SIMULATION OF A MICROCONTROLLER BASED BATTERY CHARGER WITH REACTIVE POWER CONTROL

ABSTRACT

This project is aimed at the simulation of a microcontroller based battery charger with reactive power control. The simulation for the battery charger was done on Proteus with the use of the PIC16F877A microcontroller. A contact relay is use to cut of charging current to the battery when it is full. LED indicators are also present to signify if the battery is being charged or not. After the battery is charged, it is converted to AC by the use of an inverter circuit. Another PIC16F877A microcontroller is used in this part of the circuit. Relays are used to determine the level of compensation of the reactive power needed in the circuit by connecting or disconnecting capacitors from the circuit. A Liquid Crystal Display (LCD) is implemented to show the power factor after compensation. At the end of the project, the simulation worked as expected, for the battery charger, the indicators corresponded smoothly (without delay) with the state of charge of the battery. The reactive power was controlled as we varied the load to the reactive power control circuit