Nonsinusoidal modes in power-supply systems with nonlinear loads and capacitors in mining

The mathematical, simulation and physical modeling is undertaken to analyze the nonsinusoidal modes in power-supply systems of concentration factories and tailings facilities, under nonlinear loading during daily variation in the intensity of the linear and nonlinear loading, with regard to the presence of a capacitor to compensate the reactive power of the linear load. The basic patterns of the initiation, diffusion and change of the higher current harmonics in the standard power-supply systems of concentration factories and tailings storages equipped with transformers of different capacity, voltage and design are found. Based on the research findings, the requirements on precision as well as allowable assumptions and constraints are formulated for modeling of resonance processes in the nonsinusoidal modes toward the justified selection of the solutions and equipment for the higher quality power in terms of reduced higher harmonics of current and voltage. On the ground of the found patterns, the recommendations are given to abate the adverse effect of the higher current harmonics due to the nonlinear load on the power-supply system components, in particular, capacitors, and on the quality of voltage in linear loading. Using the research results, the generalized algorithm is developed for the modeling and analysis of the nonsinusoidal modes toward the validated choice of the solutions or equipment to improve power quality.

Sychev Yu. A. , Kostin V. N., Serikov V. A., Aladin M. E. Nonsinusoidal modes in power-supply systems with nonlinear loads and capacitors in mining. MIAB. Mining Inf. Anal. Bull. 2023;(1):159-179. [In Russ]. DOI: 10.25018/0236_1493_2023_1_0_159.

Yu.A. Sychev¹, Dr. Sci. (Eng.), Assistant Professor, e-mail: ya_sychev@mail.ru, ORCID ID: 0000-0003-0119-505X,
V.N. Kostin¹, Cand. Sci. (Eng.), Assistant Professor, e-mail: kostin_vn@mail.ru, ORCID ID: 0000-0003-2124-8438,
V.A. Serikov¹, Graduate Student, e-mail: serikov.va@bk.ru, ORCID ID: 0000-0002-2863-000X,
M.E. Aladin¹, Graduate Student, e-mail: m.aladyin@gmail.com, ORCID ID: 0000-0002-0706-1266,
¹ Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.

M.E. Aladin, e-mail: m.aladyin@gmail.com.

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