Mechanism of 2nd鄄generation Wind Turbine Model and Functional Optimization of Low Voltage Ride鄄through Based on PSS/E

As a powerful power system simulation software with wide applications, PSS/E has considerable advan鄄 tage in the study of model simulations. However, there exits some shortcomings in the description of low voltage ride鄄 through ( LVRT ) of wind turbine unit by the PSS/E transient model, which makes the wind power modelling and simula鄄 tion based on PSS/E cannot be applied to the study of grid integration. As a result, the reference values to engineering practice will decrease in different links, such as the planning and construction of power grid, as well as its operation and control. In this paper, according to the analysis of the principle for the PSS/E 2nd鄄generation wind turbine model, the advantage and disadvantage in describing the low鄄voltage operation conditions of wind turbine are elaborated. In addi鄄 tion, the user鄄defined functions of the transient model in PSS/E are applied to perform functional optimization for the LVRT characteristics. The research in this paper extends the functions of the 2nd鄄generation wind turbine model based on PSS/E and enriches the transient model library in PSS/E, which empowers this software platform with core functions to perform transient analysis for the grid integration of large鄄scale renewable energy power generation. Finally, combined with the output characteristics of wind turbine under the actual voltage drop fault, the correctness and practicability of the user鄄defined module are compared and verified through simulations.