Unified robust zero-error tracking control of CVCF PWM converters

Abstract

This paper proposes a unified robust zero-error tracking control scheme for constant-voltage-constant-frequency (CVCF) PWM converters to eliminate the tracking error in the presence. Based on the internal model principle, the proposed control scheme plugs a reference signal generator into the stable conventional feedback closed-loop system to accomplish zero error tracking of the dc or ac reference input. The design of the unified zero error tracking controller is systematically developed and the stability analysis of overall control system is discussed. Three examples of the proposed controlled CVCF converters, such as CVCF PWM inverter, boost-type PWM rectifier, and dc-dc PWM buck converter are studied to testify the validity of the proposed approach. Simulation and experimental results demonstrate satisfactory performance of the proposed unified robust zero error tracking controller even under parameter uncertainties and load disturbances.

Design of Photovoltaic Generation Grid-Connected Inverter Based on DSP

“…The method of perturbation and observation is to join a perturbation based on the controlled voltage given a value TMS320F2812 processor chip has clock modules based on a phase-locked loop (PLL), PLL is a closed-loop feedback tracking and controlling system, the frequency of the output signal tracks the input signal frequency. When the output signal has the same frequency with the input signal, there is a fixed phase difference between the output voltage and input voltage, which can be used to control operating frequency of DSP core, and provide all the necessary clock signal for the processor, moreover track frequency [4] and phase [5][6] in real-time, the specific process is shown in Figure 7.…”