Optimal evaluation method of wind power capacity based on sced

Abstract

The invention discloses a wind power penetration optimization evaluation method based on SCED. The method comprises the following steps: based on a physical model and an economic model of an evaluation power grid and under a condition of knowing a turn on / turn off scheme of a routine unit, establishing a safety constraint economy scheduling model; taking a wind power station in an area as a concrete evaluation target, setting an optimization object of the safety constraint economy scheduling model to be a maximized total wind power output and acquiring an optimization model of wind power penetration evaluation; linearizing non-linear factors in the evaluation model; solving the evaluation model by adopting a linear programming method, calculating an active curve of the accepted wind powerin the research area, acquiring a wind power penetration ability of the power grid and acquiring a maximized grid-connected generation capacity of the each wind power station in an evaluation period.By using the method of the invention, carrying out precontrol to a risk of accessing large scale wind power into the power grid can be easily achieved, and security of power grid operation can be raised.

Description

technical field [0001] The invention belongs to the technical field of electric power system dispatching automation, and relates to a method for optimizing and evaluating wind power receiving capacity based on SCED. Background technique [0002] With the increasingly severe energy and environmental issues, the issue of energy conservation and emission reduction has received widespread attention worldwide. As a renewable and pollution-free green energy, wind power has been vigorously developed in recent years. Wind power generation depends on changing weather conditions. The integration of wind power in the power system will bring the following challenges: (1) randomness: it is difficult to accurately predict the output of wind turbines affected by wind speed, and the prediction accuracy is low; (2) intermittent: wind turbines The output will fluctuate violently between different periods. For example, the output power in the previous period was high, and then fell to a lower...

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Problems solved by technology

In the evaluation of the wind power capacity of the grid, the usual treatment is to consider factors such as the operation mode, disturbance mode, and stability criteria from the perspective of wind power planning, and use it to determine the maximum installed wind power capacity, that is, the wind power penetration power limit. This type of evaluation method does not Applicable to the field of short-term dispatching operation; there are also some evaluation methods to evaluate the wind power acceptance capacity from a single perspective, such as peak shaving, etc., and analyze the wind power acceptance capacity of the power grid by establishing an algebraic model, but it is difficult to guarantee the validity and practicability of the evaluation results

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