Analysis of Wide frequency oscillations of double fed induction generator connected to the grid via VSC-HVDC

In this paper, a small-signal linearisation model is developed based on the dynamic model of a double fed induction generator connected to the grid via VSC-HVDC. The influence of the system parameters on the wide frequency oscillation characteristics is analysed using the eigenvalue method and the parameters that enable the system to operate stably are designed with reference to the conclusions obtained. Finally, a time-domain simulation model is built using PSCAD to verify the correctness of the analysis of the wide-band oscillation characteristics.