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Distribution network cable variable relationship identification method based on linear integer programming

A relationship identification and integer programming technology, applied in the electric power field, can solve the problems of distribution network scheduling, operation, management, heavy expansion tasks, inability to achieve generality and expected technical effects, etc. Distribution network topology identification, the effect of popularization and application value

Active Publication Date: 2019-12-10
CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER +1
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Problems solved by technology

[0003] However, due to the large number of distribution network elements, heavy expansion tasks, and frequent equipment changes, the workload of grid topology data management and maintenance is heavy, data entry and update are not timely, and the topology or line change relationship stored in the distribution system is inconsistent with the actual grid operation. This has brought great troubles to the scheduling, operation, and management of the distribution network, and the existing technology cannot achieve universality and expected technical effects. For example, using the method of on-site verification to verify the distribution network topology will consume a lot of Manpower and material resources, the voltage correlation analysis method cannot distinguish whether there are different 10kV lines on the same bus, and the heuristic analysis method is easy to fall into a local optimum, so that the entire network optimization of the distribution network cannot be obtained

Method used

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  • Distribution network cable variable relationship identification method based on linear integer programming
  • Distribution network cable variable relationship identification method based on linear integer programming
  • Distribution network cable variable relationship identification method based on linear integer programming

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Embodiment example

[0058] see figure 1 As shown, Embodiment 1 of the present invention provides a method for identifying the relationship between distribution network lines based on linear integer programming, and aims at such as figure 2 A typical distribution network system containing 4 distribution lines and 17 distribution transformers is shown as an implementation example. The method includes the following steps:

[0059] Step S1. Based on the energy conservation constraints and topological constraints of the power distribution network, establish a linear integer programming model for the identification of the distribution network line change relationship as shown in the following formula (1), and set the objective function of the model to be the loss of each distribution line line in the distribution network sum of rates;

[0060]

[0061] In formula (1), k represents the time slot number; i represents the distribution transformer number at the outlet of the distribution line; I repre...

Embodiment 2

[0108] Based on the foregoing embodiment scheme, with reference to Figure 4 As shown, Embodiment 2 of the present invention also provides a specific hardware structure of a distribution network line change relationship identification device based on linear integer programming. The device 4 may include: a memory 42 and a processor 43; each component is coupled together through a communication bus 41 . Understandably, the communication bus 41 is used to realize connection and communication between these components. In addition to the data bus, the communication bus 41 also includes a power bus, a control bus and a status signal bus. But for clarity, in image 3 The various buses are denoted as communication bus 41 in FIG.

[0109] The memory 42 is used to store the program of the method for identifying the distribution network line change relationship based on linear integer programming that can be run on the processor 43;

[0110] The processor 43 is configured to perform ...

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Abstract

The invention discloses a distribution network cable variable relationship identification method based on linear integer programming, which relates to the technical field of electric power, and comprises the steps of establishing a linear integer programming model based on energy conservation constraints and topological constraints of an electric power distribution network, and setting an objective function of the model as the sum of line loss rates of all distribution lines in the distribution network; acquiring electric degree data of a distribution line and a distribution transformer in each time period in the power distribution network; carrying out abnormal value detection, abnormal value and missing value processing, data conversion and data check preprocessing on the electrical degree data of the distribution line and the distribution transformer to obtain input data of the model; optimizing and solving the linear integer programming model by adopting a branch and bound algorithm based on the input data; and based on the optimal solution of the model, outputting an optimal combination of the variable relationship of the distribution network cable. According to the invention,the high-quality distribution network line transformation relationship can be rapidly obtained, the line loss rate is effectively reduced, and the power grid operation management level is improved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for identifying a distribution network line change relationship based on linear integer programming. Background technique [0002] When the distribution network is running, in order to reduce the network loss rate, balance the load and improve the reliability, it is necessary to adjust the network structure of the distribution network. Distribution network line-to-line transformer relationship refers to the relationship between the distribution transformer in the distribution network station area and the 10kV line it belongs to. It belongs to a distribution network topology, and its correctness is crucial for the calculation of distribution network loss and emergency repair of distribution network faults. are of great significance. [0003] However, due to the large number of distribution network elements, heavy expansion tasks, and frequent equipment changes, t...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06Y04S10/50Y02E40/70
Inventor 李晨曦汪雪婷孙辉赵凤国刘茗杰陈俊梁瀚文魏瑶朱丽侠胡袁邓婷婷
Owner CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER
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