Energy storage-containing power grid interval power supply reliability evaluation method considering supply and demand uncertainty

Abstract

The invention provides an energy storage-containing power grid interval power supply reliability evaluation method considering supply and demand uncertainty, and the method comprises the steps: determining a reliability model of a generator set and an output model of a wind turbine generator set, and building a reliability interval optimization model with the optimal load shedding amount interval as a target function, the reliability model of the generator set and the output model of the wind turbine generator set are determined based on a sequential Monte Carlo simulation method; converting the reliability interval optimization model into a deterministic probability model by adopting an interval possibility degree method in consideration of an operation strategy that an energy storage system participates in dispatching optimization of the power system, so as to seek a maximum non-shedding load probability; and calculating an interval power supply reliability evaluation index through the deterministic probability model. According to the method, the interval reliability optimization model of the system is established based on the sequential Monte Carlo simulation method, so that the uncertainty of wind power output can be reflected more accurately, and the influence of a scheduling operation strategy on the power supply reliability of the system can be considered.

Description

technical field [0001] The invention relates to the fields of energy storage and wind farms, in particular to a reliability evaluation method for interval power supply of power grids containing energy storage taking into account supply and demand uncertainties. Background technique [0002] With the gradual increase of the grid-connected capacity of renewable energy such as wind power, the uncertainty of the power system is mainly caused by the double superposition of the uncertainty of wind power output and the uncertainty of load demand. As a flexible regulation resource, energy storage technology provides an effective solution for wind power grid integration. At present, the power supply reliability assessment of the power system mainly focuses on the reliability assessment of determinism, while the reliability assessment of uncertainty is less. The key to the reliability assessment of power system uncertainty is to control the uncertainty of wind power output and load d...

AI Technical Summary

Problems solved by technology

The commonality of these two methods is that a large amount of sample data is required. Without a large amount of sample data as support, the evaluation accuracy of these two methods is low, and a large amount of sample data means that a large amount of data is required. Calculation processing, very slow

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