Hello Ayaz,
Matlab has code for implementing genetic algorithsm to optimize cost functions. You will need to choose your cost function and how you want to use that for voltage regulation. You can then use this function to solve the cost function: https://www.mathworks.com/help/gads/ga.html
Also, please look at this example: https://www.mathworks.com/matlabcentral/fileexchange/73580-pv-system-with-optimization-algorithms
Regards,
Joel
