Wind farm active power output smooth control method and device

Abstract

The embodiment of the invention provides a wind farm active power output smoothing control method and a device. The method comprises the following steps: predicting the output fluctuation trend of thewind farm by using a wind farm control model based on a Smith prediction algorithm; and determining and executing a wind power smoothing strategy of the energy storage system according to the outputfluctuation trend of the wind farm. The embodiment of the present invention applies Smith prediction to wind farm control according to the characteristic that the whole wind farm control system exhibits large time delay, which can ensure the stability of the wind farm wind turbine output as a whole, at the same time, according to the historical control results of the wind farm, statistical analysis is performed, the energy storage system can optimize the regulation compensation in advance according to the analysis results, which can improve the regulation speed and accuracy, reduce the regulation frequency and regulation amount of the energy storage device, and realize the win-win between the grid and wind farm.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of wind power generation, and more specifically, to a method and device for smoothing active power output of a wind farm. Background technique [0002] Wind energy has become one of the main clean energy sources in the world. However, wind power generation has the characteristics of intermittent, fluctuating, and seasonal changes. Large-scale centralized grid connection will cause problems such as grid power generation and load deviation, and frequency instability. It is of great significance to smooth the output power of wind farms to reduce the problems caused by large-scale wind power grid integration. [0003] The energy storage system can make up for the natural instability of new energy sources, and provides development space for energy storage that can smooth power and improve power quality. The necessity of energy storage technology is reflected in ensuring the security of ...

AI Technical Summary

Problems solved by technology

However, the current energy storage system can only passively compensate for the disturbance in the overall output power of the wind farm, and cannot achieve high synchronization with the output of the wind farm, so the ability of the energy storage system to suppress disturbances has not been fully reflected

At the same time, from the perspective of control theory, since the inertia link in the wind farm control process is inevitable, there are certain defects in the conventional PID control method for the large time-delay system, and some electric fields with abnormal adjustment parameters will cause the overall output of the electric field Oscillations pose a potential threat to the safety of the power grid and the electric field itself

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