CN208705465U - A kind of superfrequency Partial discharge signal simulator with overvoltage diagnostic function - Google Patents
A kind of superfrequency Partial discharge signal simulator with overvoltage diagnostic function Download PDFInfo
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- CN208705465U CN208705465U CN201820833483.7U CN201820833483U CN208705465U CN 208705465 U CN208705465 U CN 208705465U CN 201820833483 U CN201820833483 U CN 201820833483U CN 208705465 U CN208705465 U CN 208705465U
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Abstract
The utility model discloses a kind of superfrequency Partial discharge signal simulator with overvoltage diagnostic function, including micro-chip processor, signal generator, drive amplification circuit, constant pressure source, voltage detection module, charging resistor, discharge resistance, the first relay, the second relay, first capacitor, third relay.The utility model has the beneficial effects that 1, simulate the superfrequency shelf depreciation of high voltage amplitude, for detecting whether GIS partial discharge test sensor can work normally, the effective guarantee safety of power equipment；2, have the function of Zenith tracking, can effectively prevent since Partial discharge signal overtension two causes subsequent conditioning circuit to damage.
Description
Technical field
The utility model relates to voltage diagnostic device field, more particularly, to a kind of with overvoltage diagnostic function
Superfrequency Partial discharge signal simulator.
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.
In GIS equipment partial discharge test, when shelf depreciation occurring inside GIS device, first have to be tested by partial discharge
The sensor of instrument receives, then is analyzed and handled by partial discharge tester.Since present partial discharge test sensor producer is numerous,
Product is very different, and for many sensors because of quality problems, sensitivity is very low, just may cause following problems i.e. in this way:
When GIS device using this sensor to receive Partial discharge signal when, partial discharge has occurred inside GIS device, may
The sensor can not detect this signal.
High frequency section in GIS partial discharge tester general test Partial discharge signal, and high-frequency signal can decline in communication process
Subtract bigger, when partial discharge occurring inside the GIS device, probably due to the installation position of sensor is farther out, and can't detect this
Partial discharge signal.
Utility model content
The utility model overcomes the defect of existing GIS partial discharge tester, and providing a kind of new has overvoltage diagnosis
The superfrequency Partial discharge signal simulator of function.The superfrequency shelf depreciation of the utility model analog high voltage amplitude, is used to
Whether detection GIS partial discharge test sensor can work normally；Have the function of Zenith tracking, can effectively prevent due to Partial discharge signal
Overtension two causes subsequent conditioning circuit to damage.
In order to solve the above technical problems, the technical solution of the utility model is as follows:
A kind of superfrequency Partial discharge signal simulator with overvoltage diagnostic function, which is characterized in that including micro process
Chip, signal generator, drive amplification circuit, constant pressure source, voltage detection module, charging resistor, discharge resistance, the first relay
Device, the second relay, first capacitor, third relay, wherein
First output end of the micro-chip processor is electrically connected with the input terminal of signal generator；
The second output terminal of the micro-chip processor is electrically connected with the control terminal of third relay；
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 output end of the constant pressure source is electrically connected with one end of charging resistor；
The output end of the constant pressure source is electrically connected with the input terminal of voltage detection module；
The output end of the voltage detection module is electrically connected with the input terminal of micro-chip processor；
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 first 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；
One end of the switch-side of the third relay connects power supply；
The other end of switch-side of the third relay is electrically connected with the input terminal of constant pressure source；
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, constant pressure source is charged by charging resistor to capacitor；When the first relay disconnect, second
When relay is closed, the capacitor after charging discharge by discharge resistance, thus the generation of one shelf depreciation of simulation
Journey tests sensor.Meanwhile being detected by output voltage of the voltage detection module to constant pressure source, it will test knot
Fruit is sent to micro-chip processor.When the output voltage of micro-chip processor detection constant pressure source exceeds threshold value, third relay is controlled
It disconnects, cuts off the power end of constant pressure source, realize overvoltage protection.
In a preferred solution, the voltage detection module include first resistor, second resistance, 3rd resistor,
4th resistance, the 5th resistance, the 6th resistance, the first operational amplifier and low-pass filter circuit, wherein
Input terminal of the one end of the first resistor as voltage detection module, the other end of first resistor and the second electricity
One end of resistance is electrically connected；
The other end of the second resistance is grounded；
One end of the first resistor is electrically connected with one end of 3rd resistor；
The other end of the first resistor is electrically connected with one end of the 4th resistance；
The other end of the 3rd resistor is electrically connected with the non-inverting input terminal of the first operational amplifier；
The other end of 4th resistance is electrically connected with the inverting input terminal of the first operational amplifier；
The other end of the 3rd resistor is electrically connected with one end of the 5th resistance；
The other end of 4th resistance is electrically connected with one end of the 6th resistance；
The other end of 5th resistance is grounded；
The other end of 6th resistance is electrically connected with the output end of the first operational amplifier；
The output end of first operational amplifier is electrically connected with the input terminal of low-pass filter circuit, low-pass filter circuit
Output end of the output end as voltage detection module.
In a preferred solution, the low-pass filter circuit includes the first tunable capacitor, the second tunable capacitor, the
Three tunable capacitors, inductance, wherein
Input terminal of the one end of the inductance as the first low-pass filter circuit, the other end of inductance is as the first low pass
The output end of filter circuit；
One end of the inductance is electrically connected with one end of the first tunable capacitor；
The other end of first tunable capacitor is grounded；
One end of the inductance is electrically connected with one end of the second tunable capacitor；
The other end of the inductance is electrically connected with the other end of the second tunable capacitor；
The other end of the inductance is electrically connected with one end of third tunable capacitor；
The other end of the third tunable capacitor is grounded.
In a preferred solution, the constant pressure source includes in-phase proportion computing circuit, bleeder circuit, proportional current
Source and triode, wherein
Signal output end of the output end of the proportion current source as superfrequency partial enlargement signal generator,
The output end of the bleeder circuit is electrically connected by resistance with the inverting input terminal of in-phase proportion computing circuit；
The output end of the proportion current source is electrically connected by resistance with the non-inverting input terminal of in-phase proportion computing circuit；
The output end of the in-phase proportion computing circuit is electrically connected by resistance with the base stage of triode；
The output end of the proportion current source is electrically connected with the collector of triode.
In a preferred solution, the drive amplification circuit include the 7th resistance, the 8th resistance, the 9th 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 of first diode and the 8th
One end of resistance is electrically connected；
The other end of 8th resistance is electrically connected with the ground level of NPN triode；
The other end of 8th resistance is electrically connected with one end of the 7th resistance；
Another termination positive supply of 7th 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 9th resistance；
Another termination negative supply of 9th resistance；
The collector of the PNP triode connects negative supply.
In a preferred solution, the overvoltage diagnostic device further includes the first zener diode and the second pressure stabilizing
Diode, wherein
The anode of first zener diode is electrically connected with the output end of voltage detection module；
The cathode of first zener diode connects power supply；
The cathode of second zener diode is electrically connected with the output end of voltage detection module；
The plus earth of second zener diode.
This preferred embodiment, the first zener diode and the second zener diode realize the function of pressure stabilizing.
In a preferred solution, the superfrequency Partial discharge signal simulator further includes display module, described
The input terminal of display module is electrically connected with the third output end of micro-chip processor.
In this preferred embodiment, display module is used to show the relevant information of the output voltage of constant pressure source.
In a preferred solution, the superfrequency Partial discharge signal simulator further includes data storage, described
The input terminal of data storage be electrically connected with the 4th output end of micro-chip processor.
In this preferred embodiment, data storage, the relevant information of the output voltage for storing constant pressure source.
In a preferred solution, the micro-chip processor is MSP430F149.
In this preferred embodiment, MSP430F149 dominant frequency reaches as high as 8MHz, has the characteristics that low in energy consumption, operation is fast.
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 first capacitor is high frequency ceramic disc capacitor.
Compared with prior art, the beneficial effect of technical solutions of the utility model is:
1, the superfrequency shelf depreciation of high voltage amplitude is simulated, whether can be normal for detecting GIS partial discharge test sensor
Work, the effective guarantee safety of power equipment；
2, have the function of Zenith tracking, can effectively prevent since Partial discharge signal overtension two causes subsequent conditioning circuit to damage
It is bad.
Detailed description of the invention
Fig. 1 is the module map of embodiment.
Fig. 2 is the constant voltage power supply circuit figure of embodiment.
Fig. 3 is the low-pass filter circuit figure 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 with overvoltage diagnostic function, including
MSP430F149, ICL8038, drive amplification circuit, the first 5V relay, the 2nd 5V relay, charging resistor, charging resistor,
Discharge resistance, constant pressure source, voltage detection module, third relay, LCD display module, TF card and high frequency ceramic disc capacitor, wherein
The first output end of MSP430F149 is electrically connected with the input terminal of ICL8038；
The second output terminal of MSP430F149 is electrically connected with the control terminal of third relay；
The third output end of MSP430F149 is electrically connected with the input terminal of LCD display module；
The 4th output end of MSP430F149 is electrically connected with the input terminal of TF card；
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 output end of constant pressure source is electrically connected with one end of charging resistor；
The output end of constant pressure source is electrically connected with the input terminal of voltage detection module；
The output end of voltage detection module is electrically connected with the input terminal of MSP430F149；
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；
One end of the switch-side of third relay connects power supply；
The other end of the switch-side of third relay is electrically connected with the input terminal of constant pressure source.
Wherein, voltage detection module includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance,
Six resistance, the first operational amplifier and low-pass filter circuit, wherein
The one of input terminal of the one end of first resistor as voltage detection module, the other end of first resistor and second resistance
End electrical connection；
The other end of second resistance is grounded；
One end of first resistor is electrically connected with one end of 3rd resistor；
The other end of first resistor is electrically connected with one end of the 4th resistance；
The other end of 3rd resistor is electrically connected with the non-inverting input terminal of the first operational amplifier；
The other end of 4th resistance is electrically connected with the inverting input terminal of the first operational amplifier；
The other end of 3rd resistor is electrically connected with one end of the 5th resistance；
The other end of 4th resistance is electrically connected with one end of the 6th resistance；
The other end of 5th resistance is grounded；
The other end of 6th resistance is electrically connected with the output end of the first operational amplifier；
The output end of first operational amplifier is electrically connected with the input terminal of low-pass filter circuit, the output of low-pass filter circuit
Hold the output end as voltage detection module.
Wherein, as shown in Fig. 2, constant pressure source includes in-phase proportion computing circuit, bleeder circuit, proportion current source and three poles
Pipe, wherein
Signal output end of the output end of proportion current source as superfrequency partial enlargement signal generator,
The output end of bleeder circuit is electrically connected by resistance with the inverting input terminal of in-phase proportion computing circuit；
The output end of proportion current source is electrically connected by resistance with the non-inverting input terminal 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 is electrically connected with the collector of triode.
Wherein, as shown in figure 3, low-pass filter circuit includes the first tunable capacitor, the second tunable capacitor, third adjustable electric
Hold, inductance, wherein
Input terminal of the one end of inductance as the first low-pass filter circuit, the other end of inductance is as the first low-pass filtering electricity
The output end on road；
One end of inductance is electrically connected with one end of the first tunable capacitor；
The other end of first tunable capacitor is grounded；
One end of inductance is electrically connected with one end of the second tunable capacitor；
The other end of inductance is electrically connected with the other end of the second tunable capacitor；
The other end of inductance is electrically connected with one end of third tunable capacitor；
The other end of third tunable capacitor is grounded.
Wherein, drive amplification circuit includes the 7th resistance, the 8th resistance, the 9th 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 the 8th resistance
One end electrical connection；
The other end of 8th resistance is electrically connected with the ground level of NPN triode；
The other end of 8th resistance is electrically connected with one end of the 7th resistance；
Another termination positive supply of 7th 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 9th resistance；
Another termination negative supply of 9th resistance；
The collector of PNP triode connects negative supply.
Wherein, overvoltage diagnostic device further includes the first zener diode and the second zener diode, wherein
The anode of first zener diode is electrically connected with the output end of voltage detection module；
The cathode of first zener diode connects power supply；
The cathode of second zener diode is electrically connected with the output end of voltage detection module；
The plus earth of second zener diode.
The present embodiment course of work:
By MSP430F149 control ICL8038 export square-wave signal, by square-wave signal control the first 5V relay and
2nd 5V relay is cut-off, since the work-based logic of the first 5V relay and the 2nd 5V relay is on the contrary, therefore when first
5V relay closure, when the 2nd 5V relay disconnects, constant pressure source is charged by charging resistor to high frequency ceramic disc capacitor；When
One 5V relay disconnects, and when the 2nd 5V relay is closed, the high frequency ceramic disc capacitor after charging discharge by discharge resistance,
To the generating process of one shelf depreciation of simulation, sensor is tested.Meanwhile by voltage detection module to constant pressure source
Output voltage detected, will test result and be sent to MSP430F149.When the output electricity of MSP430F149 detection constant pressure source
When pressure is beyond threshold value, control third relay is disconnected, and cuts off the power end of constant pressure source, realizes overvoltage protection.
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 (10)
1. a kind of superfrequency Partial discharge signal simulator with overvoltage diagnostic function, which is characterized in that including micro process core
Piece, signal generator, drive amplification circuit, constant pressure source, voltage detection module, charging resistor, discharge resistance, the first relay,
Second relay, first capacitor, third relay, wherein
First output end of the micro-chip processor is electrically connected with the input terminal of signal generator；
The second output terminal of the micro-chip processor is electrically connected with the control terminal of third relay；
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 output end of the constant pressure source is electrically connected with one end of charging resistor；
The output end of the constant pressure source is electrically connected with the input terminal of voltage detection module；
The output end of the voltage detection module is electrically connected with the input terminal of micro-chip processor；
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 first 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；
One end of the switch-side of the third relay connects power supply；
The other end of switch-side of the third relay is electrically connected with the input terminal of constant pressure source；
The other end of the discharge resistance is grounded.
2. superfrequency Partial discharge signal simulator according to claim 1, which is characterized in that the voltage detection module
Including first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the first operational amplifier and low
Bandpass filter circuit, wherein
Input terminal of the one end of the first resistor as voltage detection module, the other end of first resistor and second resistance
One end electrical connection；
The other end of the second resistance is grounded；
One end of the first resistor is electrically connected with one end of 3rd resistor；
The other end of the first resistor is electrically connected with one end of the 4th resistance；
The other end of the 3rd resistor is electrically connected with the non-inverting input terminal of the first operational amplifier；
The other end of 4th resistance is electrically connected with the inverting input terminal of the first operational amplifier；
The other end of the 3rd resistor is electrically connected with one end of the 5th resistance；
The other end of 4th resistance is electrically connected with one end of the 6th resistance；
The other end of 5th resistance is grounded；
The other end of 6th resistance is electrically connected with the output end of the first operational amplifier；
The output end of first operational amplifier is electrically connected with the input terminal of low-pass filter circuit, low-pass filter circuit it is defeated
Output end of the outlet as voltage detection module.
3. superfrequency Partial discharge signal simulator according to claim 2, which is characterized in that the low-pass filter circuit
Including the first tunable capacitor, the second tunable capacitor, third tunable capacitor, inductance, wherein
Input terminal of the one end of the inductance as the first low-pass filter circuit, the other end of inductance is as the first low-pass filtering
The output end of circuit；
One end of the inductance is electrically connected with one end of the first tunable capacitor；
The other end of first tunable capacitor is grounded；
One end of the inductance is electrically connected with one end of the second tunable capacitor；
The other end of the inductance is electrically connected with the other end of the second tunable capacitor；
The other end of the inductance is electrically connected with one end of third tunable capacitor；
The other end of the third tunable capacitor is grounded.
4. according to claim 1 to superfrequency Partial discharge signal simulator described in any claim in 3, which is characterized in that
The constant pressure source includes in-phase proportion computing circuit, bleeder circuit, proportion current source and triode, wherein
Signal output end of the output end of the proportion current source as superfrequency partial enlargement signal generator,
The output end of the bleeder circuit is electrically connected by resistance with the inverting input terminal of in-phase proportion computing circuit；
The output end of the proportion current source is electrically connected by resistance with the non-inverting input terminal of in-phase proportion computing circuit；
The output end of the in-phase proportion computing circuit is electrically connected by resistance with the base stage of triode；
The output end of the proportion current source is electrically connected with the collector of triode.
5. superfrequency Partial discharge signal simulator according to claim 4, which is characterized in that the drive amplification circuit
Including the 7th resistance, the 8th resistance, the 9th resistance, first diode, the second diode, NPN triode, PNP triode,
In,
Input terminal of the cathode of the first diode as drive amplification circuit, the anode of first diode and the 8th resistance
One end electrical connection；
The other end of 8th resistance is electrically connected with the ground level of NPN triode；
The other end of 8th resistance is electrically connected with one end of the 7th resistance；
Another termination positive supply of 7th 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 9th resistance；
Another termination negative supply of 9th resistance；
The collector of the PNP triode connects negative supply.
6. according to claim 1, superfrequency Partial discharge signal simulator described in 2,3 or 5, which is characterized in that described is excessively electric
Pressing diagnostic device further includes the first zener diode and the second zener diode, wherein
The anode of first zener diode is electrically connected with the output end of voltage detection module；
The cathode of first zener diode connects power supply；
The cathode of second zener diode is electrically connected with the output end of voltage detection module；
The plus earth of second zener diode.
7. superfrequency Partial discharge signal simulator according to claim 6, which is characterized in that the superfrequency partial discharge letter
Number simulator further includes display module, and the input terminal of the display module and the third output end of micro-chip processor are electrically connected
It connects.
8. according to claim 1, superfrequency Partial discharge signal simulator described in 2,3,5 or 7, which is characterized in that the spy
High frequency Partial discharge signal simulator further includes data storage, and the of the input terminal of the data storage and micro-chip processor
The electrical connection of four output ends.
9. superfrequency Partial discharge signal simulator according to claim 8, which is characterized in that first relay and
Second relay is 5V relay.
10. according to claim 1, superfrequency Partial discharge signal simulator described in 2,3,5,7 or 9, which is characterized in that described
Signal generator is ICL8038.
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| CN110554344A (en) * | 2018-05-31 | 2019-12-10 | 广东电网有限责任公司 | ultrahigh frequency partial discharge signal simulation device with overvoltage diagnosis function |
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