Published by Bartłomiej SZAFRANIAK, Paweł ZYDROŃ, and Łukasz FUŚNIK, AGH University of Science and Technology, Krakow, Poland Abstract. In low-voltage (LV) electrical networks metal-oxide varistor (MOV) surge arresters connected in parallel are often used against overvoltages. The paper presents the results of laboratory experiments, during which pairs of parallel connected MOV surge arresters were subjectedContinue reading “Analysis of the Influence of Unequal Current Distribution on the Heating of Parallel Connected LV MOV Surge Arresters”
Tag Archives: Power Distribution
Ferroresonance in Distribution Systems – State of the Art
Published by Mohamed M. EL-Shafhy1, Alaa M. Abdel-hamed1, Ebrahim A. Badran2,Electrical Power & Machines Department, High Institute of Engineering, El-Shorouk Academy, Cairo, Egypt (1), Electrical Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt (2) Abstract. Recently, there are increasing interest in studying the ferroresonance phenomenon, due to the various problems it causes to powerContinue reading “Ferroresonance in Distribution Systems – State of the Art”
Higher Harmonics Filtration in the Power Supply System of Thyristor Hoisting Machine of Shaft Transport in a Mining Plant
Published by Marian HYLA, Silesian University of Technology, Department of Power Electronics, Electrical Drives and Robotics. ORCID: 0000-0001-6466-7398 Abstract. The paper presents the issues of the influence on the supply electrical power grid of the thyristor rectifier supplying high power receivers such as a shaft hoisting machines in mining. The current distortion influence of theContinue reading “Higher Harmonics Filtration in the Power Supply System of Thyristor Hoisting Machine of Shaft Transport in a Mining Plant”
EDP Distribuição’s Development of Support Tools and Platforms for Power Quality Management and Analysis
Published by Fabrice GONÇALVES, António LEBRE, Pedro VELOSO, Fernando BASTIÃO, Nuno MELO, DP Distribuição – Portugal. Emails: fabrice.goncalves@edp.pt, antoniojose.lebrecardoso@edp.pt, pedro.veloso@edp.pt, fernando.bastiao@edp.pt, nuno.melo@edp.pt 24th International Conference & Exhibition on Electricity Distribution (CIRED). 12-15 June 2017. ABSTRACT EDP Distribuição, as distribution system operator (DSO), has been developing an ambitious Power Quality (PQ) monitoring program. This paper aimsContinue reading “EDP Distribuição’s Development of Support Tools and Platforms for Power Quality Management and Analysis”
Measures and Technical Means for Increasing Efficiency and Reliability of Extra High Voltage Transmission Lines
Published by Vladislav KUCHANSKYY1, Paul SATYAM2, Olena RUBANENKO3, Iryna HUNKO4,Institute of Electrodynamics of NAS of Ukraine (1), Kiev, Ukraine University of the West of England (2), Bristol United Kingdom, Regional Innovational Center at the Faculty of Electrical Engineering University of West Bohemia (3), Plzen, Czech Republic, Vinnytsia National Technical University (4), Vinnytsia, Ukraine Abstract. ElectromagneticContinue reading “Measures and Technical Means for Increasing Efficiency and Reliability of Extra High Voltage Transmission Lines”
Negative Sequence Current as a Breaker Failure Protection for Medium Voltage Grids
Published by 1. Tomáš ŠKUMÁT1, 2. Žaneta ELESCHOVÁ2,Západoslovenská distribučná, a. s. (1). Slovak University of Technology in Bratislava (2)ORCID. 2. 0000-0002-7596-108X Abstract. This paper focuses on situations in Medium Voltage (MV) grids where a feeder´s breaker failure occurred. This type of fault is quite severe but well handled in higher voltage systems (high voltage, extraContinue reading “Negative Sequence Current as a Breaker Failure Protection for Medium Voltage Grids”
Improvement of Voltage Stability in the HV Distribution Line using an Active Power Filter
Published by Julian WOSIK1, Marcin HABRYCH2, Bogdan MIEDZIŃSKI2, Grzegorz DEBITA3, Andrzej FIRLIT4, Institute of Innovative Technologies EMAG (1), Wroclaw University of Science and Technology (2), General Tadeusz Kosciuszko Military University of Land Forces (3), AGH University of Science and Technology (4) Abstract. The article explains the reason of a voltage instability in distribution networks basingContinue reading “Improvement of Voltage Stability in the HV Distribution Line using an Active Power Filter”
Multi-Servers System with Firebird Database for Automatic Reactive Power Compensation
Published by Marian HYLA, Silesian University of Technology, Department of Power Electronics, Electrical Drives and Robotics Abstract. The paper presents the concept, implementation and operational effects of the multi-servers automatic reactive power compensation system in 6 kV industry electrical power grid. As controlled reactive power compensators were used synchronous motors, capacitors’ banks and passive filtersContinue reading “Multi-Servers System with Firebird Database for Automatic Reactive Power Compensation”
Obtaining Feasibility of Power Flows in the Deregulated Electricity Market Environment
Published by Mariusz DRABECKI, Eugeniusz TOCZYŁOWSKI,Warsaw University of Technology, Institute of Control and Computation Engineering Abstract. In this paper we analyse a power dispatch method for obtaining feasible power flows, both active and reactive power, in terms of satisfying the transmission, voltage level and voltage angles’ constraints, under assumption that supply of electric power isContinue reading “Obtaining Feasibility of Power Flows in the Deregulated Electricity Market Environment”
Steps to Find the Source of Harmonics
Published by David Horning, November 2014. Power Monitors, Inc., White Paper: Steps to Find the Source of Harmonics Abstract. Harmonics are “Non-Linear” current or voltage in an electrical system. Any waveform that deviates from a perfect sine wave has harmonics. Any nonlinear load draws harmonic currents and therefore produces harmonic voltage distortion, by producing non-sinusoidalContinue reading “Steps to Find the Source of Harmonics”
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