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Short-circuit current analysis method and device of regional power grid

A short-circuit current and regional power grid technology, applied in the field of power systems, can solve problems such as grid scale requirements, achieve the effect of reducing data volume, reducing data volume and calculation volume, and ensuring calculation accuracy

Active Publication Date: 2014-01-22
STATE GRID CORP OF CHINA +2
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Problems solved by technology

At the same time, due to the limitation of the algorithm of the program itself, some commercial software also has certain requirements on the scale of the power grid.
[0006] How to reduce the amount of data in short-circuit current analysis while ensuring the calculation accuracy of short-circuit current has not yet proposed an effective solution

Method used

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  • Short-circuit current analysis method and device of regional power grid
  • Short-circuit current analysis method and device of regional power grid
  • Short-circuit current analysis method and device of regional power grid

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0031] In the embodiment of the present invention, an analysis of the short-circuit current of the regional power grid is provided, such as figure 1 As shown, the method includes the following steps:

[0032] Step 101: Divide the power grid system into regions: divide the regions that need to analyze and calculate the short-circuit current level into the research regions, divide the regions that have direct contact with the research regions into the boundary regions, and divide the regions other than the research region and the boundary region into outside area;

[0033] Step 102: Perform equ...

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Abstract

The invention provides a short-circuit current analysis method and a device of a regional power grid. The method comprises the steps of regionalizing a power grid system: dividing a region with a short-circuit current level to be analyzed and calculated into a study area, dividing a region directly communicated with the study area into a boundary area, and dividing a region except the study area and the boundary area into an external area, performing equivalent simplification on the boundary area and the external area to form an equivalent boundary area, obtaining an equivalent power grid system consisting of the study area and the equivalent boundary area, and analyzing and calculating the short-circuit current level of the study area according to the equivalent power grid system. The method and the device solve the technical problems that the calculation accuracy of short-circuit current is difficult to guarantee in the prior art, and the data size during short-circuit current analysis is large, and achieves the technical effects of reducing the data size and calculation load during the short-circuit current analysis on the basis of ensuring the calculation accuracy of the short-circuit current.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to a method and device for analyzing the short-circuit current of a regional power grid. Background technique [0002] Short-circuit current calculation is an indispensable basic calculation in the design and operation of power systems. The results of short-circuit current calculation are generally used in the selection of electrical equipment and current-carrying conductors, the determination of relay protection devices, the main wiring scheme and operation determination of the method, etc. In addition, the short-circuit current calculation must also be carried out in the transient stability analysis of the power system and the determination of the interference of the transmission line on the communication. [0003] In recent years, with the continuous expansion of the scale of the power system, the connection between the power grids has gradually strengthened. Due...

Claims

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Application Information

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IPC IPC(8): G01R19/00G01R31/02G01R31/08
Inventor 杨金刚吴涛赵炜炜
Owner STATE GRID CORP OF CHINA
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