CN208569014U - A kind of Partial discharge signal marking apparatus of pressure-adjustable - Google Patents
A kind of Partial discharge signal marking apparatus of pressure-adjustable Download PDFInfo
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- CN208569014U CN208569014U CN201820835861.5U CN201820835861U CN208569014U CN 208569014 U CN208569014 U CN 208569014U CN 201820835861 U CN201820835861 U CN 201820835861U CN 208569014 U CN208569014 U CN 208569014U
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Abstract
The utility model discloses a kind of Partial discharge signal marking apparatus of pressure-adjustable, including micro-chip processor, signal generator, drive amplification circuit, controlled voltage source, charging resistor, discharge resistance, the first relay, the second relay, capacitor.Utility model works process: square-wave signal is exported by micro-chip processor control signal generator, the first relay is controlled by square-wave signal and the second relay is cut-off, since the work-based logic of the first relay and the second relay is opposite, therefore when the first relay is closed, when second relay disconnects, micro-chip processor control controlled voltage source is charged by charging resistor to capacitor；When the first relay disconnects, and the second relay is closed, the capacitor after charging discharge by discharge resistance, thus the generating process of one shelf depreciation of simulation.The utility model corrects partial discharge tester by providing demarcation signal, reduces error, ensure that the accurate judgement of partial discharge tester.
Description
Technical field
The utility model relates to signal generation apparatus fields, demarcate more particularly, to a kind of Partial discharge signal of pressure-adjustable
Instrument.
Background technique
Partial discharge test sensitivity with higher.For the high voltage electric equipment newly designed and manufactured, pass through part
Discharge measuring can find the weak link in insulation in time, prevent the use of the mistake and material in design and manufacturing process not
When being a kind of important method for identifying product insulation or equipment operational reliability, it can find that pressure test can not find sets
Standby defect.Shelf depreciation test is one of the big event of current power equipment preventive trial.
But it is irregular due to local discharge signal waveform itself, and decaying and signal in transmission process
The partial discharge amount and cable that system interference and error after entering partial discharge tester etc. cause partial discharge tester finally to show are practical
The partial discharge amount of generation makes a big difference.Therefore partial discharge tester is demarcated, is accurately had to the test of guarantee partial discharge important
Meaning.
Utility model content
The utility model overcomes the defect of existing GIS partial discharge test, provides a kind of Partial discharge signal of new pressure-adjustable
Marking apparatus.Then the utility model is observed shelf depreciation and is surveyed by the signal Q1 to partial discharge tester one known electricity of injection
Discharge capacity Q2 shown by instrument is tried, then is divided by obtain a Proportional coefficient K by the two, to complete to correct.
In order to solve the above technical problems, the technical solution of the utility model is as follows:
A kind of Partial discharge signal marking apparatus of pressure-adjustable, including micro-chip processor, signal generator, drive amplification circuit, by
Control voltage source, charging resistor, discharge resistance, the first relay, the second relay, capacitor, wherein
First output end of the micro-chip processor is electrically connected with the input terminal of signal generator；
The output end of the signal generator is electrically connected with the input terminal of drive amplification circuit；
The output end of the drive amplification circuit is electrically connected with the control terminal of the first relay；
The output end of the drive amplification circuit is electrically connected with the control terminal of the second relay；
The action logic of first relay is opposite with the second actuating of relay logic；
The second output terminal of the micro-chip processor is electrically connected with the control terminal of controlled voltage source；
The output end of the controlled voltage source is electrically connected with one end of charging resistor；
The other end of the charging resistor is electrically connected with one end of the switch-side of the first relay；
The other end of switch-side of first relay is electrically connected with one end of capacitor；
The other end of the capacitor is grounded；
The other end of the switch-side of first relay is electrically connected with one end of the switch-side of the second relay；
The other end of switch-side of second relay is electrically connected with one end of discharge resistance；
The other end of the discharge resistance is grounded.
Utility model works process is as follows:
By micro-chip processor control signal generator export square-wave signal, by square-wave signal control the first relay and
Second relay is cut-off, due to the work-based logic of the first relay and the second relay on the contrary, therefore when the first relay
Closure, when the second relay disconnects, micro-chip processor control controlled voltage source is charged by charging resistor to capacitor；When
One relay disconnects, and when the second relay is closed, the capacitor after charging discharge by discharge resistance, thus simulation one
The generating process of shelf depreciation.The known Partial discharge signal of generation is input to partial discharge tester, by calculating between the two
Difference, to realize the calibration to partial discharge tester.
AD5292 is powered using 30V in the use of the new type, it is possible to provide the electric current of maximum 2.5A fully meets the quick of capacitor
Charge target.And AD5292 internal memory, high resolution accurately control voltage accuracy, have 1024 kinds of adjustable voltages defeated
Out.
In a preferred solution, the controlled voltage source includes AD5292 chip, the first operational amplifier, first
Resistance, first diode, the second diode, N-channel MOS pipe and P-channel metal-oxide-semiconductor, wherein
Control terminal of the input terminal of the AD5292 chip as controlled voltage source；
The output end of the AD5292 chip is electrically connected with the non-inverting input terminal of the first operational amplifier；
The output end of first operational amplifier is electrically connected with the grid of N-channel MOS pipe；
The source electrode of the N-channel MOS pipe is grounded；
The source electrode of N-channel MOS pipe is electrically connected with the anode of first diode；
The cathode of the first diode is electrically connected with the drain electrode of N-channel MOS pipe；
The drain electrode of N-channel MOS pipe is electrically connected with one end of first resistor；
The other end of the first resistor is electrically connected with the drain electrode of P-channel metal-oxide-semiconductor；
The drain electrode of the P-channel metal-oxide-semiconductor is electrically connected with the cathode of the second diode；
The anode of second diode is electrically connected with the source electrode of P-channel metal-oxide-semiconductor；
The source electrode of the P-channel metal-oxide-semiconductor is electrically connected with the inverting input terminal of the first operational amplifier, first fortune
Calculate output end of the inverting input terminal of amplifier as controlled voltage source.
In a preferred solution, drive amplification circuit includes second resistance, 3rd resistor, the 4th resistance, the one or two
Pole pipe, the second diode, NPN triode, PNP triode, wherein
Input terminal of the cathode of the first diode as drive amplification circuit, the anode and third of first diode
One end of resistance is electrically connected；
The other end of the 3rd resistor is electrically connected with the ground level of NPN triode；
The other end of the 3rd resistor is electrically connected with one end of second resistance；
Another termination positive supply of the second resistance；
The collector of the NPN triode connects positive supply；
The emitter of the NPN triode is electrically connected with the emitter of PNP triode, and the emitter of NPN triode is made
For the output end of drive amplification circuit；
The cathode of the first diode is electrically connected with the anode of the second diode；
The cathode of second diode is electrically connected with the base stage of PNP triode；
The cathode of second diode is electrically connected with one end of the 4th resistance；
Another termination negative supply of 4th resistance；
The collector of the PNP triode connects negative supply.
In a preferred solution, the capacitor is high frequency ceramic disc capacitor.
In this preferred embodiment, ceramic disc capacitor possesses ESR(equivalent series resistance more lower than electrolytic capacitor).
In a preferred solution, first relay and the second relay are 5V relays.
In this preferred embodiment, contact damage may cause by relay tip by high current using midget relay,
So needing 5V relay.
In a preferred solution, the signal generator is ICL8038.
In a preferred solution, the Partial discharge signal marking apparatus further includes display module, the display module
Input terminal be electrically connected with the third output end of micro-chip processor.
In a preferred solution, first operational amplifier is OP184 chip.
In this preferred embodiment, OP184 chip has high pressure Slew Rate, low noise and rail-to-rail input-output characteristic.
In this preferred embodiment, display module is used to show the demarcation signal of Partial discharge signal marking apparatus output.
Compared with prior art, the beneficial effect of technical solutions of the utility model is:
The utility model structure is simple, and it is convenient to operate, and is corrected, is reduced to partial discharge tester by providing demarcation signal
Error, ensure that the accurate judgement of partial discharge tester.
Detailed description of the invention
Fig. 1 is the module map of embodiment.
Fig. 2 is the controlled voltage source module map of embodiment.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to better illustrate this embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent actual product
Size；
To those skilled in the art, it is to be understood that certain known features and its explanation, which may be omitted, in attached drawing
's.
The technical solution of the utility model is described further with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of superfrequency Partial discharge signal simulator, including MSP430F5, ICL8038, drive amplification electricity
Road, the first 5V relay, the 2nd 5V relay, charging resistor, charging resistor, discharge resistance, controlled voltage source, LCD display
With high frequency ceramic disc capacitor, wherein
The first output end of MSP430F5 is electrically connected with the input terminal of ICL8038；
The output end of ICL8038 is electrically connected with the input terminal of drive amplification circuit；
The output end of drive amplification circuit is electrically connected with the control terminal of the first 5V relay；
The output end of drive amplification circuit is electrically connected with the control terminal of the 2nd 5V relay；
The action logic of first 5V relay is opposite with the 2nd 5V actuating of relay logic；
The second output terminal of MSP430F5 is electrically connected with the control terminal of controlled voltage source；
The output end of controlled voltage source is electrically connected with one end of charging resistor；
The other end of charging resistor is electrically connected with one end of the switch-side of the first 5V relay；
The other end of the switch-side of first 5V relay is electrically connected with one end of high frequency ceramic disc capacitor；
The other end of high frequency ceramic disc capacitor is grounded；
The other end of the switch-side of first 5V relay is electrically connected with one end of the switch-side of the 2nd 5V relay；
The other end of switch-side of 2nd 5V relay is electrically connected with one end of discharge resistance；
The other end of discharge resistance is grounded；
The second output terminal of MSP430F5 is electrically connected with the input terminal of LCD display.
Wherein, as shown in Fig. 2, controlled voltage source includes AD5292 chip, OP184, first resistor, first diode,
Two diodes, N-channel MOS pipe and P-channel metal-oxide-semiconductor, wherein
Control terminal of the input terminal of AD5292 chip as controlled voltage source；
The output end of AD5292 chip is electrically connected with the non-inverting input terminal of OP184；
The output end of OP184 is electrically connected with the grid of N-channel MOS pipe；
The source electrode of N-channel MOS pipe is grounded；
The source electrode of N-channel MOS pipe is electrically connected with the anode of first diode；
The cathode of first diode is electrically connected with the drain electrode of N-channel MOS pipe；
The drain electrode of N-channel MOS pipe is electrically connected with one end of first resistor；
The other end of first resistor is electrically connected with the drain electrode of P-channel metal-oxide-semiconductor；
The drain electrode of P-channel metal-oxide-semiconductor is electrically connected with the cathode of the second diode；
The anode of second diode is electrically connected with the source electrode of P-channel metal-oxide-semiconductor；
The source electrode of P-channel metal-oxide-semiconductor is electrically connected with the inverting input terminal of OP184, and the inverting input terminal of OP184 is as controlled electricity
The output end of potential source.
Wherein, drive amplification circuit includes second resistance, 3rd resistor, the 4th resistance, first diode, the two or two pole
Pipe, NPN triode, PNP triode, wherein
Input terminal of the cathode of first diode as drive amplification circuit, the anode of first diode and 3rd resistor
One end electrical connection；
The other end of 3rd resistor is electrically connected with the ground level of NPN triode；
The other end of 3rd resistor is electrically connected with one end of second resistance；
Another termination positive supply of second resistance；
The collector of NPN triode connects positive supply；
The emitter of NPN triode is electrically connected with the emitter of PNP triode, and the emitter of NPN triode is as driving
The output end of amplifying circuit；
The cathode of first diode is electrically connected with the anode of the second diode；
The cathode of second diode is electrically connected with the base stage of PNP triode；
The cathode of second diode is electrically connected with one end of the 4th resistance；
Another termination negative supply of 4th resistance；
The collector of PNP triode connects negative supply.
The present embodiment course of work:
ICL8038 is controlled by MSP430F5 and exports square-wave signal, and the first 5V relay and the are controlled by square-wave signal
Two 5V relays are cut-off, since the work-based logic of the first 5V relay and the 2nd 5V relay is on the contrary, therefore as the first 5V
Relay closure, when the 2nd 5V relay disconnects, MSP430F5 controls controlled voltage source and gives high frequency tile electricity by charging resistor
Appearance charges；When the first 5V relay disconnects, and the 2nd 5V relay is closed, the high frequency ceramic disc capacitor after charging passes through electric discharge
Resistance discharge, thus the generating process of one shelf depreciation of simulation.The known Partial discharge signal of generation is input to office
Tester is put, by calculating difference between the two, to realize the calibration to partial discharge tester.
The same or similar label correspond to the same or similar components；
The terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent；
Obviously, the above embodiments of the present invention is merely examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.
Claims (9)
1. a kind of Partial discharge signal marking apparatus of pressure-adjustable, which is characterized in that put including micro-chip processor, signal generator, driving
Big circuit, controlled voltage source, charging resistor, discharge resistance, the first relay, the second relay, capacitor, wherein
First output end of the micro-chip processor is electrically connected with the input terminal of signal generator；
The output end of the signal generator is electrically connected with the input terminal of drive amplification circuit；
The output end of the drive amplification circuit is electrically connected with the control terminal of the first relay；
The output end of the drive amplification circuit is electrically connected with the control terminal of the second relay；
The action logic of first relay is opposite with the second actuating of relay logic；
The second output terminal of the micro-chip processor is electrically connected with the control terminal of controlled voltage source；
The output end of the controlled voltage source is electrically connected with one end of charging resistor；
The other end of the charging resistor is electrically connected with one end of the switch-side of the first relay；
The other end of switch-side of first relay is electrically connected with one end of capacitor；
The other end of the capacitor is grounded；
The other end of the switch-side of first relay is electrically connected with one end of the switch-side of the second relay；
The other end of switch-side of second relay is electrically connected with one end of discharge resistance；
The other end of the discharge resistance is grounded.
2. Partial discharge signal marking apparatus according to claim 1, which is characterized in that the controlled voltage source includes AD5292
Chip, the first operational amplifier, first resistor, first diode, the second diode, N-channel MOS pipe and P-channel metal-oxide-semiconductor,
In,
Control terminal of the input terminal of the AD5292 chip as controlled voltage source；
The output end of the AD5292 chip is electrically connected with the non-inverting input terminal of the first operational amplifier；
The output end of first operational amplifier is electrically connected with the grid of N-channel MOS pipe；
The source electrode of the N-channel MOS pipe is grounded；
The source electrode of N-channel MOS pipe is electrically connected with the anode of first diode；
The cathode of the first diode is electrically connected with the drain electrode of N-channel MOS pipe；
The drain electrode of N-channel MOS pipe is electrically connected with one end of first resistor；
The other end of the first resistor is electrically connected with the drain electrode of P-channel metal-oxide-semiconductor；
The drain electrode of the P-channel metal-oxide-semiconductor is electrically connected with the cathode of the second diode；
The anode of second diode is electrically connected with the source electrode of P-channel metal-oxide-semiconductor；
The source electrode of the P-channel metal-oxide-semiconductor is electrically connected with the inverting input terminal of the first operational amplifier, and first operation is put
Output end of the inverting input terminal of big device as controlled voltage source.
3. Partial discharge signal marking apparatus according to claim 1 or 2, which is characterized in that the drive amplification circuit includes
Second resistance, 3rd resistor, the 4th resistance, first diode, the second diode, NPN triode, PNP triode, wherein
Input terminal of the cathode of the first diode as drive amplification circuit, the anode and 3rd resistor of first diode
One end electrical connection；
The other end of the 3rd resistor is electrically connected with the ground level of NPN triode；
The other end of the 3rd resistor is electrically connected with one end of second resistance；
Another termination positive supply of the second resistance；
The collector of the NPN triode connects positive supply；
The emitter of the NPN triode is electrically connected with the emitter of PNP triode, and the emitter of NPN triode is as drive
The output end of dynamic amplifying circuit；
The cathode of the first diode is electrically connected with the anode of the second diode；
The cathode of second diode is electrically connected with the base stage of PNP triode；
The cathode of second diode is electrically connected with one end of the 4th resistance；
Another termination negative supply of 4th resistance；
The collector of the PNP triode connects negative supply.
4. Partial discharge signal marking apparatus according to claim 3, which is characterized in that the capacitor is ceramic disc capacitor.
5. Partial discharge signal marking apparatus according to claim 1,2 or 4, which is characterized in that first relay and
Two relays are 5V relays.
6. Partial discharge signal marking apparatus according to claim 5, which is characterized in that the signal generator is ICL8038.
7. Partial discharge signal marking apparatus according to claim 1,2 or 4, which is characterized in that the signal generator is
ICL8038。
8. according to claim 1, Partial discharge signal marking apparatus described in 2,4 or 6, which is characterized in that the Partial discharge signal calibration
Instrument further includes display module, and the input terminal of the display module is electrically connected with the third output end of micro-chip processor.
9. Partial discharge signal marking apparatus according to claim 7, which is characterized in that the Partial discharge signal marking apparatus further includes
Display module, the input terminal of the display module are electrically connected with the third output end of micro-chip processor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820835861.5U CN208569014U (en) | 2018-05-31 | 2018-05-31 | A kind of Partial discharge signal marking apparatus of pressure-adjustable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820835861.5U CN208569014U (en) | 2018-05-31 | 2018-05-31 | A kind of Partial discharge signal marking apparatus of pressure-adjustable |
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| CN208569014U true CN208569014U (en) | 2019-03-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110554342A (en) * | 2018-05-31 | 2019-12-10 | 广东电网有限责任公司 | partial discharge signal calibration instrument capable of regulating voltage |
-
2018
- 2018-05-31 CN CN201820835861.5U patent/CN208569014U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110554342A (en) * | 2018-05-31 | 2019-12-10 | 广东电网有限责任公司 | partial discharge signal calibration instrument capable of regulating voltage |
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