A method for dynamic evaluation of spare demand in multiple dispatching scenarios of wind power system

Abstract

The invention proposes a method for dynamically evaluating backup demand in multiple dispatching scenarios of a wind power system. The present invention comprehensively considers the uncertainty of the source and load side of the power system including wind power, and forms a data group of wind power, load prediction values ​​and actual measurement values ​​in the same historical period; the data group is evenly binned according to the prediction value, and the general distribution model is used to bin the data group. The system error distribution law is fitted to obtain the system error probability distribution curve; according to the distribution curve, the failure up / down reserve capacity, load shedding volume and abandoned air volume expectation are obtained; the four unanalyzable expectation expressions are numerically integrated and analyzed. Segment linearization makes it analytic and easy to generalize. The advantage of the present invention is that it can realize the dynamic evaluation of the backup demand affected by the system uncertainty under different scheduling periods, and it can not only be used as an evaluation index of the known power system unit combination / economic scheduling results, but also can be directly applied to the optimal scheduling problem of the power system , to help dispatchers get a reasonable backup plan.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a method for dynamically evaluating backup demand in multiple dispatching scenarios of a wind power system. Background technique [0002] With the rapid development of renewable energy and a large number of grid connections, the optimal dispatch of power systems with a high proportion of renewable energy has become a research topic that has attracted much attention under the current energy situation. The backup resource is an important guarantee for the safe and stable operation of the power system, and its optimization problem is also facing new challenges in the context of large-scale wind power grid integration. [0003] The purpose of power system reserves is to stabilize the unbalanced power caused by the uncertainty of the source and load side of the system. Too much reserve will cause waste and reduce the economy, and too little will not be enoug...

AI Technical Summary

Problems solved by technology

However, after a high proportion of wind power is connected to the grid, the relationship between system uncertainty and backup demand becomes complicated, and deterministic methods are no longer applicable

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