Computation of the Zero-Wire Current under an Asymmetric Nonlinear Load in a Distribution Network

Energy Reports 2022
Shokhin Dzhuraev, Svetlana Berjozkina, Mukhammadzhon Kamolov, Murodbek Safaraliev, Inga Zicmane, Khurshed Nazirov, Sherkhon Sultonov

Recently the electrical receivers with a nonlinear volt–ampere characteristic have increased significantly in utility electrical networks. The authors suggest applying a detailed account of their characteristics to analyze asymmetric/non-sinusoidal operating mode on an external electrical network. This paper is devoted to the problem of calculating the current level in a zero wire with an asymmetric operating mode of utility electrical networks containing such electrical receivers. A simulation model of the 0.4 kV network section of the urban electrical networks of Dushanbe has been developed. It is shown that a consideration of the higher harmonic components of the zero-sequence current is required, which is not a multiple of three. An algorithm for calculating the harmonic component of the zero-wire current has been also developed to determine the heating temperature of a cable. The obtained results make it possible to correctly select the cross-section of the zero wire of the cable line in the 0.4 kV distribution network for feeding a non-sinusoidal/asymmetric load.

Keywords
Asymmetry; Electric receiver; Higher current harmonics; Modeling; Non-sinusoidality; Nonlinear load; Power quality; Zero wire
DOI
10.1016/j.egyr.2022.09.176
Hyperlink
https://www.sciencedirect.com/science/article/pii/S235248472201900X?via%3Dihub

Dzhuraev, S., Berjozkina, S., Kamolov, M., Safaraliev, M., Zicmane, I., Nazirov, K., Sultonov, S. Computation of the Zero-Wire Current under an Asymmetric Nonlinear Load in a Distribution Network. Energy Reports, 2022, Vol. 8, No. 8, pp.563-573. ISSN 2352-4847. Available from: doi:10.1016/j.egyr.2022.09.176

Publication language
English (en)