Wind farm output optimization method during system recovery process based on wind farm power limit control capability

Abstract

The invention discloses a wind farm output optimization method during a system recovery process based on a wind farm limited power control capability. An active power output robust optimization model based on an information gap decision theory is built, an artificial bee colony algorithm is adopted to solve the model, and a wind power active power input scheme considering wind power output uncertainty is acquired. The method comprises steps: 1, a wind farm output feature model based on a limited power function is built; 2, influences on an already-recovered system by the wind power output are analyzed; 3, a certainty optimization model not considering wind power output fall is built; 4, a wind power output robust optimization model based on the information gap decision theory is built; and 5, the artificial bee colony algorithm is adopted to solve the robust model to obtain the wind power active power input scheme reaching an expected output target. The wind power active power input scheme obtained in the method can bear active power output impact and output fall existing in the wind power during the system recovery process, and the system safety in the case of wind power output adjustment and output temporary fall can be ensured.

Description

technical field [0001] The invention belongs to the technical field of power grids, in particular to a wind farm output optimization method in the system recovery process based on the wind farm power limit control capability. Background technique [0002] During the recovery process of the blackout system, especially in the early stage of recovery, restoring more power as soon as possible is the key to improving the recovery efficiency of the power grid. Compared with conventional thermal power units, the wind power can be connected to the power grid after the power supply of the wind farm is restored, quickly providing power support for the power outage power grid. For a power outage grid with a large amount of wind power, the participation of wind power in the recovery of the grid will speed up the recovery of the system. The assessment of wind power output is a key and challenging issue for wind power participating in system restoration. Wind power will have an impact o...

AI Technical Summary

Problems solved by technology

Among them, the active output of wind power will have a frequency impact on the restored system. Second, although the power-limiting control technology can make the wind power output meet the dispatching requirements, due to the uncertainty of wind energy, the active output of the wind farm will fail to meet the dispatching requirements in a short period of time. Conditions required, frequency shocks to the restored system

Moreover, there are uncertainties in the time and drop value of the output of the fan, which increases the difficulty of evaluating the output of the fan.

[0003] At present, there is no research on the optimization of wind power output in the process of system recovery based on the power limit control capability of wind farms

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