IEEE 519-1992 Compliance

Published by Electrotek Concepts, Inc., PQSoft Case Study: IEEE 519 Compliance, Document ID: PQS0321, Date: October 10, 2003. Abstract: IEEE Standard 519-1992 is a standard that addresses the need for limiting the harmonic current a customer injects onto the utility system. It also protects the customer by specifying maximum harmonic voltage distortion levels that utilities canContinue reading “IEEE 519-1992 Compliance”

PD Pulse Burst Characteristics in Differently Aged Transformer Oils under AC Conditions

Published by JUNHAO LI1, YANMING LI1, GUOLI WANG2, Martin D. JUDD3,State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University (1)Electric Power Research Institute of China South Grid (2)Institute for Energy and Environment, Department of Electronic and Electrical Engineering, University of Strathclyde (3) Abstract. Partial discharge (PD) detection is a technique widely usedContinue reading “PD Pulse Burst Characteristics in Differently Aged Transformer Oils under AC Conditions”

Cable Links Designing in HVAC and HVDC Submarine Power Grids – Selected Issues

Published by Mirosław PAROL1, Sylwester ROBAK1, Łukasz ROKICKI1, Jacek WASILEWSKI2,Warsaw University of Technology, Institute of Electrical Power Engineering (1)PSE Innowacje Sp. z o.o. (2) Abstract. Submarine (offshore) HVAC and HVDC cable power grids are becoming more and more important. The establishment of submarine transmission interconnections between various national power systems and the development of offshoreContinue reading “Cable Links Designing in HVAC and HVDC Submarine Power Grids – Selected Issues”

Study on Transformer Tank Vibration Characteristics in the Field and its Application

Published by Ji SHENGCHANG, Zhu LINGYU, Li YANMING, State Key Laboratory of Electrical Insulation and Power Equipment, Department of electric engineering, Xi′an Jiaotong University Abstract. Vibration signal analysis method is one of effective methods to monitor the condition of transformer windings and core. In this paper, the multi-channels vibration measurement system is set up andContinue reading “Study on Transformer Tank Vibration Characteristics in the Field and its Application”

Testing of LV Switchgear for Powering Cellulose Fiber Breaking Systems

Published by Adam SMOLARCZYK1, Tadeusz DASZCZYŃSKI1, Sławomir FISZER2Warsaw University of Technology, Electrical Power Engineering Institute (1), Elektroteam Sp. z o.o. (2) Abstract. The article describes an innovative low voltage switchgear for use in the pulp and paper industry. The switchgear is an innovative structure designed to supply single-phase systems with significant currents above 1 kA.Continue reading “Testing of LV Switchgear for Powering Cellulose Fiber Breaking Systems”

Harmonic Measurement Data Evaluation

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”

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”

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”

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”