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Two-step decision-making method for optimized access of flexible multi-state switch

A decision-making method and multi-state technology, applied in the communication network with the same frequency from different sources, the communication network with energy trade/energy transmission authority, the communication network circuit, etc., can solve the strong subjectivity and unified scale of AHP Complicated and computationally intensive problems

Inactive Publication Date: 2020-01-31
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

Among them, the analytic hierarchy process is highly subjective and requires a large amount of calculation; the combined weighting method considers the uncertainty of the index weights obtained by different weighting methods and the consistency with the real weights, but the unification of scales is more complicated

Method used

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  • Two-step decision-making method for optimized access of flexible multi-state switch
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  • Two-step decision-making method for optimized access of flexible multi-state switch

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Step 1: Preliminary screening of flexible multi-state switch access locations based on external features. Indexes of load balancing degree, important users, and number of distributed power sources are established.

[0034] (1) The degree of load balancing. Taking three ports as an example, let the loads connected to the flexible switches of each port be L1, L2, L3 respectively, and the sum of the absolute values ​​of the maximum load difference is L max .

[0035] L max =|L1-L2|+|L1-L3|+|L2-L3| (1)

[0036] (2) The proportion of important users in the location where the flexible switch is placed.

[0037]

[0038] (3) The number of distributed power sources accepted.

[0039] S DG = S DG,L1 +S DG,L2 +S DG,L3 (3)

[0040] Such as figure 1 As shown, the index may also include: the land price and the connection distance of the flexible switch. C 地...

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Abstract

The invention belongs to the technical field of the access optimization of the flexible multi-state switches of distribution networks and relates to a two-step decision-making method for the optimal access of a flexible multi-state switch. The method comprises the following steps that: step 1, flexible multi-state switch access position preliminary screening indexes based on external characteristics are established, and the indexes are normalized and sorted; 2, a multi-index flexible multi-state switch optimal access comprehensive decision calculation model considering system reliability, voltage deviation and distributed power source acceptance capability is established; 3, system reliability is evaluated based on a power flow equation and a constraint condition which are satisfied by theoperation optimization of the flexible multi-state switch; and step 4, a grey correlation analysis-based multi-index decision model is established, a weight assigned value is determined, so that an optimal scheme can be finally determined. According to the method, the scientificity of decision making is improved through multi-index comprehensive decision making; two-stage decomposition is adopted, and therefore, a calculated quantity is reduced, and optimization efficiency is improved; and green, safe and sustainable power distribution network construction is effectively supported.

Description

technical field [0001] The invention belongs to the technical field of access optimization of flexible multi-state switches in distribution networks, and in particular relates to a two-step decision-making method for optimal access of flexible multi-state switches. Background technique [0002] With the gradual advancement of the national new energy and electricity reform policies, a large number of distributed energy sources, electric vehicle charging devices, energy storage devices and micro-grids are connected to the distribution network, and the penetration rate continues to increase. The randomness of new energy sources and loads is likely to cause large fluctuations in feeder power and voltage limits, making the operation of the distribution network face severe challenges such as severe voltage fluctuations and large line losses. At the same time, network reconfiguration based on tie switches is limited by issues such as switch response speed, operating life, and inrus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/06H02J3/00
CPCH02J3/008H02J3/06
Inventor 王志强徐艺铭方正刘文霞
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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