Dragana Naumović Vuković – Overview of measuring methods and equipment for calibration of instrument transformers

IcETRAN 2022, Section EE (Power Engineering)

INVITED PAPER:

Overview of measuring methods and equipment for calibration of instrument transformers

Abstract:

Instrument transformers are an important and inevitable element of AC current and voltage measurement techniques. They have been in use for more than a century. In parallel with the development of technical characteristics and improvement of instrument transformers measurements, the measurement methods and measuring equipment developed too. The significant parts of the development in this field are measuring methods, measuring devices, and systems for testing the accuracy of measuring transformers. The measurement accuracy is the most important characteristic of instrument transformers since that is the important factor in the accurate billing of electricity.

The tradition in the field of testing instrument transformer’s accuracy at the Electrical Engineering Institute “Nikola Tesla” is more than 60 years long. From the very beginning, the experts of the Institute have been active participants in the development of this field, both domestically and internationally. They have contributed to the development of measuring systems and standards for testing and calibration of instrument transformers, which have found application in laboratory calibration of the national metrology laboratories, as well as in industry.

This paper provides an overview of the development of measuring methods for testing and calibration of instrument transformers, as well as a wide range of measuring devices and standards based on different measuring methods. The concrete application of measuring methods in the field of calibration in national institutes of metrology and research metrological laboratories is presented. The paper also presents the application of different measuring devices and systems in the industry, for intermediate and final control of measuring transformers as products in the instrument transformer manufacturers. A special review in this paper is dedicated to the contribution of the experts of the Electrical Engineering Institute “Nikola Tesla” in this field.

Short Bio:

Dragana Naumović Vuković received the Dipl. Ing. degree in Electrical Engineering and the M.Sc. degree from the University of Belgrade, Belgrade, Serbia, School of Electrical Engineering, in 1992 and 1997, respectively. She received her Ph.D. degree from the University of Novi Sad, Faculty of Technical Sciences in 2018. She was with the Institute of Nuclear Sciences, Vinča, Serbia, from 1992 to 1997, and with the Bureau for Measures and Precious Metals, Belgrade, from 1997 to 2003. In 2003, she joined the Electrical Engineering Institute Nikola Tesla, University of Belgrade, Serbia, where she is currently the Head of Calibration Laboratory. Her current research interests include the calibration techniques for instrument transformers and electronic instrumentation, as well as the design and manufacturing of precision test equipment for instrument transformers.