CN206892307U - A kind of superfrequency partial enlargement signal generator - Google Patents
A kind of superfrequency partial enlargement signal generator Download PDFInfo
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- CN206892307U CN206892307U CN201720763710.9U CN201720763710U CN206892307U CN 206892307 U CN206892307 U CN 206892307U CN 201720763710 U CN201720763710 U CN 201720763710U CN 206892307 U CN206892307 U CN 206892307U
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- relay
- electrically connects
- signal generator
- partial enlargement
- resistance
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Abstract
The utility model overcomes the defects of existing instrument for measuring partial discharge, there is provided a kind of new superfrequency partial enlargement signal generator, the sensor of instrument for measuring partial discharge can be detected.The utility model includes microprocessor, constant pressure source, display device and transmission circuit.The utility model is simple in construction, simple and efficient to handle, is applicable to a variety of environment.Shelf depreciation test to electrical equipment has good booster action.
Description
Technical field
Signal generation apparatus field is the utility model is related to, is sent out more particularly, to a kind of superfrequency partial enlargement signal
Raw device.
Background technology
The new high voltage electric equipment for designing and manufacturing, the weak ring in insulation can be found in time by measurement of partial discharge
Section, prevent design and the mistake in manufacturing process and the improper use of material.Shelf depreciation test is to differentiate product insulation or set
A kind of important method of standby operational reliability.It can find the equipment deficiency that pressure test can not be found.Shelf depreciation is tested
One of big event of current power equipment preventive trial.
In GIS equipment partial discharge test, when shelf depreciation occurring inside GIS device, surveyed first by shelf depreciation
The sensor for trying instrument receives, then is analyzed and handled by instrument for measuring partial discharge.But due to part instrument for measuring partial discharge
The defects of transducer sensitivity is relatively low be present, can cause problems with occurs：
1st, when GIS device using this sensor to receive local discharge signal when, there occurs part inside GIS device
Electric discharge, may cause sensor can not detect this signal.
2nd, the HFS in GIS partial discharge tester general test local discharge signal, and high-frequency signal is being propagated
During can decay it is bigger, when shelf depreciation occurring inside the GIS device, probably due to the installation position of sensor is farther out,
And it can't detect this local discharge signal.
The ultrahigh frequency partial discharge signal of high voltage amplitude is simulated, for detecting the sensing of GIS partial discharge tester
Device whether can normal work, there is actual meaning.
Utility model content
The utility model overcomes the defects of above-mentioned existing instrument for measuring partial discharge, there is provided a kind of new superfrequency office
Portion's amplified signal generator, the sensor of instrument for measuring partial discharge can be detected.The utility model is simple in construction, operation letter
Just it is quick, it is applicable to a variety of environment.
In order to solve the above technical problems, the technical solution of the utility model is as follows：
A kind of superfrequency partial enlargement signal generator, including microprocessor, constant pressure source, display device and transmission circuit,
Its annexation is as follows：
Microprocessor electrically connects with transmission circuit；
Microprocessor electrically connects with display device；
The output end of constant pressure source electrically connects with transmission circuit.
Utility model works process is as follows：
Microprocessor realizes that the square wave of certain frequency is exported to transmission circuit by delay procedure, and letter is examined so as to realize
Number synchronizing cycle is adjustable.The output voltage of constant pressure source forms local discharge signal after transmission circuit, by by shelf depreciation
Signal and the sensor of instrument for measuring partial discharge contrast to the measured value of local discharge signal, so as to complete to put to local
The sensor detection of electric tester.LCD screen is used for the amplitude and frequency for showing superfrequency partial enlargement signal generator output signal
Rate.
A kind of microprocessor described in preferable scheme is the ARM chips of STM32 series.STM32 family chips have
There is the characteristics of dominant frequency is high, calculation function is powerful.
In a kind of preferable scheme, described display device is LCD screen.
In a kind of preferable scheme, described constant pressure source includes in-phase proportion computing circuit, bleeder circuit, proportional current
Source and triode, the signal output part of the output end of proportion current source as superfrequency partial enlargement signal generator, it is connected
Relation is as follows：
The output end of bleeder circuit is electrically connected by resistance with the inverting input of in-phase proportion computing circuit；
The output end of proportion current source is electrically connected by resistance with the in-phase input end of in-phase proportion computing circuit；
The output end of in-phase proportion computing circuit is electrically connected by resistance with the base stage of triode；
The output end of proportion current source electrically connects with the colelctor electrode of triode.
Output voltage >=100V of constant pressure source, output current >=1A, it ensure that the quick charge of transmission circuit, increase simulation
The rising steepness of local discharge signal.
In a kind of preferable scheme, described in-phase proportion computing circuit includes an operational amplifier, operation amplifier
The model of device is high pressure amplifier OP07CP.High pressure amplifier OP07CP has the characteristics of low noise, anti-high pressure.
In a kind of preferable scheme, described proportion current source includes two triodes, and the model of triode is high pressure
Triode FZT758.High-voltage three-pole pipe FZT758 has the characteristics of anti-high pressure.
In a kind of preferable scheme, the model of the triode of described constant pressure source is high-voltage three-pole pipe FZT658.High pressure
Triode FZT658 has the characteristics of anti-high pressure.
In a kind of preferable scheme, described transmission circuit includes first resistor, second resistance, the first relay, the
Two relays and electric capacity, its annexation are as follows：
First resistor has first end and the second end, and second resistance has first end and the second end, and the first relay includes first
End, the second end and control terminal, the second relay have first end, the second end and control terminal, and electric capacity has first end and the second end；
The first end of variable voltage source electrically connects with the first end of first resistor；
Second end of first resistor electrically connects with the first end of the first relay；
Second end of the first relay electrically connects with the first end of electric capacity；
The control terminal of first relay electrically connects with ARM；
First end of the first end of electric capacity also with the second relay electrically connects；
Second end of the second relay electrically connects with the first end of second resistance；
The control terminal of second relay electrically connects with ARM；
Second end of second resistance electrically connects with the second end of electric capacity.
In a kind of preferable scheme, described electric capacity is ceramic disc capacitor.Ceramic disc capacitor possesses lower than electrochemical capacitor
ESR (equivalent series resistance).
In a kind of preferable scheme, the first described relay and the second relay adjust closure/disconnection by ARM
State.
The utility model principle is as follows：
Input impedance of the second resistance as instrument for measuring partial discharge, electric capacity are used for storing electricity, and variable voltage source provides
Voltage U, the first relay is as normal closing relay, and the second relay is as normal off open relay.Therefore electricity can be calculated
It is Q=U*C to hold stored electricity (C is the capacity of electric capacity).Electric capacity will be put by second resistance after the first relay closes
Electricity.Therefore electric capacity works as repid discharge, could approx be used as local discharge signal.And when electric capacity discharges, the first relay from
Normally off is changed into off-state, stops charging.
The interval of discharge and recharge is determined by ARM chips by the relay of Control first and the second relay.It is adjustable
The output voltage of voltage source forms local discharge signal after the discharge and recharge of transmission circuit, by by local discharge signal and office
Portion's discharge tester contrasts to the measured value of local discharge signal, so as to be carried out to the sensor of instrument for measuring partial discharge
Detection.
Compared with prior art, the beneficial effect of technical solutions of the utility model is：The utility model provides a kind of new
Superfrequency partial enlargement signal generator, the sensor of instrument for measuring partial discharge can be detected.The utility model structure
Simply, it is simple and efficient to handle, it is applicable to a variety of environment.There is auxiliary work well to local discharge test to electrical equipment
With.
Brief description of the drawings
Fig. 1 is the utility model structure chart.
Fig. 2 is constant pressure source physical circuit figure.
Label declaration：1. first resistor, 2. first relays, 3. electric capacity, 4. second relays, 5. second resistances.
Embodiment
Accompanying drawing being given for example only property explanation, it is impossible to be interpreted as the limitation to this patent；
In order to more preferably illustrate the present embodiment, some parts of accompanying drawing have omission, zoomed in or out, and do not represent actual product
Size；
To those skilled in the art, it is to be appreciated that some known features and its explanation, which may be omitted, in accompanying 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 enlargement signal generator, including STM32, constant pressure source, LCD and transmission electricity
Road, its annexation are as follows：
STM32 electrically connects with transmission circuit；
STM32 electrically connects with LCD screen；
The output end of constant pressure source electrically connects with transmission circuit.
As shown in Fig. 2 described constant pressure source includes in-phase proportion computing circuit, bleeder circuit, proportion current source and high pressure
Triode FZT658, in-phase proportion computing circuit includes a high pressure amplifier OP07CP, proportion current source includes two high pressures three
The signal output part of pole pipe FZT758, the output end of proportion current source as superfrequency partial enlargement signal generator, it is connected
Relation is as follows：
The output end of bleeder circuit is electrically connected by resistance with high pressure amplifier OP07CP inverting input；
The output end of proportion current source is electrically connected by resistance with high pressure amplifier OP07CP in-phase input end；
The output end of in-phase proportion computing circuit is electrically connected by resistance with high-voltage three-pole pipe FZT658 base stage；
The output end of proportion current source electrically connects with high-voltage three-pole pipe FZT658 colelctor electrode.
Transmission circuit includes first resistor, second resistance, the first relay, the second relay and ceramic disc capacitor, and it is connected
Relation is as follows：
First resistor has first end and the second end, and second resistance has first end and the second end, and the first relay includes first
End, the second end and control terminal, the second relay have first end, the second end and control terminal, and ceramic disc capacitor has first end and the second end；
The first end of variable voltage source electrically connects with the first end of first resistor；
Second end of first resistor electrically connects with the first end of the first relay；
Second end of the first relay electrically connects with the first end of ceramic disc capacitor；
The control terminal of first relay electrically connects with STM32；
First end of the first end of ceramic disc capacitor also with the second relay electrically connects；
Second end of the second relay electrically connects with the first end of second resistance；
The control terminal of second relay electrically connects with STM32；
Second end of second resistance electrically connects with the second end of electric capacity；
Second end of ceramic disc capacitor also electrically connects with the second end of variable voltage source.
First relay adjusts the state of cut-off/close by STM32.
Second relay adjusts the state of cut-off/close by STM32.
The present embodiment course of work is as follows：
The discharge and recharge time of STM32 controlling transmission circuits.Constant pressure source will be from bleeder circuit by in-phase proportion computing circuit
The voltage increase of acquisition, is that constant output voltage reaches more than 100V.Meanwhile constant pressure source passing ratio current source is not less than
1A output current, so as to which the ceramic disc capacitor for being is able to fast charging and discharging.Constant pressure source forms shelf depreciation letter by transmission circuit
Number.Local discharge signal is transferred to instrument for measuring partial discharge, by the way that local discharge signal and instrument for measuring partial discharge are played a game
The measured value of portion's discharge signal is contrasted, so as to complete a following test to instrument for measuring partial discharge.
In the present embodiment, with reference to the output signal of constant-current source, the charging interval of electric capacity is less than 1ns, that is, the part simulated is put
Frequency up to signal can reach 1Ghz or so, meet the technical indicator of simulation partial enlargement signal.
Term the being given for example only property explanation of position relationship described in accompanying drawing, it is impossible to be interpreted as the limitation to this patent；
Obviously, above-described embodiment of the present utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms.There is no need and unable to give all embodiments
It is exhaustive.All made within spirit of the present utility model and principle all any modification, equivalent and improvement etc., should be included in
Within the protection domain of the utility model claims.
Claims (10)
- A kind of 1. superfrequency partial enlargement signal generator, it is characterised in that including microprocessor, constant pressure source, display device and Transmission circuit, its annexation are as follows：Microprocessor electrically connects with transmission circuit；Microprocessor electrically connects with display device；The output end of constant pressure source electrically connects with transmission circuit.
- 2. superfrequency partial enlargement signal generator according to claim 1, it is characterised in that described microprocessor is The ARM chips of STM32 series.
- 3. superfrequency partial enlargement signal generator according to claim 1 or 2, it is characterised in that described display dress It is LCD screen to put.
- 4. superfrequency partial enlargement signal generator according to claim 2, it is characterised in that described constant pressure source includes In-phase proportion computing circuit, bleeder circuit, proportion current source and triode, the output end of proportion current source are local as superfrequency The signal output part of amplified signal generator, its annexation are as follows：The output end of bleeder circuit is electrically connected by resistance with the inverting input of in-phase proportion computing circuit；The output end of proportion current source is electrically connected by resistance with the in-phase input end of in-phase proportion computing circuit；The output end of in-phase proportion computing circuit is electrically connected by resistance with the base stage of triode；The output end of proportion current source electrically connects with the colelctor electrode of triode.
- 5. superfrequency partial enlargement signal generator according to claim 4, it is characterised in that described in-phase proportion fortune Calculating circuit includes an operational amplifier, and the model of operational amplifier is high pressure amplifier OP07CP.
- 6. superfrequency partial enlargement signal generator according to claim 4, it is characterised in that described proportion current source Including two triodes, the model of triode is high-voltage three-pole pipe FZT758.
- 7. superfrequency partial enlargement signal generator according to claim 4, it is characterised in that the type of described triode Number it is high-voltage three-pole pipe FZT658.
- 8. superfrequency partial enlargement signal generator according to claim 2, it is characterised in that described transmission circuit bag First resistor, second resistance, the first relay, the second relay and electric capacity are included, its annexation is as follows：First resistor has a first end and the second end, and second resistance has a first end and the second end, and the first relay includes first end, the Two ends and control terminal, the second relay have first end, the second end and control terminal, and electric capacity has first end and the second end；The first end of variable voltage source electrically connects with the first end of first resistor；Second end of first resistor electrically connects with the first end of the first relay；Second end of the first relay electrically connects with the first end of electric capacity；The control terminal of first relay electrically connects with ARM；First end of the first end of electric capacity also with the second relay electrically connects；Second end of the second relay electrically connects with the first end of second resistance；The control terminal of second relay electrically connects with ARM；Second end of second resistance electrically connects with the second end of electric capacity.
- 9. superfrequency partial enlargement signal generator according to claim 8, it is characterised in that described electric capacity is ceramics Electric capacity.
- 10. superfrequency partial enlargement signal generator according to claim 8, it is characterised in that the first described relay Device and the second relay adjust the state of closure/disconnection by ARM.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720763710.9U CN206892307U (en) | 2017-06-27 | 2017-06-27 | A kind of superfrequency partial enlargement signal generator |
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|---|---|---|---|
| CN201720763710.9U CN206892307U (en) | 2017-06-27 | 2017-06-27 | A kind of superfrequency partial enlargement signal generator |
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| CN206892307U true CN206892307U (en) | 2018-01-16 |
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Cited By (1)
| 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 |
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2017
- 2017-06-27 CN CN201720763710.9U patent/CN206892307U/en active Active
Cited By (1)
| 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 |
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