CN106771907A - Low voltage equipment intellectuality power frequency withstanding voltage pilot system and method - Google Patents
Low voltage equipment intellectuality power frequency withstanding voltage pilot system and method Download PDFInfo
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- CN106771907A CN106771907A CN201611107727.5A CN201611107727A CN106771907A CN 106771907 A CN106771907 A CN 106771907A CN 201611107727 A CN201611107727 A CN 201611107727A CN 106771907 A CN106771907 A CN 106771907A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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Abstract
The invention belongs to industrial frequency withstand voltage experimental technique field, it is related to low voltage equipment intellectuality power frequency withstanding voltage pilot system and method.By experiment power supply, protection is opened, pressure regulator, choke induction, testing transformer and test product are sequentially connected and connect; display unit, voice alerting unit, IGBT driver elements and guidance panel are connected with dsp processor, and IGBT driver elements, IGBT and motor are sequentially connected；Dsp processor, isolation amplifying unit V and voltage transformer and testing transformer are sequentially connected, and dsp processor, isolation amplifying unit A and current transformer and testing transformer are sequentially connected；Printer, industrial computer, communication unit and dsp processor are sequentially connected.Realize to low-voltage direct switch experiment process centralized Control and data automatic management, connect disjunction Breaking Capacity Test inspection related to electric life etc., have the advantages that simple structure, easy to operate, good stability, high safety and intelligent level are high.
Description
Technical field
The invention belongs to industrial frequency withstand voltage experimental technique field, more particularly to a kind of low voltage equipment intellectuality power frequency tolerance
Voltage test system and method.
Background technology
The experiment of low voltage equipment power frequency withstanding voltage is applied between in normal work requiring electric isolating part to it
Certain high voltage, and certain time, the ability of transient overvoltage is tolerated with the solid insulation for verifying low voltage equipment.
Power frequency withstanding voltage experiment is important form pilot project, is also the failure after humidity test, disjunction experiment and short-circuit test
Distinguishing rule.Conventional power frequency withstanding voltage experimental rig uses contactor, the time relay, auxiliary reclay, overcurrent relay
Device etc. is constituted, and device parts are more, stability is poor, and process of the test needs artificial operation, and complex operation, security are poor, intelligent
Level is low.
The content of the invention
For above-mentioned problems of the prior art, the present invention proposes a kind of low voltage equipment intellectuality power frequency tolerance
Voltage test system and method, it is a kind of with simple structure, easy to operate, good stability, security its purpose is to provide
Strong and intelligent Low-voltage Electrical Apparatus device intelligence power frequency withstanding voltage pilot system and method.
In order to reach foregoing invention purpose, the present invention is achieved by the following technical solutions：
Low voltage equipment intellectuality power frequency withstanding voltage pilot system, including industrial computer and printer, also including experiment
Power supply, protection switch, pressure regulator, choke induction, testing transformer, test product, dsp processor, display unit, voice message list
Unit, IGBT driver elements, IGBT, motor, voltage transformer, current transformer, isolation amplifying unit V, isolation amplifying unit A,
Guidance panel and communication unit；Wherein experiment power supply is connected with protection switch, and protection switch is connected with pressure regulator, pressure regulator
It is connected with testing transformer by choke induction, testing transformer is connected with test product, display unit is connected with dsp processor
Connect, voice alerting unit is connected with dsp processor, IGBT driver elements are connected with DSP, IGBT and IGBT driver element phases
Connection, motor is connected with IGBT；Voltage transformer summation current transformer is connected with testing transformer；Isolation is amplified single
First V is connected with voltage transformer, and isolation amplifying unit A is connected with current transformer；Isolation amplifying unit V, isolation are amplified
Unit A is connected with dsp processor, and guidance panel is connected with dsp processor, industrial computer by communication unit with
Dsp processor is connected, and printer is connected with industrial computer.
The output end of the experiment power supply is connected with the input of protection switch, the output end and pressure regulator of protection switch
Power input be connected, the voltage output end of pressure regulator is connected by choke induction with the primary side of testing transformer,
The secondary side of testing transformer is connected with the power frequency withstanding voltage experiment position of test product, at the input and DSP of display unit
The signal output part for managing device is connected, and the input of voice alerting unit is connected with the signal output part of dsp processor, IGBT
The input of driver element is connected with the signal output part of DSP, and control signal input base stage and the IGBT of IGBT drive list
The drive signal output end of unit is connected, and the winding of motor is connected with the collector and emitter of IGBT；Voltage transformer
Measurement end be connected with the voltage signal output end of testing transformer, the measurement end of current transformer and the electricity of testing transformer
Stream signal output part is connected；The signal input part of isolation amplifying unit V is connected with the signal output part of voltage transformer, every
It is connected with the signal output part of current transformer from the signal input part of amplifying unit A；Isolation amplifying unit V, isolation are amplified
The signal output part of unit A is connected with the signal input part of dsp processor, at the signal output part and DSP of guidance panel
The signal input part for managing device is connected, and industrial computer is connected by communication unit with the communication signal input of dsp processor
Connect, the signal input part of printer is connected with the USB interface of industrial computer.
The test voltage of the pilot system is directly related with the nominal insulation voltage of low voltage equipment, experiment power supply
Frequency is the alternating current of 45-65Hz, and output voltage is sine wave；In order to the impedance of guarantee test power supply is far smaller than leakage electricity
Resistance, is that after testing transformer output voltage is adjusted to test voltage, its output of output terminal shortcircuit is electric to experiment power supply capacity
Stream is at least 200mA；Process of the test in order to prevent the impact of voltage, when voltage is raised since the test voltage value less than 1/2,
With the setting being stepped up in the time of about 5s.
Low voltage equipment intellectuality power frequency withstanding voltage test method, is to pass through wire before the test by pilot system
Testing transformer voltage goes out output end and is connected with the i.e. low-voltage electrical apparatus measuring point of test product, and experiment concrete operation step is as follows：
（1）System electrification, initialization, self-inspection；
（2）Guidance panel is by test voltage value and pressure Time Transmission to dsp processor；
（3）Dsp processor sends control instruction motor and drives pressure regulator life pressure, while collection voltages information, and with setting
Value compares；
（4）Applied voltage carries out voltage stabilizing operation in arranges value claimed range；
（5）Dsp processor is started counting up, and is compared in the pressure time；
（6）System reset is reset after reaching pressure-resistant time, and DSP transmission tests parameter and result of the test are gone forward side by side to industrial computer
Row storage and printing；
（7）Equipment reduction, off-test.
The low voltage equipment power frequency withstanding voltage experiment result of the test judges：Tested in whole power frequency withstanding voltage
Cheng Zhong, low voltage equipment should without internal or external insulation flashover, puncture and other any disruptive discharges occur, aura
Except electric discharge.
The current transformer and DSP connection circuits, in circuit including resistance R1, resistance R2, resistance R3, electric capacity C1,
Electric capacity C2, power supply, signal processor OPO7, wherein power supply are divided into VCC terminal ,-VCC terminal and GND terminal；Line connecting relation
It is as follows：Current feedback signal is connected by binding post 3 and electric capacity C1 after resistance R1 with signal processor OPO7, electric capacity C1
The other end be connected with the GND terminal of power supply, the binding post 2 of signal processor OPO7 is by resistance R2, resistance R3 and DSP
Signal input part and electric capacity C2 be connected, the binding post 6 of signal processor OPO7 by resistance R3 and DSP signal input
End and electric capacity C2 are connected, and the other end of electric capacity C2 is connected with the GND terminal of power supply, the binding post of signal processor OPO7
7 are connected with the VCC terminal of power supply, the binding post 4 of signal processor OPO7 and power supply-VCC terminal is connected, at signal
The binding post 1,3,5 of reason device OPO7 is hanging；The output 0-5V signals of current transformer are by current transformer and DSP wiring electricity
0-3.3V signals that DSP can recognize to the signal input part of DSP are converted into behind road.
Advantages of the present invention and beneficial effect are：
The present invention is realized to low-voltage direct switch experiment process using the powerful control of dsp processor and data-handling capacity
Centralized Control and data automatic management.The present invention combines GB/T 14048.1 2012 " low voltage switch equipment and control device "
In examination requirements, can complete to connect, the inspection of disjunction related to electric life etc. Breaking Capacity Test, with simple structure, grasp
The advantages of making convenience, good stability, high safety and intelligent level high.
The present invention will be described in detail with specific embodiment below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is low voltage equipment intellectuality power frequency withstanding voltage test system architecture figure of the present invention；
Fig. 2 is current transformer and DSP wiring diagrams in the present invention.
In figure：Experiment power supply 1, protection switch 2, the choke induction 4 of pressure regulator 3, testing transformer 5, test product 6, dsp processor
7, display unit 8, voice alerting unit 9, IGBT driver elements 10, IGBT11, motor 12, voltage transformer 13, Current Mutual Inductance
Device 14, isolates amplifying unit V15, isolates amplifying unit A16, guidance panel 17, communication unit 18, industrial computer 19, printing
Machine 20.
Specific embodiment
In order to reach foregoing invention purpose, the present invention proposes a kind of low voltage equipment intellectuality power frequency withstanding voltage experiment
System and method.Wherein.Low voltage equipment intellectuality power frequency withstanding voltage test system architecture figure as shown in Figure 1, mainly
It is single including experiment power supply 1, protection switch 2, pressure regulator 3, choke induction 4, testing transformer 5, test product 6, dsp processor 7, display
Unit 8, voice alerting unit 9, IGBT driver elements 10, IGBT11, motor 12, voltage transformer 13, current transformer 14, isolation
Amplifying unit V15, isolation amplifying unit A16, guidance panel 17, communication unit 18, industrial computer 19 and printer 20 are constituted.
Wherein the output end of experiment power supply 1 is connected with the input of protection switch 2, the output end of protection switch 2 and the electricity of pressure regulator 3
Source input is connected, and the voltage output end of pressure regulator 3 is connected by choke induction 4 with the primary side of testing transformer 5, examination
Test the secondary side of transformer 5 to be connected with the power frequency withstanding voltage experiment position of test product 6, at the input and DSP of display unit 8
The signal output part for managing device 7 is connected, and the input of voice alerting unit 9 is connected with the signal output part of dsp processor 7,
The input of IGBT driver elements 10 is connected with the signal output part of dsp processor 7, the control signal input base of IGBT11
Pole is connected with the drive signal output end of IGBT driver elements 10, the winding of motor 12 and the colelctor electrode of IGBT11 and transmitting
Pole is connected.The measurement end of voltage transformer 13 is connected with the voltage signal output end of testing transformer 5, current transformer 14
Measurement end be connected with the current signal output end of testing transformer 5.The signal input part and voltage of isolation amplifying unit V15
The signal output part of transformer 13 is connected, and the signal input part of isolation amplifying unit A16 is defeated with the signal of current transformer 14
Go out end to be connected.The signal of isolation amplifying unit V15, the signal output part of isolation amplifying unit A16 with dsp processor 7 is defeated
Enter end to be connected, the signal output part of guidance panel 17 is connected with the signal input part of dsp processor 7, industrial computer 19
It is connected with the communication signal input of dsp processor 7 by communication unit 18, signal input part and the industry of printer 20 are counted
The USB interface of calculation machine 19 is connected.
DSP （Demand-Side Platform）Digital signal processor is represented, is that one kind is particularly suitable for carrying out digital letter
Number treatment computing microprocessor.Effects of the DSP in experimental rig：1. it is used for the operation signal of acquisition operations panel, goes forward side by side
Go and process, send control of the control instruction by IGBT driver elements, IGBT realizations to motor movement, closely adjust experimental provision
Output voltage；2. receiving voltage and current signal, and the voltage and current value that computing obtains experimental rig output is carried out, to examination
Test object and bear industrial frequency withstand voltage ability and judged；3. for display unit and with voice alerting unit sending signal, display system
The parameters such as voltage, electric current, test run time, while carrying out safety instruction and the final result to experiment in test operation process
4. voice message sends communication signal, realizes the storage and printing of test data.
IGBT (Insulated Gate Bipolar Transistor) represent insulated gate bipolar transistor, be by
The compound full-control type voltage driven type power semiconductor of BJT (double pole triode) and MOS (insulating gate type field effect tube) compositions
Device, has the high input impedance of MOSFET and advantage of both the low conduction voltage drop of GTR concurrently.Connect by IGBT driver elements
Receipts DSP weak electric signals, are acted by the conducting and shut-off controlled motor of IGBT, closely realize having to experimental rig output voltage
Effect regulation and control.
The test voltage of low voltage equipment intellectuality power frequency withstanding voltage experiment and the nominal insulation of low voltage equipment
Voltage is directly related.The frequency of experiment power supply is the alternating current of 45-65Hz, and output voltage is must sine wave.In order to ensure examination
The impedance in electrical verification source is far smaller than leak resistance, is to be adjusted to experiment in testing transformer output voltage to experiment power supply capacity
After voltage, output terminal shortcircuit its output current is at least 200mA.Process of the test in order to prevent the impact of voltage, when voltage is raised
Should be since the test voltage value less than 1/2, with the setting being stepped up in the time of about 5s.
Low voltage equipment intellectuality power frequency withstanding voltage test method, before the test by wire by the examination of experimental rig
Test transformer voltage and go out output end and test product（Low-voltage electrical apparatus）Measuring point is connected, and experiment concrete operation step is as follows：
（1）System electrification, initialization, self-inspection；
（2）Guidance panel is by test voltage value and pressure Time Transmission to dsp processor；
（3）Dsp processor sends control instruction motor and drives pressure regulator life pressure, while collection voltages information, and with setting
Value compares；
（4）Applied voltage carries out voltage stabilizing operation in arranges value claimed range；
（5）Dsp processor is started counting up, and is compared in the pressure time；
（6）System reset is reset after reaching pressure-resistant time, and DSP transmission tests parameter and result of the test are gone forward side by side to industrial computer
Row storage and printing；
（7）Equipment reduction, off-test.
Low voltage equipment power frequency withstanding voltage experiment result of the test judges：In whole power frequency withstanding voltage process of the test
In, low voltage equipment should without internal or external insulation flashover, puncture and other any disruptive discharges occur, aura is put
Except electricity.
As shown in Fig. 2 Fig. 2 is current transformer and DSP wiring diagrams in the present invention.The circuit includes resistance R1, resistance
R2, resistance R3, electric capacity C1, electric capacity C2, power supply, signal processor OPO7, wherein power supply are divided into VCC terminal ,-VCC terminal and GND
Terminal.Line connecting relation is as follows：Current feedback signal is by the binding post 3 and electricity after resistance R1 with signal processor OPO7
Hold C1 to be connected, the other end of electric capacity C1 is connected with the GND terminal of power supply, and the binding post 2 of signal processor OPO7 passes through
Resistance R2, resistance R3 are connected with the signal input part and electric capacity C2 of DSP, and the binding post 6 of signal processor OPO7 is by electricity
Resistance R3 is connected with the signal input part and electric capacity C2 of DSP, and the other end of electric capacity C2 is connected with the GND terminal of power supply, signal
The binding post 7 of processor OPO7 is connected with the VCC terminal of power supply, the binding post 4 of signal processor OPO7 and power supply-
VCC terminal is connected, and the binding post 1,3,5 of signal processor OPO7 is hanging.The output 0-5V signals of current transformer pass through
0-3.3V signals that DSP can recognize to the signal input part of DSP are converted into after current transformer and DSP wiring diagrams.
Claims (6)
1. low voltage equipment intellectuality power frequency withstanding voltage pilot system, including industrial computer（19）And printer（20）,
It is characterized in that：Also include experiment power supply（1）, protection switch（2）, pressure regulator（3）, choke induction（4）, testing transformer（5）, examination
Product（6）, dsp processor（7）, display unit（8）, voice alerting unit（9）, IGBT driver elements（10）、IGBT（11）, motor
（12）, voltage transformer（13）, current transformer（14）, isolation amplifying unit V（15）, isolation amplifying unit A（16）, operating surface
Plate（17）And communication unit（18）；Wherein experiment power supply（1）With protection switch（2）It is connected, protection switch（2）With pressure regulator
（3）It is connected, pressure regulator（3）By choke induction（4）With testing transformer（5）It is connected, testing transformer（5）With test product
（6）It is connected, display unit（8）With dsp processor（7）It is connected, voice alerting unit（9）With dsp processor（7）It is connected
Connect, IGBT driver elements（10）With dsp processor（7）It is connected, IGBT（11）With IGBT driver elements（10）It is connected, it is electronic
Machine（12）With IGBT（11）It is connected；Voltage transformer（13）Summation current transformer（14）And testing transformer（5）It is connected；
Isolation amplifying unit V（15）With voltage transformer（13）It is connected, isolation amplifying unit A（16）With current transformer（14）It is connected
Connect；Isolation amplifying unit V（15）, isolation amplifying unit A（16）And dsp processor（7）It is connected, guidance panel（17）With
Dsp processor（7）It is connected, industrial computer（19）By communication unit（18）With dsp processor（7）It is connected, printer
（20）With industrial computer（19）It is connected.
2. low voltage equipment according to claim 1 intellectuality power frequency withstanding voltage pilot system, it is characterized in that：It is described
Experiment power supply（1）Output end and protection switch（2）Input be connected, protection switch（2）Output end and pressure regulator（3）
Power input be connected, pressure regulator（3）Voltage output end by choke induction（4）With testing transformer（5）Once
Side is connected, testing transformer（5）Secondary side and test product（6）Power frequency withstanding voltage experiment position be connected, display unit
（8）Input and dsp processor（7）Signal output part be connected, voice alerting unit（9）Input and DSP treatment
Device（7）Signal output part be connected, IGBT driver elements（10）Input and DSP（7）Signal output part be connected,
IGBT（11）Control signal input base stage and IGBT driver elements（10）Drive signal output end be connected, motor
（12）Winding and IGBT（11）Collector and emitter be connected；Voltage transformer（13）Measurement end and testing transformer
（5）Voltage signal output end be connected, current transformer（14）Measurement end and testing transformer（5）Current signal output
End is connected；Isolation amplifying unit V（15）Signal input part and voltage transformer（13）Signal output part be connected, isolate
Amplifying unit A（16）Signal input part and current transformer（14）Signal output part be connected；Isolation amplifying unit V
（15）, isolation amplifying unit A（16）Signal output part and dsp processor（7）Signal input part be connected, guidance panel
（17）Signal output part and dsp processor（7）Signal input part be connected, industrial computer（19）By communication unit
（18）With dsp processor（7）Communication signal input be connected, printer（20）Signal input part and industrial computer
（19）USB interface be connected.
3. low voltage equipment according to claim 1 intellectuality power frequency withstanding voltage pilot system, it is characterized in that：It is described
The test voltage of pilot system is directly related with the nominal insulation voltage of low voltage equipment, and the frequency of experiment power supply is 45-
The alternating current of 65Hz, output voltage is sine wave；In order to the impedance of guarantee test power supply is far smaller than leak resistance, to experiment electricity
Source capacity is that after testing transformer output voltage is adjusted to test voltage, output terminal shortcircuit its output current is at least
200mA；Process of the test in order to prevent the impact of voltage, when voltage is raised since the test voltage value less than 1/2, with about 5s's
The setting being stepped up in time.
4. low voltage equipment intellectuality power frequency withstanding voltage test method, it is characterized in that：To be tested by wire before the test
The testing transformer voltage of system goes out output end and is connected with the i.e. low-voltage electrical apparatus measuring point of test product, and experiment concrete operation step is such as
Under：
（1）System electrification, initialization, self-inspection；
（2）Guidance panel is by test voltage value and pressure Time Transmission to dsp processor；
（3）Dsp processor sends control instruction motor and drives pressure regulator life pressure, while collection voltages information, and with setting
Value compares；
（4）Applied voltage carries out voltage stabilizing operation in arranges value claimed range；
（5）Dsp processor is started counting up, and is compared in the pressure time；
（6）System reset is reset after reaching pressure-resistant time, and DSP transmission tests parameter and result of the test are gone forward side by side to industrial computer
Row storage and printing；
（7）Equipment reduction, off-test.
5. low voltage equipment according to claim 4 intellectuality power frequency withstanding voltage test method, it is characterized in that：It is described
Low voltage equipment power frequency withstanding voltage experiment result of the test judges：In whole power frequency withstanding voltage process of the test, low tension
Device equipment should without internal or external insulation flashover, puncture and other any disruptive discharges occur, except glow discharge.
6. low voltage equipment according to claim 1 intellectuality power frequency withstanding voltage test method, it is characterized in that：It is described
Current transformer and DSP connection circuits, in circuit including resistance R1, resistance R2, resistance R3, electric capacity C1, electric capacity C2, power supply,
Signal processor OPO7, wherein power supply are divided into VCC terminal ,-VCC terminal and GND terminal；Line connecting relation is as follows：Electric current is anti-
Feedback signal is connected by binding post 3 and electric capacity C1 after resistance R1 with signal processor OPO7, the other end of electric capacity C1 with
The GND terminal of power supply is connected, and the binding post 2 of signal processor OPO7 is by resistance R2, the signal input of resistance R3 and DSP
End and electric capacity C2 are connected, the binding post 6 of signal processor OPO7 by resistance R3 and DSP signal input part and electric capacity C2
It is connected, the other end of electric capacity C2 is connected with the GND terminal of power supply, binding post 7 and the power supply of signal processor OPO7
VCC terminal is connected, the binding post 4 of signal processor OPO7 and power supply-VCC terminal is connected, signal processor OPO7
Binding post 1,3,5 it is hanging；The output 0-5V signals of current transformer after current transformer and DSP connection circuits by changing
Signal input part of the 0-3.3V signals that can be recognized into DSP to DSP.
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| CN201611107727.5A CN106771907A (en) | 2016-12-06 | 2016-12-06 | Low voltage equipment intellectuality power frequency withstanding voltage pilot system and method |
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|---|---|---|---|
| CN201611107727.5A CN106771907A (en) | 2016-12-06 | 2016-12-06 | Low voltage equipment intellectuality power frequency withstanding voltage pilot system and method |
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Family
ID=58874331
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| CN109856512A (en) * | 2019-02-01 | 2019-06-07 | 广州小鹏汽车科技有限公司 | Integrated form driving motor system insulation pressure resistance method for testing performance, device and system |
| CN112230163A (en) * | 2020-08-31 | 2021-01-15 | 煤科集团沈阳研究院有限公司 | Low-voltage alternating-current electric appliance on-off inspection expected parameter adjusting system and parameter adjusting method |
| CN117554856A (en) * | 2024-01-09 | 2024-02-13 | 国网山西省电力公司电力科学研究院 | Performance verification device and method for active defense equipment for turn-to-turn short circuit of transformer |
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| CN117554856A (en) * | 2024-01-09 | 2024-02-13 | 国网山西省电力公司电力科学研究院 | Performance verification device and method for active defense equipment for turn-to-turn short circuit of transformer |
| CN117554856B (en) * | 2024-01-09 | 2024-04-05 | 国网山西省电力公司电力科学研究院 | Performance verification device and method for active defense equipment for turn-to-turn short circuit of transformer |
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