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Reliable Power Transformer Efficiency Tests

Gert Rietveld, Ernest Houtzager, Dennis Hoogenboom, Gu Ye
2019 Zenodo  
Power transformer efficiency measurements are a crucial part of the acceptance tests of a power transformer.  ...  This includes the development of more accurate industrial loss measure­ment systems (LMS), optimized LMS calibration approaches, and a reference system for on-site LMS calibration.  ...  LMS CALIBRATION ASPECTS Industrial loss measurement systems are used by power transformer manufacturers to test the quality of their products.  ... 
doi:10.5281/zenodo.3559844 fatcat:wdwxhwnfyze65o2ls3ipqrod7q

EMPIR 17NRM01 TrafoLoss Publishable Summary [article]

Gert Rietveld
2020 Zenodo  
The project "Loss measurements on power transformers and reactors" (EMPIR 17NRM01 TrafoLoss) is working to establish highly accurate loss measurement systems for transformers and reactors and develop prototype  ...  devices that significantly reduce measurement uncertainty.  ...  To develop improved measurement techniques and prototypes for highly accurate measuring systems used for loss measurements of power transformers and reactors at very low power factor.  ... 
doi:10.5281/zenodo.3632927 fatcat:hk6qnpdybvapnaldhk37u2wufe

Diagnosis of Water Tree Aging in XLPE Cable by the Loss Current Harmonic Component Under Variable Frequency Power

Chen Jie
2015 Journal Electrical and Electronic Engineering  
So the variable frequency series resonant power source can be used as the high voltage test power supply in the loss current harmonic component measurement system.  ...  The loss current measurement system based on the high voltage current comparator bridge is used in this paper, which is designed by Harbin University of Science and Technology and Jiangsu Electric Power  ...  Finally, the high voltage standard sinusoidal wave is generated by the experimental transformer, which is the voltage source for tests [5, 6] .  ... 
doi:10.11648/j.jeee.20150306.16 fatcat:tn5f2vp5ujb2tf23fb5exagbyq

Comparison of Reference Setups for Calibrating Power Transformer Loss Measurement Systems

Gert Rietveld, Enrico Mohns, Ernest Houtzager, Henrik Badura, Dennis Hoogenboom
2019 IEEE Transactions on Instrumentation and Measurement  
A unique comparison has been performed of two reference setups for the calibration of industrial power transformer loss measurement systems (TLMSs).  ...  The results of the comparison show excellent agreement of the PTB and VSL reference setups, both for the individual components as for the complete system.  ...  Several commercial systems are available for power transformer loss measurements.  ... 
doi:10.1109/tim.2018.2879171 fatcat:yef7d7pfpbat7kc4jqgzho4fye

Analysis of Metrological Requirements for Electrical Measurement of HVDC Station Losses

A. Bergman
2012 IEEE Transactions on Instrumentation and Measurement  
For high power circuits, this effect is in general small, although a final analysis of a test will need to address the question.  ...  high power applications.  ...  calibration of high voltage measurement systems.  ... 
doi:10.1109/tim.2012.2196395 fatcat:jf5qwsqyyzcv5ksxhc32vb5zam

A switched-winding transformer with low quiescent loss to meet the level VI efficiency standard at high power density

Weston D. Braun, Minjie Chen, David J. Perreault
2017 2017 IEEE Energy Conversion Congress and Exposition (ECCE)  
The system was also tested under inductive and capacitive loads.  ...  As the reduction in copper loss is much larger than the increase in core loss this allows for an increased power rating or power density. II. SWITCHED-WINDING TRANSFORMER SYSTEM III.  ... 
doi:10.1109/ecce.2017.8095989 fatcat:ab2glhu3rvbzfm6j5glnar5m3i

Research on Sampling Test Effect of Large-Scale Power Transformer and its Improvement based on Game Theory

Tian Shu Bi, Jin Meng Chen, Lanmin Wu, Hao Tang, Jing Yin
2014 International Journal of u- and e- Service, Science and Technology  
The sampling test process and results evaluation standard for larger power transformer of State Grid Corporation of China are also introduced.  ...  The quality problems and sampling test effects are mainly analyzed. The results of no-load loss, load loss, partial discharge test and sound level measurement.  ...  Test System Development In order to measure the technical parameters of power transformer accurately, the major parameter testing system of power transformer is developed by China electric power research  ... 
doi:10.14257/ijunesst.2014.7.3.11 fatcat:2r6n2wtlzfaqzbavwga536ztru

Testing Large ASDS

Daniele Buzzini, Maurizio Zago
2013 IEEE transactions on industry applications  
The importance of the ASDS availability for the plant operability calls for extensive factory testing to uncover any possible hidden weakness of components and system design issues before delivery at site  ...  The complete ASDS line-up shall be full load tested before string test with the compressor/pump to prove system electrical performances, protections and control functionalities.  ...  INTRODUCTION The paper aims at describing the challenges of testing high power adjustable speed drive systems (ASDS): measurement of power when voltage and current are distorted, efficiency determination  ... 
doi:10.1109/tia.2013.2255851 fatcat:2rcno7xf3jb7zifa4myldn5k3a

Testing large ASDS

Daniele Buzzini, Maurizio Zago
2012 2012 Petroleum and Chemical Industry Conference (PCIC)  
The importance of the ASDS availability for the plant operability calls for extensive factory testing to uncover any possible hidden weakness of components and system design issues before delivery at site  ...  The complete ASDS line-up shall be full load tested before string test with the compressor/pump to prove system electrical performances, protections and control functionalities.  ...  INTRODUCTION The paper aims at describing the challenges of testing high power adjustable speed drive systems (ASDS): measurement of power when voltage and current are distorted, efficiency determination  ... 
doi:10.1109/pcicon.2012.6549680 fatcat:ppkumusc3rdvjmj4kyndrk5es4

Calibration Method of Capacitive Equipment Charged Detection Device

Bin LI, Jin-song LIU, Yi-song ZHAO, Xue-bin LI, Jian-cheng HAO, Bin ZHANG
2017 DEStech Transactions on Engineering and Technology Research  
for the safe and stable operation of power grid.  ...  On the basis of studying the principle of charged detection of capacitive equipment, a calibration method of charged equipment for capacitive equipment based on high voltage and low voltage is put forward  ...  Calibration Method of Capacitive Equipment Charged Detection Device (1) High voltage calibration method The high voltage test circuit consists of testing power supply, high voltage transformer, high voltage  ... 
doi:10.12783/dtetr/mcae2017/15929 fatcat:ip6xdmwdsjatpmjgfzz3zaqqhi

Estimating uncertainty in loss measurement of power transformers

Anders Bergman, Gert Rietveld, Allan Bergman, Bengt Jönsson, Mathieu Sauzay, Jonathan Walmsley, John-Bjarne Sund
2019 Zenodo  
An effort is currently on-going within IEC to produce a documentary standard on "Rules for the determination of uncertainties in the measurement of the losses of power transformers".  ...  In the case of large power transformers used in grid applications, serious problems are encountered in establishing how reliable the loss measurements are.  ...  The basic model function for power loss measurement will be developed for the case where instrument transformers are used to adapt the high voltages and currents to the inputs of a watt meter.  ... 
doi:10.5281/zenodo.3559837 fatcat:j3jcwqfosrawxiokw2uhjmomui

Analysis Of Power Quality Effect On The Life Time Transformer

Jepi Yuli Hindarianto
2019 ACMIT Proceedings  
The supplied power quality of the PLN grid in the outgoing of step down transformer was measured by using HIOKI PW319 power analyser.  ...  These tests examine the dissolved gas content and dielectric strength in the transformer oil. The work in this thesis is to carry out a study of power quality effect on a transformer lifetime.  ...  As the standard harmonics reference used is the IEEE 519. 1992 standard, "IEEE Recommended Practices and Requirements for Harmonic Control in Electric in Electrical Power Systems".  ... 
doi:10.33555/acmit.v5i1.75 fatcat:tqwoaykqkvgm3av3dkw72hvv74

Technical Steps to improve Energy Efficiency of Distribution Transformers

Alaa Eldin ABD EL AZIZ, Ahmed FATEHY, Nelly AHMED
2014 The International Conference on Electrical Engineering  
International standards, published by means of norms, define the power efficiency of transformers, taking into account the no-load losses, the load losses and capitalization equations.  ...  The measurements of about forty different rating transformers are analyzed and their efficiency are calculated according to energy efficiency methodology These values are compared with the ideal transformers  ...  Substitute larger conductors for those currently in use. 2. Increase the system voltage . 3. Improve system power factor by adding shunt capacitors. 4 . Add lines or feeders. 5.  ... 
doi:10.21608/iceeng.2014.30392 fatcat:bfe66dlhcnhgvarj22u336ip2i

Performance of single wire earth return transformers with amorphous alloy core in a rural electric energy distribution system

Benedito Antonio Luciano, Renato Cucato Inácio, Pablo de Paula e Silva, Francisco das Chagas Fernandes Guerra, Raimundo Carlos Silvério Freire
2012 Materials Research  
It has been recognized that amorphous metal core transformers improve electrical power distribution efficiency by reducing transformer core losses.  ...  performance in comparison to identical nominal rated transformers built with conventional silicon steel cores, particularly with regard to the excitation power and to the no-load losses.  ...  Acknowledgements The authors wish to express their thanks to Professor Antonio Flávio Licarião Nogueira (State University of Santa Catarina -UDESC, Brazil) for the offered suggestions during the elaboration  ... 
doi:10.1590/s1516-14392012005000045 fatcat:klwfhlcw7bgahoz2smctdyiwde

Analysis of the Operation of Cascade Current Transformers for Measurements of Short-Circuit Currents with a Non-Periodic Component with a Large Time Constant of Its Decay

Elzbieta Lesniewska, Jan Olak
2022 Energies  
For most electrical power devices, such measurements are required by international standards.  ...  cores (i.e., hysteresis and eddy current losses) and the load of the secondary winding of the current transformer by the measurement system.  ...  Laboratory equipment short-circuit tests of elements operating in power systems with a high time constant (such as bus bars leading the power supply from the power plant and circuit breakers near the generator  ... 
doi:10.3390/en15082925 doaj:42f0bcdebbdc484ab8ee235d96ddacf1 fatcat:bharnetqevgvbneiwlw6kuzpsu
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