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Analysis of the quality of electricity on the basis of the results of the research model of low voltage line

Kolber P., Perczyński D., Landowski B.

Journal of Polish CIMAC

2012

Vol. 7, no 3

89-96

The work shows a model of a low voltage line (LV), loaded asymmetrical (asymmetry load), feeding scattered customers. The object of the research is an LV line supplying rural customers. Analysis of the tests results of the built model allows among others, evaluation of the values that characterise the quality of the electricity supplied to customers and the parameters that describe the objective of the research. In order to assess the quality of electricity (provided to customers) the algorithm calculation was compiled and on the basis of the developed model, it is possible to calculate the values of voltage sags and deviations on the individual points of the line. In addition, it enables the designation of the asymmetry of voltage (the coefficients of voltage asymmetry). The figures characterising the quality of electricity can be appointed to different parameters describing an LV, inter alia, distribution of customers along the line, what type of customers are connected to the line (productive and unproductive), the nature and extent of the load and the degree of load asymmetry.

Simulation model to evaluate voltage asymmetry in a rural low voltage power line

Kolber P., Piechocki J.

Technical Sciences / University of Warmia and Mazury in Olsztyn

2008

nr 11

77-86

This paper presents a simulation model to evaluate phase voltage unbalance in rural local low voltage power lines. The voltage asymmetry has been evaluated by the voltage asymmetry coefficient value [alpha]U2, being one of the essential parameters characterizing quality of electric energy supplied from a low voltage power line to the consumers.

W artykule przedstawiono symulacyjny model oceny niezrównoważenia napięć fazowych w terenowych wiejskich liniach niskiego napięcia. Niesymetria napięć była oceniana przez wartość współczynnika asymetrii napięciowej [alfa]U2, który jest jednym z podstawowych parametrów charakteryzujących jakość energii elektrycznej dostarczanej do odbiorców z linii niskiego napięcia.