PIC Microcontroller based Grid-tie Interface for Solar Power Systems

Grid-tie interface: This program would allow the solar power system to connect to the grid and sell excess power back to the utility company.

Here is an example of a program code for grid-tie interface using a PIC microcontroller:

This program uses a simple algorithm to allow the solar power system to connect to the grid and sell excess power back to the utility company. It continuously reads the AC output voltage of the solar power system and the grid voltage, and checks if the voltages are within the allowed range. If the voltage is not within the allowed range, it shut down the grid-tie interface, otherwise it starts the grid-tie interface. Then it calculates the excess power which is the difference between the AC output voltage and the grid voltage. If there is excess power, it sends it to the grid.

It's worth noting that this is a simple example of grid-tie interface, and there are many different methods and techniques to design a grid-tie interface, and the specific implementation of the grid-tie interface will depend on the design of the system, grid regulations and the specific requirements of the application.