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

Abstract

A wind farm active power controlling method for improving the generating efficiency of the wind farm includes first calculating the maximum theoretical generating power of each wind turbine at next time in the wind farm, performing coordination control with a long and a short control duties, arranging the start-stop of each wind turbine and a control target value, so as to achieve the optimum control of the wind farm active power output. It is reasonable to the control target value arranged to the wind turbines in the control duty controlling and the control precise can be ensured. In the short control duty controlling, fast active power adjusting is achieved to some of the wind turbines, so as to eliminate the forecasting error of the maximum wind turbine theoretical generating capacity and the wind-power fluctuation, such that the active power output of the whole wind farm follows the control target value and the generating efficiency of the wind farm is improved as maximum limitation as possible. The solution is adapted for the wind farm, which includes stall-regulated wind turbines or some wind turbines not participating in the active power control in some case, to achieve active power controlling.

Description

technical field [0001] The invention belongs to the technical field of new energy power generation and access, and in particular relates to a wind farm active power control method for improving wind farm power generation efficiency. Background technique [0002] Since the promulgation of the "Renewable Energy Law" in 2005, my country's wind power has developed rapidly. At present, my country's wind power grid-connected capacity 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 more than 10GW per year. However, since most of my country's wind resource-rich regions are located in the "Three Norths" region, more than 90% of wind power is concentrated in the "Three Norths" region through 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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