Study on IMC-PID control for single-phase voltage-source UPS inverters

A novel control scheme with PD output voltage instantaneous-value feedback inner loop for voltage-source inverter is proposed. The inner loop is designed to improve dynamic performance and the IMC-PID (internal model control-proportion integral derivation) external loop can ensure stable performance. The design methods of inner loop PD controller based on pole-assignment and external loop IMC-PID controller are discussed in detail. The control system is very simple and only the output voltage needs to be sampled. The PD inner controller and IMC-PDD external controller are both easy to design and analyze. Simulation and experimental results are given to validate that the control scheme for voltage-source inverter proposed has not only nice dynamic and static performance but also strong robustness. The control scheme proposed has not only strong robustness, nice dynamic and static characteristics, but also easy to realization of the control algorithm in analog or digital.