Abstract
This paper presents a control strategy of a PVBD hybrid system. The PVBD system configuration is introduced and the required control signals are estimated. The sampling rates of each control signal, PV array current signal, load current signal, and battery state of charge signal are determined based on the operation behavior of system components. The driving circuits of the PV array, the battery charger as well as diesel generator status and control are designed and implemented. The system modes of operation under different operating conditions during daylight and night periods are defined, and their operating conditions are determined. The control strategy flow chart is introduced, and the controller management program is developed in assembly language format wherever the controller is 8051 microcontroller-based. The controller program is designed based on the P-controls technique, where the Kp parameter is autotuned to be relevant for weather parameter (mainly insolation) changes. (Author)