Technical requirements and schemes for analysis and control of transient response characteristics of active power restoration of wind power

Abstract

China’s relevant standards for wind power access to the power grid stipulate that the wind farm should have low-voltage ride through capability, dynamic reactive power support capability from the wind farm access point and other basic technical requirements. On the one hand, the transient response characteristics of wind turbines are the main determinant of the transient response characteristics of wind farms, while the transient response characteristics of wind turbines connected to the grid are not consistent in the current market. On the other hand, the transient response characteristics of wind farms cannot be simply understood as simple amplification or superposition of the transient response characteristics of wind turbines. Because the electrical distribution of wind turbines in a wind farm has the characteristics of dispersion and correlation, the mutual interaction between wind turbines will also have a significant impact on the transient response characteristics of the wind farm. For the future research trend of wind power grid connection stability, the main work of this paper is as follows. First, based on the published domestic wind turbine model verification standards, an electromechanical transient simulation model is established to more accurately simulate the transient response characteristics of wind turbine active power recovery. With that, the transient response characteristics of wind turbines, the interaction between wind turbines and the influence of wind farm collection system on the transient response characteristics of wind farm active power recovery are studied, and the transient simulation model of wind farm is established. Finally, the influence of grid-connected wind farm active power recovery characteristics on the system is analyzed. And corresponding active power recovery and reactive power output control strategies to improve the stability of wind power grid-connected are proposed. This paper focuses on the research on technical requirements and schemes for analysis and control of the transient response characteristics of wind power active power.