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

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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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 reasonable modeling analysis for its upper and lower limits, and the established active distribution network robust reconstruction model does not take into account an important type of load-electric vehicle charging load modeling

In addition, the piecewise linear method used for linearizing the relaxation of nonlinear variables in the model is less accurate

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