In view of the series resonance problem apt to be neglected when the remote wind farm is connected to the grid

a method by referring to modal analysis and dummy branch is used for analysis. Because of the long sending line of the remote wind farm

the grid structure is relatively weak and the influence of the distribution parameter of the transmission line cannot be ignored. A distributed parameter model of transmission line is built and the impedance characteristics are analyzed. Based on the grid-connected wind farm model developed

the method by combining modal analysis with dummy branch is used to analyze the system series resonance phenomenon. Series resonance frequency is accurately judged. Meanwhile

the modal sensitivity values of the electrical elements of the system are given. Finally

a simulation model is set up by taking a wind farm as an example. The feasibility of the method used is verified by simulation results. The influence of the change in line length on the series resonance of the wind farm grid-connected system is expounded by the calculation of the element sensitivity

providing a theoretical basis for the actual construction of the wind farm.