Attach angle weight coefficient based independent variable pitch control system controlled by fuzzy PID (proportional integral derivative)

Abstract

The invention discloses an attack angle weight coefficient based independent variable pitch control system controlled by fuzzy PID (proportional integral derivative). The attack angle weight coefficient based independent variable pitch control system controlled by fuzzy PID comprises a summator, a fuzzy control module, an attack angle weight coefficient compositing module, a PID control module and an independent variable pitch module, wherein the summator is used for generating a deviation signal; the fuzzy control module is used for acquiring three original parameters of PID controllers by utilizing the deviation signal and a deviation variation rate; the attack angle weight coefficient compositing module is used for compositing an attack angle weight coefficient with the original parameters and outputting control parameters of the PID controllers; the PID control module comprises three independent PID controllers, and each PID controller generates a control signal according to the deviation signal, the control parameters and feedback of an encoder; the independent variable pitch module is used for receiving the control signals of the PID controllers, analyzing and computing the control signals, outputting an instruction signal to a driver and regulating a motor by the encoder, and a controlled article is independently connected with the independent variable pitch module. The attack angle weight coefficient based independent variable pitch control system controlled by fuzzy PID has the advantages that controlling precision and responding time of the variable pitch control system on a rated wind speed can be improved, conditions of blades which are stressed to flap and vibrate are improved, and output power is more stable.

Description

technical field [0001] The invention relates to the field of wind turbine control systems, in particular to a wind power independent pitch control system based on fuzzy PID (Proportional Integral Derivative, proportional-integral-derivative) control of the angle-of-attack weight coefficient. Background technique [0002] In order to reduce the load on the wind turbine to prolong the service life of the fan, suppress the fluctuation of the output power of the wind turbine and reduce the adverse impact on the grid, large and medium-sized wind turbines usually adopt variable pitch control above the rated wind speed, that is, by changing the pitch angle of the fan blade , to change the wind energy utilization coefficient to keep the unit output power stable. At present, most wind turbines use PID controllers to control the pitch system, but in order to make the overshoot of the controller smaller, the response speed is faster, the sensitivity is higher, the system is more stable...

AI Technical Summary

Problems solved by technology

At present, most wind turbines use PID controllers to control the pitch system, but in order to make the overshoot of the controller smaller, the response speed is faster, the sensitivity is higher, the system is more stable, and the electric energy output by the wind turbines is more stable. , pure PID control cannot meet the requirements of wind power, which requires a more reasonable optimization of the pitch control system

Images