A plug-in digital repetitive learning (RC) controller is proposed to eliminate periodic tracking errors in constant-voltage constant-frequency (CVCF) pulse-width modulated (PWM) DC/AC converter systems. The design of the RC controller is systematically developed and the stability analysis of the overall system is discussed. The periodic errors are forced toward zero asymptotically and the total harmonics distortion (THD) of the output voltage is substantially reduced under parameter uncertainties and load disturbances. Simulation and experimental results are provided to illustrate the validity of the proposed scheme.
Inspec keywords: learning systems; discrete time systems; uncertain systems; digital control; DC-AC power convertors; PWM power convertors; stability
Other keywords: total harmonics distortion; periodic errors elimination; constant-voltage constant-frequency pulse-width modulated DC/AC converter systems; CVCF PWM DC/AC converter systems; parameter uncertainties; stability analysis; repetitive control approach; load disturbances; output voltage; plug-in digital repetitive learning controller
Subjects: Stability in control theory; Control of electric power systems; Power convertors and power supplies to apparatus; Self-adjusting control systems; Control engineering computing; Power engineering computing; Discrete control systems
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