A General Fault Ride Through Control Model for Typical Renewable Energy Generators

Due to environmental and energy shortage issues, inverter-interface renewable energy sources, such as photovoltaic and wind generations, has been becoming main power suppliers in modern power system, which compliments with challenges of dynamic stability of power system. Different fault ride through (FRT) control strategies have been presented in literatures for different typical renewable generators to enhance the dynamics of power system. However, there lacks of a general FRT control model to facilitate the characteristics analysis of different renewable generators. By investigating control models of typical renewable generators, this paper proposes a general FRT control mode considering low voltage ride through (LVRT) and high voltage ride through (HVRT) simultaneously for typical inverter interfaced renewable generators. Detailed control diagram and logics of the general control mode based on the FRT standard of inverter interface renewable generators in China has been presented and discussed. Finally, case study based on MATLAB/Simulink has been performed, and the preliminary simulation results verify that the proposed general FRT control mode can adapt to analysis of typical renewable generators during faults successfully.