Three-phase imbalanced power distribution network robust dynamic reconfiguration method taking uncertain budget into consideration

An uncertain and dynamic reconfiguration technology, applied in the field of distribution network, can solve the problems of uncertainty of injected power, asymmetry of line parameters, unbalanced power of each phase, etc.

Active Publication Date: 2018-09-28
SOUTHEAST UNIV
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a robust dynamic reconfiguration method for three-phase unbalanced distribution network considering the uncertainty budget, which can solve the current power imbalance of each phase, line parameter asymmetry and injection power imbalance. deterministic problem

Method used

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  • Three-phase imbalanced power distribution network robust dynamic reconfiguration method taking uncertain budget into consideration
  • Three-phase imbalanced power distribution network robust dynamic reconfiguration method taking uncertain budget into consideration
  • Three-phase imbalanced power distribution network robust dynamic reconfiguration method taking uncertain budget into consideration

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Embodiment Construction

[0111] Such as figure 1 As shown, a robust dynamic reconfiguration method for three-phase unbalanced distribution network considering uncertainty budget includes the following steps:

[0112] Step 1: On the basis of predicting the injected power of wind turbines, photovoltaic generators and loads in each period, and using the idea of ​​uncertainty budget to model the interval modeling of the uncertain set of injected power. The specific implementation process is as follows.

[0113] (1) Establish an uncertain set model of wind turbine injection power. The intermittent output of wind turbines in one day is mainly caused by the change of local wind speed. Taking the Weibull distribution as an example to simulate the probability density function of wind speed, the expression is as follows:

[0114]

[0115] In the formula: v represents the wind speed; k and c represent the shape parameters and scale parameters of the wind turbine, respectively. It is easy to know that the ...

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Abstract

The invention discloses a three-phase imbalanced power distribution network robust dynamic reconfiguration method taking an uncertainty budget into consideration. According to the method, the defect that in an existing power distribution network reconfiguration technology, power distribution network injection power fluctuation and uncertainty are not taken into full consideration is made up; a three-phase imbalanced power distribution network robust dynamic reconfiguration model is established; the influence of the uncertainty on the reconfiguration under the condition that the injection poweris dynamically changed in a plurality of periods is taken into consideration; an uncertain set range is changed through control over the uncertainty budget; the conservative property and robustness control effect of a robust reconfiguration scheme are analyzed; and the theoretical support is provided for the reconfiguration technology of an intelligent power distribution network under the condition that a distributed power supply is connected in high permeability.

Description

technical field [0001] The invention relates to the technical field of distribution networks, in particular to a robust dynamic reconfiguration method for a three-phase unbalanced distribution network considering an uncertainty budget. Background technique [0002] With the rapid development of renewable energy technology, a large number of distributed generators (distributed generators, DG) mainly based on wind power and photovoltaics are connected to the power distribution system, which can effectively improve the power supply reliability of the distribution network. However, its flexible access characteristics and its output intermittency and volatility will greatly increase the uncertainty of distribution network operation, and the traditional distribution network reconfiguration technology is facing great challenges. Therefore, it is necessary to consider the influence of the uncertainty of DG and load injection power on reconfiguration on the basis of reasonable modeli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 吴在军成晟徐俊俊窦晓波胡敏强
Owner SOUTHEAST UNIV
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