Wide area relay protection method based on augmented state estimation |
Title： |
| Wide area relay protection method based on augmented state estimation |
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Application Number： |
200710120379 |
Application Date： |
2007/08/17 |
Announcement Date： |
2008/02/27 |
Pub. Date： |
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Publication Number： |
101132130 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H02H 7/26 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Zhang Boming, Wu Wenchuan, Lu Ying |
Key Words： |
Wide area, relay protection method, augmented state estimation |
Abstract： |
This invention relates to the wide area relay protection method based on augment estimate. The steps are: obtaining data measured from a branching and its adjacent branchings and the bus; jadging if the branchings meet the critera of main protective starting; writing-down measurement equations of each branchings and the bus; augmenting the informations of suspected fault branching into said equation; solving the equation system; testing and identifying bad data from the measurement; deleting the corresponding measurement equation, after that, the suspected fault branching being debermined as fault branching, proceeding corresponding relay protection action. This invention can effectively reject bad data, reducing malfunction probability, increasing the accuracy of protection. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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