Modeling and Simulation Verification of Broadband Oscillation in Actual Grid of Doubly-Fed Generator Based on PSCAD

With the increasing proportion of doubly-fed units in wind power generation, domestic and foreign research institutions have conducted extensive research on them and built system models under the ideal grid. Firstly, This paper briefly introduces the control strategy of doubly-fed unit. Based on the analysis of the simulation software PSCAD/EMTDC, and based on File Reader, Current Source and circuit theory in the component library, a method of simulating the actual power grid with broadband oscillation is proposed. Seconly, A controlled voltage source model is built to simulate the actual power grid, and the control effect of doubly fed wind power generation system under broadband oscillation is studied. Finally, by comparing and analyzing the simulation and measured results, it is verified that the above model can simulate the actual power grid well, which lays a foundation for the study of the control strategy and adaptability of the doubly-fed unit under the condition of broadband oscillation.