On-line monitoring and diagnostics of gas circuit breakers

Goto, Kenta; Sakakibara, T.; Kamata, I.; Ikeda, S.

doi:10.1109/61.19227

Cited by 31 publications

(6 citation statements)

References 9 publications

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“…A known method of detection of the partial discharge consists in using grounding electrodes embedded on the grounding side of the insulating spacers as the internal electrodes and measurement terminals attached to each insulating spacer [4]. By injecting simulated partial discharge pulses through these terminals, it is possible to conduct various tests to examine the partial discharge pulse propagation in operating gas insulated stations.…”

Section: Examination Of Pulse Injection Methodsmentioning

confidence: 99%

“…21. Electrodes embedded in the grounding side flange of insulating spacers were used as detecting electrodes [4]. The signal of the partial discharge generated inside the GIS tank and the signal of the main circuit ac voltage are applied to the E/O converter (detector) by a double shielded coaxial cable, where they are separated into a partial discharge signal and a phase pulse corresponding to the zero-cross point of the waveform of the main circuit voltage, after which they are converted (E/O conversion) into optical signals and sent to a receiver board.…”

Section: Verification Of the System Of Partial Discharge Locationmentioning

confidence: 99%

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Development of an on-line partial discharge monitoring system for gas insulated substations

et al. 1999

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This paper describes the results of tests and discussions carried out to develop a system for partial discharge monitoring in GIS. They include the propagation characteristics of partial discharge pulses in each GIS component, as well as the test results obtained using an actual 300‐kV GIS. We also report the results of verification test on the GIS partial discharge monitoring and location system developed by the authors. © 1999 Scripta Technica, Electr Eng Jpn, 129(2): 40–50, 1999

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Section: Examination Of Pulse Injection Methodsmentioning

confidence: 99%

Section: Verification Of the System Of Partial Discharge Locationmentioning

confidence: 99%

Development of an on-line partial discharge monitoring system for gas insulated substations

et al. 1999

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“…The current I B on point B can reflect supply voltage, the current I C on point C can reflect coil resistance, and the current I D on point D can reflect the speed of movable iron-core. The current on these three points can be used as reference for action analysis [8]- [10]. Moreover, defines T 1 =|t 1 -t 0 |, T 2 =|t 2 -t 1 |, T 3 =|t 3 -t 2 |, T 4 =|t 4 -t 3 |.…”

Section: The Application In Hv Circuit Breaker Fault Diagnosismentioning

confidence: 99%

Research on high-speed fuzzy reasoning with CPLD for fault diagnosis expert system

Xue

Sun

Qiao

et al. 2009

2009 9th International Conference on Electronic Measurement &Amp; Instruments

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As an effective method for diagnosis reasoning, fuzzy reasoning is hard to meet the real-time challenge for its complex process and time-consuming. According to the principle of conventional fuzzy reasoning with software, a new method to design expert system fuzzy reasoning with CPLD for fault diagnosis is presented. In the new method, fuzzy operating is realized by function transform with ROM, and CPLD provides logic control and process coordination for fuzzy reasoning. After all, the whole fuzzy reasoning is finished with hardware, not software. It is validated by many experiments that the speed of fuzzy reasoning with this method is faster than traditional modes, and it can be applicable to many on-line diagnosis systems based on single-chip controller or DSP (Digital Signal Processor).

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“…Currently, the research about online monitoring of the switchgear is primarily interested in the electrical endurance and mechanical characteristics of high-voltage breaker contact. There are a lot of new ways like acoustic diagnosis and non-invasive diagnostic [3] [4] . In China, some instruments have been developed the instrument to monitor the operation state of high-voltage breaker, but them need to be made better [5] .…”

Section: Introductionmentioning

confidence: 99%

Optimization for the Online Assessment of Real-time Switch Resistance in Switching Stations

Liu¹,

Bu²,

Li³

et al. 2014

Proceedings of the 2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

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Abstract-It's important to access the status change of switchgear in switching station for condition maintenance. With regard to the online assessment for the resistance of switches in the switching station with 3/2 connection mode, linear equations can be established on the basis of real-time current measurements. The accuracy of the solution for these linear equations will make a great difference to the whole assessment because of errors in real measurements. To make the calculation for the value of the resistance more accurate, some equations are selected in this paper by comparing matrix condition number. The size of this number reflects the degree of the linear correlation of the equations: the smaller the matrix condition number is, the less influence the variation of coefficient matrix will have on the solution of the equations. Therefore, the condition numbers of all the combinations of coefficient matrixes corresponding to real-time operating conditions should be calculated and the combination with minimum condition number should be selected. In this paper, simulation studies on the current data obtained from 500kV switchgear are carried out to verify the effectiveness of the proposed method.

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On-line monitoring and diagnostics of gas circuit breakers

Cited by 31 publications

References 9 publications

Development of an on-line partial discharge monitoring system for gas insulated substations

Development of an on-line partial discharge monitoring system for gas insulated substations

Research on high-speed fuzzy reasoning with CPLD for fault diagnosis expert system

Optimization for the Online Assessment of Real-time Switch Resistance in Switching Stations

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