Optimization approach to reduce the negative impact of high harmonic components of currents and voltages in high-voltage mine networks

Abstract

The article presents an analysis of the work of the high-voltage mine network, which confirms the presence of higher harmonic components of currents and voltages of significant magnitude and their negative impact on the elements of the power supply system. The most pronounced higher harmonics of currents and voltages in the high-voltage mine network, as well as the most probable ranges of load currents and distortion currents are revealed. It is proved that the load change in the mine network as a function of time refers to random processes. The mathematical apparatus of the theory of random processes was used to study and predict load currents and distortion currents. The obtained quantitative values of trends of load currents and distortion currents were used in the estimation of power losses and in the calculation of parameters of filter compensating devices. An optimization approach is proposed to reduce the negative influence of higher harmonic components of currents and voltages, based on minimizing the target function of additional active power losses from the action of higher harmonics. To reduce the negative impact of higher harmonic components of currents and voltages in the high-voltage mine network, it is proposed to use two resonant passive filters tuned to the 11-th and 13-th harmonics, and a second-order broadband filter tuned to compensate harmonics, starting from the 23-rd and above.