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Power distribution network protection method and device and storage medium

A protection device and distribution network technology, applied in the field of distribution network, can solve problems such as reducing the reliability of distribution network protection system, and achieve the effect of high-efficiency protection

Pending Publication Date: 2022-03-04
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some nodes after upgrading and transformation, the distribution network protection decision-making is realized by using directional current protection, distance protection or differential protection. Different criteria are implemented in a master-backup manner, but each protection criterion operates independently , independently generate fault judgments, which reduces the reliability of the distribution network protection system

Method used

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  • Power distribution network protection method and device and storage medium
  • Power distribution network protection method and device and storage medium
  • Power distribution network protection method and device and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] figure 1 It is a schematic flow chart of a distribution network protection method provided by Embodiment 1 of the present invention. This embodiment is applicable to distribution network fault location and protection isolation. This method can be implemented by the distribution network protection device in the embodiment of the present invention To execute, the device can be implemented in software and / or hardware, such as figure 1 As shown, the method specifically includes the following steps:

[0027] S101. Determine a protection criterion and a confidence interval of the protection criterion, wherein the number of the protection criterion is an integer greater than or equal to 2.

[0028] Wherein, the confidence interval is an interval of the error range of the estimated overall mean, specifically, the interval includes the degree of credibility of the result of the overall mean. Specifically, the protection criterion includes at least two of the distance protectio...

Embodiment 2

[0071] The distribution network protection device provided in Embodiment 2 of the present invention can execute the distribution network protection method provided in any of the above-mentioned embodiments of the present invention, and has corresponding functional modules and beneficial effects for executing the method.

[0072] Figure 4 A schematic structural diagram of a distribution network protection device provided for Embodiment 2, such as Figure 4 As shown, it includes: a determination module 401 , a processing module 402 and a protection module 403 .

[0073] The determining module 401 is configured to determine a protection criterion and a confidence interval of the protection criterion, wherein the number of the protection criterion is an integer greater than or equal to 2.

[0074] The processing module 402 is used to construct a criterion action analysis model according to the confidence interval of the protection criterion.

[0075] The protection module 403 i...

Embodiment 3

[0084] Figure 5 It is a schematic structural diagram of a distribution network protection device in Embodiment 3 of the present invention. Figure 5 A block diagram of an exemplary distribution network protection device 12 suitable for implementing embodiments of the invention is shown. Figure 5 The distribution network protection device 12 shown is only an example, and should not impose any limitation on the function and application scope of the embodiment of the present invention.

[0085] Such as Figure 5 As shown, distribution network protection device 12 takes the form of a general-purpose computing device. Components of the distribution network protection device 12 may include, but are not limited to: one or more processors or processing units 16 , a system memory 28 , and a bus 18 connecting different system components (including the system memory 28 and the processing unit 16 ).

[0086] Bus 18 represents one or more of several types of bus structures, including ...

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Abstract

The invention discloses a power distribution network protection method and device and a storage medium, and the method comprises the steps: determining protection criteria and confidence intervals of the protection criteria, the number of the protection criteria being an integer greater than or equal to 2; constructing a criterion action condition analysis model according to the confidence interval of the protection criterion; and protecting the power distribution network according to the criterion action condition analysis model. Through the technical scheme of the invention, a multi-criterion fusion power distribution network protection method can be constructed, and power distribution network protection can be carried out comprehensively, accurately and efficiently.

Description

technical field [0001] The embodiments of the present invention relate to the field of distribution network technology, and in particular, to a distribution network protection method, device, and storage medium. Background technique [0002] With the development of distributed power generation and high proportion of new energy, the energy flow of distribution network has changed from traditional one-way flow to two-way flow. While improving the performance of distribution network, the network topology has become more complex. Therefore, distribution network The protection method of power grid is an important research content at present. [0003] The existing distribution network protection method uses three-stage current protection as the main criterion, and adopts a single criterion for fault protection decision-making. In some nodes after upgrading and transformation, the distribution network protection decision-making is realized by using directional current protection, ...

Claims

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Application Information

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IPC IPC(8): H02H7/28H02H3/00
CPCH02H7/28H02H3/006
Inventor 林志超罗步升陈文其沈瑞锡宋培芳王英民彭宏亮王晓晖谢恩培陈德军谭世钊高峰张友才李申乾许达培黄俊辉王晓光杨霖徐大勇
Owner GUANGDONG POWER GRID CO LTD