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.
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[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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