Abstract
This paper takes the three-phase VIENNA rectifier as the research object. Aiming at the problem that its dq-coordinate system model has strong coupling and nonlinear characteristics, which makes the design of the controller system more difficult, a control strategy based on feedforward decoupling control is proposed. First, this paper analyzes the working principle and mathematical model of the rectifier, then introduce the newly proposed control system and controller parameter design, and finally build a simulation model with PESIC software. The simulation results verify the correctness and rationality of the proposed feedforward decoupling control. The proposed control strategy can further reduce the harmonic content of AC side of the rectifier, improve the steady-state performance, and have better dynamic performance when the load power changes.
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