CN208636417U - A kind of Partial discharge signal simulator with temperature measurement and overvoltage protection - Google Patents

A kind of Partial discharge signal simulator with temperature measurement and overvoltage protection Download PDF

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Publication number
CN208636417U
CN208636417U CN201821033868.1U CN201821033868U CN208636417U CN 208636417 U CN208636417 U CN 208636417U CN 201821033868 U CN201821033868 U CN 201821033868U CN 208636417 U CN208636417 U CN 208636417U
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electrically connected
resistance
relay
micro
input terminal
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唐琪
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Guangdong Power Grid Co Ltd
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Guangdong Power Grid Co Ltd
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Abstract

The utility model discloses a kind of Partial discharge signal simulators with temperature measurement and overvoltage protection, including micro-chip processor, signal generator, drive amplification circuit, constant pressure source, charging resistor, discharge resistance, the first relay, the second relay, first capacitor, temperature detecting module, Zenith tracking module and third relay.The beneficial effects of the utility model 1, the internal temperature that detection device is used for temperature detecting module, ensure the product safety of Partial discharge signal simulator, extend life of product；2, since the element in temperature detecting module belongs to low cost low-power consumption element, it is possible to be integrated on the circuit board of very little, not impacted substantially to the volume of device, cost payout is also very low；3, have the function of Zenith tracking, can effectively prevent since Partial discharge signal overtension two causes subsequent conditioning circuit to damage.

Description

A kind of Partial discharge signal simulator with temperature measurement and overvoltage protection
Technical field
The utility model relates to voltage diagnostic device fields, more particularly, to a kind of office with temperature measurement function 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.
Partial discharge signal simulator is had developed regarding to the issue above, the superfrequency part of the device analog high voltage amplitude Electric discharge, for detecting whether GIS partial discharge test sensor can work normally.However, due to existing Partial discharge signal simulator There are a large amount of high voltage devices for inside, and capacitor charging loop current is larger, so being easy to cause fever phenomenon.Meanwhile Due to inside constant pressure source be possible to that peak overvoltage signal can be generated, internal electronic component is formed and is destroyed.
Utility model content
The utility model overcomes the fever of existing GIS partial discharge tester and haves the defects that overvoltage, provides one kind The new Partial discharge signal simulator with temperature measurement and overvoltage protection.The utility model is by utilizing temperature detecting module It realizes to the temperature detection inside device, the problem of effectively realizing to device monitoring internal temperature；There is overvoltage inspection simultaneously Brake can effectively prevent since 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 Partial discharge signal simulator with temperature measurement and overvoltage protection, including micro-chip processor, signal hair Raw device, drive amplification circuit, constant pressure source, charging resistor, discharge resistance, the first relay, the second relay, first capacitor, temperature Spend detection module, Zenith tracking module and third relay, wherein
Temperature detecting module is used to detect the internal temperature of Partial discharge signal simulator, and relevant data is transferred to micro- Handle chip；
First output end of micro-chip processor is electrically connected with the input terminal of signal generator；
The second output terminal of micro-chip processor is electrically connected with the control terminal of third relay；
The output end of signal generator is electrically connected with the input terminal of driving circuit；
The output end of drive amplification circuit is electrically connected with the control terminal of the first relay；
The output end of 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；
First relay is normally off, and the second relay is normally open；
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 micro-chip processor；
The other end of charging resistor is electrically connected with one end of the switch-side of the first relay；
The other end of the switch-side of first relay is electrically connected with one end of first capacitor；
The other end of 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 the switch-side of second relay is electrically connected with one end of discharge resistance；
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；
The other end of discharge resistance is grounded.
Utility model works process is as follows:
Square-wave signal is exported by micro-chip processor control signal generator, power amplification is carried out by drive amplification circuit After control the first relay and the second relay is cut-off, due to the work-based logic phase of the first relay and the second relay Instead, therefore when the first relay is closed, and the second relay disconnects, constant pressure source is charged by charging resistor to capacitor；When First relay disconnects, and when the second relay is closed, the capacitor after charging discharge by discharge resistance, thus simulation one The generating process of a shelf depreciation, tests sensor.Meanwhile temperature is carried out to device inside by temperature detecting module Detection, micro-chip processor obtain the temperature data inside about device by the data of analysis temperature detecting module.Meanwhile it is logical Zenith tracking module detects the output voltage of constant pressure source, will test result and is sent to micro-chip processor.Work as micro process When the output voltage that chip detects constant pressure source exceeds threshold value, control third relay is disconnected, and cuts off the power end of constant pressure source, is realized Overvoltage protection.
In a preferred solution, the temperature detecting module include thermistor, first resistor, second resistance, 3rd resistor, the second capacitor, third capacitor, wherein
The third output end of micro-chip processor is electrically connected with one end of thermistor；
The third output end of micro-chip processor is electrically connected with one end of first resistor；
The first input end of micro-chip processor is electrically connected with the other end of first resistor；
The other end of second resistance is electrically connected with one end of the second capacitor；
The other end of second capacitor is grounded；
The other end of thermistor is electrically connected with one end of second resistance；
The other end of second resistance is electrically connected with the second input terminal of micro-chip processor；
The other end of second resistance is electrically connected with one end of third capacitor；
The other end of third capacitor is grounded；
The other end of thermistor is electrically connected with the 5th output end of micro-chip processor, the 5th output end of micro-chip processor Export positive voltage；
The other end of thermistor is electrically connected with one end of 3rd resistor；
The other end of 3rd resistor is electrically connected with the 4th output end of micro-chip processor, the 4th output end of micro-chip processor Export negative voltage.
In this preferred embodiment, the third output end of micro-chip processor exports positive voltage, the 4th output end of micro-chip processor Negative voltage is exported, the third output end of micro-chip processor, the 4th output end of micro-chip processor and 3rd resistor composition shunt back Road, to determine that the second output terminal of micro-chip processor enters the electric current of the first input end of micro-chip processor.Micro-chip processor First input end and the second input terminal of micro-chip processor be electrically connected respectively with the both ends of thermistor, micro-chip processor according to The voltage of second input end measuring thermistor of the first input end and micro-chip processor of micro-chip processor, thus obtain about The resistance value of thermistor obtains the temperature inside device indirectly.
In a preferred solution, voltage detection module includes the 4th resistance, the 5th resistance, the 6th resistance, the 7th electricity Resistance, the 8th resistance, the 9th resistance, the first operational amplifier and low-pass filter circuit, wherein
The one of input terminal of the one end of 4th resistance as voltage detection module, the other end of the 4th resistance and the 5th resistance End electrical connection；
The other end of 5th resistance is grounded；
One end of 4th resistance is electrically connected with one end of the 6th resistance；
The other end of 4th resistance is electrically connected with one end of the 7th resistance；
The other end of 6th resistance is electrically connected with the non-inverting input terminal of the first operational amplifier；
The other end of 7th resistance is electrically connected with the inverting input terminal of the first operational amplifier；
The other end of 6th resistance is electrically connected with one end of the 8th resistance；
The other end of 7th resistance is electrically connected with one end of the 9th resistance；
The other end of 8th resistance is grounded；
The other end of 9th 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.
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 low-pass filter circuit, the other end of inductance is as low-pass filter circuit Output end；
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.
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 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.
In a preferred solution, the drive amplification circuit includes the tenth resistance, eleventh resistor, the 12nd electricity Resistance, first diode, the second diode, NPN triode, the first PNP triode, wherein
Input terminal of the cathode of first diode as drive amplification circuit, the anode of first diode and the 5th resistance One end electrical connection；
The other end of eleventh resistor is electrically connected with the ground level of NPN triode；
The other end of eleventh resistor is electrically connected with one end of the tenth resistance；
Another termination positive supply of tenth resistance；
The collector of NPN triode connects positive supply；
The emitter of NPN triode is electrically connected with the emitter of the first PNP triode, the emitter conduct of NPN triode The output end of drive amplification 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 the first PNP triode；
The cathode of second diode is electrically connected with one end of the tenth resistance；
Another termination negative supply of 4th resistance；
The collector of first PNP triode connects negative supply.
In this preferred embodiment, drive amplification circuit is for improving output power.
In a preferred solution, the Partial discharge signal simulator further includes display module, the display mould The input terminal of block is electrically connected with the 6th output end of micro-chip processor.
In this preferred embodiment, phase of the display module for the output voltage of temperature information and constant pressure source inside display device Close information.
In a preferred solution, Partial discharge signal simulator further includes data storage, the input of data storage End is electrically connected with the 7th output end of micro-chip processor.
In this preferred embodiment, data storage is used for the output voltage of temperature information and constant pressure source inside storage device Relevant information.
In a preferred solution, Partial discharge signal simulator further includes wireless communication module, wireless communication module Input terminal is electrically connected with the 8th output end of micro-chip processor.
In this preferred embodiment, wireless communication module be used for by the temperature information inside device be sent to a distant place system or On the handheld terminal of staff.
In a preferred solution, first capacitor is high frequency ceramic disc capacitor.
In a preferred solution, Partial discharge signal simulator further includes temperature feedback module, and temperature feedback module is used When detecting the internal temperature of Partial discharge signal simulator when temperature detecting module beyond threshold value, negative-feedback is carried out to device, Realize the protection to Partial discharge signal simulator.
In a preferred solution, temperature feedback module include the 4th relay, thirteenth resistor, the 14th resistance, 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, the 19th resistance, the first filter capacitor, the second filtering Capacitor, third filter capacitor, the 4th filter capacitor, second operational amplifier, Current Voltage conversion module, the second PNP triode, Magnetic bead and linear regulator, wherein
9th output end of micro-chip processor is electrically connected with one end of thirteenth resistor；
The other end of thirteenth resistor is electrically connected with one end of the 14th resistance；
Tenth output end of micro-chip processor is electrically connected with one end of the 15th resistance；
The other end of 15th resistance is electrically connected with one end of the first filter capacitor；
The other end of first filter capacitor is grounded；
The other end of 15th resistance is electrically connected with one end of the 16th resistance；
The other end of 16th resistance is electrically connected with one end of the second filter capacitor；
The other end of second filter capacitor is grounded；
The other end of 16th resistance is electrically connected with one end of the 17th resistance；
The other end of 17th resistance is electrically connected with one end of third filter capacitor；
The other end of third filter capacitor is grounded；
The other end of 17th resistance is electrically connected with the inverting input terminal of second operational amplifier；
The other end of thirteenth resistor is electrically connected with the non-inverting input terminal of second operational amplifier；
The other end of 14th resistance is electrically connected with one end of the 19th resistance；
The power input of second operational amplifier connects digital power；
The output end of second operational amplifier is electrically connected with one end of the 18th resistance；
The other end of 18th resistance is electrically connected with the ground level of the second PNP triode；
The emitting stage of second PNP triode is grounded；
The emitting stage of second PNP triode is electrically connected with the other end of the 19th resistance；
The current collection grade of second PNP triode is electrically connected with the first input end of Current Voltage conversion module；
The other end of 14th resistance is electrically connected with the second input terminal of Current Voltage conversion module；
The first input end of Current Voltage conversion module is electrically connected with the input terminal of linear regulator；
The output end of linear regulator is as digital power, one end of the output end of linear regulator and the 4th filter capacitor Electrical connection；
The other end of 4th filter capacitor is grounded；
The output end of linear regulator is electrically connected with one end of magnetic bead；
The other end of magnetic bead is as analog power；
The analog power port of micro-chip processor is electrically connected with the other end of magnetic bead；
11st output end of micro-chip processor is electrically connected with the control terminal of the 4th relay；
One end of the switch-side of 4th relay is electrically connected with mobile power source；
The other end of the switch-side of 4th relay is electrically connected with the analog power port of micro-chip processor.
In this preferred embodiment, it is the 6th defeated to modulate micro-chip processor by the data of temperature detecting module for micro-chip processor The signal pulsewidth of outlet, so as to adjust the voltage value of the tenth resistance.The output signal of tenth output end of micro-chip processor is passed through Three rank RC filter circuits (by the 15th resistance, the 16th resistance, the 17th resistance, the first filter capacitor, the second filter capacitor, Third filter capacitor forms three rank RC filter circuits) after be input to the inverting input terminal of second operational amplifier, micro-chip processor The output signal of the 9th output end be input to the non-inverting input terminal of second operational amplifier as comparison voltage, then output letter Number by the transistor amplifier that is made of the second PNP triode, transistor amplifier input current voltage transformation module First input end.Then it powers by Current Voltage conversion module to linear regulator.Mould when due to micro-chip processor starting Quasi- power supply is powered by mobile power source, and lithium battery is powered by the 4th relay (normally off) to micro-chip processor.Then micro- place The temperature of chip judgement thermistor is managed whether in normal range (NR), by the tenth output of micro-chip processor if in normal range (NR) End control linear regulator is powered to micro-chip processor, while giving the 4th relay by the 11st output end of micro-chip processor It is powered, disconnects the switch-side of the 4th relay, disconnect power supply of the mobile power source to micro-chip processor.
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.
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, it is used for the internal temperature of detection device with temperature detecting module, ensures the product peace of Partial discharge signal simulator Entirely, extend life of product；
3, since the element in temperature detecting module belongs to low cost low-power consumption element, it is possible to be integrated in very little On circuit board, to just not impacting substantially in the volume of device, cost payout is also very low；
4, 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 Partial discharge signal simulator with temperature measurement and overvoltage protection, including it is enhanced STM32 chip, ICL8038, drive amplification circuit, constant pressure source, charging resistor, discharge resistance, the first 5V relay, the 2nd 5V after Electric appliance, third relay, the 4th relay, high frequency ceramic disc capacitor, temperature detecting module, LCD display, TF card and 2G communicate mould Block, wherein
Temperature detecting module is used to detect the internal temperature of Partial discharge signal simulator, and relevant data are transferred to increasing Strong type STM32 chip；
First output end of enhanced STM32 chip is electrically connected with the input terminal of ICL8038；
The output end of ICL8038 is electrically connected with the input terminal of driving 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；
First 5V relay is normally off, and the second relay is normally open；
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 first input end of enhanced STM32 chip；
The other end of charging resistor is electrically connected with one end of the switch-side of the first 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；
One end of the switch-side of 3rd 5V relay connects power supply；
The other end of switch-side of 3rd 5V relay is electrically connected with the input terminal of constant pressure source；
The other end of discharge resistance is grounded；
The input terminal of LCD display is electrically connected with the second output terminal of enhanced STM32 chip.
The input terminal of TF card is electrically connected with the third output end of enhanced STM32 chip；
The input terminal of 2G communication module is electrically connected with the 4th output end of enhanced STM32 chip；
5th output end of enhanced STM32 chip is electrically connected with the control terminal of third relay；
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, temperature detecting module includes thermistor, first resistor, second resistance, 3rd resistor, the second capacitor, Three capacitors, wherein
6th output end of enhanced STM32 chip is electrically connected with one end of thermistor；
6th output end of enhanced STM32 chip is electrically connected with one end of first resistor；
Second input terminal of enhanced STM32 chip is electrically connected with the other end of first resistor；
The other end of second resistance is electrically connected with one end of the second capacitor；
The other end of second capacitor is grounded；
The other end of thermistor is electrically connected with one end of second resistance；
The third input terminal of the other end of second resistance and enhanced STM32 chip；
The other end of second resistance is electrically connected with one end of third capacitor；
The other end of third capacitor is grounded；
The other end of thermistor is electrically connected with the 8th output end of enhanced STM32 chip, enhanced STM32 chip 8th output end exports positive voltage；
The other end of thermistor is electrically connected with one end of 3rd resistor；
The other end of 3rd resistor is electrically connected with the 7th output end of enhanced STM32 chip, enhanced STM32 chip 7th output end exports negative voltage.
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, voltage detection module includes the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the Nine resistance, the first operational amplifier and low-pass filter circuit, wherein
The one of input terminal of the one end of 4th resistance as voltage detection module, the other end of the 4th resistance and the 5th resistance End electrical connection；
The other end of 5th resistance is grounded；
One end of 4th resistance is electrically connected with one end of the 6th resistance；
The other end of 4th resistance is electrically connected with one end of the 7th resistance；
The other end of 6th resistance is electrically connected with the non-inverting input terminal of the first operational amplifier；
The other end of 7th resistance is electrically connected with the inverting input terminal of the first operational amplifier；
The other end of 6th resistance is electrically connected with one end of the 8th resistance；
The other end of 7th resistance is electrically connected with one end of the 9th resistance；
The other end of 8th resistance is grounded；
The other end of 9th 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 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 low-pass filter circuit, output of the other end of inductance as low-pass filter circuit End；
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 tenth resistance, eleventh resistor, twelfth resistor, 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 5th resistance One end electrical connection；
The other end of eleventh resistor is electrically connected with the ground level of NPN triode；
The other end of eleventh resistor is electrically connected with one end of the tenth resistance；
Another termination positive supply of tenth 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 tenth resistance；
Another termination negative supply of 4th resistance；
The collector of PNP triode connects negative supply.
The present embodiment course of work:
Square-wave signal is exported by enhanced STM32 chip controls ICL8038, power is carried out by drive amplification circuit and is put The first 5V relay of control and the 2nd 5V relay are cut-off after big.Due to the work of the first 5V relay and the 2nd 5V relay Make logic on the contrary, constant pressure source is by charging resistor to capacitor therefore when the first 5V relay is closed, and the 2nd 5V relay disconnects It charges；When the first 5V relay disconnects, and the 2nd 5V relay is closed, the capacitor after charging is put by discharge resistance Electricity, so that the generating process of one shelf depreciation of simulation, tests sensor.Meanwhile by temperature detecting module to dress Internal implementation temperature detection is set, enhanced STM32 chip is obtained by the data of analysis temperature detecting module about inside device Temperature data.LCD display is for the temperature information inside display device, and TF card is for the temperature letter inside storage device Breath, 2G communication module are used to for the temperature information inside device being sent to the handheld terminal of the staff in a distant place.Meanwhile it is logical Zenith tracking module detects the output voltage of constant pressure source, will test result and is sent to enhanced STM32 chip.Work as increasing When the output voltage that strong type STM32 chip detects constant pressure source exceeds threshold value, control third relay is disconnected, and cuts off the electricity of constant pressure source 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 (9)

1. a kind of Partial discharge signal simulator with temperature measurement and overvoltage protection, which is characterized in that including micro process core Piece, signal generator, drive amplification circuit, constant pressure source, charging resistor, discharge resistance, the first relay, the second relay, One capacitor, temperature detecting module, Zenith tracking module and third relay, wherein
The temperature detecting module is used to detect the internal temperature of Partial discharge signal simulator, and relevant data are transferred to Micro-chip processor；
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 driving 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；
First relay is normally off, and the second relay is normally open；
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 first 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；
The temperature detecting module includes thermistor, first resistor, second resistance, 3rd resistor, the second capacitor, third electricity Hold, wherein
The third output end of the micro-chip processor is electrically connected with one end of thermistor；
The third output end of the micro-chip processor is electrically connected with one end of first resistor；
The first input end of the micro-chip processor is electrically connected with the other end of first resistor；
The other end of the second resistance is electrically connected with one end of the second capacitor；
The other end of second capacitor is grounded；
The other end of the thermistor is electrically connected with one end of second resistance；
The other end of the second resistance is electrically connected with the second input terminal of micro-chip processor；
The other end of the second resistance is electrically connected with one end of third capacitor；
The other end of the third capacitor is grounded；
The other end of the thermistor is electrically connected with the 5th output end of micro-chip processor, the 5th output of micro-chip processor End output positive voltage；
The other end of the thermistor is electrically connected with one end of 3rd resistor；
The other end of the 3rd resistor is electrically connected with the 4th output end of micro-chip processor, the 4th output of micro-chip processor End output negative voltage.
2. Partial discharge signal simulator according to claim 1, which is characterized in that the voltage detection module includes the Four resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the first operational amplifier and low-pass filtering Circuit, wherein
Input terminal of the one end of 4th resistance as voltage detection module, the other end of the 4th resistance and the 5th resistance One end electrical connection；
The other end of 5th resistance is grounded；
One end of 4th resistance is electrically connected with one end of the 6th resistance；
The other end of 4th resistance is electrically connected with one end of the 7th resistance；
The other end of 6th resistance is electrically connected with the non-inverting input terminal of the first operational amplifier；
The other end of 7th resistance is electrically connected with the inverting input terminal of the first operational amplifier；
The other end of 6th resistance is electrically connected with one end of the 8th resistance；
The other end of 7th resistance is electrically connected with one end of the 9th resistance；
The other end of 8th resistance is grounded；
The other end of 9th 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. Partial discharge signal simulator according to claim 2, which is characterized in that the low-pass filter circuit includes the One tunable capacitor, the second tunable capacitor, third tunable capacitor, inductance, wherein
Input terminal of the one end of the inductance as low-pass filter circuit, the other end of inductance is as the defeated of low-pass filter circuit Outlet；
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. Partial discharge signal simulator according to claim 2 or 3, which is characterized in that the constant pressure source includes same phase Scaling 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. Partial discharge signal simulator according to claim 4, which is characterized in that the drive amplification circuit includes the Ten resistance, eleventh resistor, twelfth resistor, 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 5th resistance One end electrical connection；
The other end of the eleventh resistor is electrically connected with the ground level of NPN triode；
The other end of the eleventh resistor is electrically connected with one end of the tenth resistance；
Another termination positive supply of tenth 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 tenth resistance；
Another termination negative supply of 4th resistance；
The collector of the PNP triode connects negative supply.
6. according to claim 1, Partial discharge signal simulator described in 2,3 or 5, which is characterized in that the Partial discharge signal mould Quasi- device further includes display module, and the input terminal of the display module is electrically connected with the 6th output end of micro-chip processor.
7. Partial discharge signal simulator according to claim 6, which is characterized in that the Partial discharge signal simulator is also Including data storage, the input terminal of the data storage is electrically connected with the 7th output end of micro-chip processor.
8. according to claim 1, Partial discharge signal simulator described in 2,3,5 or 7, which is characterized in that the Partial discharge signal Simulator further includes wireless communication module, the input terminal of the wireless communication module and the 8th output end of micro-chip processor Electrical connection.
9. Partial discharge signal simulator according to claim 8, which is characterized in that the first capacitor is high frequency tile Capacitor.
CN201821033868.1U 2018-07-02 2018-07-02 A kind of Partial discharge signal simulator with temperature measurement and overvoltage protection Active CN208636417U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821033868.1U CN208636417U (en) 2018-07-02 2018-07-02 A kind of Partial discharge signal simulator with temperature measurement and overvoltage protection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821033868.1U CN208636417U (en) 2018-07-02 2018-07-02 A kind of Partial discharge signal simulator with temperature measurement and overvoltage protection

Publications (1)

Publication Number Publication Date
CN208636417U true CN208636417U (en) 2019-03-22

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Country Link
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