Predictive Relay-Vector Control of Active Current Converters
Purpose: Structural development and synthesis of automatic control system regulators for an active two-unit current frequency converter improving the dynamic performance of its work. Results: On the basis of predictive relay-vector control strategy, functional and structural schemes of an automatic control system for an active two-unit current frequency converter were designed. Regulators of net currents and output voltages of the frequency converter were synthesized. In accordance with a mathematical description of an active current frequency converter's automatic control system, a simulation program was developed in Delphi, which analyzes the energetic and dynamic characteristics of the converter. The results of a mathematical simulation and experimental tests of a converter's mockup are presented. Practical relevance: Algorithms of predictive relay-vector control used in the frequency converter instead of pulse-width modulation algorithms can simplify the automatic control system structure. The proposed procedure of synthesizing predictive relay-vector regulators is simple and well-adapted to chip implementation. The control algorithms guarantee a considerable decrease in the reactive elements of the two-unit frequency converter and an increase in its dynamic performance.