CROSS-REFERENCE TO RELATED APPLICATION

This application is a 35 U.S.C. 371 national stage filing of PCT Application No. PCT/CN2018/077864 filed on Mar. 2, 2018 which is incorporated herein in its entirety by reference.

TECHNICAL FIELD

Embodiments of the present application relate to a control technique for active power of a wind power plant cluster, and for example, relate to a control method and a device for active power of a wind power plant cluster.

BACKGROUND

Most of wind power plants are away from a load center, and thus need large-scale long-distance conveyance. Difficulty of peak regulation of a power grid is increased due to fluctuation and reverse peak regulation characteristics of the wind power plants, and a problem of wind power curtailment caused by the difficulty of peak regulation is increasingly obvious.

With respect to the control over the active power of the wind power plant cluster when peak regulation is difficult, a related control method is to limit wind power for each wind power plant at different periods of time after a certain safety margin is reserved according to consumption capability of the power grid, so that the active power of each wind power plant within one period of time is kept constant.

However, the active power of each wind power plant is constant within one period of time and thus cannot be rapidly regulated according to the consumption capability of the power grid. A power generation sequence of the wind power plants is not considered, causing that power generation capability of the wind power plants cannot be fully utilized.

SUMMARY

The present application provides a control method and a device for active power of a wind power plant cluster, so as to rapidly regulate the active power of wind power plants according to consumption capability of a power grid to fully utilize power generation capability of the wind power plants.

In a first aspect, embodiments of the present application provide a control method for active power of a wind power plant cluster. The wind power plant cluster includes wind power plants of m priorities, where m is a positive integer, and the control method includes:

monitoring the consumption capability of the power grid in real time, and determining object active power of the wind power plant cluster according to the consumption capability of the power grid;

determining a command active power of the wind power plant within each of the priorities according to the object active power of the wind power plant cluster in a descending order of the priorities; and

controlling a real active power of the wind power plant within each of the priorities according to the command active power.

In a second aspect, embodiments of the present application provide a control device for active power of a wind power plant cluster. The wind power plant cluster includes wind power plants of m priorities, where m is a positive integer and the control device includes:

a determining module for object active power of a wind power plant cluster, which is configured to monitor the consumption capability of the power grid in real time, and determine the object active power of the wind power plant cluster according to the consumption capability of the power grid;

a command active power computing module, which is configured to determine command active power of the wind power plant within each of the priorities according to the object active power of the wind power plant cluster in a descending order of the priorities; and

a control module, which is configured to a control real active power of the wind power plant within each of the priorities according to the command active power.

In the control method and device for the active power of the wind power plant cluster provided in embodiments of the present application, the wind power plants are classified into different priorities, so as to determine the object active power of the wind power plant cluster according to the consumption capability of the power grid detected in real time; then the command active power of the wind power plant within each priority is determined according to the object active power of the wind power plant cluster in the descending order of the priorities; and finally the real active power of the wind power plant within each priority is controlled according to the command active power. In a technical solution provided by embodiments of the present application, the active power of each wind power plant is rapidly controlled and regulated according to the consumption capability of the power grid detected in real time; and when the active power of each wind power plant is controlled and regulated, the priority of each wind power plant is considered and the power generation capability of each wind power plant is fully used, thereby solving a problem that the power generation capability of each wind power plant cannot be fully utilized.

