Power distribution network elastic capability evaluation method and system under multi-energy coupling

Abstract

The invention discloses a power distribution network elastic capability evaluation method and system under multi-energy coupling. The method comprises the following steps: acquiring an elastic evaluation index influencing the elastic capacity of the power distribution network under multi-energy coupling; adopting a grey correlation analysis method to judge the correlation among the elastic evaluation indexes; according to a power distribution network operation mechanism under multi-energy coupling, determining an index association relationship and an influence direction between associated indexes by adopting a logic analysis method; and according to the index association relationship and the influence direction, constructing a power distribution network elasticity evaluation index model byadopting a network analytic hierarchy process, and performing power distribution network elasticity capability evaluation on the to-be-evaluated power distribution network operation data. Under the multi-energy coupling system, influence factors influencing the elastic capacity of the power distribution network are analyzed, the incidence relation of the index pieces is fully considered, a multi-dimensional elastic evaluation index system is constructed, and the elastic capacity of the power distribution network under the multi-energy coupling system is comprehensively evaluated.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a method and system for evaluating the elastic capacity of a distribution network under multi-energy coupling. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] With the increasing frequency of large-scale power outages caused by extreme natural disasters, the concept of resilience has gained attention in the power system. Specifically at the distribution network level, the resilience of the distribution network reflects the extreme When a disturbance event occurs, minimize the scope of the disturbance, reduce the load loss during the failure process, and restore the ability to the normal load supply state as soon as possible. Effective evaluation of distribution network resilience is an important theoretical basis to guide the constructio...

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Problems solved by technology

[0005] (1) The form of the elastic evaluation index adopted is single, and a complete evaluation index system has not been formed;

[0006] (2) There are no indicators involving other energy forms such as gas and heat, and it is impossible to quantify the impact of multi-energy coupling on the elasticity of distribution networks;

[0007] (3) Assuming that each elasticity evaluation index is absolutely independent, ignoring the correlation, correlation and influence direction between the indexes, resulting in large errors in the evaluation results and limited application

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