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A tripping sequence recognition method for high-voltage AC line protection

A line protection, high-voltage AC technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problem of time-consuming and labor-intensive switching action information, and achieve the effect of speeding up fault handling, easy implementation, and improving efficiency and accuracy.

Active Publication Date: 2019-11-12
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the problems in the prior art that it takes time and effort for regulators to manually identify protection and switch action information in the protection trip sequence, and it is difficult to quickly judge whether there is a missing signal, and provides a method for identifying the protection trip sequence of an ultra-high voltage AC line , when it is applied, it can convert manual identification of tripping sequence into automatic identification, improve the efficiency and accuracy of protection tripping sequence identification, find out whether there is a missing signal in time, and speed up fault handling, and it is easy to implement in practical applications without adding new equipment , only need to add a tripping sequence identification module, it will not affect the supervision of the control personnel

Method used

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  • A tripping sequence recognition method for high-voltage AC line protection
  • A tripping sequence recognition method for high-voltage AC line protection
  • A tripping sequence recognition method for high-voltage AC line protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] A method for identifying the trip sequence of ultra-high voltage AC line protection, the method comprising the following steps:

[0028] S1: Use the protection and switch action information of the high-voltage AC line protection after the correct tripping as the line protection trip event template. According to the action of the recloser after the trip, three conditions are formed under the failure recloser, the recloser succeeded, and the recloser failed. The trip event template of, denoted as M1, M2 and M3;

[0029] S2: Perform fusion processing on the protection and switch action information in templates M1, M2 and M3 to form a total trip event template MT, which contains all the protection switch action information in M1, M2 and M3, and each piece of information is combined with other information Different

[0030] S3: Digitally encode the protection and switch action information in the templates M1, M2, M3 and the master template MT, and convert the information from fiel...

Embodiment 2

[0036] This embodiment refines the specific implementation method of each step of the above embodiment 1. In the step S1, three trip event templates M1, M2, and M3 are formed: no reclosing failure, successful reclosing and failed reclosing. M1 has no reclosing and switch closing information, M2 has reclosing or switch closing information, M3 has reclosing or switch closing information or switch opening information, and the switch opening information is one more time than the closing information.

[0037] In the step S2, the protection and switch action information in the templates M1, M2, and M3 are fused to generate a total trip event template MT. The formation process is as follows: There are a total of a piece of alarm information in M1, which are x1, x2, and x3. , X4, x5,..., xa; There are a total of b alarm messages in M2, which are x1, x2, x3, x4, x5, x6,..., xb; there are a total of c alarm messages in M3, which are x1, x2, x3 , X4, x5, x6, x7,..., xc; the total template M...

Embodiment 3

[0042] Such as figure 1 As shown, in conjunction with the foregoing embodiment, this embodiment discloses a specific application example of the foregoing method. Specifically, taking an ultra-high voltage AC transmission line fault as an example, a protection trip sequence identification example is provided.

[0043] Take a 220kV line as an example. After a 220kV line fails, the trip sequence templates formed by the protection and switch action information are shown in Table 1 to Table 3.

[0044] Table 1 220kV line phase-to-phase fault protection action and no reclosing sequence template M1

[0045]

[0046] Table 2 220kV line fault protection action and successful reclosing sequence template M2

[0047]

[0048] Table 3 220kV line fault protection action and reclosing failure sequence template M3

[0049]

[0050]

[0051] The protection and switch action information in Table 1 to Table 3 are fused to form a total trip event template MT, and each piece of information is digitally cod...

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PUM

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Abstract

A method for identifing tripping sequence of EHV AC line protection comprises the following steps: taking the protection and switching action information after the correct trip of the high-voltage ACline protection as the trip event template of the line protection, respectively forming the trip event templates M1, M2 and M3 under three kinds of conditions according to the reclosing action situation after the trip; M1, M2 and M3 are fused to form the total trip event template MT. M1, M2, M3 and MT are digitally encoded to form the digital sets QT1, QT2, QT3 and QT of different information types in the template, and the protection and switching action information in M1, M2, M3 and MT are digitally encoded. Forming a template M0 to be matched; Matching the information in the template M0 to be matched with the information in the total template MT in turn to form a matching set QP corresponding to the template M0 to be matched; according to the matching set QP, the trip event type is identified and the actual trip event type is determined. According to the actual tripping event type, it is judged whether there is leakage signal or not.

Description

Technical field [0001] The invention relates to the field of identification of trip sequence of ultra-high voltage AC line protection, in particular to an identification method of trip sequence of ultra-high voltage AC line protection. Background technique [0002] As the backbone of the regional power grid, UHV transmission lines play an important role in the safe operation of the entire power grid. Due to the long transmission distances of UHV transmission lines, they often cross different terrains and are susceptible to failures due to wind and external forces. After the UHV line fails, it depends on the accurate and quick action of the protection to remove the fault. Whether the protection can operate correctly or not directly affects the safe and reliable operation of the power grid. In the actual control operation, the control personnel judge the fault situation and the protection action according to the protection action information and switch action information in the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26
CPCH02H7/26H02H7/261
Inventor 李小鹏滕予非何明高剑李熠何锐龙呈李世龙
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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