A Wind Farm Active Power Control Method Based on Model Predictive Control

Abstract

The invention discloses a method for controlling the active power of a wind farm based on model predictive control. The wind turbines are classified according to the wind speed of the wind turbines, and the local linearized state space model of each type of generators is established by using an equivalent modeling method and based on This design model predictive controller considers the dynamic response characteristics of different types of units, and distributes the grid dispatching value to each type of unit according to a certain priority, and the active power reference value obtained by each type of unit is then revised by the model predictive controller. The modified value is distributed proportionally to all units in the class. The invention aims at controlling the active power of the wind farm, considers the operation difference among the units, and predicts and controls based on the model, so that it can quickly track the dispatching value of the power grid.

Description

technical field [0001] The invention belongs to the technical field of wind farm active power control, and more specifically relates to a wind farm active power control method based on model predictive control. Background technique [0002] As the most important form of renewable energy utilization, wind power has developed rapidly. The traditional wind farm control method is an autonomous active power control method, which allows each fan in the wind farm to generate electricity as much as possible according to the change of wind energy. With the gradual increase of wind power penetration, the fluctuation of active power of wind farms caused by the uncertainty of wind energy has brought great challenges to the safe operation of power grids. The controllable operation of wind farms will gradually become the development trend of grid-connected operation of large wind farms. The key technology for the controllable operation of wind farms is the active power control of wind fa...

AI Technical Summary

Problems solved by technology

However, if the differences between units are not considered, resulting in improper power distribution, it will inevitably lead to poor tracking effect of total active power

And the current research ignores the response time of the unit, thinking that the active power output of the unit can reach the reference value in an instant, and instead focuses on the load control of the fan under power traceability

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