ON-LINE INSTANTANEOUS FREQUENCY ESTIMATION AND VOLTAGE/CURRENT COHERENT RESAMPLING METHOD
Journal Title: Metrology and Measurement Systems - Year 2005, Vol 12, Issue 1
Abstract
An innovatory on-line method of power system frequency estimation and voltage/current signals resampling is presented. The method is designed to increase the accuracy of power system equivalent harmonic impedance estimation using simple DAQ systems. Estimation of instantaneous frequency uses 5-th degree polynomial interpolation of filtered signal zero crossings time positions. Final resampling uses cubic splines interpolation for the calculation of output signal values. The details of resampling algorithm are described. The results of simulation tests demonstrating the typical behavior of a power system were shown as well as results of real voltage signal resampling. The method shows good capabilities of tracking varying harmonic phase angles in reference to the fundamental one while phase/frequency of fundamental harmonic varies too. The computational complexity allows to implement the method as a realtime version on DSP. Comparison of the amount of math operations used in this and another method [1] is shown too.
Authors and Affiliations
DARIUSZ BORKOWSKI
Keywords
Related Articles
- EP ID EP149822
- DOI -
- Views 71
- Downloads 0
A TRANSDUCER INTERFACE FOR RESISTIVE SENSOR ELEMENTS BASED ON THE USE OF A FLIP-FLOP<br />
This paper presents a new transducer interface. This interface serves the resistive bridges. The A/D conversion is based on the use of an auto-compensatory system with two digital-to-analog converters (DACs). A new measu...
RECTIFICATION
Unfortunately, in the issue number 1/2006 Metrology and Measurement Systems in the article: Zygmunt L. Warsza “Two-parameter measurements and signal conditioning in double – current supply four – terminal resistance circ...
ESTIMATION OF YOUNG'S MODULUS AND ADHESIVE FORCE OF POLYMERIC FILMS BY USE OF ATOMIC FORCE MICROSCOPE
Nowadays a big interest exists in microengineering forces to study and test microsystems and their components. There exist a lot of methods and tools to perform this kind of investigations. Most of them need good skills,...
INTELLIGENT CYCLIC ADC. PRINCIPLES OF FUNCTIONING, OPTIMISATION AND ANALYSIS
The aim of the paper is a presentation of conceptual backgrounds of a new approach to design and analysis of high-efficient intelligent analog-to-digital converters (ADC). Particularities of intelligent conversion, metho...
INFLUENCE OF SELECTED FACTORS FOR LOCALIZATION ACCURACY IN THE OPTICAL VORTEX INTERFEROMETER
Optical vortices were intensively studied during the last decade. In the literature there are papers presenting applications of the optical vortices. The regular net of optical vortices generated by the three plane waves...