Study on novel power controllable distributed connected-grid inverter

Distributed connected-grid generator becomes an important approach to utilize renewable energy. However, traditional distributed connected-grid inverter can´t be controlled and still can not be accepted by Power Grid Company. On the basis of conventional connected-grid inverter, a novel connected-grid inverter controlled by center controller was designed, which gets separate dq current component by processing voltage of grid and given output power value from center controller, then couples dq current component and obtains inverter output reference current, finally injects current to load with close-loop current control system. Simulation results verify the validity and the feasibility of controlled inverter.