Source-load joint time sequence scene generation method and system for active power distribution network

An active distribution network and timing technology, applied in the electric power field, can solve problems such as low-quality clustering of power supply and load data, unsuitable clustering, etc., and achieve the effect of improving planning efficiency

CN113822319APending Publication Date: 2021-12-21HUNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-12-21

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Abstract

The embodiment of the invention provides a source-load joint time sequence scene generation method and system for an active power distribution network, and the method comprises the steps: constructing an initial source-load joint time sequence scene through original data, calculating a DTW distance, an Euclidean distance and a source-load correlation distance between all scenes, generating a weight coefficient of each index through a principal component method, calculating a similarity measurement index between the scenes, selecting the number of typical scenes by using an elbow method and a contour coefficient, and randomly selecting a clustering center; and discriminating the reasonability of typical scene selection by using the clustering divergence. According to the embodiment of the invention, the time shifting characteristic of the time sequence is fully considered, the correlation between the load and the distributed power supply can be described more accurately, and the problem of poor clustering effect of the continuous time curve under the multi-dimensional array can be solved; and, in addition, the method can describe the randomness and intermittency of load and distributed power supply output more accurately by using fewer typical scenes, and the planning efficiency of the active power distribution network is improved.
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Description

technical field

[0001] Embodiments of the present invention relate to the field of electric power technology, and in particular, to a method and system for generating a source-load joint time sequence scenario for an active distribution network. Background technique

[0002] In order to get rid of the excessive dependence on fossil energy and speed up the energy transformation, my country has proposed the goal of "carbon peaking and carbon neutrality". Increasing the proportion of renewable energy generation (such as wind power and photovoltaics) in the grid is an important means to achieve this goal. The staggered output of wind power, photovoltaics and loads and the intermittent output directly affect the consumption of distributed power by the distribution network. Therefore, in the planning or operation optimization of active distribution network, the uncertainty and correlation between distributed power and load should be fully considered.

[0003] Existing studies ha...

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Embodiment Construction

[0063] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0064] The term "and / or" in this embodiment of the present application is only an association relationship to describe associated objects, indicating that there may be three kinds of relationships, for example, A and / or B, which may indicate that A exists alone, and A and B exist at the same time. , there are three cases of B alone....