CN208923837U - It is a kind of for administering the controlling terminal of distribution three-phase load unbalance - Google Patents
It is a kind of for administering the controlling terminal of distribution three-phase load unbalance Download PDFInfo
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- CN208923837U CN208923837U CN201821517243.2U CN201821517243U CN208923837U CN 208923837 U CN208923837 U CN 208923837U CN 201821517243 U CN201821517243 U CN 201821517243U CN 208923837 U CN208923837 U CN 208923837U
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- 230000001276 controlling effect Effects 0.000 title claims abstract description 19
- 238000004891 communication Methods 0.000 claims abstract description 70
- 238000005070 sampling Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 12
- 230000005611 electricity Effects 0.000 claims description 9
- 239000000969 carrier Substances 0.000 claims description 7
- 230000000875 corresponding Effects 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 230000001264 neutralization Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
It is a kind of for administering the controlling terminal of distribution three-phase load unbalance, including main control chip, three-phase voltage current signal sampling computing module, memory module, system power supply module, liquid crystal display and keyboard input module, communication module, the watchdog circuit for detecting terminal operating situation in time and give RTC clock, three phase transmission line road is provided with multiple phase-change switches, and the three-phase voltage current signal sampling computing module is connected with the main control chip；The main control chip is connect with the memory module, liquid crystal display and keyboard input module, communication module, watchdog circuit and RTC clock.The utility model provides a kind of for administering the controlling terminal of distribution three-phase load unbalance, the terminal can acquire distribution transformer low-pressure side three-phase voltage and three-phase current, calculate three-phase imbalance rate, control phase-change switch movement by correspondence, switch distribution of the single-phase load on three phase transmission line road, enables three-phase current kept in balance.
Description
Technical field
The utility model relates to intelligent power distribution network technology fields, more particularly, to one kind for administering distribution three-phase load not
The controlling terminal of balance.
Background technique
It is generally used the three-phase four-wire system mode of connection in the power distribution network of China town and country, with the rapid development of our country's economy
With the continuous improvement of living standards of the people, residential electricity consumption device category is also increasing, these electrical equipments are typically single-phase
Load, resulting out-of-balance current also increasingly increases distribution system influence, so that the three-phase imbalance of distribution network system
Problem is more and more prominent, and entire grid power quality problem is thus caused also to get worse, and especially in rural power grids, the problem is special
It is not serious.The main harm of three-phase imbalance has: increasing transformer loss, seriously threatens the electrical equipment of user, increase
The pressure drop of transmission line of electricity reduces transmission line of electricity terminal temperature difference voltage, affects user power utilization quality.Long-term three-phase imbalance,
It will increase the loss of platform area transformer, neutral current increases, or even will cause the neutral conductor and burn, and then damages electrical equipment.
Currently, solve the problems, such as low-voltage network three-phase load unbalance this, manual switching single-phase load power supply phase is usually used
Mode, but there is biggish limitations for this method: since load variations are frequent, need often to switch adjustment, or even every
It will switch several times, increase power supply company's human cost；In addition, the area Xian Duitai load is needed to have a power failure again when artificial commutation
It is operated, power off time is longer, has seriously affected the normal electricity consumption of user.
Summary of the invention
In order to overcome existing distribution network system to have the defects that three-phase imbalance, the utility model provide a kind of for controlling
The controlling terminal of distribution three-phase load unbalance is managed, which, by being wirelessly connected, forms one and lead to multiple phase-change switches
Communication network；Terminal can acquire distribution transformer low-pressure side three-phase voltage and three-phase current, calculate three-phase imbalance rate, with logical
Letter mode controls phase-change switch movement, and load phase-change switch is made mutually to be transferred to underload phase from high load capacity, i.e. switching single-phase load
Distribution on three phase transmission line road enables three-phase current kept in balance.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
It is a kind of for administering the controlling terminal of distribution three-phase load unbalance, including main control chip, three-phase voltage current letter
Number sampling computing module, memory module, system power supply module, check for user data and be arranged parameter liquid crystal display and by
Key input module, communication module, the watchdog circuit for detecting terminal operating situation in time and give controlling terminal provide essence
The RTC clock of true time reference, three phase transmission line road are provided with multiple phase-change switches, controlling terminal voltage input end with it is described
The connection of system power supply module installs voltage transformer in the voltage input end, and current input terminal installs current transformer, described
Voltage transformer and current transformer are connect with the sampling unit of three-phase voltage current signal sampling computing module respectively；It is described to adopt
Sample unit is connect with the computing unit of three-phase voltage current signal sampling computing module, the three-phase voltage current signal sampling meter
Module is calculated to be connected with the main control chip；The main control chip and the memory module, liquid crystal display and keyboard input module lead to
Letter module, watchdog circuit are connected with RTC clock；
The main control chip is connect with multiple phase-change switches, distant place main website and user terminal respectively by communication module；
Three-phase voltage current signal sampling computing module acquires three-phase voltage current signal in real time and calculates three-phase injustice
Weighing apparatus rate, when three-phase imbalance rate is more than setting limit value, the main control chip controls corresponding phase-change switch by communication module and moves
Make, single-phase load is made mutually to be transferred to underload phase from high load capacity, so that three-phase load is close to balance；Inquiring commutation
After switch state, distant place main website is transferred data to by communication module, it can also be whole by communication module and user at the scene
End connection, carries out real-time Data Transmission and maintenance.
Further, the communication module is equipped with communication interface, and the communication interface includes RS232 communication interface, RS485
Communication interface, small wireless communication interface, power line carrier, PLC interface, NB-loT communication interface, GPRS communication interface, Wi-Fi are logical
Believe interface；The main control chip passes through RS485 communication interface, small wireless communication interface, three kinds of power line carrier, PLC interface communications
The one of which of mode is connect with multiple phase-change switches, and the main control chip passes through NB-loT communication interface, GPRS communication interface
One of which in two kinds of communication modes is connect with distant place main website, and the Wi-Fi communication interface is connect with user terminal, the use
Family terminal is mobile phone or plate.
Further, the main control chip uses ARM latest generation embedded system kernel Cortex-M4.
Further, there are four LED lights for the liquid crystal display and keyboard input module setting, respectively indicate operation shape
State, alarm status, communications status 1 and communications status 2.
The beneficial effects of the utility model are mainly manifested in: control phase-change switch has monitoring parameters of electric power function concurrently；The end
Advanced control is held, multiple functional, when the real-time three-phase imbalance rate of system loading is more than setting limit value, terminal is selected in system
Phase-change switch, and control by wireless communication selected phase-change switch switching to it is suitable it is separate on go, keep system three-phase negative
Lotus substantially remains on equilibrium state, reduces line loss, transformer loss to reach and extends transformer service life, mentions
High power supply quality, and manual operation is reduced, achieve the purpose that switch in real time；In addition various parameters of electric power can also be supervised in real time
It surveys, and man-machine interface interaction is carried out by liquid crystal, key, and can carry out with distant place main website real-time by various communication interfaces
Information interconnection；It can also be directly connected to by mobile phone, plate and Wi-Fi, carry out information exchange.
Detailed description of the invention
Fig. 1 is the applied topology figure of the utility model.
Fig. 2 is the structural block diagram of the utility model.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.
Referring to Figures 1 and 2, a kind of for administering the controlling terminal of distribution three-phase load unbalance, including main control chip, three
Phase voltage current signal sampling computing module, system power supply module, checks for user data and parameter is arranged at memory module
Liquid crystal display and keyboard input module, communication module, the watchdog circuit for detecting terminal operating situation in time and to control
Terminal processed provides the RTC clock of accurate time reference, and three phase transmission line road is provided with multiple phase-change switches, controlling terminal voltage
Input terminal is connect with the system power supply module, installs voltage transformer, current input terminal installation electricity in the voltage input end
Current transformer, the voltage transformer and current transformer sampling list with three-phase voltage current signal sampling computing module respectively
Member connection；The sampling unit is connect with the computing unit of three-phase voltage current signal sampling computing module, the three-phase voltage
Current signal sampling computing module is connected with the main control chip；The main control chip and the memory module, liquid crystal display and
Keyboard input module, communication module, watchdog circuit are connected with RTC clock；
The main control chip is connect with multiple phase-change switches, distant place main website and user terminal respectively by communication module.
The controlling terminal acquires distribution transformer low-pressure side three-phase voltage and three-phase current, calculates three-phase imbalance rate,
When three-phase imbalance rate is more than setting limit value, phase-change switch movement is controlled by correspondence, makes load from high load capacity phase transfer
To underload phase, make three-phase load close to balance；Communication module has RS232 communication interface, RS485 communication interface, electric power
Carrier communication interface, small wireless communication interface, Wi-Fi communication interface, GPRS communication interface, NB-loT communication interface；RS232 is logical
Believe that interface is used for on-site maintenance terminal, the communication between terminal and phase-change switch is logical by RS485 communication interface, power carrier
Letter interface, small wireless communication interface these three modes one kind carry out data transmission, can be between terminal and phase-change switch
Row ad hoc network forms a network control system, and terminal is host, and phase-change switch is slave, and terminal is inquiring phase-change switch
Data can be transferred to distant place main website by GPRS communication interface or NB-loT communication interface after state, it can also be at the scene
It by Wi-Fi communication interface, is connect with mobile phone or plate, carries out real-time Data Transmission and maintenance.
This controlling terminal is mounted on distribution low-voltage side, meets every demand of three-phase imbalance monitoring；
Main control chip: it uses ARM latest generation embedded system kernel Cortex-M4 for system CPU, is three-phase imbalance
The core of monitor terminal controls all circuit coordinates work, carries out signal acquisition calculating, parameter storage, the control of phase-change switch
The work such as system, group-net communication, data transmission.
System power supply module: using Switching Power Supply, provide system power supply, have voltage monitoring circuit, can be in main work electricity
Source automatically saves all significant datas when interrupting, and sends initiative alarming to backstage.
Three-phase voltage current signal sampling computing module: acquisition three-phase voltage current signal in real time calculates three-phase voltage, electricity
Stream, power factor, active power, reactive power, apparent energy, frequency, three-phase imbalance rate, total harmonic distortion, electricity
Flow the various real-time electric power parameters such as total harmonic distortion.
Memory module: selecting the parallel FLASH of large capacity, records three-phase voltage, electric current, active power, reactive power, power
Factor and the handover event of phase-change switch etc..The memory module can recorde the historical data and historical information of at least half a year.
Historical data can record the data such as integral point, voltage all day, electric current, power factor, three-phase imbalance rate, also can be set into every
Data of 15 minutes or 30 minutes records.Historical information includes the switching record of phase-change switch, the operation exception letter occurred
Breath etc..
Communication module: 1, having RS232 communication interface, and communication speed can be set, and communicates for terminal maintenance；2, have
RS485 communication interface, power line carrier, PLC interface, small wireless communication interface, by this thrin, terminal sends control life
It enables, phase-change switch is controlled；3, there is GPRS communication interface, NB-loT communication interface, by one of the two, can with it is remote
Square main website is attached.4, there is Wi-Fi communication interface, can connect with mobile phone or tablet device, be counted in real time at the scene
According to transmission and maintenance.
Liquid crystal display and keyboard input module: it is to provide user and checks data and the man-machine interface of parameter is set, using liquid
Crystalline substance display, and there are multiple keys.There are four LED lights for band, respectively indicate operating status, alarm status, 1 and of communications status
Communications status 2.
Watchdog circuit: can detect the operating condition of terminal in time, once the system reset out of control that can carry out automatically is without shadow
Ring the normal operation of terminal.
Claims (4)
1. a kind of for administering the controlling terminal of distribution three-phase load unbalance, it is characterised in that: including main control chip, three-phase electricity
Current voltage signal sampling computing module, system power supply module, checks data for user and the liquid crystal of parameter is arranged at memory module
Display and keyboard input module, communication module, the watchdog circuit for detecting terminal operating situation in time and to control eventually
End provides the RTC clock of accurate time reference, and three phase transmission line road is provided with multiple phase-change switches, controlling terminal voltage input
End is connect with the system power supply module, installs voltage transformer in the voltage input end, it is mutual that current input terminal installs electric current
Sensor, the voltage transformer and current transformer connect with the sampling unit of three-phase voltage current signal sampling computing module respectively
It connects；The sampling unit is connect with the computing unit of three-phase voltage current signal sampling computing module, the three-phase voltage current
Signal sampling computing module is connected with the main control chip；The main control chip and the memory module, liquid crystal display and key
Input module, communication module, watchdog circuit are connected with RTC clock；
The main control chip is connect with multiple phase-change switches, distant place main website and user terminal respectively by communication module；
Three-phase voltage current signal sampling computing module acquires the three-phase voltage current signal of distribution transformer low-pressure side simultaneously in real time
Three-phase imbalance rate is calculated, when three-phase imbalance rate is more than setting limit value, the main control chip is controlled by communication module
Corresponding phase-change switch movement, makes single-phase load mutually be transferred to underload phase from high load capacity, so that three-phase load is close to flat
Weighing apparatus；After inquiring phase-change switch state, distant place main website is transferred data to by communication module, it can also be at the scene by logical
Letter module is connect with user terminal, carries out real-time Data Transmission and maintenance.
2. as described in claim 1 a kind of for administering the controlling terminal of distribution three-phase load unbalance, it is characterised in that: institute
Communication module is stated equipped with communication interface, the communication interface includes that RS232 communication interface, RS485 communication interface, small wireless are logical
Believe interface, power line carrier, PLC interface, NB-loT communication interface, GPRS communication interface, Wi-Fi communication interface；The master control core
Piece by RS485 communication interface, small wireless communication interface, three kinds of communication modes of power line carrier, PLC interface one of which with it is more
The connection of a phase-change switch, the main control chip pass through its in two kinds of NB-loT communication interface, GPRS communication interface communication modes
Middle one kind is connect with distant place main website, and the Wi-Fi communication interface is connect with user terminal, and the user terminal is mobile phone or puts down
Plate.
3. as claimed in claim 1 or 2 a kind of for administering the controlling terminal of distribution three-phase load unbalance, feature exists
In: the main control chip uses ARM latest generation embedded system kernel Cortex-M4.
4. as claimed in claim 1 or 2 a kind of for administering the controlling terminal of distribution three-phase load unbalance, feature exists
In: there are four LED lights for the liquid crystal display and keyboard input module setting, respectively indicate operating status, alarm status, lead to
Letter state 1 and communications status 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821517243.2U CN208923837U (en) | 2018-09-17 | 2018-09-17 | It is a kind of for administering the controlling terminal of distribution three-phase load unbalance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821517243.2U CN208923837U (en) | 2018-09-17 | 2018-09-17 | It is a kind of for administering the controlling terminal of distribution three-phase load unbalance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208923837U true CN208923837U (en) | 2019-05-31 |
Family
ID=66705834
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821517243.2U Expired - Fee Related CN208923837U (en) | 2018-09-17 | 2018-09-17 | It is a kind of for administering the controlling terminal of distribution three-phase load unbalance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208923837U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112798877A (en) * | 2020-12-29 | 2021-05-14 | 广东电网有限责任公司 | Three-phase current unbalance warning device |
-
2018
- 2018-09-17 CN CN201821517243.2U patent/CN208923837U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112798877A (en) * | 2020-12-29 | 2021-05-14 | 广东电网有限责任公司 | Three-phase current unbalance warning device |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190531 Termination date: 20210917 |