Active power distribution network robust reconstruction method considering node injection power uncertainty

A node injection power and uncertainty technology, applied in the field of robust reconstruction of the active distribution network, can solve the problems of low accuracy of the piecewise linear method, no consideration of charging load modeling, modeling analysis, etc., to achieve active The distribution network robust reconfiguration model is accurate, the application value is great, and the effect of accelerating online application

Active Publication Date: 2018-01-16
SOUTHEAST UNIV
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Problems solved by technology

[0004] At present, a lot of research work has been carried out at home and abroad on the robust reconstruction technology of active distribution network considering the node injection power uncertainty, but most of the research work has a certain subjective initiative in the selection of the number of injection power intervals in the network. There is no

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  • Active power distribution network robust reconstruction method considering node injection power uncertainty
  • Active power distribution network robust reconstruction method considering node injection power uncertainty
  • Active power distribution network robust reconstruction method considering node injection power uncertainty

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Embodiment Construction

[0021] Based on the existing theoretical research, the affine number is used to analyze and model the uncertainty of distributed power output and load demand reasonably, and the objective function is established to comprehensively consider the minimum number of network switch actions and the minimum network active loss. Robust reconfiguration model of active distribution network taking into account the constraints of network security operation. In order to solve the mathematical model accurately, firstly, a piecewise linear approximation method based on the best isometric idea is introduced to relax the original objective function into a linearly solvable form; secondly, according to the duality theorem, the model is further equivalently transformed into a two-level mixed integer linear programming problem; finally, an efficient decomposition algorithm is used to solve the model, which can further improve the computational efficiency of the algorithm. The invention makes up fo...

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Abstract

The invention discloses an active power distribution network robust reconstruction method considering node injection power uncertainty. On the basis of performing reasonable analysis and modeling on the output and load demand uncertainties of a distributed power supply by an affine number, an active power distribution network robust reconstruction model, which takes the minimum number of times ofnetwork on-off actions and the lowest network active loss as the target function and takes the network safety operation as the constraint condition, is established. By virtue of the active power distribution network robust reconstruction method, the shortcoming of neglecting of distributed power supply output intermittency and electric vehicle charging in the current power distribution network reconfiguration scheme can be overcome, so that supporting can be provided for safety evaluation of the active power distribution network in the next step.

Description

technical field [0001] The invention relates to a robust reconstruction method of an active distribution network considering the uncertainty of node injection power, and belongs to the technical field of optimal operation and control of the active distribution network. Background technique [0002] The grid connection of distributed generation (DG) power generation such as photovoltaic power plants and wind turbines with high penetration rate and the large-scale access and application of active loads such as electric vehicles (EV) make the traditional one-way radial power distribution The power grid is gradually transformed into a multi-energy power supply system, and if necessary, it is assisted by an active distribution network (ADN) that operates in a weak ring topology. At the same time, distributed power sources and active loads easily lead to strong uncertainty in the injected power of the distribution network. The traditional distribution network network reconfigurati...

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Application Information

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IPC IPC(8): H02J3/46
Inventor 吴在军徐俊俊周力李培帅窦晓波顾伟
Owner SOUTHEAST UNIV
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