CN206132920U - Cubical switchboard monitoring devices that discharges - Google Patents
Cubical switchboard monitoring devices that discharges Download PDFInfo
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- CN206132920U CN206132920U CN201621177626.0U CN201621177626U CN206132920U CN 206132920 U CN206132920 U CN 206132920U CN 201621177626 U CN201621177626 U CN 201621177626U CN 206132920 U CN206132920 U CN 206132920U
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Abstract
The utility model relates to a monitoring technology field of discharging provides a cubical switchboard monitoring devices that discharges, including setting up antenna sensor, preamble signal treatment circuit, the industrial computer in the cubical switchboard, the preamble signal treatment circuit includes wave filter, amplifier, connect before the wave filter the antenna sensor connects after the amplifier, the industrial computer includes data acquisition unit, data processor, data memory, connect before the data acquisition unit the amplifier connects after data processor connects after data memory, the beneficial effects of the utility model are that: through setting up wave filter, amplifier, solved the inside partial discharge signal of cubical switchboard and turned back in the cubical switchboard many times and penetrate decay and the serious problem of electromagnetic interference, manual or the automatic acquisition mode of optional is gathered the partial discharge signal is automatic, realizes on -line monitoring, signal to after handling is saved, be convenient for later stage aassessment, analysis, simple structure, reliable, reasonable, market perspective is wide.
Description
Technical field
This utility model is related to monitoring technical field of discharging, more particularly to a kind of switch cubicle discharge monitoring device.
Background technology
Inside switch cabinet narrow space, part are various, complex structure, and insulation distance is little, therefore than other power equipments more
Easily there is insulation defect, such as bubble gap, impurity, spine etc.；Under forceful electric power field action, the Electric Field Distribution of apparatus insulated inside
It is uneven, increase in the electric field intensity of rejected region, the electric discharge for not running through whole insulation occurs so as to be easily caused the position, i.e.,
Shelf depreciation.Shelf depreciation will not typically cause the penetrance of insulation to puncture, but can but cause the local damage of dielectric.
The destruction of seal electrical strength if its long-term existence, can be caused under certain condition, ultimately cause apparatus insulated puncturing.
For switch cubicle, it is to cause its insulation ag(e)ing or deterioration even to be damaged that its internal electric equipment occurs partial discharge phenomenon
One of bad major reason so as to cause equipment damage and power system accident, while shelf depreciation is also apparatus insulated integrity
The mark of degeneration.
Therefore the shelf depreciation of switch cubicle electrical equipment is carried out monitoring on-line be assessment equipment insulation status important handss
Section, and discovering device Hidden fault, finally realize fault pre-alarming, it is to avoid one of effective measures that failure occurs.
Traditional detection method for local discharge, the frequency of its detection signal are usually no more than 1MHz, and scene local is put
Electrical testing is particularly on-line checking, usually can be affected by various electromagnetic interference；When interference signal is had with local discharge signal
When having same or like feature, measured signal is often disturbed to be flooded.
Antenna sensor is also able to detect that signal on the premise of filtering and amplifying circuit is not added with, but in practice,
Local discharge signal inside high-tension switch cabinet is generally fainter, above inside switch cabinet electromagnetic propagation characteristic is ground in addition
Study carefully and can obtain, the communication process of the local discharge signal of inside switch cabinet in switch cubicle can produce multiple catadioptric, signal attenuation
Seriously.
Utility model content
The purpose of this utility model is exactly to overcome the deficiencies in the prior art, there is provided a kind of switch cubicle discharge monitoring device.
A kind of switch cubicle discharge monitoring device of this utility model, including the antenna sensor being arranged in the switch cubicle,
Advance signal process circuit, industrial computer；
The advance signal process circuit includes wave filter, amplifier；The wave filter is two-stage filter；The filtering
The antenna sensor is connect before device, the amplifier is followed by；
The industrial computer includes data acquisition unit, data processor, data storage；Connect before the data acquisition unit
The amplifier, is followed by the data processor, and the data processor is followed by the data storage.
Further, the antenna sensor is arranged on ultra-high frequency antenna, and the ultra-high frequency antenna is arranged at switch cubicle
Interior, the ultra-high frequency antenna working frequency range is 500MHz-1500MHz；Passband signal to noise ratio is less than or equal to 2.5；Directivity is not less than
170 degree.
Further, the data acquisition unit is also connected by coaxial cable for high frequency with the power-frequency voltage Acquisition Circuit
Connect.
Further, the antenna sensor is connected by coaxial cable for high frequency with the wave filter.
Further, the data acquisition unit is the high-speed data acquisition card based on pci bus, the data collecting card
The PCI slot of the industrial computer can be inserted directly into.
Further, the sample rate of the data collecting card is more than 1GS/s, with 2 kinds of sides of digital triggering and simulation triggering
Formula.
Further, the frequency band of the wave filter is 500MHz-1500MHz.
Further, the data storage is the hard disk of the industrial computer.
The beneficial effects of the utility model are：By arranging wave filter, amplifier, the signal that antenna sensor is received is entered
Row pretreatment, solves inside switch cabinet local discharge signal and repeatedly turns back in communication process in switch cubicle and penetrate, signal attenuation
And the problem that electromagnetic interference is serious；Collection and automatic data collection pattern manually can be selected, under automatic data collection pattern, can be to switch
Local discharge signal in cabinet is acquired automatically, realizes on-line monitoring；Signal to collection, after processing is stored, and is easy to
Later stage assessment of failure, analysis；This apparatus structure is simple, reliable, reasonable, and market application foreground is wide.
Description of the drawings
Fig. 1 show a kind of switch cubicle discharge monitoring device structural representation of this utility model embodiment.
Wherein：1- switch cubicles, 2- antenna sensors, 3- advance signal process circuits, 4- industrial computers, the collection of 5- power-frequency voltages
Circuit, 31- wave filter, 32- amplifiers, 41- data acquisition units, 42- data processors, 43- data storages.
Specific embodiment
This utility model specific embodiment is described in detail below in conjunction with concrete accompanying drawing.It should be noted that following enforcements
Example described in technical characteristic or technical characteristic combination be not construed as it is isolated, they can be mutually combined from
And reach superior technique effect.In the accompanying drawing of following embodiments, it is special that the identical label that each accompanying drawing occurs represents identical
Levy or part, can be applicable in different embodiments.
A kind of switch cubicle discharge monitoring device of this utility model, including the antenna sensor 2 being arranged in the switch cubicle,
Advance signal process circuit 3, industrial computer 4；
The advance signal process circuit 3 includes wave filter 31, amplifier 32；The wave filter 31 is two-stage filter；
The antenna sensor 2 is connect before the wave filter 31, the amplifier 32 is followed by；
The industrial computer 4 includes data acquisition unit 41, data processor 42, data storage 43；The data acquisition
The amplifier 32 is connect before unit 41, the data processor 42 is followed by, the data processor 42 is followed by the data storage
Device 43.
The antenna sensor 2 is arranged on ultra-high frequency antenna, and the ultra-high frequency antenna is arranged in switch cubicle 1, described
Ultra-high frequency antenna working frequency range is 500MHz-1500MHz；Passband signal to noise ratio is less than or equal to 2.5；Directivity is not less than 170 degree.
The data acquisition unit 41 is also connected by coaxial cable for high frequency with the power-frequency voltage Acquisition Circuit 5.
The antenna sensor 2 is connected by coaxial cable for high frequency with the wave filter 31.
The data acquisition unit 41 is the high-speed data acquisition card based on pci bus, and the data collecting card can be direct
Insert the PCI slot of the industrial computer 4.
The sample rate of the data collecting card is more than 1GS/s, with digital triggering and simulation 2 kinds of modes of triggering.
The frequency band of the wave filter 31 is 500MHz-1500MHz.
Hard disk of the data storage 43 for the industrial computer.
This utility model embodiment is connect to local discharge signal by the ultra-high frequency antenna in switch cubicle 1
Receive, advance signal process circuit 3 is sent to by coaxial cable for high frequency, after being filtered denoising, enter amplifier 32, then will
The Discharge Simulation signal input data acquisition unit 41 for processing, enters data processor 42, data processing through analog digital conversion
42 pairs of signals for collecting of device are identified, and finally preserve to data storage 43.
Antenna sensor 2 is also able to detect that signal on the premise of amplifier 32, wave filter 31 is not added with, but in actual fortune
With in, the local discharge signal inside switch cubicle 1 is generally fainter, and the local discharge signal inside switch cubicle 1 is being opened in addition
The communication process closed in cabinet 1 can produce multiple catadioptric, and signal attenuation is serious；Meanwhile, 1 Partial Discharge Detection of switch cubicle scene bar
Part is complicated, and interference source is more, and interference strength is big, and more interference signal is often there is also inside its cabinet.And pass from antenna
Sensor 2 sets out, although its frequency band can suppress to interference signal, but its loss on non-frequency band be not level off to it is infinite
Greatly, that is to say, that when the energy of interference signal is larger, antenna still can be coupled to electromagnetic interference signal.Based on this, adopt and put
Big device 32, the advance signal process circuit 3 of the composition of wave filter 31 carry out pretreatment to the signal that antenna sensor 2 is received, to increase
Plus the detection sensitivity of signal to noise ratio and raising shelf depreciation, using two-stage filter 31, filter effect is imitated compared with general filter
Fruit is more preferably.
In view of the ultra-high-frequency detection of shelf depreciation in switch cubicle 1 frequency band in 300MHz～3GHz, but due to its electric discharge
Energy is concentrated mainly on low-frequency range, and, in more than 1GHz, local discharge signal energy is very little for frequency, so wave filter
31 frequency band elects 500MHz-1500MHz as.
Local discharge superhigh frequency signal after ultra-high frequency antenna reception, then through the filtering of advance signal process circuit 3
Processing and amplifying, enters into data acquisition unit 41, and the part carries out analog digital conversion to pretreated signal, then by digital signal
Next unit is delivered to, for whole monitoring device, the accuracy of the performance direct relation whole system monitoring of the unit.
According to nyquist sampling law, the sample rate of 41 minimum of data acquisition unit is necessary for the maximum frequency of collected signal
The twice of rate, is just unlikely to frequency of occurrences aliasing.Therefore the sample rate of this device data acquisition unit 41 at least will be
More than 1GS/s, could effectively be gathered to 1 ultra-high frequency signal of switch cubicle.
Preferably, data acquisition unit 1 adopts high-speed data acquisition card, using PCI bus modes, selects this kind of bus
The reason for mode, is because that being stuck in the aspects such as performance, motility and ease for use based on the data acquisition of PCI buses has definitely
Advantage, and its board is card insert type, with industrial computer 4 plug-in card identical size, can directly by board insertion industrial computer 4
PCI slots can be used, and system architecture is simple, convenient, can also make full use of the resource of industrial computer 4 realize data acquisition and
The intelligent monitorings such as process, fault analysis and diagnosis and process control.Relative to the data acquisition equipment based on other buses, its price
Advantage can effectively reduce system cost.
The data collecting card has the two ways of digital triggering and simulation triggering, so by the power frequency electric of switch cubicle 1
Pressure signal converts the external analog signal triggering port for accessing the capture card through square wave so that the data collecting card can be in work
Local discharge signal in the frequency cycle to being input into is acquired.
The sample mode of the data collecting card is instantaneous sampling, and this kind of sample mode causes the local discharge signal for measuring
Can have discharge phase information, and each sampling channel is respectively provided with independent sample circuit and analog to digital conversion circuit, with compared with
High accuracy.
The analog bandwidth of the data collecting card is 1GHz, as the frequency band of the antenna sensor 2 of the system utilization exists
Below 1GHz, therefore the analog bandwidth of 1GHz disclosure satisfy that the band requirement of accurate measurement, it is to avoid because bandwidth crosses arrowband
Situations such as loss of next signal amplitude and phase signal.
Preferably, the digit of the analog-digital converter of the data collecting card be 8, due to the digit of analog-digital converter it is straight
The precision for determining transducer is connect, the system is that local discharge signal is measured, and the voltage magnitude of local discharge signal is big
Many is all below 1V, and so the capture card corresponds to minimum resolution for 1V/28, i.e. about 4mV, and the precision disclosure satisfy that essence
Degree is required.
The beneficial effects of the utility model are：By arranging wave filter, amplifier, the signal that antenna sensor is received is entered
Row pretreatment, solves inside switch cabinet local discharge signal and repeatedly turns back in communication process in switch cubicle and penetrate, signal attenuation
And the problem that electromagnetic interference is serious；Collection and automatic data collection pattern manually can be selected, under automatic data collection pattern, can be to switch
Local discharge signal in cabinet is acquired automatically, realizes on-line monitoring；Signal to collection, after processing is stored, and is easy to
Later stage assessment of failure, analysis；This apparatus structure is simple, reliable, reasonable, and market application foreground is wide.
Although having been presented for several embodiments of the present utility model herein, those skilled in the art should manage
Solution, in the case of without departing from this utility model spirit, can be changed to the embodiments herein.Above-described embodiment simply shows
Example property, should not be using the embodiments herein as the restriction of this utility model interest field.
Claims (8)
1. a kind of switch cubicle discharge monitoring device, it is characterised in that including the antenna sensor being arranged in the switch cubicle, front
Put signal processing circuit, industrial computer；
The advance signal process circuit includes wave filter, amplifier；The wave filter is two-stage filter；Before the wave filter
The antenna sensor is connect, the amplifier is followed by；
The industrial computer includes data acquisition unit, data processor, data storage；Connect described before the data acquisition unit
Amplifier, is followed by the data processor, and the data processor is followed by the data storage.
2. switch cubicle discharge monitoring device as claimed in claim 1, it is characterised in that the antenna sensor is arranged at superelevation
On frequency antenna, the ultra-high frequency antenna is arranged in switch cubicle, and the ultra-high frequency antenna working frequency range is 500MHz-1500MHz；
Passband signal to noise ratio is less than or equal to 2.5；Directivity is not less than 170 degree.
3. switch cubicle discharge monitoring device as claimed in claim 1, it is characterised in that the data acquisition unit also with it is described
Power-frequency voltage Acquisition Circuit is connected by coaxial cable for high frequency.
4. switch cubicle discharge monitoring device as claimed in claim 1, it is characterised in that the antenna sensor and the filtering
Device is connected by coaxial cable for high frequency.
5. the switch cubicle discharge monitoring device as described in any one of claim 1-4, it is characterised in that the data acquisition unit
It is the high-speed data acquisition card based on pci bus, the data collecting card can be inserted directly into the PCI slot of the industrial computer.
6. switch cubicle discharge monitoring device as claimed in claim 5, it is characterised in that the sample rate of the data collecting card is big
In 1GS/s, with digital triggering and simulation 2 kinds of modes of triggering.
7. switch cubicle discharge monitoring device as claimed in claim 1, it is characterised in that the frequency band of the wave filter is
500MHz-1500MHz。
8. switch cubicle discharge monitoring device as claimed in claim 1, it is characterised in that the data storage is the industry control
The hard disk of machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621177626.0U CN206132920U (en) | 2016-11-03 | 2016-11-03 | Cubical switchboard monitoring devices that discharges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621177626.0U CN206132920U (en) | 2016-11-03 | 2016-11-03 | Cubical switchboard monitoring devices that discharges |
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| Publication Number | Publication Date |
|---|---|
| CN206132920U true CN206132920U (en) | 2017-04-26 |
Family
ID=58577422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621177626.0U Active CN206132920U (en) | 2016-11-03 | 2016-11-03 | Cubical switchboard monitoring devices that discharges |
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| CN (1) | CN206132920U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095716A (en) * | 2019-05-21 | 2019-08-06 | 国网山西省电力公司电力科学研究院 | High-voltage switch gear characteristic non-contact testing system and test method based on radiofrequency signal feature |
-
2016
- 2016-11-03 CN CN201621177626.0U patent/CN206132920U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095716A (en) * | 2019-05-21 | 2019-08-06 | 国网山西省电力公司电力科学研究院 | High-voltage switch gear characteristic non-contact testing system and test method based on radiofrequency signal feature |
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