Wind turbine generator active power control optimization method and system based on internal model control

Abstract

The invention discloses a wind turbine generator active power control optimization method and system based on internal model control. The method comprises the steps: collecting the real-time mechanical power PM of a fan, and taking the mechanical power PM as the input of a preset nonlinear built-in model GIMC (s) to form a feedback compensation signal delta PE; adding the feedback compensation signal delta PE and the fan active power demand Pord to serve as a feedback signal, and inputting the difference between the feedback signal and a preset active power set value Ptate into a pitch compensation control PID (Proportion Integration Differentiation) controller to calculate to obtain a pitch angle control compensation amount; and superposing the pitch angle control compensation amount to the pitch control amount to obtain a pitch angle control instruction of the next period. According to the method, the primary frequency modulation control performance of a wind turbine generator can be improved, the fluctuation amplitude of power along with wind speed disturbance is reduced, and the robustness and the anti-interference capability of fan power control are improved.

Description

technical field [0001] The invention relates to the technical field of wind turbine control technology, in particular to an internal model control-based active power control optimization method and system for wind turbines. Background technique [0002] Due to the randomness and volatility of wind, the output power of wind turbines is also in a state of constant change. After the wind turbine is connected to the grid, the continuous change of the output power of the wind turbine poses a major challenge to the integration, operation and control of the power system. Generally speaking, for variable-speed wind turbines with variable pitch, pitch compensation control is an important means of active power control. Conventional pitch compensation control adopts PID control, and the deviation between power setting value and actual power is calculated by PID Then generate the pitch angle control command. Because the active power response of wind turbines is strongly nonlinear and ...

AI Technical Summary

Problems solved by technology

Because the active power response of wind turbines is strongly nonlinear and affected by wind speed, the effect of conventional PID control is not ideal

And under the background that the current wind turbines require a frequency modulation function and better suppression of power fluctuations, conventional PID control is becoming more and more difficult to meet the needs of wind turbine power control

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