Method, device and equipment for establishing DG-containing short-circuit current calculation model

A short-circuit current and calculation model technology, applied in computer-aided design, calculation, electrical digital data processing, etc., can solve problems such as large number of nodes and branches, slow calculation speed, and heavy modeling and calculation workload

Active Publication Date: 2020-08-21
GUANGDONG POWER GRID CO LTD DONGGUAN POWER SUPPLY BUREAU
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  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the establishment method of the existing short-circuit current calculation model is usually based on the establishment of the entire power grid. The system model includes the parameters and topology information of the power supply, lines, and transformers of the entire synchronous power grid, and involves many nodes and branches. Modeling The calculation workload is heavy and the calculation speed is slow

Method used

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  • Method, device and equipment for establishing DG-containing short-circuit current calculation model

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Embodiment 1

[0042] figure 1 It is a flowchart of a method for establishing a short-circuit current calculation model containing DG provided by Embodiment 1 of the present invention. This embodiment is applicable to situations such as establishing a short-circuit current calculation model containing DG. The establishment device of calculation model is carried out, and this device can be realized by the mode of software and / or hardware, and this device can be integrated in the electronic equipment such as computer with the establishment function of short-circuit current calculation model, specifically comprises the following steps:

[0043] Step 110, determine a simplified diagram of the grid structure according to the grid structure of the distributed power grid.

[0044] Among them, the distributed power supply can be a motor-type distributed power supply, which can be obtained by determining the number of outgoing lines of the bus in the power grid, dividing each main line into multiple ...

Embodiment 2

[0052] image 3 It is a flowchart of a method for establishing a short-circuit current calculation model containing DG provided by Embodiment 2 of the present invention. This embodiment is applicable to situations such as establishing a short-circuit current calculation model containing DG. The establishment device of calculation model is carried out, and this device can be realized by the mode of software and / or hardware, and this device can be integrated in the electronic equipment such as computer with the establishment function of short-circuit current calculation model, specifically comprises the following steps:

[0053] Step 210 , according to the preset wiring mode and the voltage of the busbars in the grid-connected distributed power generation, determine the number of outgoing lines of the busbars in the grid.

[0054] As an example, take the 10 kV busbar of a single-section substation as an example, such as the 110 kV grid in Dongguan, where the 3T wiring method is ...

Embodiment 3

[0101] Figure 4 It is a structural block diagram of a device for establishing a short-circuit current calculation model including DG provided by Embodiment 3 of the present invention. The device includes a simplified diagram determination module 310, a parameter determination module 320, and a model establishment module 330; wherein, the simplified diagram determination module 310 It is used to determine the simplified diagram of the grid structure according to the grid structure of the distributed power grid; the parameter determination module 320 is used to determine the boundary conditions and model parameters of the short-circuit current calculation model according to the parameters of the distributed power supply, the line parameters of the grid and the parameters of the substation equipment The model establishment module 33 is used to establish a short-circuit current calculation model based on the simplified diagram of the grid structure, boundary conditions and model p...

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Abstract

The embodiment of the invention discloses a method, device and equipment for establishing a DG-containing short-circuit current calculation model. The method comprises the following steps: determininga simplified graph of a power grid structure according to the power grid structure of distributed power supply grid connection; determining boundary conditions and model parameters of a short-circuitcurrent calculation model according to the distributed power supply parameters, the line parameters of the power grid and the transformer substation equipment parameters; and based on the simplifiedgraph of the power grid structure, the boundary conditions and the model parameters, establishing a short-circuit current calculation model to calculate the short-circuit current. According to the method, device and equipment for establishing the DG-containing short-circuit current calculation model provided by the embodiment of the invention, the workload of establishing the model can be reduced,and the calculation speed is increased.

Description

technical field [0001] Embodiments of the present invention relate to short-circuit current technology, and in particular to a method, device and equipment for establishing a short-circuit current calculation model including DG. Background technique [0002] In the field of power systems, the level of short-circuit current is an important indicator that affects whether the power system can operate safely. Therefore, it is necessary to establish a short-circuit current calculation model to calculate the short-circuit current in the power grid through the established short-circuit current calculation model. [0003] At present, the establishment method of the existing short-circuit current calculation model is usually based on the establishment of the entire power grid. The system model includes the parameters and topology information of the power supply, lines, and transformers of the entire synchronous power grid, and involves many nodes and branches. Modeling The calculati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F113/04
CPCG06F30/20G06F2113/04Y02E60/00
Inventor 李俊辉钟锦星王凯亮庾力维
Owner GUANGDONG POWER GRID CO LTD DONGGUAN POWER SUPPLY BUREAU
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