A STUDY ON THE FEASIBILITY AND EFFECTIVENESS OF DIGITAL FILTER APPLICATION FOR HARMONIC AND INTERHARMONIC MEASUREMENT IN COMPLIANCE WITH IEC 61000-4-7<br />
Journal Title: Metrology and Measurement Systems - Year 2007, Vol 14, Issue 4
Abstract
Large scale monitoring of power quality in electrical power plants is nowadays a pressing need due to the liberalization of the electrical market in many countries and the deeper interconnections of electrical networks. Many instruments are today available on the market. Even if they provide good accuracy and measurement capability, they are generally developed for single point measurements. Their use in large scale monitoring leads to high costs. In this framework research activity, the authors aim at the realization of a measurement instrument for power quality monitoring in compliance with IEC 61000-4-30 and 61000-4-7 standards capable of granting good accuracy, satisfying repeatability, and cost effectiveness since the use in large scale monitoring is allowed. In this paper the attention is paid to the measurement algorithm to be adopted. The use of an alternative measurement approach with respect to the FFT one is proposed. Digital filters shaped on the harmonic group are thoroughly optimized for grouping measurements required by the IEC EN 61000-4-7 standard both in simulation and emulation environments. The obtained results confirm the advantages of the proposal.
Authors and Affiliations
L. FERRIGNO, C. LANDI, M. LARACCA
Keywords
Related Articles
- EP ID EP91480
- DOI -
- Views 87
- Downloads 0
CHARACTERIZATION OF DEAD WEIGHT TESTERS AND COMPUTATION OF ASSOCIATED UNCERTAINTIES: A CASE STUDY OF CONTEMPORARY TECHNIQUES<br />
Estimation of uncertainty associated with pressure, measured by a dead weight tester is a key issue of recent times in pressure metrology. Though two different techniques have been used in the past yet there has been lit...
ADC AND DAC MODELLING AND TESTING STATE OF THE ART
The analog to digital front ends of measuring instruments affect crucially the interpretation of the signals acquired from the real world into the digital domain and their back presentation. The signal processing in the...
A MULTI-METHOD APPROACH TO MEASUREMENT OF RESPIRATORY SYSTEM MECHANICS
A multi-method system developed for complex investigations of lung mechanics is described. The system includes complementary measurement techniques such as forced oscillations, interrupter technique, methods for measurem...
DYNAMICS OF CONTACT THERMOMETRIC SENSORS WITH ELECTRIC OUTPUT AND METHODS OF ITS IMPROVEMENT
The paper deals with selected aspects of modelling dynamic properties of contact thermometric sensors and reducing the dynamic error occurring in measurement of time-variable temperature as well as in measurement of cons...
DYNAMIC MEASUREMENT OF THE CURVE y(x) DEFINED BY PARAMETRIC RELATIONS x(t), y(t) UNDER RANDOM DISTURBANCES
Analog XY-recorders constructed as servomechanisms with sliding motion have been practically out of use for some time. Drawing the curve y(x) defined by parametric relations xz(t), yz(t) under additive, random disturbanc...