DOI: https://doi.org/10.15407/techned2019.01.068

JUSTIFICATION FOR USE OF VOLTAGE CLASS 20 KV IN URBAN ELECTRICAL NETWORKS

Authors
R.O. Buinyi¹*, A.V. Krasnozhon¹, V.V. Zorin²**, A.O. Kvytsynskyi^3
1 – Chernihiv National University of Technology,
str. Shevchenka, 95, Chernihiv, 14035, Ukraine,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
² – NTUU «I. Sikorsky Kyiv Polytechnic Institute»,
pr. Peremohy, 37, Kyiv, 03056, Ukraine,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
³ – Research & design center for development of the IPS of Ukraine,
str. Dorohozhytska, 11/8, Kyiv, 04111, Ukraine,
e-mail: Kvytsynskyi.AO@ua.energy
* ORCID ID : http://orcid.org/0000-0002-5432-2924
** ORCID ID : http://orcid.org/0000-0001-5913-401X

Abstract

For biradial power supply networks it was derived an objective function that allows to analyze the effect of technological and economic factors on the efficiency of power supply. It was found that utilizing the voltage class of 20 kV in the urban power supply networks would be efficient only when they are constructed with transformers of unit capacity 630 kVA and aluminum cables of 240 mm² or larger cross-section. Analytic expressions were derived and visualizations were created to analyze minimal specific density of electric load and maximum distance between electric substations for which construction of power supply network of 20 kV is justified as a function of allowed outage time for the network. References 6, figure 3.

Key words: power supply network, biradial structure, economic efficiency, integral effect, payback period, objective function, power loss.

Received:    02.03.2018
Accepted:    18.05.2018
Published:   10.01.2019

References

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