Grid-tied variable frequency facility

A method of operating a micro grid system, the micro grid comprising a secondary energy source and a power controller in communication with the secondary energy source and an electric grid, the method comprising:

• generating a first DC power signal with the secondary energy source;
• outputting, with the power controller that is configured to receive the first DC power signal from the secondary energy source and a first AC power signal from the electric grid, a second AC power signal to be supplied to loads associated with the micro grid system;
• and
• modifying frequency of the second AC power signal, wherein modifying the frequency of the second AC power signal includes:
• obtaining characteristics of the second AC power signal on a path between the power controller and the loads;
• calculating load to be operated based on the characteristics;
• generating, with the power controller, a control signal based on the calculated load;
• and
• modifying, with a frequency converter, the frequency of the second AC power signal supplied to the loads based on the control signal.

A power controller for operating a micro grid system, the micro grid system comprising a secondary energy source configured to generate a first DC power signal, the power controller in communication with the electric grid and the secondary energy source, the power controller comprising:

• a frequency converter comprising an AC-DC inverter configured to receive a first AC power signal from the electric grid and to convert the first AC power signal to a second DC power signal, and a first inverter configured to convert at least one of the first and the second DC power signals into the second AC power signal and to supply the second AC power signal to loads associated with the micro grid system;
• a processor;
• and
• a memory configured to store instructions that, when executed, cause the processor to control the frequency converter to change frequency of the second AC power signal supplied to the loads associated with the micro grid system.