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Algorithm for Designing a Second-order Multiband Crossover Filter in Control Systems of Frequency Converters

This article proposes an algorithmic implementation of a second-order crossover filter designed to implement an active harmonic correction system for an industrial three-phase supply network. Nowadays, quite serious requirements are imposed on the quality of the supply network used to power consumers. In this case, active filter systems are designed to stabilize the frequency response of the supply network, however, today, individual technological features of the implementation of such devices are not always optimal and lead to a significant increase in the cost of technical implementation and limiting the scope of such filters. One such problem is the inefficient use of the power of the compensation system to correct high-order harmonics and the need for high modulation frequency of the filter power components. As a solution to the above problem, it is proposed to use a crossover active current filter for separate zone compensation of harmonics for different orders.