CN107102202A - A kind of direct gauge assembly of single-phase high voltage high current - Google Patents
A kind of direct gauge assembly of single-phase high voltage high current Download PDFInfo
- Publication number
- CN107102202A CN107102202A CN201710418622.XA CN201710418622A CN107102202A CN 107102202 A CN107102202 A CN 107102202A CN 201710418622 A CN201710418622 A CN 201710418622A CN 107102202 A CN107102202 A CN 107102202A
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- China
- Prior art keywords
- high voltage
- phase high
- gauge assembly
- metering units
- phase
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- 238000005259 measurement Methods 0.000 claims abstract description 19
- 239000013307 optical fiber Substances 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
- G01R22/066—Arrangements for avoiding or indicating fraudulent use
Abstract
A kind of direct gauge assembly of single-phase high voltage high current, including electronic current mutual inductor, electronic type voltage transformer, single-phase high voltage metering units, equipotential power supply unit, the second interface of described electronic current mutual inductor is connected with the interface of single-phase high voltage metering units, interface of the U1 measurement signals access that the second interface of described electronic type voltage transformer is exported in single-phase high voltage metering units, the U2 exported powers output access in equipotential power supply unit, it is ac-dc converter circuit inside equipotential power supply unit, and the U3 power supplies in single-phase high voltage metering units required for circuit normal work are provided；The present invention has overall accuracy definition, and the data of metering are interacted with optical fiber or wireless mode with outside, with miniaturization, low-power consumption, anti-electricity-theft significant advantage.
Description
Technical field
The invention belongs to high pressure measurement component technology field, more particularly to a kind of single-phase high voltage high current directly metering group
Part.
Background technology
Conventional high-tension Super-Current Measurement method is electric by high voltage and greatly with high voltage potential transformer, high-tension current inductor
Circulation changes the low-voltage signal amount needed for secondary meter into.Electronic mutual inductor is also once high-pressure section and double measurement, and
With secondary meter, measure and control device or power meter group into measuring system.The developing direction of high-voltage great-current e measurement technology is
Integrated, intelligent, the miniaturization of one or two fusions.
And conventional high-tension metering device under 35kV and higher voltage, it is necessary to using voltage transformer, current transformer, two
Secondary measurement loop and ammeter.New electronic mutual inductor and combination electronic mutual inductor, also also needs to configure corresponding numeral
Formula electric energy meter constitutes metering system.
The insulation of the metering method, mainly electromagnetic mode of existing conventional electromagnetic transformer and low -voltage Watt -hour meter composition
The measurement dynamic range that volume is larger, magnetic saturation is determined is not wide, and voltage transformer secondary can not short circuit, Current Transformer Secondary
It can not open a way, secondary circuit causes measurement error and anti-electricity-theft problem.
The metering system constituted using electronic mutual inductor, compared with conventional electromagnetic transformer, with iron-core-free and magnetic
Saturation problem, range of dynamic measurement be wide, secondary digitlization good in anti-interference performance the advantages of.
But if being constituted using electronic type voltage transformer, electronic current mutual inductor, combining unit, digital electric energy meter
One high-voltage great-current metering system, it is matter of utmost importance, economy that how the overall accuracy of measuring of this metering system, which defines,
No advantage can be compared with conventional electromagnetic scheme, electrical power trans mission/distribution system miniaturization, densification, digitlization, intelligence can not be also adapted to
The demand for development of energyization.
The content of the invention
It is an object of the invention to overcome the shortcomings of that prior art is present, and one kind is provided and is mainly used in power distribution network and defeated change
The direct gauge assembly of single-phase high voltage high current of power network.
The purpose of the present invention is completed by following technical solution, and the direct gauge assembly of single-phase high voltage high current is
Single-phase piece calibration is carried out, and with clearly defined class of accuracy, it includes electronic current mutual inductor, electronic type voltage
Transformer, single-phase high voltage metering units, equipotential power supply unit, the second interface of described electronic current mutual inductor with it is single-phase
The interface of high pressure measurement unit is connected, and the U1 measurement signals that the second interface of described electronic type voltage transformer is exported connect
Enter the interface in single-phase high voltage metering units, the U2 exported powers output access in equipotential power supply unit, and equipotential is supplied
It is ac-dc converter circuit inside electric unit, and the U3 provided in single-phase high voltage metering units required for circuit normal work powers
Power supply；Described single-phase high voltage metering units, electronic current mutual inductor, equipotential power supply unit are in single-phase high voltage current potential
Equipotential on.
Preferably, described single-phase high voltage metering units complete voltage and current measurement and power energy is calculated, and it will survey
Amount result is transmitted out in the way of electrical isolation.
Preferably, the mode of described electrical isolation can use optical fiber or wireless transmission method.
Preferably, the class of accuracy of described component is 0.2S grades or 0.5S grades of active energy, reactive energy 0.5
Level, 1 grade or 2 grades.
Preferably, described electronic current mutual inductor uses LPCT or Rogowski coil.
Preferably, described electronic type voltage transformer uses resitstance voltage divider, capacitive divider or resistive-capacitive voltage divider
Device.
Preferably, described U3 power supplies are 5V or 3.3V equal-specification power supplies.
Preferably, described single-phase high voltage metering units include MCU main control chips and respectively with MCU main control chip phases
The computation chip of connection, storage chip, clock chip, communication module, hardware watchdog, pulse output light power port.
Preferably, described MCU main control chips and computation chip two parts becomes one as integrated chip, and meter
Measure chip and use the computation chip with SOC.
Beneficial effects of the present invention are：Can be exported directly in the form of high accuracy number amount on high-tension side information about power,
Power information, metering system integrated level is greatly improved, and overall structure is greatly simplified；And the device can save a large amount of copper, iron and absolutely
Edge material consumption, substantially reduces device production cost, reduces operation energy consumption, reduces device volume and occupation of land；Metering system is on the spot
Digitlization can improve the anti-electricity-theft ability of device, effective guarantee metering system degree of accuracy performance.
Brief description of the drawings
Fig. 1 is the gauge assembly structural representation of the present invention.
Fig. 2 is the single-phase high voltage metering units structural representation of the present invention.
Fig. 3 is a kind of implementation structural representation of the present invention.
Label in accompanying drawing is respectively：1st, electronic current mutual inductor；2nd, electronic type voltage transformer；3rd, single-phase high voltage meter
Measure unit；4th, equipotential power supply unit；31st, MCU main control chips；32nd, computation chip；33rd, storage chip；34th, clock chip；
35th, communication module；36th, hardware watchdog；37th, pulse output light power port.
Embodiment
Detailed introduction is done to the present invention below in conjunction with accompanying drawing：As shown in Figure 1, the single-phase high voltage high current is directly counted
Amount component is to carry out single-phase piece calibration, and with clearly defined class of accuracy, it include electronic current mutual inductor 1,
Electronic type voltage transformer 2, single-phase high voltage metering units 3, equipotential power supply unit 4, described electronic current mutual inductor 1
Second interface is connected with the interface of single-phase high voltage metering units 3, and the second interface institute of described electronic type voltage transformer 2 is defeated
The U1 measurement signals access gone out is in the interface of single-phase high voltage metering units 3, and the U2 exported, which powers, exports access in equipotential confession
In electric unit 4, the inside of equipotential power supply unit 4 is ac-dc converter circuit, and provides in single-phase high voltage metering units 3 circuit just
U3 power supplies required for often working；Described single-phase high voltage metering units 3, electronic current mutual inductor 1, equipotential are powered
Unit 4 is on the equipotential of single-phase high voltage current potential.
Described single-phase high voltage metering units 3 complete voltage and current measurement and power energy is calculated, and by measurement result with
The mode of electrical isolation is transmitted out.
The mode of described electrical isolation can use optical fiber or wireless transmission method.
The class of accuracy of described component be 0.2S grades or 0.5S grades of active energy, 0.5 grade, 1 grade of reactive energy or
2 grades of person.
Described electronic current mutual inductor 1 uses LPCT or Rogowski coil.
Described electronic type voltage transformer 2 is using resitstance voltage divider, capacitive divider or RC divider.
Described U3 power supplies are 5V or 3.3V equal-specification power supplies.
As shown in Figure 2, described single-phase high voltage metering units 3 include MCU main control chips 31 and respectively with MCU master controls
Computation chip 32 that chip 31 is connected, storage chip 33, clock chip 34, communication module 35, hardware watchdog 36, pulse are defeated
Go out photoelectric port 37；The major function of single-phase high voltage metering units 3 be carry out voltage, the sampling of current signal and it is digital when split
Multiplication carries out power and electric flux is calculated, while also including data uplink communication.
The function optimization that described MCU main control chips 31 and the two parts of computation chip 32 becomes one as integrated chip
Design, and computation chip 32 uses the computation chip with SOC.
The single direct gauge assembly of single-phase high voltage high current of the present invention can realize that single-phase electric energy is measured, can also be by two
The individual direct gauge assembly of single-phase high voltage high current constitutes the high-voltage meter of phase three-wire three, can also be big by three single-phase high voltages
The direct gauge assembly of electric current constitutes the high-voltage meter of three-phase and four-line.Needed for different power network Contact patch and metering method
Will, the present invention has flexibly extensive applied value.
The present invention is by taking a kind of implementation of the direct gauge assembly of 10kV high-voltage great-currents as an example, as shown in Figure 3,
Three direct gauge assemblies of single-phase high voltage high current are respectively adopted in 10kV A, B, C three-phase.
Electronic current mutual inductor 1 is using 600A/1V Rogowski coil, rated primary current 600A, secondary output
For 1V.
Electronic type voltage transformer 2 is using the capacitive divider of doubleway output, and measurement voltage U1 is 2V, and supply voltage U2 is
220V。
Single-phase high voltage metering units 3 complete voltage and current measurement and power energy and calculated, and by measurement result with electrically every
From mode transmit out, the method for electrical isolation can be using optical fiber or wireless.
Equipotential is powered if only 4 working power uses AC/DC Switching Power Supplies, the U2 alternating currents that capacitive divider is exported
Source（220V）Be converted to the low-voltage direct 3.3V operating voltages needed for single-phase measurement unit.
The present invention is not limited to the above-described embodiments, and any change is made no matter being constituted in its shape or material, every to adopt
Structure design provided by the present invention is used, is all a kind of deformation of the present invention, is considered as within the scope of the present invention.
Claims (9)
1. a kind of direct gauge assembly of single-phase high voltage high current, it is characterised in that：The direct gauge assembly of single-phase high voltage high current
It is to carry out single-phase piece calibration, and with clearly defined class of accuracy, it includes electronic current mutual inductor（1）, electronics
Formula voltage transformer（2）, single-phase high voltage metering units（3）, equipotential power supply unit（4）, described electronic current mutual inductor
（1）Second interface and single-phase high voltage metering units（3）Interface be connected, described electronic type voltage transformer（2）Two
The U1 measurement signals that secondary interface is exported are accessed in single-phase high voltage metering units（3）Interface, the U2 exported outputs of powering connect
Enter in equipotential power supply unit（4）It is interior, equipotential power supply unit（4）Inside is ac-dc converter circuit, and provides single-phase high voltage
Metering units（3）U3 power supplies required for interior circuit normal work；Described single-phase high voltage metering units（3）, electronic type
Current transformer（1）, equipotential power supply unit（4）On the equipotential for being in single-phase high voltage current potential.
2. the direct gauge assembly of single-phase high voltage high current according to claim 1, it is characterised in that：Described single-phase high voltage
Metering units（3）Complete voltage and current measurement and power energy is calculated, and measurement result is transmitted out in the way of electrical isolation
Come.
3. the direct gauge assembly of single-phase high voltage high current according to claim 2, it is characterised in that：Described electrical isolation
Mode can use optical fiber or wireless transmission method.
4. the direct gauge assembly of single-phase high voltage high current according to claim 1, it is characterised in that：The standard of described component
Exactness grade is 0.2S grades or 0.5S grades of active energy, 0.5 grade, 1 grade or 2 grades of reactive energy.
5. the direct gauge assembly of single-phase high voltage high current according to claim 1, it is characterised in that：Described electronic type electricity
Current transformer（1）Using LPCT or Rogowski coil.
6. the direct gauge assembly of single-phase high voltage high current according to claim 1, it is characterised in that：Described electronic type electricity
Press transformer（2）Using resitstance voltage divider, capacitive divider or RC divider.
7. the direct gauge assembly of single-phase high voltage high current according to claim 1, it is characterised in that：Described U3 powers electricity
Source is 5V or 3.3V equal-specification power supplies.
8. the direct gauge assembly of single-phase high voltage high current according to claim 1, it is characterised in that：Described single-phase high voltage
Metering units（3）Including MCU main control chips（31）And respectively with MCU main control chips（31）The computation chip being connected（32）, deposit
Store up chip（33）, clock chip（34）, communication module（35）, hardware watchdog（36）, pulse output light power port（37）.
9. the direct gauge assembly of single-phase high voltage high current according to claim 8, it is characterised in that：Described MCU master controls
Chip（31）And computation chip（32）Two parts become one as integrated chip, and computation chip（32）Using with SOC's
Computation chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710418622.XA CN107102202A (en) | 2017-06-06 | 2017-06-06 | A kind of direct gauge assembly of single-phase high voltage high current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710418622.XA CN107102202A (en) | 2017-06-06 | 2017-06-06 | A kind of direct gauge assembly of single-phase high voltage high current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107102202A true CN107102202A (en) | 2017-08-29 |
Family
ID=59660832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710418622.XA Pending CN107102202A (en) | 2017-06-06 | 2017-06-06 | A kind of direct gauge assembly of single-phase high voltage high current |
Country Status (1)
| Country | Link |
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| CN (1) | CN107102202A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907700A (en) * | 2019-11-26 | 2020-03-24 | 国网浙江省电力有限公司电力科学研究院 | Direct-current electric energy meter for direct-current distribution network and metering method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110907700A (en) * | 2019-11-26 | 2020-03-24 | 国网浙江省电力有限公司电力科学研究院 | Direct-current electric energy meter for direct-current distribution network and metering method |
| CN110907700B (en) * | 2019-11-26 | 2021-12-07 | 国网浙江省电力有限公司营销服务中心 | Direct-current electric energy meter for direct-current distribution network and metering method |
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Application publication date: 20170829 |