Published by Electrotek Concepts, Inc., PQSoft Case Study: Harmonic Measurement Data Evaluation, Document ID: PQS1001, Date: March 15, 2010. Abstract: Utility power system harmonic problems can often be solved using a comprehensive approach including site surveys, harmonic measurements, and computer simulations. This case study presents a harmonic data analysis for a utility12.47kV substation monitoring location forContinue reading “Harmonic Measurement Data Evaluation”
Yearly Archives: 2022
New Idea in Power Networks Development. Selected Problems
Published by Bożena MATUSIAK, Anna PAMUŁA, Jerzy S. ZIELIŃSKI, Katedra Informatyki Uniwersytetu Łódzkiego Abstract. Smart grids and thereafter open grids development implies changes in organizations, technical equipment Power Networks (especially ICT). These new grids influence also on organization and operation of the energy markets, for which it is very important to know correct forecast (mostlyContinue reading “New Idea in Power Networks Development. Selected Problems”
A Short Review of Energy-Efficient Line-Start Motor Design
Published by Tine MARČIČ1, TECES, Research and Development Centre for Electric Machines (1) Abstract. The paper provides an overview of design problems and contemporary research progress in the currently very interesting field of energy-efficient line-start motors. Discussed are problems related to induction motors (IMs), line-start synchronous reluctance motors and line-start interior permanent magnet synchronous motorsContinue reading “A Short Review of Energy-Efficient Line-Start Motor Design”
New Approach to Protecting Transformers Against High Frequency Transients – Wind Turbine Case Study
Published by Dariusz SMUGAŁA(1), Wojciech PIASECKI(1), Magdalena OSTROGÓRSKA(1), Marek FLORKOWSKI(1), Marek FULCZYK(2), Ole GRANHAUG(3), ABB Sp.z.o.o., Corporate Research Center, Cracow, Poland (1), ABB Oy, Medium Voltage Products, Vaasa, Finland (2), ABB AS, Medium Voltage Products, Skien, Norway (3) Abstract. Novel protection method of wind turbine transformers against high frequency transients occurring during switchgear operation isContinue reading “New Approach to Protecting Transformers Against High Frequency Transients – Wind Turbine Case Study”
Transient Performance of Interconnected Wind Turbine Grounding Systems
Published by Blagoja MARKOVSKI, Leonid GRCEV, Vesna ARNAUTOVSKI-TOSEVA, Marija KACARSKA,Ss. Cyril and Methodius University of Skopje, Faculty of Electrical Engineering and Information Technologies Abstract. We analyze the transient grounding characteristics of interconnected wind turbine grounding systems, for fast rising current pulses. By increasing the number of wind turbines, influences on harmonic impedance and transient potentialContinue reading “Transient Performance of Interconnected Wind Turbine Grounding Systems”
Harmonic Current Cancellation Evaluation
Published by Electrotek Concepts, Inc., PQSoft Case Study: Harmonic Current Cancellation Evaluation, Document ID: PQS1002, Date: March 15, 2010. Abstract: Utility power system harmonic problems can often be solved using a comprehensive approach including site surveys, harmonic measurements, and computer simulations. This case study presents the results for a customer step-down transformer harmonic current cancellation evaluation.Continue reading “Harmonic Current Cancellation Evaluation”
Understanding Power Flow and Naming Conventions In Bi-directional Metering Applications
Published by Michael Bearden Introduction In 1982 Raymond “Ray” Stevens published a paper “Power Flow Direction Definitions for Metering of Bi-directional Power”. This paper helped reduce the confusion in the terminology associated with the naming of power quantities based on the direction of active and reactive power flow. The paper did not address leading andContinue reading “Understanding Power Flow and Naming Conventions In Bi-directional Metering Applications”
Importance of Power Quality – Motor
Published by Emerich Energy Private Limited Power quality is of prime importance in deciding the efficiency of any motor. Some of the critical parameters of power quality are • Harmonics• Voltage Unbalance• Voltage Fluctuations In an alternating current (AC) system, the voltage potential and the current through the load circuit are described in frequency andContinue reading “Importance of Power Quality – Motor”
Effect of Grid-Connected Photovoltaic Systems on Static and Dynamic Voltage Stability with Analysis Techniques – A Review
Published by ZETTY ADIBAH KAMARUZZAMAN1, AZAH MOHAMED2, HUSSAIN SHAREEF3,Universiti Kebangsaan Malaysia Abstract. This paper presents an overview on the effect of grid-connected photovoltaic (PV) system on static and dynamic voltage stability and discusses the analysis techniques used to quantify the effect. A review on the published works showed that the PV system design, PV parametersContinue reading “Effect of Grid-Connected Photovoltaic Systems on Static and Dynamic Voltage Stability with Analysis Techniques – A Review”
Impact of SMES Unit on DC-Link Voltage of DFIG during Various Types and Level of Faults
Published by A. M. Shiddiq YUNUS1, Makmur SAINI1, Ahmed Abu-SIADA2, Mohammad A.S. MASOUM3, State Polytechnic of Ujung Pandang (1), IndonesiaCurtin University (2), AustraliaUtah Valley University(3), USA Abstract. Wind energy becomes a popular source for renewable energy based power plants since a recent decade ago. Within many types of wind turbine generator (WTG), Doubly Fed InductionContinue reading “Impact of SMES Unit on DC-Link Voltage of DFIG during Various Types and Level of Faults”
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