GIS (Geographic Information System) fault diagnosis system and method based on vibration signal spectrum analysis

A fault diagnosis system and vibration signal technology, applied in the field of GIS fault monitoring, can solve problems such as the inability of ultra-high frequency sensors to suppress interference, the impact on the accuracy of detection results, and inconvenient installation on site, and achieve simple composition and structure, obvious features, and easy The effect of engineering realization
CN102735968AActive Publication Date: 2012-10-17JIANGSU ELECTRIC POWER CO +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIANGSU ELECTRIC POWER CO
Publication Date
2012-10-17

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Abstract

The invention discloses a GIS (Geographic Information System) fault diagnosis system and method based on vibration signal spectrum analysis, belonging to the field of GIS fault monitoring. The system comprises a vibration acceleration sensor, a charge amplifier, a data acquisition instrument and a PC (Personal Computer) all of which are successively connected together in series, wherein the vibration acceleration sensor comprises three vibration sensors which are fixed on the outer surface of a GIS box in the X-axis, Y-axis and Z-axis directions, respectively. The diagnosis method of the system comprises the following steps of: acquiring GIS vibration signals in the X-axis, Y-axis and Z-axis directions by means of the three vibration sensors; performing wavelet de-noising on the vibration signals intercepted by a full period and then performing spectrum analysis; calculating energy at 50 Hz and the sum of energy at 100 Hz, energy at 200 Hz and energy at 300 Hz respectively; comparing the calculated values with the normal state; and determining the GIS fault according to the result of comparison in combination with a threshold. The method is easy in engineering realization, obvious in feature and capable of effectively diagnosing the GIS fault.
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Description

technical field

[0001] The invention relates to an on-line monitoring technology for the state of power transmission and transformation equipment, in particular to a fault diagnosis system and method for a gas-insulated metal-enclosed switchgear (GIS), which belongs to the field of GIS fault monitoring. Background technique

[0002] Gas-insulated metal-enclosed switchgear (GIS) was born in the early 1970s. It is a combination of electrical components such as circuit breakers, disconnectors, fast earthing switches, current transformers, lightning arresters, busbars, bushings, and cable terminals. In the metal shell, the interior is filled with 0.3~0.4MPa SF6 gas as the insulating medium.

[0003] The role of GIS is equivalent to a switch station, which has the advantages of small size, small footprint, high operational reliability, no influence from external environment, flexible configuration, small maintenance workload, long maintenance cycle, and no electromagnetic interfe...

Claims

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