CN106054092A - GIS partial discharge sensor sensitivity tester - Google Patents
GIS partial discharge sensor sensitivity tester Download PDFInfo
- Publication number
- CN106054092A CN106054092A CN201610348445.8A CN201610348445A CN106054092A CN 106054092 A CN106054092 A CN 106054092A CN 201610348445 A CN201610348445 A CN 201610348445A CN 106054092 A CN106054092 A CN 106054092A
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- Prior art keywords
- relay
- input
- chip microcomputer
- signal
- sensor
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
Abstract
The invention relates to a GIS partial discharge sensor sensitivity tester comprising a single chip microcomputer and a test signal input circuit. The single chip microcomputer comprises a digital-to-analog conversion module. The test signal input circuit comprises a DC booster circuit, a relay and a capacitor. The parallel port of the single chip microcomputer is connected with the coil of the relay. The input end of the DC booster circuit is connected with the output end of the digital-to-analog conversion module, a first output end is connected with a first end of the capacitor through the normally closed contact of the relay, and a second output end is connected with a second end of the capacitor. The first end of the capacitor is further connected with one end of an input resistor of a GIS through the normally open contact of the relay, and the second end of the capacitor is further connected with the other end of the input resistor. The sensitivity tester of the invention can send out partial discharge test signals of different cycles and amplitudes, and can be used to perform partial discharge test under remote control of a mobile terminal. The interference to partial discharge test is reduced, and the test efficiency is improved.
Description
Technical field
The present invention relates to GIS device technical field, particularly relate to a kind of GIS office and put the sensitivity test instrument of sensor.
Background technology
Partial discharge test has higher sensitivity.For new design and the high voltage electric equipment of manufacture, by local
Discharge measuring can find the weak link in insulation in time, prevents the use of the mistake in design and manufacturing process and material not
When, it is to differentiate product insulation or a kind of important method of equipment operational reliability, it can find that what pressure test cannot find sets
Standby defect.Shelf depreciation test is one of big event of current power equipment preventive trial.
At GIS (GAS INSULATED SWITCHGEAR, Cubicle Gas-Insulated Switchgear) apparatus local discharge
In test, when GIS device internal generation shelf depreciation, the sensor first having to be put tester by office receives, then is put survey by office
Examination instrument is analyzed and is processed.But the producer that tester sensor is put in current production office is numerous, and product is very different, Hen Duochuan
Sensor is because quality problems, and its sensitivity is the lowest, when GIS device uses this sensor to carry out office of acceptance's discharge signal, just may
Cause problems with:
1, when inside GIS device, generation office puts, this sensor is the lowest due to sensitivity, possibly this letter cannot be detected
Number；
2, the HFS during tester general test Partial discharge signal is put in GIS office, and high-frequency signal declines in communication process
Subtracting can be bigger, and when inside GIS device, generation office puts, sensor is probably due to installation position farther out, and can't detect this
Partial discharge signal.
The method of calibration of GIS device Partial discharge signal is as it is shown in figure 1, sensitivity test instrument is positioned at the CB in the middle of Fig. 1 at present
(inspection signal shown in position), and office puts the sensor drawn game of tester and puts tester and be placed at other CB, wherein CB represents peace
It is loaded on the sensor on GIS insulating basin.When sensitivity test instrument sends Partial discharge signal, just tester institute can be put by office
The feature surveying signal judges the transducer sensitivity situation of this point, and can put sensor according to the height office of selection of sensitivity
Installation interval, such as, transducer sensitivity height then installation interval can be larger.But owing to inspection signal decanting point drawn game is put
Relatively far apart, when using this kind of method, it is generally required to more than two people work simultaneously, a people bears the distance of the test point of tester
Blaming and inject inspection signal at middle CB, another person is responsible for observing the sensitivity of sensor in test point.Further, since inspection
Test signal decanting point drawn game put tester test point distance relatively far apart, test point be responsible for people need to sing by exhaling loudly
Or telephone contact just can know that the frequency and amplitude that signal occurs, and test is put in the phone office of may interfere with, and exhales loudly and sings
Return and walk about, reduce testing efficiency.
Summary of the invention
Based on this, it is necessary to for the problems referred to above, it is provided that the sensitivity test instrument of sensor is put in a kind of GIS office, it is possible to have
The interference in test process is put in effect reduction office, improves testing efficiency.
In order to achieve the above object, the technical scheme that the present invention takes is as follows:
The sensitivity test instrument of sensor is put in a kind of GIS office, including single-chip microcomputer and inspection signal input circuit, described monolithic
Machine includes that D/A converter module, described inspection signal input circuit include DC voltage booster circuit, relay and electric capacity；Described monolithic
The LPT of machine is connected with the coil of described relay；The input of described DC voltage booster circuit and described D/A converter module
Outfan is connected, and the first outfan is connected with the first end of described electric capacity by the normally closed contact of described relay, the second output
End is connected with the second end of described electric capacity；First end of described electric capacity is also by the normal opened contact of described relay and GIS device
Input resistance one end be connected, the second end is connected with the other end of described input resistance；
Described single-chip microcomputer receives synchronizing cycle and the signal amplitude that mobile terminal sends, according to generating square wave letter synchronizing cycle
Number, and described square-wave signal is input to the coil of described relay, according to signal amplitude and described direct current by LPT
The proportionality coefficient of booster circuit and described D/A converter module obtains the output voltage of D/A converter module, and passes through digital-to-analogue conversion
Described output voltage is input to described DC voltage booster circuit by module.
The sensitivity test instrument of sensor is put in GIS office of the present invention, uses the mode of mobile terminal remote control, it is only necessary to by this
Bright sensitivity test instrument is placed in signal decanting point, and tester holds the mobile terminal office of standing in puts tester side, so that it may
Adjust, in the way of by mobile terminal remote control, synchronizing cycle and the signal amplitude size that sensitivity test instrument is signaled, from
And judge that the sensitivity of sensor is put in office.The present invention, by mobile terminal input synchronizing cycle and signal amplitude, then sends
To single-chip microcomputer, tester can directly know synchronizing cycle and the signal amplitude of input, it is not necessary to sings or electricity by exhaling loudly
Words contact the frequency and amplitude that just can know that signal occurs, and the office of reducing puts interference during test, improves testing efficiency；Monolithic
After machine receives synchronizing cycle and signal amplitude, coordinate inspection signal input circuit generation office to put inspection signal, be automatically injected GIS
Equipment, so having only to a tester i.e. can complete the verification of Partial discharge signal, is greatly saved human cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of Partial discharge signal method of calibration in prior art；
Fig. 2 is the structural representation that the sensitivity test instrument embodiment one of sensor is put in GIS office of the present invention；
Fig. 3 is the structural representation that the sensitivity test instrument embodiment two of sensor is put in GIS office of the present invention.
Detailed description of the invention
By further illustrating the technological means and the effect of acquirement that the present invention taked, below in conjunction with the accompanying drawings and the most real
Execute example, to technical scheme, carry out clear and complete description.
As in figure 2 it is shown, the sensitivity test instrument of sensor is put in a kind of GIS office, including single-chip microcomputer and inspection signal input electricity
Road, described single-chip microcomputer includes that D/A converter module (D/A module), described inspection signal input circuit include DC voltage booster circuit
(DC-DC module), relay (J1) and electric capacity (C1)；The LPT (P mouth) of described single-chip microcomputer connects with the coil of described relay
Connect；The input of described DC voltage booster circuit (DC-DC module) is connected with the outfan of described D/A converter module (D/A module),
First outfan is connected with the first end of described electric capacity (C1) by the normally closed contact of described relay, and the second outfan is with described
Second end of electric capacity (C1) is connected；First end of described electric capacity (C1) is also by the normal opened contact of described relay and GIS device
Input resistance (RW) one end be connected, the second end is connected with the other end of described input resistance (RW).
Described single-chip microcomputer receives synchronizing cycle and the signal amplitude that mobile terminal sends, according to generating square wave letter synchronizing cycle
Number, and described square-wave signal is input to the coil of described relay by LPT (P mouth), according to signal amplitude and described
DC voltage booster circuit (DC-DC module) obtains D/A converter module with the proportionality coefficient of described D/A converter module (D/A module)
The output voltage of (D/A module), and by D/A converter module (D/A module), described output voltage is input to described DC boosting
Circuit (DC-DC module).
D/A converter module, DC voltage booster circuit and single-chip microcomputer all can use the existing device of prior art to realize,
Such as single-chip microcomputer can use MSP430 etc..The input resistance RW of GIS device typically replaces with natural impedance, about tens ohm.
As in figure 2 it is shown, described inspection signal input circuit can also include being connected to described DC voltage booster circuit (DC-DC
Module) the first outfan and the normally closed contact of described relay between resistance (R1).
As it is shown on figure 3, communicate to set up with mobile terminal, receive synchronizing cycle and signal width that mobile terminal sends
Value, sensitivity test instrument of the present invention can also include UART (Universal Asynchronous Receiver/
Transmitter, universal asynchronous receiving-transmitting transmitter) turn bluetooth or UART turns WIFI (WIreless-Fidelity, wireless network)
Module, described UART turns bluetooth or described UART turns WIFI module and is connected with the UART interface of described single-chip microcomputer.UART turns blue
Tooth and UART turn WIFI module and existing module in prior art all can be used to realize.The present invention can also use other wireless
Communication module is set up with mobile terminal and is communicated, and this is not made restriction by the present invention.
In one embodiment, described relay can use dry-reed relay, it would however also be possible to employ other relay.Institute
State mobile terminal and include smart mobile phone and Intelligent flat etc..
Realize principle in order to be more fully understood that sensitivity test instrument of the present invention, describe in detail below in conjunction with Fig. 3.
The sensitivity test instrument of the present invention is placed in inspection signal decanting point position as shown in Figure 1, and single-chip microcomputer is by interior
Put the external UART of UART interface and turn bluetooth and UART turns WIFI module access network, it is achieved mobile terminal and single-chip microcomputer wireless
Communication.
Tester holds mobile terminal and stands in office as shown in Figure 1 and put tester side, in the terminal input with
Step period and signal amplitude, synchronizing cycle and signal amplitude are transferred to single-chip microcomputer by network.The synchronizing cycle of input and signal
Amplitude can adjust according to actual needs, and the signal amplitude adjustable extent of voltage is big, even if also Inspection Bureau can put survey at a distance
Examination instrument sensitivity, brings conveniently to verifying work, it addition, the cycle is adjustable, the office of simulation can put the synchronizing cycle of generation, with reality
Border shelf depreciation situation closer to.
After single-chip microcomputer receives synchronizing cycle and signal amplitude, generate square-wave signal according to synchronizing cycle, by square-wave signal
Exported to the coil of relay by P mouth, determine the output voltage of D/A module according to signal amplitude, sent by D/A module described
Output voltage.
In one embodiment, described single-chip microcomputer can generate square-wave signal, wherein residing square wave letter by delay procedure
Number cycle be described synchronizing cycle.Such as, determine and at a time export high level by P mouth, then export low electricity by P mouth
The flat moment is the time plus described synchronizing cycle in the moment of output high level, and the time again exporting high level is that last time is defeated
Go out the time plus the described synchronizing cycle low level time, the like, it is possible to the cycle of obtaining is described synchronizing cycle
Square-wave signal.Delay procedure can also use other delay procedure existing to realize.
Owing to described synchronizing cycle can be adjusted, so sensitivity check instrument of the present invention the office of realization can put inspection letter
Number synchronizing cycle adjustable function.
In one embodiment, described single-chip microcomputer obtains digital-to-analogue according to the ratio of described signal amplitude with described proportionality coefficient
The output voltage of modular converter.Such as, the D/A module of single-chip microcomputer can send the d. c. voltage signal of 0-3V (volt), passes through DC-
DC module, corresponding to the DC voltage of 0-100V, is then assured that DC-DC module relative to the proportionality coefficient of D/A module is
100V/3V, the signal amplitude that single-chip microcomputer receives is signal source voltage, namely DC-DC module needs the voltage of output, so needing
To determine that D/A module needs the voltage of output according to proportionality coefficient and signal amplitude, it is assumed that signal amplitude is 50V, proportionality coefficient
Be 100/3, then D/A module needs the voltage of output to be 1.5 volts, and the voltage of 1.5 volts is input to by single-chip microcomputer by D/A module
DC-DC module, it is possible to obtain the voltage of 50V.
Owing to signal amplitude can be adjusted, so sensitivity check instrument of the present invention the office of realization can put inspection signal width
It is worth adjustable function.
By checking signal input circuit that signal source (DC-DC module) is modeled to the letter that the internal office of a kind of GIS of approximation puts
Number.Within each synchronizing cycle, when the square-wave signal of the coil of described relay input is low level, described relay normally closed
Junction closure, normal opened contact disconnects, and described DC voltage booster circuit passes through described resistance (R1) by the voltage liter of described electric capacity (C1)
To described signal amplitude；When the square-wave signal of the coil input of described relay is high level, the normally closed contact of described relay
Disconnecting, normal opened contact closes, and inspection signal is put by described electric capacity (C1) in described input resistance (RW) injection office.
The present invention adjusts the office that sensitivity test instrument sent by the way of mobile terminal remote control and puts inspection signal
Synchronizing cycle and the size of signal amplitude, thus judge the sensitivity of partial discharge detection sensor, and can be according to the height of sensitivity
Office is selected to put the installation interval of sensor.When the present invention and prior art are compared to each other, possess advantages below:
1, the present invention is by mobile terminal input synchronizing cycle and signal amplitude, is then sent to single-chip microcomputer, tester
Can directly know synchronizing cycle and the signal amplitude of input, it is not necessary to sing or telephone contact just can know that signal by exhaling loudly
The frequency occurred and amplitude, the office of reducing puts interference during test, improves testing efficiency；
2, after the single-chip microcomputer of the present invention receives synchronizing cycle and signal amplitude, inspection signal input circuit generation office is coordinated
Put inspection signal, be automatically injected GIS device, so having only to a tester i.e. can complete the verification of Partial discharge signal, greatly
Save greatly human cost.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic executed in example is all described, but, as long as the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that, come for those of ordinary skill in the art
Saying, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. the sensitivity test instrument of sensor is put in a GIS office, it is characterised in that include single-chip microcomputer and inspection signal input electricity
Road, described single-chip microcomputer includes that D/A converter module, described inspection signal input circuit include DC voltage booster circuit, relay and electricity
Hold；The LPT of described single-chip microcomputer is connected with the coil of described relay；The input of described DC voltage booster circuit and described number
The outfan of mould modular converter is connected, and the first outfan is by the first end phase of the normally closed contact of described relay with described electric capacity
Even, the second outfan is connected with the second end of described electric capacity；First end of described electric capacity connects also by the normally opened of described relay
Point is connected with one end of the input resistance of GIS device, and the second end is connected with the other end of described input resistance；
Described single-chip microcomputer receives synchronizing cycle and the signal amplitude that mobile terminal sends, and generates square-wave signal according to synchronizing cycle,
And described square-wave signal is input to the coil of described relay, according to signal amplitude and described DC boosting by LPT
The proportionality coefficient of circuit and described D/A converter module obtains the output voltage of D/A converter module, and passes through D/A converter module
Described output voltage is input to described DC voltage booster circuit.
The sensitivity test instrument of sensor is put in GIS office the most according to claim 1, it is characterised in that described inspection signal
Input circuit also includes being connected between the first outfan of described DC voltage booster circuit and the normally closed contact of described relay
Resistance.
The sensitivity test instrument of sensor is put in GIS office the most according to claim 2, it is characterised in that described relay
When the square-wave signal of coil input is low level, the normally closed contact Guan Bi of described relay, normal opened contact disconnects, described direct current liter
The voltage of described electric capacity is risen to described signal amplitude by described resistance by volt circuit；The square wave of the coil input of described relay
When signal is high level, the normally closed contact of described relay disconnects, and normal opened contact closes, and described input resistance is noted by described electric capacity
Incoming puts inspection signal.
The sensitivity test instrument of sensor is put in GIS office the most according to claim 1, it is characterised in that also include that UART turns
Bluetooth or UART turn WIFI module, and described UART turns bluetooth or described UART turns the UART of WIFI module and described single-chip microcomputer
Interface connects.
The sensitivity test instrument of sensor is put in GIS office the most according to claim 1, it is characterised in that described single-chip microcomputer leads to
Crossing delay procedure and generate square-wave signal, wherein the cycle of residing square-wave signal is described synchronizing cycle.
The sensitivity test instrument of sensor is put in GIS office the most according to claim 1, it is characterised in that described single-chip microcomputer root
The output voltage of D/A converter module is obtained according to the ratio of described signal amplitude with described proportionality coefficient.
The sensitivity test instrument of sensor is put in GIS office the most according to claim 1, it is characterised in that described relay bag
Include dry-reed relay.
8. put the sensitivity test instrument of sensor according to the GIS office described in claim 1 to 7 any one, it is characterised in that institute
State mobile terminal and include smart mobile phone and Intelligent flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610348445.8A CN106054092A (en) | 2016-05-23 | 2016-05-23 | GIS partial discharge sensor sensitivity tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610348445.8A CN106054092A (en) | 2016-05-23 | 2016-05-23 | GIS partial discharge sensor sensitivity tester |
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| CN106054092A true CN106054092A (en) | 2016-10-26 |
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| CN201610348445.8A Pending CN106054092A (en) | 2016-05-23 | 2016-05-23 | GIS partial discharge sensor sensitivity tester |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561468A (en) * | 2017-06-27 | 2018-01-09 | 广东电网有限责任公司佛山供电局 | A kind of superfrequency partial enlargement signal generator |
| CN109510624A (en) * | 2018-10-22 | 2019-03-22 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of airborne equipment high voltage digital-to-analogue conversion and verifying attachment |
| CN109541414A (en) * | 2018-12-24 | 2019-03-29 | 南京海曼网络科技有限公司 | A kind of site assessment system of partial discharge sensor |
| CN110554343A (en) * | 2018-05-31 | 2019-12-10 | 广东电网有限责任公司 | Ultrahigh frequency partial discharge signal simulation device |
| CN113405586A (en) * | 2021-06-15 | 2021-09-17 | 重庆信息通信研究院 | Method for testing sensing sensitivity of terminal based on Internet of things |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107561468A (en) * | 2017-06-27 | 2018-01-09 | 广东电网有限责任公司佛山供电局 | A kind of superfrequency partial enlargement signal generator |
| CN110554343A (en) * | 2018-05-31 | 2019-12-10 | 广东电网有限责任公司 | Ultrahigh frequency partial discharge signal simulation device |
| CN109510624A (en) * | 2018-10-22 | 2019-03-22 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of airborne equipment high voltage digital-to-analogue conversion and verifying attachment |
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| CN113405586A (en) * | 2021-06-15 | 2021-09-17 | 重庆信息通信研究院 | Method for testing sensing sensitivity of terminal based on Internet of things |
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Application publication date: 20161026 |