Refined Modeling Method for Real-time Simulation of Large-scale Offshore Wind Farm Stations

With the rapid growth of the proportion of wind power, photovoltaic and other new energy, the development of the power system presents a high proportion of renewable energy and high proportion of power electronic equipment situation. Electromagnetic transient simulation is the key technology to analyze new power system. The modeling of new energy station needs to consider both precision and efficiency. The complex mechanism of core equipment and the large number of unit topology nodes make it difficult to model wind turbines. The existing unit models have high computational complexity and occupy a large amount of real-time simulation hardware resource. The commonly used aggregation methods can expand the simulation scale of wind farm stations, but they lose a large amount of internal information of the station and lack precision. In this paper, the core equipment models of direct driven wind turbines are established with the discretization method, and then the wind turbine model is set up based on the network division method. Finally, a test model of an offshore wind farm station is built on the RTDS platform to verify various aspects. The results show that the proposed model has high accuracy of impedance characteristics and time-domain waveform, with an average relative error of waveform not exceeding 3%, and simulation resources occupying 27.3% of the detailed model. ©2024 Chin.Soc.for Elec.Eng.