Method and device for identifying faults of ground capacitor of generator terminal circuit breaker
A machine-end circuit breaker and fault identification technology, which is applied in the direction of measuring devices, instruments, and measuring electronics, can solve the problems of long time consumption and wide search range, and achieve the effect of reducing the scope of troubleshooting and improving the efficiency of troubleshooting
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0032] The fault identification method of the ground capacitor of the generator machine end circuit breaker, including:
[0033] S1, collecting the voltage on the stator side of the generator terminal;
[0034] S2, according to the voltage collection results of S1, set the phase with the lowest voltage to ground as the fault phase, and calculate the fault phase to ground voltage, stator side voltage, generator stator to ground zero-sequence voltage, and the electromotive force of the fault phase;
[0035] S3, set the phase difference threshold range; according to the calculation results of S2, compare the phase relationship between the fault phase electromotive force and the stator-to-ground zero-sequence voltage: if the phase difference of the fault-phase electromotive force ahead of the stator-to-ground zero-sequence voltage is within the phase difference threshold range , it is judged that the ground capacitor of the machine-side circuit breaker is faulty, otherwise it is a...
Embodiment 2
[0043] Different from Embodiment 1, in S2 of this embodiment, the zero-sequence voltage of the generator stator to ground is the zero-sequence voltage generated by the generator terminal PT.
[0044] Generator terminal PT self-generated zero-sequence voltage for;
[0045]
[0046] in, is the phase-to-ground voltage of generator terminal A, is the phase-to-ground voltage of generator terminal B, It is the phase-to-ground voltage of generator terminal C.
[0047] References for the judgment and identification basis of Embodiment 1 and Embodiment 2 figure 1 . Stator ground zero sequence voltage Located on the horizontal axis, when the generator stator is single-phase grounded and the primary winding of the machine terminal PT is short-circuited, the fault phase electromotive force is located in the third quadrant, that is, the phase difference between the fault phase electromotive force and the stator-to-ground zero-sequence voltage is 180-270 degrees ; When the gr...
Embodiment 3
[0049] The fault identification device for the ground capacitor of the generator machine end circuit breaker, including:
[0050] The sampling module collects the voltage on the stator side of the generator terminal;
[0051] The calculation module, according to the voltage collection results of the stator side of the generator terminal, sets the phase with the lowest voltage to ground as the fault phase, and calculates the fault phase to ground voltage, the voltage on the stator side, the zero-sequence voltage of the generator stator to ground, and the electromotive force of the fault phase;
[0052]The fault identification module sets the phase difference threshold range; according to the calculation result of S2, compares the phase relationship between the fault phase electromotive force and the stator-to-ground zero-sequence voltage: if the fault phase electromotive force leads the phase difference of the stator-to-ground zero-sequence voltage within the phase difference th...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com