Implementation of Fuzzy-PI Controller for Constant Voltage Battery Charging System Using Zeta Converter

Utilization of solar energy using solar panels is an alternative in the use of renewable energy sources. The characteristics of solar panels greatly affect the efficiency in obtaining optimal power points by reaching maximum power so that the resulting output voltage changes. In this case to maximize the maximum power of the solar panels Zeta converter is needed as a DC-DC converter so that one of the main limitations of the converter is constant output voltage. In solving the problem, a Fuzzy Control Logic (FLC) controller is needed which is set by the PI controller to track the setpoint response and reject interference due to external factors. The results of the comparative study show that FLC with PI control is superior to other strategies because of the fast transient response so that it is suitable to maximize the battery charging process with high efficiency of approximately 89%.