Plenary Lecture

Computer-Aided Simulation Methods for Measuring the Accuracy of Converters

Professor Costin Cepisca
Faculty of Electrical Engineering
POLITEHNICA University of Bucharest
Romania
E-mail: costin.cepisca@upb.ro

Abstract: The measurement information systems make use of different converters whereby the link between the signal converters and the system bus impose structural and algorithmic methods for increasing accuracy.
The simulation methods are applied for measurement of powers and energies in electrical networks using instrument transformers. The transformers allow the measurement of the effective value but, in certain cases, one can note errors in the measurement of the electric power and energy.
In most practical cases a current transformer consists of a traditional instrument with magnetic core. Accuracy specifications of these devices are generally assured under sinusoidal conditions. When distorted waveforms are dealt with, CTs can introduce large uncertainties, thus leading to gross measurement errors.
A variety of techniques is reported for improving the performance of instrument transformers. In many cases they refer to hardware circuits for electronically compensated devices. More recently, several different software compensation techniques have been introduced for limiting the errors. Following a similar approach, digital compensation methods have been proposed to significantly reduced hysteresis and eddy currents effects.
In the present paper, we present different models of current transformers and computer methods for the simulation of characteristics and evaluation of measurement errors, with the goal of increasing the measurement accuracy.

Brief Biography of the Speaker:
Costin Cepisca was born in Bucharest, Romania, on May 21, 1949. He received the degree in electrical engineering (1972) and the Ph.D. (Dr.ing.) from Bucharest Polytechnic Institute in 1983.
He is currently Professor of measurement systems at the POLITEHNICA University of Bucharest, Head of Research Centre for Metrology and Measurement Systems and former Vice-Dean of Faculty of Electrical Engineering.
His present research interest includes the sensor interface systems, analogue circuit design and signal processing, measurement theory and power quality. He has published more 600 technical papers and 60 books and has been involved in numerous government and industrial projects in area of measurements and instrumentation.