Standby demand dynamic evaluation method for multi-scheduling scene of wind power system

Abstract

The invention provides a standby demand dynamic evaluation method for a multi-scheduling scene of a wind power system. According to the method, the uncertainty of the source-load side of a power system containing wind power is comprehensively considered, and wind power, load predicted values and measured values in the same historical time period form a data set; uniform binning is performed on thedata set according to the predicted value, and fitting of the system error distribution rule in the box is performed by adopting a universal distribution model to obtain a system error probability distribution curve; expectations of failure upward / downward spare capacity, load shedding capacity and wind curtailment capacity are obtained according to the distribution curve; and numerical integration and piecewise linearization processing are carried out on the four expected expressions which cannot be analyzed so that the expected expression can be analyzed and easy to popularize. The method has the advantages that the standby requirements influenced by the system uncertainty in different scheduling periods can be dynamically evaluated, and the method not only can be used as an evaluationindex of a known power system unit combination / economic scheduling result, but also can be directly applied to the power system optimization scheduling problem to help scheduling personnel to obtain areasonable standby 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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