-6558-9552; 2.0000-0003-3995-8307;3. 0000-0001-5493-2485 Abstract. In most nations, grid-connected buildings with solar systems are expanding. Several sites in the system network have high PVContinue reading “Active and Reactive Power Control in a Three-Phase Photovoltaic Inverter”
Comparison of Thresholding Algorithms for Automatic Overhead Line Detection Procedure
Published by Paweł KOWALSKI, Robert SMYK, Gda ´nsk University of Technology Abstract. The article presents an overview of the thresholding algorithms. It compares the algorithms proposed by Pun, Kittler, Niblack, Huang, Rosenfeld, Remesh, Lloyd, Riddler, Otsu, Yanni, Kapur and Jawahar. Additionally, it was tested how the tuning of the Pun, Jawahar and Niblack methods affectsContinue reading “Comparison of Thresholding Algorithms for Automatic Overhead Line Detection Procedure”
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”
Small Hydropower Plant with Variable Speed PM Generator
Published by Witold MAZGAJ, Zbigniew SZULAR, Tomasz WĘGIEL, Tadeusz SOBCZYK, Politechnika Krakowska, Instytut Elektromechanicznych Przemian Energii Abstract. This paper presents a new concept of a Small Hydropower Plant (SHP) which is based on a permanent magnet generator (PM generator) with a propeller turbine integrated with the generator rotor. The PM generator can work at aContinue reading “Small Hydropower Plant with Variable Speed PM Generator”
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 Optimisation of the Usage of Electricity from a Wind Turbine in a Household
Published by Wiesław MICZULSKI1, Oliwia PERS2, Uniwersytet Zielonogórski, Instytut Metrologii, Elektroniki i Informatyki (1), ETB Solution GmbH (2) ORCID: 1. 0000-0002-8175-0078; 2. 0000-0002-2962-5261 Abstract. The article presents the concept of an algorithm that optimizes energy management in a household. The algorithm optimizes the usage of the energy from a wind turbine and ensures the greatestContinue reading “The Optimisation of the Usage of Electricity from a Wind Turbine in a Household”
Improvement of Energy Quality through the Application of BtB STATCOM in a Power System
Published by 1. Kheira BELHACEL1, 2. Mohamed BOUDIAF2, 3. Mohamed MOUDJAHED3, 4. Abderrahmane BERKANI4, L2GEGI Laboratory, Electrical Engineering Department, Ibn Khaldoun University, Tiaret, Algeria (1, 3, 4). LAADI Laboratory, Electrical Engineering Department, ZIANE Achour University, Djelfa, Algeria (2) Abstract. Currently and in the last few years, the subject of integrating FACTS in a power systemContinue reading “Improvement of Energy Quality through the Application of BtB STATCOM in a Power System”
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