Wyniki wyszukiwania - BazTech

1

Optymalny wybór miejsc pomiaru parametrów jakości energii elektrycznej w sieci dystrybucyjnej

Piątek Krzysztof, Dutka Mateusz, Wiczyński Grzegorz, Siostrzonek Tomasz, Chmielowiec Krzysztof

Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

|

2019

|

Nr 67

13--16

PL

Pomiary parametrów jakości energii elektrycznej coraz częściej realizowane są za pomocą rozproszonych systemów pomiarowych obejmujących wiele mierników zainstalowanych w węzłach sieci dystrybucyjnej. W artykule przedstawiono przegląd trzech metod optymalnego wyboru miejsc przyłączenia analizatorów jakości energii elektrycznej. Przedstawiono również wyniki aplikacji tych metod do fragmentu typowej sieci dystrybucyjnej spotykanej na obszarze miejskim.

EN

Measurement of power quality parameters are increasingly carried out using metering system comprising a large number of meters installed in distribution network nodes. From the existing methods for the optimal selection of measurement points, three methods were selected. The results of application to a fragment of a typical distribution network in urban area is also presented. The conclusion is that the selected methods can be useful in selection of measurement locations when distributed power quality metering system is considered. Method no 1 (Won’s and Moon’s method) can be directly used for that purpose bearing in mind its characteristic: that the method ensures full observability of the system by using quite large number of meters.

2

A single-point method based on distortion power for the detection of harmonic sources in a power system

Stevanović D., Petković P.

Metrology and Measurement Systems

|

2014

|

Vol. 21, nr 1

3--14

EN

This paper describes a new and efficient method for quantifying and detection of the source of distortion caused by a single customer in a case when many other customers exist in a power grid. It is based on measuring distortion power, a component of apparent power that only exists with a nonlinear load. Different definitions for distortion power calculation are investigated. All these definitions show without doubt that the proposed method is feasible. Moreover, this method allows to develop fair and reliable billing schemes for controlling harmonic pollution. Measurement and simulation results confirm the effectiveness and applicability of the method. The proposed solution is suitable for software/hardware upgrade of existing electronic power-meters.

3

Load Analyser using Conservative Power Theory

Marafão F. P., Souza de W. A., Liberado E. V., Silva de L. C. P., Paredes H. K. M.

Przegląd Elektrotechniczny

|

2013

|

R. 89, nr 12

1-6

EN

This paper deals with the analysis and application of novel conformity factors, defined by means of the Conservative Power Theory (CPT), for the purpose of load analysis and characterization. Basically, such factors are able to describe the influence of different load characteristic on the power factor calculation and they are valid under generic load and supply voltage conditions. Moreover, the development of a flexible smart-meter prototype has been described and used to the experimental validation of all power components and conformity factors considered on the paper.

PL

W artykule zaprezentowano analizę i zastosowanie nowego współczynnika zgodności zdefiniowanego na podstawie Teorii Zachowania Mocy CPT. Współczynnik zastosowano do analizy obciążeń iich wpływu na współczynnik mocy. Opisano też nową koncepcję miernika typu smart.-meter.

4

A current decomposition-based method for computationally efficient implementation of power resolution meters in non-sinusoidal single-phase systems

Balci M. E., Hocaoglu M. H.

Metrology and Measurement Systems

|

2013

|

Vol. 20, nr 2

263--274

EN

For non-sinusoidal single-phase systems, the classical apparent power has been divided into various components using different techniques. These power resolutions generally aim at to provide a tool for the accurate determination of the maximum power factor achievable with a passive compensator and to measure the load's nonlinearity degree. This paper presents a current decomposition-based methodology that can be employed for computationally efficient implementation of the widely recognized non-sinusoidal power resolutions. The proposed measurement method and the original expressions of the power resolutions are comparatively evaluated by considering their computational complexity. The results show that the proposed method has a significant advantage in terms of computational efficiency for the simultaneous measurements of the powers when compared with the original expressions. Finally, in this paper, a PC-based power meter is developed using the proposed measurement method via the LabVIEW programme.