Modeling of Large-scale Offshore Wind Farm Based on Vector Modeling Technique

As the scale of wind farm continues to increase, the internal stability of wind farms and the distribution control strategy of wind turbines need to be further studied. Modeling is the basis of stability analysis. In order to solve the modeling problem, this paper proposes a wind farm modeling method based on vector variables. The core idea is to convert the complex model that contains plenty of wind generation units to a model consisting of one typical submodule, by constructing the block vector formed variables. In this way, the model has good scalability and high simulation efficiency, and can be realized by the vector simulation function of MATLAB/Simulink. In addition, linearization results can be easily and directly obtained by using Linearization Toolbox in Simulink, thus avoiding the complexity of writing programs for linearization calculations when studying the stability of large systems. Then, the simulation results are compared with the electromagnetic transient model to verify the correctness of the model. Time-domain simulation and linearization results verify the effectiveness of the method.