Evaluation method of power quality in mine supply systems with high-powered high-voltage variable frequency drives

The main adverse effects of higher harmonics in operation modes of power supply systems in mines are discussed. The mathematical and simulation modeling studied nonsinusoidal regimes in mine supply systems with nonlinear loading in the form of high-powered high-voltage variable frequency drives of process unit. The mechanisms of initiation, spreading and change in value of higher harmonics in current and voltage in a power circuit are determined. As a result of the research, a grapho-analytical method is developed to calculate the total harmonic distortion coefficient in mine supply systems with nonlinear loading in the form of variable frequency drives with rectifiers of any number pulse configuration. The obtained relations, convenient for practical calculations, allow evaluation of the total harmonic distortion coefficient for bus voltage in mine supply systems under high-power and high-voltage nonlinear loading, and enable well-reasoned selection of a power source as early as the mine design stage. From the revealed mechanisms, a generalized algorithm is developed for the modeling and analysis of non-sinusoidal regimes in power circuits with variable frequency drives for selecting power equipment given that the rated or required value of the non-sinusoidal voltage coefficient is achieved.

Serikov V. A., Kostin V. N., Sychev Yu. A., Haidar Samet Evaluation method of power quality in mine supply systems with high-powered high-voltage variable frequency drives. MIAB. Mining Inf. Anal. Bull. 2024;(12):162-177. [In Russ]. DOI: 10.25018/0236_ 1493_2024_12_0_162.

V.A. Serikov¹, Cand. Sci. (Eng.), Assistant of Chair, e-mail: Serikov.va@bk.ru, ORCID ID: 0000-0002-2863-000X,
V.N. Kostin, Cand. Sci. (Eng.), Assistant Professor, Leading Specialist, SC «City Center for Expertise», 192102, Saint-Petersburg, Russia, e-mail: kostin_vn@mail.ru,
Yu.A. Sychev¹, Dr. Sci. (Eng.), Assistant Professor, e-mail: ya_sychev@mail.ru, ORCID ID: 0000-0003-0119-505X,
Haidar Samet, Dr. Sci. (Eng.), Professor, School of Electrical and Computer Engineering, Shiraz University, Shiraz, Iran, e-mail: hsamet@gmail.com, ORCID ID: 0000-0003-1367-3872,
¹ Empress Catherine II Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.

V.A. Serikov, e-mail: Serikov.va@bk.ru.

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