Uncertain wind power output-based coordinated optimization method for wind power grid connection

Abstract

The invention discloses an uncertain wind power output-based coordinated optimization method for wind power grid connection. The method comprises the following steps: collecting related parameters of a system; establishing a wind power prediction error calculation model and a wind power prediction error growth model, and obtaining uncertain wind power output according to the wind power prediction error growth model; on the basis of establishing a weight interval model that load can participate into scheduling and introducing a schedulable load and energy storage system, establishing a wind power cost model and establishing a coordinated optimization scheduling model for wind power grid connection of considering the schedulable load and energy storage system, and obtaining power output of various units within the scheduling period according to the optimization model; and calculating the wind curtailment rate of the system according to the power output of various units, and analyzing various costs and the standby condition of the system. According to the internet coordinated optimization model for wind power grid connection based on the uncertain wind power output and the schedulable load weight interval established by the method, the optimization scheduling scheme with obvious social and economic benefits is provided for scheduling personnel when solving the wind power integration problem.

Description

technical field [0001] The invention relates to the field of power system operation and scheduling, in particular to a wind power grid-connected coordination and optimization method based on wind power uncertain output. Background technique [0002] At present, research on the economic dispatch of large-scale wind power grid-connected operation at home and abroad has made some progress. Due to the large randomness and strong volatility of wind power output, it will inevitably bring great difficulties to large-scale wind power grid-connected economic dispatch. Therefore, many scholars have done a lot of research on wind power output prediction, but it is still difficult to obtain accurate prediction results. Forecast errors will continue to exist for a long time. The energy storage system can effectively solve the above problems. However, it needs to be considered that the cost of energy storage is too high, and the efficiency is relatively low. Blindly increasing the energy...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a wind power grid-connected coordination optimization method based on wind power uncertain output. On the basis of establishing a wind power uncertain output model based on error growth, and aiming at the problems caused by wind power uncertain output, a wind power Cost model; due to the different roles of various loads in system scheduling, the present invention proposes the concept of schedulable load weight interval according to the degree of whether various loads can participate in scheduling, and integrates the indicators of various loads, and establishes a model ;Combined with the energy storage system to establish a wind power grid-connected coordination and optimal dispatch model, to provide an optimal dispatch plan with obvious social and economic benefits for grid dispatchers when solving the problem of wind power access

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