CN208384080U - A kind of experimental rig suitable for measuring arc voltage - Google Patents
A kind of experimental rig suitable for measuring arc voltage Download PDFInfo
- Publication number
- CN208384080U CN208384080U CN201820959460.0U CN201820959460U CN208384080U CN 208384080 U CN208384080 U CN 208384080U CN 201820959460 U CN201820959460 U CN 201820959460U CN 208384080 U CN208384080 U CN 208384080U
- Authority
- CN
- China
- Prior art keywords
- resistance
- capacitor
- circuit
- connection
- input terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The experimental rig that the utility model proposes a kind of suitable for measuring arc voltage, the input terminal of first divider of device, the input terminal of the second divider connect arc generating device with the input terminal of current transformer；The output end of the output end of first divider and the second divider connects the input terminal that arc voltage extracts circuit；Output end, the arc voltage of current transformer extract the input terminal of the output end connection signal conditioning circuit of circuit；The input terminal of the output end connection A/D signal conversion circuit of signal conditioning circuit；Output end, the power-switching circuit connection DSP of A/D signal conversion circuit control the input terminal of chip；The output end of DSP control chip sends and receives the input terminal of circuit connection computer by signal.This experimental rig structure is simple, easy to operate, can be tested with the signal of real-time measurement drop-out current and arc voltage waveform.
Description
Technical field
The utility model belongs to technical field of electric power system control, and in particular to a kind of examination suitable for measuring arc voltage
Experiment device.
Background technique
High-voltage circuitbreaker is power plant, most important control and protection equipment in electric substation, is as insulation and arc extinguishing
Device.When normal operation, according to the needs of Operation of Electric Systems, by part or all of electrical equipment and part or all of line
Road investment or out of service, plays control action.When a certain section failure of electric system, it is filled with protective device, automatically
It sets and matches, faulty component is cut off rapidly from system, reduce scope of power outage, prevent fault spread, it is all kinds of in protection system
Electrical equipment is not damaged, guarantees the safe operation of system no failure part, shields.High-voltage circuitbreaker is in the power system
Control and protection dual role are born, the quality of state directly affects the safe operation of electric system.
The measurement of arc voltage is analysis high-voltage circuitbreaker interrupting process, the accurate effective means for calculating the arcing time.By
Lower in high-voltage circuitbreaker arc voltage, fracture both end voltage difference is larger after success drop-out current, measures difficult very big.Cause
This designs and develops out a set of high-voltage circuitbreaker arc voltage test macro, is to work as high-voltage large current actual test scene
Emphasis urgently to be solved in preceding high-voltage circuitbreaker test.It realizes the measurement of high-voltage circuitbreaker arc voltage waveform, can be open circuit
Device product design personnel provide a large amount of reference information, these information can be used as improve circuit breaker design it is direct according to
According to, and help to understand the break performance of breaker.According to the arcing time of actual measurement and drop-out current, breaker can be estimated
The electric life of product can also be used as the data source for establishing arc physics model.
With the development of smart grid, the diagnostic techniques of high-voltage circuitbreaker have become smart grid construction in one must not
The component part that can lack.Currently, the theoretical method comparative maturity, but really realization calculated about high-voltage circuitbreaker electric life
The device of on-line monitoring of electrical endurance did not had relevant report also.It thus needs to obtain various information with offline mode, pass through
Science integration analysis and calculating, grasp the present situation and life-span expectation of equipment, it is the base for realizing status of electric power maintenance
Plinth and premise.
Therefore, it is necessary to design a set of arc voltage test macro, pass through the survey to arc voltage and drop-out current waveform
Amount, so that the arcing time, which is accurately calculated, to be particularly important.
Utility model content
In view of the deficiencies of the prior art, the experimental rig that the utility model proposes a kind of suitable for measuring arc voltage.
A kind of experimental rig suitable for measuring arc voltage, including signal extraction detection unit and monitoring unit；
The signal extraction detection unit, comprising: the first divider, the second divider, current transformer, arc voltage mention
Sense circuit, signal conditioning circuit, A/D signal conversion circuit, DSP control chip and power-switching circuit；
The monitoring unit sends and receives circuit for signal；
The input terminal of first divider, the input terminal of the second divider connect electricity with the input terminal of current transformer
Arc generating device；The output end of first divider and the output end connection arc voltage of the second divider extract the defeated of circuit
Enter end；Output end, the arc voltage of the current transformer extract the input terminal of the output end connection signal conditioning circuit of circuit；
The input terminal of the output end connection A/D signal conversion circuit of the signal conditioning circuit；The output of the A/D signal conversion circuit
End, power-switching circuit connection DSP control the input terminal of chip；The output end of DSP control chip sent by signal and
Receive the input terminal of circuit connection computer.
The arc voltage extracts circuit, including first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th electricity
Resistance, the 6th resistance, first capacitor, the second capacitor, third capacitor, the 4th capacitor, first diode, the second diode and the first fortune
Calculate amplifier；
One end of the second resistance connects the Wiring port of the first divider, the other end of the second resistance and first
One end connection of the anode of diode, the cathode of the second diode, the 4th resistance, one end of the 3rd resistor connect second point
The Wiring port of depressor, the other end and the cathode of first diode, the anode of the second diode, the 5th electricity of the 3rd resistor
One end of resistance connects, and the other end of the 4th resistance, one end of first resistor are connect with the first operational amplifier cathode, described
The other end of 5th resistance, one end of the 6th resistance are connect with the first operational amplifier anode, the other end of the 6th resistance
It is connected to ground, the other end of the first resistor is connect with the output end of the first operational amplifier, first operational amplifier
Output end connection signal conditioning circuit input terminal, the upper end of first operational amplifier and positive pole, first capacitor
One end, second capacitor one end connection, the other end of the first capacitor, the second capacitor the other end be connected to ground, described first
The lower end of operational amplifier is connect with power supply source electrode, third capacitor one end, the 4th capacitor one end, the third capacitor it is another
It holds, the other end of the 4th capacitor is connected to ground.
The signal conditioning circuit, including the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11st electricity
Resistance, the 5th capacitor, the 6th capacitor, the 7th capacitor, second operational amplifier；
One end of 5th capacitor is connect with signal input part, one end of the 5th the capacitor other end and the 9th resistance
Connection, the other end of the 9th resistance and second operational amplifier cathode, the upper end of second operational amplifier, first can power transformation
One end of resistance connects, and one end of the 7th resistance connects to power supply, and the one of the other end of the 7th resistance and the 8th resistance
End, the connection of second operational amplifier anode, the other end of the 8th resistance is connected to ground, under the second operational amplifier
End connects to power supply, and the second operational amplifier output end is connect with one end of the other end of the tenth resistance, eleventh resistor,
The other end of the eleventh resistor is connect with signal output end, one end of the 6th capacitor, one end of the 7th capacitor and electricity
Source connection, the other end of the 6th capacitor, the other end of the 7th capacitor are connected to ground.
The utility model has the beneficial effects that
The experimental rig that the utility model proposes a kind of suitable for measuring arc voltage, with existing to drop-out current and electricity
Arc voltage separately carries out test and compares, this experimental rig structure is simple, easy to operate, and can with real-time measurement drop-out current and
The signal of arc voltage waveform is tested.It is relatively simple to the signal detection of electrical quantity first in this test, pass through partial pressure
Device and current transformer detect arc voltage and drop-out current, are then transmitted signals to using signal-testing apparatus
DSP is controlled in chip；It followed by operates fairly simple, only electrical quantity need to be carried out having detected through signal-testing apparatus by signal
It is sent in DSP, recycles the software of DSP to operate and judgement measurement is carried out to arc voltage, its signal is then sent to calculating
It is shown in machine and in the display；It is finally that can improve accuracy with synchro measure arc voltage and drop-out current.
Detailed description of the invention
Fig. 1 is the structural block diagram for being suitable for measuring the experimental rig of arc voltage in specific embodiment of the present invention；
Fig. 2 is the circuit diagram that arc voltage extracts circuit in specific embodiment of the present invention；
Fig. 3 is the circuit diagram of signal conditioning circuit in specific embodiment of the present invention；
Fig. 4 is the connection circuit that A/D signal conversion circuit and DSP control chip in specific embodiment of the present invention
Figure；
Fig. 5 is the circuit diagram that signal sends and receives circuit in specific embodiment of the present invention；
Fig. 6 is the circuit diagram of power-switching circuit in specific embodiment of the present invention；
Fig. 7 is the circuit diagram that DSP controls the data storage circuit in chip in specific embodiment of the present invention.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe.
A kind of experimental rig suitable for measuring arc voltage, as shown in Figure 1, including signal extraction detection unit and monitoring
Unit；
The signal extraction detection unit, comprising: the first divider, the second divider, current transformer, arc voltage mention
Sense circuit, signal conditioning circuit, A/D signal conversion circuit, DSP control chip and power-switching circuit；
The monitoring unit sends and receives circuit for signal；
The input terminal of first divider, the input terminal of the second divider connect electricity with the input terminal of current transformer
Arc generating device；The output end of first divider and the output end connection arc voltage of the second divider extract the defeated of circuit
Enter end；Output end, the arc voltage of the current transformer extract the input terminal of the output end connection signal conditioning circuit of circuit；
The input terminal of the output end connection A/D signal conversion circuit of the signal conditioning circuit；The output of the A/D signal conversion circuit
End, power-switching circuit connection DSP control the input terminal of chip；The output end of DSP control chip sent by signal and
Receive the input terminal of circuit connection computer.
The arc voltage extracts circuit, as shown in Fig. 2, including first resistor R1, second resistance R2, 3rd resistor R3、
4th resistance R4, the 5th resistance R5, the 6th resistance R6, first capacitor C1, the second capacitor C2, third capacitor C3, the 4th capacitor C4,
One diode D1, the second diode D2, the first operational amplifier A1；
The second resistance R2One end connect the first divider Wiring port J1, the second resistance R2The other end
With first diode D1Anode, the second diode D2Cathode, the 4th resistance R4One end connection, the 3rd resistor R3's
One end connects the Wiring port J2, the 3rd resistor R of the second divider3The other end and first diode D1Cathode, second
Diode D2Anode, the 5th resistance R5One end connection, the 4th resistance R4The other end, first resistor R1One end with
First operational amplifier A1Cathode connection, the 5th resistance R5The other end, the 6th resistance R6One end and the first operation amplifier
Device A1Anode connection, the 6th resistance R6The other end be connected to ground, the first resistor R1The other end put with the first operation
Big device A1Output end connection, the first operational amplifier A1Output end connection signal conditioning circuit input terminal, described
One operational amplifier A1Upper end and positive pole, first capacitor C1One end, the second capacitor C2One end connection, the first capacitor
C1The other end, the second capacitor C2The other end be connected to ground, the first operational amplifier A1Lower end and power supply source electrode, the
Three capacitor C3One end, the 4th capacitor C4One end connection, the third capacitor C3The other end, the 4th capacitor C4The other end and ground
Connection.
The signal conditioning circuit, as shown in figure 3, including the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth
Resistance R10, eleventh resistor R11, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, second operational amplifier A2；
The 5th capacitor C5One end is connect with signal input part, the 5th capacitor C5The other end and the 9th resistance R9's
One end connection, the 9th resistance R9The other end and second operational amplifier A2Cathode, second operational amplifier A2Upper end,
First variable resistance R10One end, downlink connection, the 7th resistance R7One end connect to power supply, the 7th resistance R7It is another
One end and the 8th resistance R8One end, second operational amplifier A2Anode connection, the 8th resistance R8The other end and ground even
It connects, the second operational amplifier A2Lower end connect to power supply, the second operational amplifier A2Output end and the tenth resistance
R10The other end, eleventh resistor R11One end connection, the eleventh resistor R11The other end connect with signal output end,
The 6th capacitor C6One end, the 7th capacitor C7One end connect to power supply, the 6th capacitor C6The other end, the 7th electricity
Hold C7The other end be connected to ground.
In present embodiment, the A/D signal conversion circuit output end is connect with the input interface of DSP control chip,
As shown in figure 4, model TMS320F2812, the A/D signal conversion circuit that DSP control chip uses uses AD7656, AD7656
With the interface circuit figure of TMS320F2812, VDR, RST, CON [ABC], RD, CS, BUSY pin of AD7656 is separately connected
DVDD, ADC_RST, PWM1, RE, IS, INT1_BIO pin of TMS320F2812, D [0]~D [15] pin connection of AD7656
D0~D15 pin of TMS320F2812, the V of the DGND pin connection TMS320F2812 of AD7656SSPin is simultaneously grounded, AD7656
WR, STDBY pin be connected with+3.3V power supply, H/SSEL, SER, RANGE, W/B pin of AD7656 is connected and is grounded.
The signal sends and receives circuit, as shown in Figure 5: including the 8th capacitor C8, the 9th capacitor C9, the tenth capacitor
C10, the 11st capacitor C11, the 12nd capacitor C12, communication chip MAX232, Wiring port J3.
The first pin and the 8th capacitor C of the communication chip MAX2328One end connection, the 8th capacitor C8It is another
One end is connect with the third pin of communication chip MAX232, the second pin and the 9th capacitor C of the communication chip MAX2329's
One end connection, the 9th capacitor C9The other end connect to power supply, the 4th pin and the tenth of the communication chip MAX232
Capacitor C10One end connection, the tenth capacitor C10The other end connect with the 5th pin of communication chip MAX232, it is described logical
Interrogate the 6th pin and the 11st capacitor C of chip MAX23211One end connection, the 11st capacitor C11The other end and ground
Connection, the 16th pin and power supply, the 12nd capacitor C of the communication chip MAX23212One end connection, it is described 12nd electricity
Hold C12The other end be connected to ground, the 15th pin of the communication chip MAX232 is connected to ground, the communication chip
The 13rd pin, 14 pins of MAX232 are connect with the third pin of Wiring port, second pin respectively, the line end mouth
Pin is connected to ground.
The power-switching circuit, as shown in Figure 6: including the 13rd capacitor C13, the 14th capacitor C14, the 15th electricity
Hold C15, battery, chip LM7508, switch P1, connector BNC connector.
One end of first pin of battery and switch, BNC connector one end connection, the battery second pin with
The other end of BNC connector, the 13rd capacitor C13One end, chip LM7508 third pin, the 14th capacitor C14One end,
15th capacitor C15One end, connect, the other end of the switch and the 13rd capacitor C13The other end, 12V power supply, core
The first pin of piece LM7508 connects, the third pin and power supply, the 14th capacitor C of chip LM750814The other end, the 15th
Capacitor C15The other end connection.
Data storage circuit in the DSP control chip, as shown in Figure 7: including chip 24C04, twelfth resistor
R12, thirteenth resistor R13, the 16th capacitor C16。
The first pin, second pin, third pin, the 4th pin of the chip 24C04 is connected to ground, the chip
The 16th pin and power supply, the 16th capacitor C of 24C0416One end, twelfth resistor R12One end, thirteenth resistor R13's
One end connection, the 16th capacitor C16The other end be connected to ground, the 15th pin of the chip 24C04 is connected to ground,
The 13rd pin and twelfth resistor R of the chip 24C0412The other end connection, the 14th pin of the chip 24C04
With thirteenth resistor R13The other end connection.
Using the above-mentioned method for being suitable for measuring the experimental rig of arc voltage and being tested, including following procedure:
The arc voltage in arc generating device is measured using the first divider and the second divider, using electric current
Mutual inductor measures the drop-out current of breaker in arc generating device；
The arc voltage of the arc generating device of acquisition and drop-out current signal are transmitted to A/D by signal conditioning circuit
Signal conversion circuit；Arc voltage is converted into digital signal by A/D signal conversion circuit, and is transmitted to DSP control chip；
It initializes DSP and controls chip, DSP control each port of chip is configured, judges whether arc generating device produces
Arc voltage has been given birth to, has believed the drop-out current of arc generating device if so, DSP controls chip controls A/D signal conversion circuit
Number its be converted to digital signal, and be sent to DSP control and chip and store；Chip is controlled using DSP to send and connect by signal
It receives circuit and arc voltage and drop-out current signal is sent to computer, and shown on the liquid crystal display of computer, obtained
Otherwise real-time data monitoring continues to judge.
Claims (3)
1. a kind of experimental rig suitable for measuring arc voltage, which is characterized in that including signal extraction detection unit and monitoring
Unit；
The signal extraction detection unit, comprising: the first divider, the second divider, current transformer, arc voltage extract electricity
Road, signal conditioning circuit, A/D signal conversion circuit, DSP control chip and power-switching circuit；
The monitoring unit sends and receives circuit for signal；
Input terminal, the input terminal of the second divider of first divider connect electric arc hair with the input terminal of current transformer
Generating apparatus；The output end of first divider and the output end connection arc voltage of the second divider extract the input of circuit
End；Output end, the arc voltage of the current transformer extract the input terminal of the output end connection signal conditioning circuit of circuit；Institute
State the input terminal of the output end connection A/D signal conversion circuit of signal conditioning circuit；The output of the A/D signal conversion circuit
End, power-switching circuit connection DSP control the input terminal of chip；The output end of DSP control chip sent by signal and
Receive the input terminal of circuit connection computer.
2. the experimental rig according to claim 1 for being suitable for measuring arc voltage, which is characterized in that the electric arc electricity
Pressure extracts circuit, including first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the first electricity
Appearance, the second capacitor, third capacitor, the 4th capacitor, first diode, the second diode and the first operational amplifier；
One end of the second resistance connects the Wiring port of the first divider, the other end of the second resistance and the one or two pole
One end connection of the anode of pipe, the cathode of the second diode, the 4th resistance, one end of the 3rd resistor connect the second divider
Wiring port, the other end and the cathode of first diode of the 3rd resistor, the anode of the second diode, the 5th resistance
One end connection, the other end of the 4th resistance, one end of first resistor are connect with the first operational amplifier cathode, and the described 5th
The other end of resistance, the 6th resistance one end connect with the first operational amplifier anode, the other end of the 6th resistance and ground
Connection, the other end of the first resistor connect with the output end of the first operational amplifier, first operational amplifier it is defeated
The input terminal of outlet connection signal conditioning circuit, the upper end of first operational amplifier and positive pole, first capacitor one end,
Second capacitor one end connection, the other end of the first capacitor, the second capacitor the other end be connected to ground, first operation is put
The lower end of big device is connect with power supply source electrode, third capacitor one end, the 4th capacitor one end, the other end of the third capacitor, the 4th
The other end of capacitor is connected to ground.
3. the experimental rig according to claim 1 for being suitable for measuring arc voltage, which is characterized in that the signal tune
Manage circuit, including the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, eleventh resistor, the 5th capacitor, the 6th capacitor,
7th capacitor, second operational amplifier；
One end of 5th capacitor is connect with signal input part, and one end of the 5th capacitor other end and the 9th resistance connects
It connects, the other end and second operational amplifier cathode, the upper end of second operational amplifier, the first variable resistance of the 9th resistance
One end connection, one end of the 7th resistance connects to power supply, one end of the other end of the 7th resistance and the 8th resistance,
The connection of second operational amplifier anode, the other end of the 8th resistance are connected to ground, the lower end of the second operational amplifier
It connects to power supply, the second operational amplifier output end is connect with one end of the other end of the tenth resistance, eleventh resistor, institute
The other end for stating eleventh resistor is connect with signal output end, one end of the 6th capacitor, one end of the 7th capacitor and power supply
Connection, the other end of the 6th capacitor, the other end of the 7th capacitor are connected to ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820959460.0U CN208384080U (en) | 2018-06-21 | 2018-06-21 | A kind of experimental rig suitable for measuring arc voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820959460.0U CN208384080U (en) | 2018-06-21 | 2018-06-21 | A kind of experimental rig suitable for measuring arc voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208384080U true CN208384080U (en) | 2019-01-15 |
Family
ID=64967802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820959460.0U Active CN208384080U (en) | 2018-06-21 | 2018-06-21 | A kind of experimental rig suitable for measuring arc voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208384080U (en) |
-
2018
- 2018-06-21 CN CN201820959460.0U patent/CN208384080U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204731317U (en) | A kind of intelligentized earth resistance tester | |
| CN202126470U (en) | Power cable insulation online monitoring device | |
| CN108919002A (en) | A kind of test macro of direct-current charging post | |
| CN106443351A (en) | System and method for detecting faults of multi-core cables of ships | |
| CN207039180U (en) | A kind of iron core of transformer status monitoring and excess current control system | |
| CN109470914A (en) | A kind of VFTO signal measurement apparatus | |
| CN108459231A (en) | Based on the acquisition of cloud computing real-time running state information and Fault Quick Diagnosis method | |
| CN204374346U (en) | The pick-up unit of battery pack earth point, DC power system | |
| CN208384080U (en) | A kind of experimental rig suitable for measuring arc voltage | |
| CN105182173A (en) | Novel combined-type mutual inductor polarity tester | |
| CN207181516U (en) | A kind of sine wave all-loop self-inspection multrirange high voltage electroscope | |
| CN103245882A (en) | Integrated power failure indication and condition monitoring device | |
| CN207249937U (en) | A kind of distribution net equipment partial discharge failure actual training device | |
| CN109283437A (en) | PT broken string and singlephase earth fault simulator and method | |
| CN108732493A (en) | A kind of experimental rig and method being suitable for measuring arc voltage | |
| CN104808067B (en) | Multifunctional digital CT secondary detection instrument | |
| CN209070051U (en) | PT broken string and singlephase earth fault simulator | |
| CN111029914B (en) | Active first-aid repair system based on ubiquitous Internet of things construction | |
| CN103454536A (en) | Power transformer test method | |
| CN204758743U (en) | Low tension cable recognition device | |
| CN203941238U (en) | A kind of 35kV high-voltage bridging capacitor group dielectric loss on-line monitoring device | |
| CN210376566U (en) | Intelligent direct-current electrified electrolytic ring instrument | |
| CN208433876U (en) | A kind of generator shaft voltage, shaft current measuring device and the generating set containing it | |
| CN209642403U (en) | A kind of Intelligent warning device for distribution system | |
| CN207573068U (en) | A kind of circuit resistance tester supplies electric installation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |