Power distribution network flexibility evaluation method for regulation demands

Abstract

The invention discloses a power distribution network flexibility evaluation method. At present, the definition of the power distribution network flexibility is fuzzy, and therefore the problem that corresponding research on flexibility evaluation and analysis is deficient is generated. The method comprises the steps that structure parameters and operation data of a power distribution network are acquired; flexibility resources of the power distribution network are classified, and probability distribution of operation features of the flexibility resources is subjected to hypothesis testing by adopting a K-S method; the flexibility resource response accuracy degree is calculated, and the time scale of flexibility evaluation is determined; research objects of evaluation are classified, and corresponding two-way separation and calculation of regulation demands are conducted; system loads and wind-light output scenes are analyzed; a flexibility evaluation two-layer index system model is built and solved; and a flexibility evaluation result of the power distribution network in an evaluation cycle is calculated through weighting by means of an entropy weight method. According to the method, the flexibility in the operation cycle of the power distribution network is subjected to comprehensive quantitative evaluation, the index weight is determined by adopting the objective entropy weight method, the evaluation result is scientific and reasonable and can provide further reference and guidance for planning and optimizing operation of the power distribution network.

Description

technical field [0001] The invention relates to the field of distribution network flexibility evaluation, in particular to a distribution network flexibility evaluation method oriented to regulation requirements, involving definition of flexibility resources in distribution network, flexibility demand analysis, and distribution network flexibility evaluation Index solution and construction of distribution network flexibility evaluation system. Background technique [0002] With the increasing proportion of renewable distributed power access and the gradual development of smart grid technology, the current power system mainly presents four characteristics: The first is the strong uncertainty of power balance. The randomness and intermittency of renewable energy output lead to increased uncertainty on both sides of the source and load, and the traditional static power flow balance will develop in a probabilistic direction. The second is the two-way trend. The commissioning o...

AI Technical Summary

Problems solved by technology

The second is the two-way trend

There is a gap in the analysis and evaluation of flexibility at the distribution network level

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