A Laboratory Setup for Testing Frequency Estimation Algorithms Implemented on Real-Time Target

Abstract

In this paper a low-budget single-phase voltagewaveform simulator based on the NI PCI-6071E DAQ card anddesktop PC with real-time Phar Lap operating system has beenpresented. Program for generating waveforms in accordanceto the IEC standard 61000-4-13, with harmonics of variablefrequency, amplitude and phase, has been implemented in theLabVIEW RT environment. Calibration of DAQ card internalclock has been performed to increase the accuracy of the gener-ated voltage waveform frequency. In order to achieve consistentsystem operation, DAQ card internal temperature sensor hasbeen used to compensate clock frequency drift caused by localambient temperature variations. For verification purposes, oneof algorithms for the frequency estimation based on the linearKalman filter has been deployed to target PC. Experimentalresults in steady-state and dynamics have also been presented.The estimated frequency of the generated signal matches verywell with the values obtained by the digital multimeter used forcalibration procedure.

Goran Petrović

Full Professor | Department of Electrical Measurements

Prof. dr. sc. Goran Petrović is a full professor at the Faculty of Electrical Engineering, Mechanical Engineering and Architecture in Split. His research interests include measurement of electrical and process quantities, analysis of geoelectrical and geothermal features of the soil, instrumentation for smart grids, measurement and application of synchrophasors. He is the author of numerous papers published in top-tier scientific journals and contributed to valuable international and national scientific projects.

Marin Despalatović

Full Professor | Department of Electrical Drives and Industrial Control

Full professor at the Faculty of Electrical Engineering, Mechanical Engineering, and Naval Architecture in Split, where he teaches courses Electric Machines, Electric Drive Systems, and Electromechanical System Modeling. His research focuses on power systems, energy storage, and smart grid technologies, with active participation in multiple national and international projects aimed at advancing energy infrastructure and improving system stability.