Utility interactive AC module photovoltaic system with frequency tracking and active power filter capabilities

This paper describes an AC module solar PV generation system, a relatively new PV system technology that is intended to be cost-effective and flexible. Based on dispersed and autonomous system control logic, the AC module offers advantages over conventional central-inverter based systems: increased modularity, ease of installation, freedom of system design, and easy system expansion. The system described has frequency tracking capability, enabling two modules at different base frequencies to interoperate stably at a common frequency. Simulation results for various conditions are included, and its operation as an active power filter considered