Protection system abnormal event diagnosis system and method based on fault tree analysis
A technology of fault tree analysis and abnormal events, which is applied to emergency protection circuit devices, electrical components, circuit devices, etc., can solve the problems of long time consumption and low efficiency, and achieve the effect of improving reliability and facilitating fast and reliable diagnosis
Active Publication Date: 2019-05-28
SHANGHAI YIHAO AUTOMATION CO LTD
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Problems solved by technology
At present, the identification of abnormal events in the intelligent substation protection system mainly relies on manual work, which is time-consuming and inefficient
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[0038] Such as figure 1 As shown, a protection system abnormal event diagnosis system based on fault tree analysis, the protection system refers to: take the primary equipment (line, transformer, busbar, etc.) as the protection object, and is used to isolate the fault when the protected primary equipment fails Point control system, protection system abnormal event diagnosis system includes man-machine interface module 1, event construction module 2, network communication module 3, status evaluation module 4 and defect diagnosis module 5.
[0039] specifically:
[0040] (A) Man-machine interface module 1: Obtain SCD and SPCD files and analyze them to obtain the protection system RBD diagram (protection system reliability block diagram). The RBD diagram includes the basic components in the protection system; where, the protection system RBD diagram refers to The structural analysis method describes the physical connection and functional logic diagram of each unit in the protect...
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The invention relates to a protection system abnormal event diagnosis system and method based on fault tree analysis. The abnormal event diagnosis system comprises a man-machine interface module, an event construction module, a network communication module, a state evaluation module and a defect diagnosis module, wherein the man-machine interface module is used for obtaining SCD and SPCD files andanalyzing the SCD and SPCD files to obtain a protection system RBD graph comprising a basic element in a protection system; the event construction module is used for constructing an abnormal event defect level evaluation rule of a basic element in the protection system RBD graph; the network communication module is used for acquiring real-time message information of the protection system; the state evaluation module is used for matching the real-time message information with the protection system RBD graph to form an abnormal event data set; and the defect diagnosis module is used for establishing abnormal event models based on a fault tree analysis method, performing layer-by-layer diagnosis and evaluation on the two layers of abnormal event models according to an abnormal event data setand an abnormal event defect level evaluation rule, and determining the defect level of the protection system. Compared with the prior art, the method achieves the automatic diagnosis of abnormal events, and facilitates the improvement of the power supply reliability of a power system.
Description
technical field [0001] The invention relates to a protection system abnormal event diagnosis system and method, in particular to a protection system abnormal event diagnosis system and method based on fault tree analysis. Background technique [0002] The smart substation is based on the IEC61850 system, and uses the SCD system configuration tool to describe the secondary system of the smart substation. The protection system covers the merging unit, smart terminal, protection device and process layer switch, etc., and sends the real-time operating status of the protection system through SV, GOOSE, and MMS messages. Therefore, it is very necessary for smart substations to effectively identify abnormal events in the protection system and provide decision-making basis for the condition-based maintenance of the protection system. At present, the identification of abnormal events in the intelligent substation protection system mainly relies on manual work, which is time-consuming...
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IPC IPC(8): H02H7/22H02J13/00
Inventor 高翔
Owner SHANGHAI YIHAO AUTOMATION CO LTD