Direct model predictive current control strategy of quasi-Z-source inverters.

This paper presents a direct model predictive current control (MPC) strategy for quasi-Z-source inverters (qZSIs). A discrete-time model is derived that accurately captures all operating modes of the converter. Both sides of the qZSI are controlled simultaneously based on the inductor current and capacitor voltage on the dc side as well as the output current on the ac side. To improve the closed-loop performance of the converter, a long prediction horizon is implemented. However, the underlying optimization problem may become computationally intractable because of the substantial increase in the computational power demands, which in turn would prevent the implementation of the control strategy in real time. To overcome this and to solve the problem in a computationally efficient manner, a branch-and-bound strategy is used along with a move blocking scheme. Simulation and experimental results are provided to verify the effectiveness of the presented control strategy.     «

This paper presents a direct model predictive current control (MPC) strategy for quasi-Z-source inverters (qZSIs). A discrete-time model is derived that accurately captures all operating modes of the converter. Both sides of the qZSI are controlled simultaneously based on the inductor current and capacitor voltage on the dc side as well as the output current on the ac side. To improve the closed-loop performance of the converter, a long prediction horizon is implemented. However, the underlying...     »

Inverters, Capacitors, Inductors, Computational modeling, Switching frequency, Predictive models, Switches, closed loop systems, electric current control, invertors, optimisation, predictive control, tree searching, direct model predictive current control strategy, MPC strategy, quasi-Z-source inverters, qZSI, discrete-time model, inductor current, capacitor voltage, closed-loop performance, computational power demands, branch-and-bound strategy, move blocking scheme, Branch-and-bound, long prediction horizon, model predictive control (MPC), move blocking, quasi-Z-source inverter (qZSI)     «

Inverters, Capacitors, Inductors, Computational modeling, Switching frequency, Predictive models, Switches, closed loop systems, electric current control, invertors, optimisation, predictive control, tree searching, direct model predictive current control strategy, MPC strategy, quasi-Z-source inverters, qZSI, discrete-time model, inductor current, capacitor voltage, closed-loop performance, computational power demands, branch-and-bound strategy, move blocking scheme, Branch-and-bound, long...     »