A Robust Dynamic Reconfiguration Method for Three-phase Unbalanced Distribution Network Considering Uncertainty Budget

An uncertainty and dynamic reconfiguration technology, applied in the field of distribution network, can solve problems such as injection power uncertainty, line parameter asymmetry, and power imbalance of each phase, so as to improve engineering application ability, good adaptability, value-enhancing effect

Active Publication Date: 2021-05-11
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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  • A Robust Dynamic Reconfiguration Method for Three-phase Unbalanced Distribution Network Considering Uncertainty Budget
  • A Robust Dynamic Reconfiguration Method for Three-phase Unbalanced Distribution Network Considering Uncertainty Budget
  • A Robust Dynamic Reconfiguration Method for Three-phase Unbalanced Distribution Network Considering Uncertainty Budget

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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 unbalanced distribution network robust dynamic reconfiguration method considering the uncertainty budget, and the invention makes up for the current distribution network reconfiguration technology's consideration of distribution network injection power fluctuation and uncertainty In order to solve the shortcomings, a robust dynamic reconfiguration model of three-phase unbalanced distribution network is established, considering the influence of uncertainty on reconfiguration under the condition of multi-period dynamic changes of injected power, and changing the range of uncertainty set by controlling the uncertainty budget, It also analyzes the conservative and robust control effects of the robust reconfiguration scheme, and provides theoretical support for the reconfiguration technology of the smart distribution network under the high penetration rate of distributed power generation.

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 Patents(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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