Modeling and Simulation Method Combining Model Reference Adaptive Control and Reduced-Order Model of DFIG

Abstract

The invention discloses a modeling simulation method combining adaptive model reference control and a double-fed fan order reduction model. The modeling simulation method includes the steps: building a fan transmission shafting model, performing modeling for a transmission shafting of a double-fed fan by the aid of an elemental block model, converting wind power absorbed by the fan into mechanical torque, and inputting the mechanical torque onto a rotating shaft of a double-fed generator rotor; building a first-order double-fed generator model by ignoring change of a stator flux linkage and a rotor flux linkage, converting the mechanical torque on the rotating shaft of the double-fed generator rotor into active power, and outputting the active power to a power grid; building a converter control module of a rotor side, adding adaptive model reference control according to electrical parameter perturbation, and controlling the active power of a double-fed generator to stably output; performing grid connection for a plurality of wind-turbine generator sets, giving change of wind speed to obtain grid-connected characteristics of large-scale wind power plants and influence relations between the wind-turbine generator sets.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a modeling and simulation method combining model reference adaptive control with a double-fed fan reduced-order model. Background technique [0002] With the accelerated pace of economic development, human beings' desire for material requirements has gradually increased, the level of modernization and the development of science and technology have increased, and more and more resources and energy have been consumed. People have begun to turn to the exploration of clean energy. As a renewable green wind energy with huge content, more and more attention has been paid to it, and more and more funds are invested in wind power projects every year. Among them, the doubly-fed induction fan has better wind energy utilization rate and better power quality, which is favored by scholars and investors at home and abroad. [0003] The grid-connected capacity of wind turbines is...

AI Technical Summary

Problems solved by technology

Due to the heat generated in the operation condition of the fan will cause the change of the resistance parameter, which will affect the performance of the fan control system, and eventually lead to the problems of large vibration noise and unstable output of the fan, and the adaptive control for parameter perturbation has become the problem. an efficient solution

For large-scale grid-connected wind farms, if all DFIGs are equivalent to one unit using the single-machine equivalent method, it is impossible to study the influence characteristics between different wind turbines. If a detailed model is used for each wind turbine, adding Adaptive control modules for changes in electrical parameters and other modules that control power output will greatly increase the complexity of the system, and may cause the problem of dimensionality disaster in simulation, making it difficult to obtain simulation results or simulation time-consuming long

Images