Active power control method of wind power station for improving power generation efficiency of wind power station

Abstract

The invention provides an active power control method of a wind power station for improving the power generation efficiency of the wind power station. The active power control method comprises the following steps: firstly, calculating the maximum theoretical generating power at the next moment of every wind power unit in the wind power station; coordinating and controlling by using long and short control periods, reasonably arranging the on-off of every wind power unit and controlling a target value to realize the optimized control of the reactive power output of the wind power field. According to the active power control method, in the long control period, the control target value distributed to the a blower is reasonable, and the control precision can be guaranteed; in the short control period, the active power of a part of wind power units can be quickly adjusted to eliminate the predict bias of the maximum theoretical generating power of the wind power unit and the fluctuation of the wind power, so that the active power output of the entire wind power station tightly follows the control target value, the power generating efficiency of the wind power station is improved greatly, and the running economy of the wind power unit is improved; the active power control method is applicable to perform the active power control on the wind power station including a stall type blower or a part of wind power units which can not participate in the active control under certain condition.

Description

Technical field [0001] The invention belongs to the technical field of new energy power generation and access, and specifically relates to a wind farm active power control method for improving the power generation efficiency of the wind farm. Background technique [0002] Since the promulgation of the "Renewable Energy Law" in 2005, my country's wind power has developed rapidly. At present, the grid-connected capacity of wind power in my country has exceeded 43GW, and there are more than 600 grid-connected wind farms. According to the National Medium and Long-term Development Plan for Renewable Energy, my country’s installed wind power capacity will reach 150GW in 2020, that is, wind power will continue to grow at a rate of over 10GW per year. However, since most of the regions with rich wind resources in my country are in the "Three Norths" area, more than 90% of wind power is concentrated in the "Three Norths" area by centralized development, and most wind farms are integrated...

AI Technical Summary

Problems solved by technology

Therefore, it is bound to cause a waste of power generation space and affect the power generation efficiency of the wind farm

At the same time, the existing control strategies are only applied to wind farms where all wind turbines have the ability to continuously adjust power, without considering that large wind farms contain multiple types of wind turbines, including stall-type wind turbines, or cannot participate in the wind farm for some reason. Wind turbines with active power control, etc., so it is not conducive to practical application

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