Mining of Mineral Deposits

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Adaptive control of power receivers supply voltage in underground mines

Oleh Sinchuk1, Oleksii Mykhailenko1, Ihor Sinchuk1, Maryna Kotiakova1, Vladyslav Baranovskyi1, Mila Baranovska1

1Kryvyi Rih National University, Kryvyi Rih, Ukraine


Min. miner. depos. 2025, 19(4):119-129


https://doi.org/10.33271/mining19.04.119

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      ABSTRACT

      Purpose. This research aims to synthesize an automated system for stabilising the supply voltage of individual electrical consumers at iron ore mines when it deviates from standardised values due to unpredictable disturbances in the mine power systems.

      Methods. A dynamic voltage restorer was used to stabilize the supply voltage of mine electrical consumers. The basic control system for the dynamic voltage restorer was developed using control theory methods, such as linear-quadratic control. Heuristic optimization methods were used to adapt the linear-quadratic regulator to unpredictable disturbances. The control integral absolute error was taken as the criterion. Numerical analysis was used to check the quality of transients during voltage stabilization using the proposed system.

      Findings. The adaptive control system for a dynamic voltage restorer has been developed to stabilize the supply voltage of individual electrical consumers at iron ore mines. The optimal genetic algorithm parameters have been determined, including the population size and mutation rates of the linear-quadratic regulator weight matrices. It minimizes the integral absolute error and, as a result, eliminates overshoot (overshoot is no more than 0.058%) and reduces the transient time (up to 95%) compared to the unoptimized system.

      Originality. The method of adaptive automated linear-quadratic regulator tuning based on a genetic algorithm is proposed. For the first time, it is used to control a dynamic voltage restorer installed between the power grid and the mine electrical consumer. This method has enabled the compensation of fluctuations in the mine power grid voltage at the consumer end, without overshoot and with short settling times.

      Practical implications. The results can be used for the development of digital controllers embedded firmware for dynamic voltage restorers, providing real-time voltage fluctuation compensation and improving the power supply quality to mine electrical consumers.

      Keywords: underground mine, power system, voltage control, dynamic voltage restorer, linear-quadratic regulation, genetic algorithm


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