Electric power system dispatching method based on wind electricity output uncertainty aggregation

Abstract

The invention discloses an electric power system dispatching method based on wind electricity output uncertainty aggregation, which comprises the following steps of: acquiring wind electricity output data of each wind electricity plant of an electric system, and determining a confidence interval of the wind electricity output; calculating the time predicated value of the wind electricity output uncertainty, and determining the time constraint set of wind electricity output according to the time predicated value; calculating the space predicated value of the wind electricity output uncertainty, and determining the space constraint set of the wind electric output according to the space predicated value; calculating the intersection of the confidence interval, the time constraint set and the space constraint set, thereby obtaining the uncertainty set of the wind electricity output; and acquiring the output power and the starting and stopping time of each machine set in the electric system according to an electric system robust dispatching method and the uncertainty set of the wind electric output. According to the invention, the difficulty of wind electricity output uncertainty modeling in the electric system robust dispatching problem containing large-scale wind electricity is solved, the safety and reliability of the power grid starting and stopping as well as dispatching plan are ensured, and the utilization ratio of wind electricity output of an electricity plant is improved effectively.

Description

technical field [0001] The invention relates to the problem of robust scheduling of power systems containing large-scale wind power, in particular to the technical field of power system scheduling based on wind power output uncertainty sets. Background technique [0002] The power system scheduling problem is one of the most important decision-making processes in the power system operation. Its goal is to find a scheduling strategy to minimize unit operation and scheduling costs, and at the same time take into account a variety of actual, different periods of power generation, transmission and system stability constraints. In recent years, the proportion of new energy power generation, especially wind power generation, has increased significantly. Because wind power output is difficult to accurately predict with existing technologies, the random and intermittent changes caused by its large-scale connection have brought major challenges to the optimal dispatching decision of ...

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Problems solved by technology

[0007] Based on this, the present invention provides a power system scheduling method based on wind power output uncertainty sets, which solves the problem of determining the construction of wind power output uncertainty sets in the power system robust scheduling problem, and the constructed wind power output uncertainty sets High reliability and easy construction; the model takes into account the smoothness of wind power output in time and the average of space, which can effectively reduce conservatism and improve the utilization rate of wind power output in wind farms

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