With the increasing of PV power plants and capacity combined to the grid, the difficulties and complexities arise in grid dispatching operation due to the randomness and intermittency of photovoltaic power generation. INT-PVCS power control system can manage and gather all real-time operation information of PV power plants and transmit them according to dispatching requirements or higher intelligent devices via communication with CSU200 AGC/AVC devices, SVG, and step-up monitoring system. The system supports all major domestic communication protocols.