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similare conform CZU
| SM ISO690:2012|
VIERU, Dmitrii. Research on the impact of distributed generation on slow changes of voltage profiles in low voltage electrical networks. In: Problemele Energeticii Regionale. 2020, nr. 3(47), pp. 20-28. ISSN 1857-0070.
|Problemele Energeticii Regionale|
|Numărul 3(47) / 2020 / ISSN 1857-0070|
The article considers the issue of assessing the impact on the mode of the share of distributed generation, after connecting of low-power photovoltaic installations to the low-voltage network. The purpose of the article is to substantiate the procedure for calculating the mode in an electric network with loads and distributed generation sources to assess the change in the voltage profile in the transmission line depending on the generating power of photovoltaic installations and changes the load curve in the networks. For the analysis of the network regime it was proposed to use the loop currents method. This from the start highlights the currents in loads and the currents of the sources the network. The matrix form for presenting the voltage equilibrium equations was applied, which was also used to calculate the loop currents of the power line circuits. The object of the research was selected the low voltage power line presented in the single-wire topology with distributed loads and sources, which includes 24 consumers and 24 generation sources. A lower impact of distributed generation has been established with smaller in-line voltage deviations at low consumption, and at high consumption the voltage deviations can exceed the allowable values stipulated in the normative documents. Following the limitation of these deviations in the limit of the admissible values, the recommendation was formulated to limit the power of the distributed sources to the level of about 30% of the power consumed in the peak hours. This will maintain electricity quality indices in all load regimes.
loop current method, power quality, voltage deviation, power limitation of generation sources,
metoda curentului buclei, calitatea puterii, abaterea tensiunii, limitarea puterii surselor de generare,
метод контурных токов, качество энергии, отклонение напряжения, ограничение мощности источников генерации