Adaptive PID Control of DC-link Voltage via DC/DC Buck-Boost Converter
نویسنده
چکیده
Thammasat International Journal of Science and Technology, Vol. 18, No. 2, April-June 2013 42 Abstract Mainly, a photovoltaic (PV) system is able to generate wide ranges of voltage and current at terminal output. However, a PV cell is required to functionally maintain a constant direct current (DC) voltage at a desired level during real-time variations of incident light illumination and ambient temperature. To obtain this goal, a power electronic convertor, that is a DC/ DC converter together with control scheme topology, is implemented in this study. However, a conventional linear PID control law is not suitable to be an effective controller for regulating the output voltage of a DC/DC converter due to nonlinearity. An adaptive PID control scheme is proposed to stabilize the output voltage of the DC/DC converter, in order to maintain and stabilize the constant DC-link voltage in power line and load variations. The results of steady state and transient responses show that the performance of the proposed control scheme is more efficient than the conventional PID control scheme. Adaptive PID Control of DC-link Voltage via DC/DC Buck-Boost Converter
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