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Mohd Hatta Jopri
Mohd Hatta Jopri
Ph.D., Associate Professor
Universiti Teknikal Malaysia Melaka
, Ph.D., Associate Professor
Universiti Teknikal Malaysia Melaka
Melaka
Malaysia

Articles

Energy industry
  • Date submitted
    2022-10-26
  • Date accepted
    2023-02-13
  • Online publication date
    2023-05-04
  • Date published
    2023-07-19

Determination of the grid impedance in power consumption modes with harmonics

Article preview

The paper investigates the harmonic impedance determination of the power supply system of a mining enterprise. This parameter is important when calculating modes with voltage distortions, since the determined parameters of harmonic currents and voltages significantly depend on its value, which allow the most accurate modeling of processes in the presence of distortions in voltage and current. The power supply system of subsurface mining is considered, which is characterized by a significant branching of the electrical network and the presence of powerful nonlinear loads leading to a decrease in the power quality at a production site. The modernization of the mining process, the integration of automated electrical drive systems, renewable energy sources, energy-saving technologies lead to an increase in the energy efficiency of production, but also to a decrease in the power quality, in particular, to an increase in the level of voltage harmonics. The problem of determining the grid harmonic impedance is solved in order to improve the quality of design and operation of power supply systems for mining enterprises, taking into account the peculiarities of their workload in the extraction of solid minerals by underground method. The paper considers the possibility of determining the grid impedance based on the measurement of non-characteristic harmonics generated by a special nonlinear load. A thyristor power controller based on phase regulation of the output voltage is considered as such a load. Simulation computer modeling and experimental studies on a laboratory test bench are used to confirm the proposed method. The recommendations for selecting load parameters and measuring device connection nodes have been developed.

How to cite: Skamyin A.N., Dobush V.S., Jopri M.H. Determination of the grid impedance in power consumption modes with harmonics // Journal of Mining Institute. 2023. Vol. 261. p. 443-454. DOI: 10.31897/PMI.2023.25