Oscillation Energy Transfer and Power Support Technology for Grid-forming Wind Power Grid-connected System
Improving the oscillation energy transfer efficiency of grid-forming wind turbines is the key to solving the parameter design contradiction between oscillation suppression and frequency support,which plays an important role in the engineering application of grid-forming control technology.First,this paper analyzes the rotor angle elastic coupling relationship between a synchronous generator and a grid-forming doubly-fed wind turbine,and constructs a two-degree-of-freedom system elastic motion model with grid-forming wind power.Then,based on the Hamiltonian energy function method,the transfer mechanism of oscillation energy between the grid-forming wind turbine and the synchronous generator is analyzed,and the necessary condition for improving the oscillation energy transfer efficiency of the grid-forming wind turbine is analyzed.The active support control strategy of the grid-forming wind turbine power based on the efficient transfer of oscillation energy is proposed.Finally,a simulation system with high proportion of wind power is constructed,indicating that the proposed control method can significantly improve the suppression effect of doubly-fed wind turbines on system power oscillation and frequency fluctuation.
万方数据
维普
