CN108492658A - Portable electric meter wiring emulating instrument - Google Patents
Portable electric meter wiring emulating instrument Download PDFInfo
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- CN108492658A CN108492658A CN201810276470.9A CN201810276470A CN108492658A CN 108492658 A CN108492658 A CN 108492658A CN 201810276470 A CN201810276470 A CN 201810276470A CN 108492658 A CN108492658 A CN 108492658A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/187—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for measuring instruments
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- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Measuring Phase Differences (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of portable electric meter wiring emulating instruments, including：Voltage-phase translation circuit, for the another two-phase voltage by single-phase voltage output and 120 ° of the single-phase voltage phase mutual deviation；The voltage-phase translation circuit includes sequentially connected first reduction voltage circuit, the first phase-shift circuit, the first negative circuit, the first power amplifier and the first booster circuit and sequentially connected second phase-shift circuit, the second negative circuit, the second power amplifier and the second booster circuit；The input terminal of second phase-shift circuit is also connect with the output end of first negative circuit；Further include three-phase current generation module, three-phase alternating current is generated for passing through single-phase voltage；The three-phase current generation module includes at least sequentially connected second reduction voltage circuit, shaping circuit and microcontroller.The present invention can provide three-phase voltage and electric current in the place to operate schools of only single phase poaer supply, and the various false wiring forms that simulation electric energy meter is likely to occur facilitate student to learn from practical application.
Description
Technical field
The present invention relates to a kind of emulator, more particularly to a kind of portable electric meter wiring emulating instrument.
Background technology
Generally three-phase four-wire system electric energy meter is used to carry out three-phase electric energy metering, the correctness of wiring in low voltage power distribution network
The economic benefit of the accurate and power generation of metering is directly affected, important behaviour is exactly line loss exception.To improve marketing personnel
It to the analytical judgment ability of false wiring of electric energy meter, needs on the spot to practice using meter, electricity is inputted under measuring error wiring state
The voltage current phase relationship of energy table, misjudgment wiring type calculate more positive coefficient, but general power supply branch cannot carry
For such coach concourse and equipment.
Invention content
The present invention provides a kind of portable solution, can provide three-phase electricity in the place to operate schools of only single phase poaer supply
Pressure and electric current, the various false wiring forms that simulation electric energy meter is likely to occur, facilitate student to learn from practical application.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes：
A kind of portable electric meter wiring emulating instrument, including：
Voltage-phase translation circuit includes at least sequentially connected first reduction voltage circuit, the first phase-shift circuit, the first reverse phase electricity
Road, the first power amplifier and the first booster circuit and sequentially connected second phase-shift circuit, the second negative circuit, the second work(
Discharge road and the second booster circuit；The input terminal of second phase-shift circuit also connects with the output end of first negative circuit
It connects；First phase-shift circuit is used for the first 0-90 ° of phase voltage U1 phase shifts after first reduction voltage circuit decompression；It should
The voltage of 0-90 ° of phase shift obtains the voltage of 180-270 ° of phase shift through the first negative circuit reverse phase, through the first power amplifier and
First booster circuit obtains the second phase voltage U2；The voltage of 180-270 ° of simultaneous phase shifting is arrived through the second phase-shift circuit phase shift
270-360 °, then the voltage of 90-180 ° of phase shift is obtained through the second negative circuit, by the second power amplifier and the second booster circuit
Obtain third phase voltage U3；
Three-phase current generation module includes at least sequentially connected second reduction voltage circuit, shaping circuit and microcontroller；Single-phase voltage
Sine voltage is formed through the second reduction voltage circuit and shaping circuit；The microcontroller is by setting three different delays, by this
Sine voltage is converted to three-phase sine wave voltage and is exported；The three-phase sine wave voltage is converted through a D/A successively respectively
Circuit, a power amplifier and a up-flow circuit form three-phase current.
Preferably, the three-phase sine wave voltage is respectively successively through the first D/A conversion circuits, third power amplifier and first
It flows up circuit and forms phase current I1；Successively mutually electricity is formed through the 2nd D/A conversion circuits, the 4th power amplifier and the second up-flow circuit
Flow I2；Successively phase current I3 is formed through the 3rd D/A conversion circuits, the 5th power amplifier and third up-flow circuit.
Preferably, the voltage-phase translation circuit, further include be connected to the first negative circuit and the first power amplifier it
Between the first follower, and the second follower for being connected between the second negative circuit and the second power amplifier；Described first
Follower and the second follower are used for impedance matching, isolation voltage influencing each other between reverse phase and power amplifier.
Preferably, the voltage-phase translation circuit further includes between the first follower and the first power amplifier and
Commutation circuit between two followers and the second power amplifier；The commutation circuit for changing output voltage phase sequence.
Preferably, the output loop of three different delayed time of the microcontroller by setting delay between 0~0.02 second,
The sine voltage is converted into 50Hz three-phase sine wave voltages.
Preferably, the voltage-phase translation circuit and three-phase current generation module are arranged in a babinet.
Preferably, keyboard is provided on the babinet, the keyboard is connected to the commutation circuit, for adjusting described change
Circuitry phase carries out two-phase output voltage phase sequence and exchanges；The keyboard is additionally coupled to AVR single chip, for setting the AVR monolithics
Machine parameter regulation three-phase current phase sequence and three-phase current and voltage angle.
Preferably, the keyboard includes at least：
First button, the positive and negative phase sequence for voltage to be arranged；
Second button, third button and the 4th button press sequence decision three-phase output current sequence for passing through, and pass through weight
180 ° of the corresponding anti-phase of button for adjusting and pressing is pressed again；
5th button and the 6th button, the plus-minus for adjusting three-phase current phase.
Preferably, display unit is additionally provided on the babinet, the display unit is connect with microcontroller, for showing
State the phase sequence and phase of the voltage phase sequence and three-phase current of keyboard setting.
Preferably, the display unit is LCD liquid crystal display screen.
Compared with prior art, beneficial effects of the present invention：The portable electric meter wiring emulating instrument of the present invention is based on resistance
Hold phase shift and generate three-phase voltage, be based on microcontroller synchronization triggering and generate three-phase current, completes to can be changed by single phase poaer supply generation three-phase
The voltage and current of phase sequence, phase, for the teaching that three-phase four-wire system false wiring of electric energy meter judges, and in only single-phase electricity
The place in source provides three-phase simulation voltage and current and provides study for debugging efforts to only have the place to operate schools of single phase poaer supply
The solution of three-phase and four-line false wiring of electric energy meter is judged with practice；And the portable electric meter wiring emulating instrument of the present invention
Small and exquisite portable, manufacturing cost is low, easy to use, has reached the function of professional work platform.
Description of the drawings：
Fig. 1 is that the three-phase voltage of the present invention generates principle schematic；
Fig. 2 is voltage-phase translation circuit block diagram in one embodiment of the invention；
Fig. 3 is voltage-phase translation circuit figure in one embodiment of the invention；
Fig. 4 is voltage-phase translation circuit block diagram in another preferred embodiment of the present invention；
Fig. 5 is voltage-phase translation circuit figure in another preferred embodiment of the present invention；
Fig. 6 is three-phase current generation module block diagram in one embodiment of the invention；
Fig. 7 is one embodiment of the invention middle case front panel schematic diagram；
Fig. 8 is that program chart is arranged in keyboard of the present invention；
Fig. 9 is the wiring diagram with three-phase four-wire system electric energy meter when the present invention uses.
Specific implementation mode
With reference to test example and specific implementation mode, the present invention is described in further detail.But this should not be understood
It is only limitted to embodiment below for the range of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that the content of present invention is realized
The range of invention.
In one embodiment, portable electric meter wiring emulating instrument, including：
Voltage-phase translation circuit, for the another two-phase electricity by single-phase voltage output and 120 ° of the single-phase voltage phase mutual deviation
Pressure.The principle that its three-phase voltage generates is as shown in Figure 1：The sinusoidal voltage of 120 ° of three-phase voltage i.e. three phase mutual deviation, using shifting
Single-phase voltage is converted to three-phase voltage by the mode of phase；Although the phase-shift circuit phase shift range of resistance capacitance composition is only 0-90 °,
But 180-270 ° of phase-shift phase can be obtained by reverse phase, therefore, passes through 240 ° of phase shift and reverse phase twice, you can obtain mutual deviation
120 ° of sinusoidal voltage.
Specifically, as Figure 2-3, a kind of portable electric meter wiring emulating instrument, including：
Voltage-phase translation circuit includes at least sequentially connected first reduction voltage circuit, the first phase-shift circuit, the first reverse phase electricity
Road, the first power amplifier and the first booster circuit and sequentially connected second phase-shift circuit, the second negative circuit, the second work(
Discharge road and the second booster circuit；The input terminal of second phase-shift circuit also connects with the output end of first negative circuit
It connects；First phase-shift circuit is used for the first 0-90 ° of phase voltage U1 phase shifts after first reduction voltage circuit decompression；It should
The voltage of 0-90 ° of phase shift obtains the voltage of 180-270 ° of phase shift through the first negative circuit reverse phase, through the first power amplifier and
First booster circuit obtains the second phase voltage U2；The voltage of 180-270 ° of simultaneous phase shifting is arrived through the second phase-shift circuit phase shift
270-360 °, then the voltage of 90-180 ° of phase shift is obtained through the second negative circuit, by the second power amplifier and the second booster circuit
Obtain third phase voltage U3.
In another preferred embodiment, as illustrated in figures 4-5, the voltage-phase translation circuit, further includes being connected to first
The first follower between negative circuit and the first power amplifier, and be connected to the second negative circuit and the second power amplifier it
Between the second follower；First follower and the second follower, are used for impedance matching, isolation voltage reverse phase and power amplifier it
Between influence each other.
In another preferred embodiment, the voltage-phase translation circuit further includes the first follower and the first power amplifier electricity
Commutation circuit between road and between the second follower and the second power amplifier；The commutation circuit is for changing output voltage
Phase sequence, commutation circuit described in the present embodiment preferably uses a selecting switch into line output voltage Phase-Sequence Transformation.
The output power of the two-phase voltage generated by above-mentioned phase shift system is little, cannot be directly used to bringing onto load and generates institute
Electric current is needed, therefore, the portable electric meter wiring emulating instrument of an embodiment further includes three-phase current generation module, for passing through list
Phase voltage generates three-phase alternating current, is dropped as shown in fig. 6, the three-phase current generation module includes at least sequentially connected second
Volt circuit, shaping circuit and microcontroller, preferred AVR single chip in the present embodiment；Single-phase voltage is through the second reduction voltage circuit and shaping
Circuit forms sine voltage；The sine voltage is converted to three by the AVR single chip by setting three different delays
Phase sine voltage is exported；Further, the AVR single chip is by setting delay three between 0~0.02 second
Different delays, the three-phase sine wave voltage which is converted to 50Hz export；The three-phase sine-wave electricity
Pressure forms three-phase current through a D/A conversion circuits, a power amplifier and a up-flow circuit successively；Specifically, the three phase sine
Wave voltage forms phase current I1 through the first D/A conversion circuits, third power amplifier and the first up-flow circuit successively respectively；It passes through successively
2nd D/A conversion circuits, the 4th power amplifier and the second up-flow circuit form phase current I2；Successively through the 3rd D/A conversion circuits,
5th power amplifier and third up-flow circuit form phase current I3；Three-phase current I1, I2 and the I3 generated in the present embodiment is in 2A
Within, frequency 50HZ, synchronous with the single-phase voltage of input, initial phase angle is adjustable.
The voltage-phase translation circuit and three-phase current generation module are arranged in a babinet, and Fig. 7 is before the babinet
Panel schematic diagram is provided with keyboard on the babinet, and the keyboard is connected to the commutation circuit, for adjusting the commutation electricity
Road carries out two-phase output voltage phase sequence and exchanges；The keyboard is additionally coupled to AVR single chip, for setting the AVR single chip ginseng
Number adjusts three-phase current phase sequence and three-phase current and voltage angle；Specifically, the portable electric meter wiring of an embodiment is imitative
Program chart is arranged as shown in figure 8, the keyboard includes at least in the keyboard of true instrument：First button U, for be arranged voltage just,
Negative-phase sequence；Second button 1, third button 2 and the 4th button 3 press sequence decision three-phase output current sequence for passing through, and
By repeating to press 180 ° of the corresponding anti-phase of button for adjusting and pressing；5th button+and the 6th button-are for adjusting three-phase
The plus-minus of current phase adjusts three-phase current and voltage angle, since the mutual deviation angle of three-phase current is to have certain rule
, so only needing one phase of setting.It should be appreciated that the portable electric meter wiring emulating instrument of the present invention can provide three relatively
Claiming, the arbitrary voltage and current of phase angle, the acting characteristic for examining idle compensating control will such as test single-phase compensation characteristic,
Device internal program only need to be changed, every phase current phase is made to individually adjust, the modification of such conventional program also should be the guarantor of the present invention
Within the scope of shield.Further, display unit is additionally provided on the babinet, the display unit is connect with AVR single chip, is used
In the phase sequence and phase of the voltage phase sequence and three-phase current for showing the keyboard setting；The display unit is LCD liquid crystal displays
Screen, of low cost, intuitive display.
When using portable electric meter wiring emulating instrument of the invention, the wiring diagram with three-phase four-wire system electric energy meter is as schemed
9, since the circuits such as the display of meter, metering need the working power of certain power, and the two-phase voltage internal resistance that emulating instrument generates
Higher, to make operating circuit normal operation in four line electric energy meter of electronic three-phase, therefore three-phase four-wire system electric energy meter meter supplies
The phase voltage of electricity must use system voltage, i.e., as marked the voltage terminal for 1 " in emulating instrument in Fig. 8.Connect emulating instrument and electricity
After voltage, current terminal line between energy table, you can device for opening power supply carries out the output of simulation three-phase voltage, electric current：It presses
Lower first button U, is arranged the positive and negative phase sequence of voltage, presses the second button 1,3 key of third button 2 and the 4th button, and electric current phase sequence is arranged
And direction, by the phase angle between the 5th button+and six buttons-setting electric current and voltage；After setting, you can allow student in electricity
Energy table side volt-ampere phase meter, measures three-phase voltage phase sequence, each current phase angle etc., draws phasor diagram, carries out false wiring shape
Formula judges, writes out general power expression formula under the wiring state, calculates a series of training such as more positive coefficient.
The portable electric meter wiring emulating instrument of the present invention is based on capacitance-resistance phase shift and generates three-phase voltage, is synchronized based on microcontroller
Triggering generate three-phase current, complete by single phase poaer supply generate three-phase can Phase Sequence-changeable, phase voltage and current, be used for three-phase and four-line
The teaching that false wiring of electric energy meter processed judges, and three-phase simulation voltage and current is provided for adjusting in the place of only single phase poaer supply
Trial work is made, and to only have the place to operate schools of single phase poaer supply, provides study and practice judges three-phase and four-line false wiring of electric energy meter
Solution；And the portable electric meter wiring emulating instrument of the present invention is small and exquisite portable, and manufacturing cost is low, easy to use, reaches
The function of professional work platform.
Claims (10)
1. a kind of portable electric meter wiring emulating instrument, which is characterized in that including：
Voltage-phase translation circuit includes at least sequentially connected first reduction voltage circuit, the first phase-shift circuit, the first reverse phase electricity
Road, the first power amplifier and the first booster circuit and sequentially connected second phase-shift circuit, the second negative circuit, the second work(
Discharge road and the second booster circuit；The input terminal of second phase-shift circuit also connects with the output end of first negative circuit
It connects；First phase-shift circuit is used for the first 0-90 ° of phase voltage U1 phase shifts after first reduction voltage circuit decompression；It should
The voltage of 0-90 ° of phase shift obtains the voltage of 180-270 ° of phase shift through the first negative circuit reverse phase, through the first power amplifier and
First booster circuit obtains the second phase voltage U2；The voltage of 180-270 ° of simultaneous phase shifting is arrived through the second phase-shift circuit phase shift
270-360 °, then the voltage of 90-180 ° of phase shift is obtained through the second negative circuit, by the second power amplifier and the second booster circuit
Obtain third phase voltage U3；
Three-phase current generation module includes at least sequentially connected second reduction voltage circuit, shaping circuit and microcontroller；Single-phase voltage
Sine voltage is formed through the second reduction voltage circuit and shaping circuit；The microcontroller is by setting three different delays, by this
Sine voltage is converted to three-phase sine wave voltage and is exported；The three-phase sine wave voltage is converted through a D/A successively respectively
Circuit, a power amplifier and a up-flow circuit form three-phase current.
2. portable electric meter wiring emulating instrument as described in claim 1, which is characterized in that the three-phase sine wave voltage point
Phase current I1 is not formed through the first D/A conversion circuits, third power amplifier and the first up-flow circuit successively；Successively through the 2nd D/A
Conversion circuit, the 4th power amplifier and the second up-flow circuit form phase current I2；Successively through the 3rd D/A conversion circuits, the 5th work(
Discharge road and third up-flow circuit formation phase current I3.
3. portable electric meter wiring emulating instrument as described in claim 1, which is characterized in that the voltage-phase transformation electricity
Road further includes the first follower being connected between the first negative circuit and the first power amplifier, and is connected to the second reverse phase
The second follower between circuit and the second power amplifier；First follower and the second follower are used for impedance matching, every
Ionization voltage influencing each other between reverse phase and power amplifier.
4. portable electric meter wiring emulating instrument as claimed in claim 3, which is characterized in that the voltage-phase transformation electricity
Road further includes the commutation electricity between the first follower and the first power amplifier and between the second follower and the second power amplifier
Road；The commutation circuit for changing output voltage phase sequence.
5. portable electric meter wiring emulating instrument as described in claim 1, which is characterized in that the microcontroller is prolonged by setting
When three different delayed times between 0~0.02 second output loop, which is converted into 50Hz three-phase sine-waves
Voltage.
6. portable electric meter wiring emulating instrument as described in claim 1, which is characterized in that the voltage-phase translation circuit
It is arranged in a babinet with three-phase current generation module.
7. portable electric meter wiring emulating instrument as claimed in claim 6, which is characterized in that be provided with key on the babinet
Disk, the keyboard are connected to the commutation circuit, and the exchange of two-phase output voltage phase sequence is carried out for adjusting the commutation circuit；Institute
It states keyboard and is additionally coupled to AVR single chip, for setting the AVR single chip parameter regulation three-phase current phase sequence and three-phase current
With voltage angle.
8. portable electric meter wiring emulating instrument as claimed in claim 7, which is characterized in that the keyboard includes at least：
First button, the positive and negative phase sequence for voltage to be arranged；
Second button, third button and the 4th button press sequence decision three-phase output current sequence for passing through, and pass through weight
180 ° of the corresponding anti-phase of button for adjusting and pressing is pressed again；
5th button and the 6th button, the plus-minus for adjusting three-phase current phase.
9. portable electric meter wiring emulating instrument as claimed in claim 7, which is characterized in that be additionally provided on the babinet aobvious
Show that unit, the display unit are connect with microcontroller, the phase of voltage phase sequence and three-phase current for showing the keyboard setting
Sequence and phase.
10. portable electric meter wiring emulating instrument as claimed in claim 9, which is characterized in that the display unit is LCD liquid
Crystal display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810276470.9A CN108492658B (en) | 2018-03-30 | 2018-03-30 | Portable electric meter wiring emulating instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810276470.9A CN108492658B (en) | 2018-03-30 | 2018-03-30 | Portable electric meter wiring emulating instrument |
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| Publication Number | Publication Date |
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| CN108492658A true CN108492658A (en) | 2018-09-04 |
| CN108492658B CN108492658B (en) | 2019-09-17 |
Family
ID=63317734
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810276470.9A Active CN108492658B (en) | 2018-03-30 | 2018-03-30 | Portable electric meter wiring emulating instrument |
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| Country | Link |
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| CN (1) | CN108492658B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270315A (en) * | 2018-10-31 | 2019-01-25 | 国网四川省电力公司广元供电公司 | Two-phase inlet-outlet line polarity does not have a power failure commutation circuit |
| CN113077676A (en) * | 2021-03-29 | 2021-07-06 | 广东电网有限责任公司 | Electric energy metering cabinet signal input control system and electric energy metering cabinet wiring teaching device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109270315A (en) * | 2018-10-31 | 2019-01-25 | 国网四川省电力公司广元供电公司 | Two-phase inlet-outlet line polarity does not have a power failure commutation circuit |
| CN113077676A (en) * | 2021-03-29 | 2021-07-06 | 广东电网有限责任公司 | Electric energy metering cabinet signal input control system and electric energy metering cabinet wiring teaching device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108492658B (en) | 2019-09-17 |
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