Uncertain set construction method and system suitable for robust optimization of integrated energy microgrid

Abstract

The embodiment of the invention provides an uncertainty set construction method and system suitable for integrated energy microgrid robust optimization, and the method comprises the steps: generating an uncertainty error sample set, and solving a mean value and a covariance matrix of the sample set; and finding information such as correlation, feature values and feature vectors of the samples by using PCA. For example, the characteristic value and the characteristic vector are used for determining the semi-axis length and the axis direction of the internal ellipsoid; dividing a sample set region into k intervals, and establishing a high-dimensional ellipsoid region; and constructing k convex hulls from the point sets of the k intervals based on a Quickfull convex hull algorithm, and finally establishing an uncertainty set based on the multi-interval convex hulls. On the basis of the uncertainty set of the multi-interval convex hull, the correlation between uncertainties is considered, and a plurality of appropriate intervals are set, so that a scene with a relatively small occurrence probability in practice is avoided, and the conservative degree of robust optimization is reduced.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of integrated energy microgrids, in particular to an uncertain set construction method and system suitable for robust optimization of integrated energy microgrids. Background technique [0002] With the increasingly serious problems of energy shortage and environmental pollution, it is an urgent need for human society to seek a low-carbon and green development model. The concept of Energy Internet and integrated energy system has provided an important direction for energy development. In order to be able to carry out overall planning and scheduling of heterogeneous energy networks, scholars have proposed a unified planning and scheduling model for integrated energy microgrids based on energy hubs. The integrated energy micro-grid greatly improves the energy utilization rate through the coordinated conversion, transmission and storage of various forms of energy such as electricity, heat...

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Problems solved by technology

However, the above-mentioned single-interval convex hull uncertainty sets (SCHUS) that only consider a single interval make the worst case be the extreme point of the outermost convex hull, and these extreme cases will only occur with a small probability in practice , so that its scheduling scheme is still conservative

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