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Differential protection locking system and method for abnormal data collection of electronic transformer

An electronic transformer and differential protection technology, which is applied in emergency protection circuit devices, pattern recognition in signals, information technology support systems, etc., can solve the problem of unreliable current data of differential protection device misoperation and continuous mutation abnormality Judging and analyzing functions and other issues to achieve the effect of preventing misoperation, shortening troubleshooting time, and reducing reliability

Active Publication Date: 2021-04-20
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the digital substation differential protection device has the functions of identification, synchronous inspection and breakpoint inspection for current and other data collection information, but it has no reliable judgment and analysis function for the current data with continuous sudden changes, which leads to the differential protection device using this current data Misoperation, how to screen the validity of the abnormal data output by the electronic transformer, and reliably block the differential protection according to the screening results, so as to avoid the misoperation of the protection device

Method used

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  • Differential protection locking system and method for abnormal data collection of electronic transformer
  • Differential protection locking system and method for abnormal data collection of electronic transformer
  • Differential protection locking system and method for abnormal data collection of electronic transformer

Examples

Experimental program
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Embodiment 1

[0067] Such as Figure 1-4 As shown, the differential protection locking system with abnormal electronic transformer data collection includes

[0068] Abnormal data fault algorithm module 2, which is used to check the validity of each current data, and then output a blocking signal;

[0069] The protection operation main program algorithm module 24 is used to complete the differential protection operation, and then calculate and reach the preset action value of the differential protection to complete the start-up protection function;

[0070] The protection action output algorithm module 4 is used to complete the differential protection action output, and judges whether to open the action output by connecting with the output interface of the abnormal data fault algorithm module 2, and through the output interface with the main program algorithm module 24 of the protection operation connection to judge whether the differential protection is activated;

[0071] The output of t...

Embodiment 2

[0086] Such as Figure 1-4 As shown, the method for using the electronic transformer data collection abnormality differential protection locking system described in Embodiment 1 includes the following steps:

[0087] S1. The merging unit 1 distributes the output signals of the electronic transformers in the substation to the current data of each channel through the abnormal data fault algorithm module 2; the current data of each channel passes through the abnormal data fault algorithm module 2 and the main program algorithm module 24 for protection operation is synchronized process;

[0088] S2. Input the results of the abnormal data fault algorithm module 2 and the protection operation main program algorithm module 24 into the protection action output algorithm module 4 for logical judgment, and then output through state decision.

[0089] The specific steps of the abnormal data failure algorithm in step S1 are as follows:

[0090] SA1, the abnormal data fault algorithm sta...

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Abstract

The invention relates to the field of digital substation relay protection, in particular to a differential protection locking system and method for abnormal data collection of electronic transformers. The system includes an abnormal data fault algorithm module, a protection operation main program algorithm module, and a protection action output algorithm module. The protection action output algorithm module is connected with the output interface of the abnormal data fault algorithm module to judge whether to open the action output, and judge whether the differential protection is started by connecting with the output interface of the protection operation main program algorithm module; It is connected with the input end of the abnormal data fault algorithm module and the main program algorithm module for protection operation. The advantage of the invention is that: the invention builds various algorithm modules with independent operation capability, parallel execution and independent interface, through the combined use of each module, differential protection can be completed to judge and block abnormal data.

Description

technical field [0001] The invention relates to the field of digital substation relay protection, in particular to a differential protection locking system and method for abnormal data collection of electronic transformers. Background technique [0002] Digital substation technology is the main technical direction of power grid development at present. Electronic transformers and digital optical fiber transmission technologies have replaced traditional electromagnetic transformers; electronic transformers collect primary current values, and the data is transmitted to the merged unit, and the merging unit forwards the data to each interval device. Starting from the transmission of the acquisition unit, the transmitted information is all digital, and the digital disturbance range breaks through the range of traditional analog transmission. [0003] At present, the digital substation differential protection device has the functions of label discrimination, synchronous inspectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H1/00H02H7/00
CPCH02H7/00H02H1/0007H02H1/0092G06F2218/04Y04S40/124
Inventor 苏建明徐广源朱德亮张东姚晖王文婷
Owner STATE GRID CORP OF CHINA