The research of PET based on the improved virtual inertia control strategy

In view of the problem of power grid frequency fluctuation when load switching and renewable output power changed based on the Power electronic interface high respond speed character, a modified virtual inertia control control strategy has been applied to the output stage at Power Electronic Transformer(PET). The power support based on the virtual inertia is achieved and makes the energy internet flexible based on the construction of energy router. The control of MMC circuit at the input level in PET adopted virtual synchronous generator control strategy and the isolation level adopts traditional phase shift control. The advantage of proposed strategy is verified by the MATLAB/SIMULINK simulation.