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This work introduces the input-output feedback Linearization controller for a three-level boost rectifiers, which presents a fast step response at the input current maintaining the dc-bus voltage balanced. A detailed modelling and linearization procedure is presented and then a state feedback controller is designed via pole-placement technique to render a simple and direct digital control. Finally,...
This work introduces a Generalized Predictive Control (GPC) for Three-Level Boost Rectifiers, which presents a fast step response at the input current maintaining the grid-tie inverter dc-bus voltage balanced. Also, its design procedure includes model mismatch robustness criteria. Finally, the proposed controller is compared against a classical PI controller.
This work presents a control strategy for grid-connected voltage source inverters in Distributed Power Generation. The proposal combines two control loops, an internal loop based on the Robust Predictive Current Control (RPCC) and an external proportional-resonant with harmonic compensators (PR+HC) to achieve high rejection to external perturbations and improve grid current THD in steady state. The...
This work presents a dead-time compensation technique for robust predictive current control of grid-connected voltage source inverter. Among current controls, dead-beat predictive controllers are one of the fastest, but are extremely sensitive to inconsistencies between the model and the actual plant. Dead-time modifies the plant model and is one of the main sources of distortion in high dynamic range...
A new type of linear-programming based Model Predictive Control (LP-MPC) is presented in this work. The MPC optimization process is reformulated as a linear programming problem and solved using the Simplex method. The optimization result is the duty cycle of a fixed-frequency pulse width modulator (PWM) which switches the transistors of a three-phase grid-connected voltage source inverter. In opposition...
This paper presents a self tuning robust predictive current controller that can be applied to both single and three phase grid tie voltage source inverters. Due to its adaptive capability, this control has a great robustness to paremetric variations, presents low steady-state current error and lowers dead time distortion in contrast with its nonadaptive variant (RPCC). Both simulation and experimental...
This study presents a new software-based plug-in dead-time compensator for grid-connected pulsewidth modulated voltage-source inverters of single-stage photovoltaic (PV) systems using predictive current controllers (PCCs) to regulate phase currents. First, a nonlinear dead-time disturbance model is reviewed, which is then used for the generation of a feed-forward compensation signal that eliminates...
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