CN110429621A - The apparatus and method of distribution three-phase imbalance are solved without commutation - Google Patents
The apparatus and method of distribution three-phase imbalance are solved without commutation Download PDFInfo
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- CN110429621A CN110429621A CN201910717943.9A CN201910717943A CN110429621A CN 110429621 A CN110429621 A CN 110429621A CN 201910717943 A CN201910717943 A CN 201910717943A CN 110429621 A CN110429621 A CN 110429621A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
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Abstract
The invention discloses the devices that distribution three-phase imbalance is solved without commutation, including distribution bus current detection unit, multiple buses selection control unit and multiple user side detection units, distribution bus current detection unit includes the first controller and the first current transformer connected to it；Bus selection control unit includes the single-pole three-throw switch and third controller of connection, and user side detection unit includes second controller and difference air switch connected to it, the second current transformer；First current transformer is respectively arranged in distribution bus A phase, B phase, C phase；Air switch, the second current transformer are set to single-phase electricity consumption distribution tributary user side；Single-pole three-throw switch is for connecting single-phase electricity consumption distribution branch and distribution bus A phase or B phase or C phase.The invention also discloses a kind of methods for solving distribution three-phase imbalance.Apparatus and method disclosed by the invention can be improved power supply quality, it can be achieved that distribution three phase supply balance.
Description
Technical field
The invention belongs to electric power system power distribution fields, and in particular to without commutation solve distribution three-phase imbalance method with
Device.
Background technique
In the low-voltage distribution network of electric system, three-phase voltage amount is equal in magnitude, and sorts in sequence.Structure between three-phase
At 2 π/3 jiao, such case is referred to as three-phase equilibrium；Conversely, being then referred to as three-phase unbalance system.Distribution power consumer is numerous
And dispersion, the factors such as load characteristic is complicated in addition, electricity consumption simultaneity factor is low, leading to distribution, there are the unbalanced lists of a large amount of spatial and temporal distributions
Phase load, and then most power distribution stations is caused to there are problems that different degrees of three-phase load unbalance.Three-phase load unbalance meeting
Cause line neutral point current potential to deviate, causes line drop and power loss, influence the power supply efficiency of route；Particularly,
For the single-phase user of heavy load phase, be easy to appear low voltage, electric appliance can not normal use the phenomenon that, seriously affect user's
Production and living.
" low-voltage distribution network three-phase load unbalance is excellent for the paper that Chinese periodical " industrial control computer " 32 periodicals in 2019 are stepped on
Change algorithm " using genetic algorithm be iterated optimizing, form the best access phase sequence of each load demand, obtain having both it is scientific,
The three-phase load commutation scheme of validity and economy.Chinese patent " the low-voltage distributing line of Publication No. CN105591396B
Distribution transformer three-phase imbalance guard method and device " disclose a kind of low-voltage distributing line distribution transformer three
Phase imbalance protecting method and device select phase to the three-phase load of low-voltage distributing line according to the size of tri-phase unbalance factor
The Risk-warning rank answered is handled, and can significantly reduce the degree of unbalancedness of three-phase current.Publication No. CN109510218A's
Chinese patent " a kind of three-phase load unbalance regulating system " discloses a kind of three-phase load unbalance regulating system, according to power supply
The voltage and current value of side and load-side controls the work of static synchronous compensator, to make the three-phase load of low-voltage network system
Reach balance." distribution three-phase load is uneven for another paper that Chinese periodical " industrial control computer " 32 periodicals in 2019 are stepped on
The Optimized Operation Study on treatment technology of weighing apparatus " proposes negative based on three-phase is administered using phase-change switch type three-phase load self-checking device
The unbalanced method of lotus devises load Real-Time Scheduling Police for distribution network model, and has studied the target letter of optimization algorithm emphatically
Number reduces phase-change switch unit by three-phase load unbalance degree and line loss with less commutation number.These schemes can one
Determine to solve the problems, such as distribution three-phase imbalance in degree, however require that commutation, there are cutting load operations, to subscriber's side powered quality
It is influenced, i.e., can not avoid commutation completely.
Summary of the invention
Technical problem of the invention is that the existing method for solving three-phase load unbalance requires commutation, and there are cutting loads
Operation, influences subscriber's side powered quality, i.e., can not avoid commutation completely.
Present invention aim to address the above problem, the method and dress that distribution three-phase imbalance is solved without commutation are provided
It sets, not the commutation under on-load state, realizes distribution three phase supply balance.
The technical scheme is that solving the device of distribution three-phase imbalance without commutation, including the inspection of distribution bus current
Unit, multiple buses selection control unit and multiple user side detection units are surveyed, distribution bus current detection unit includes first
Controller and the first current transformer connected to it；Bus selection control unit includes the single-pole three-throw switch and third of connection
Controller, user side detection unit include second controller and air switch connected to it, the second current transformer respectively, the
One controller, second controller are connect with third controller respectively；First current transformer is respectively arranged at distribution bus A phase, B
In phase, C phase；Air switch, the second current transformer are set on single-phase electricity consumption distribution tributary user side；Single-pole three-throw switch is used
In the single-phase electricity consumption distribution branch of connection and distribution bus A phase or B phase or C phase.
Distribution bus current detection unit further includes the first wireless communication module, and it further includes third that bus, which selects control unit,
Wireless communication module, user side detection unit further include the second wireless communication module, and the first controller is through the first wireless telecommunications mould
Block, third wireless communication module are connect with third controller, and second controller is through the second wireless communication module, third wireless telecommunications
Module is connect with third controller, the first wireless communication module, the second wireless communication module respectively through wireless network and third without
The connection of line communication module.
Further, first wireless communication module, the second wireless communication module are respectively through Zigbee network and third
Wireless communication module connection.
The method for solving distribution three-phase imbalance using the device for solving distribution three-phase imbalance without commutation, including it is following
Step,
Step 1: according to the electricity consumption needs of the user side of single-phase user's distribution branch, being manually closed the sky of single-phase electricity consumption distribution branch
Air switch closure information is sent to bus selection control unit by air cock, user side detection unit；
Step 2: bus selects control unit and distribution bus current detection unit to communicate, and distribution bus current detection unit passes through
Electric current in the acquisition of first current transformer and more current distribution bus A phase, B phase, C phase, it is assumed that the smallest electric current is X phase, by X
The information of phase is sent to bus selection control unit；
Step 3: bus selection control unit control single-pole three-throw switch is connected with X, powers for single-phase user's distribution branch；
Step 4: user side detection unit detects the electric current of single-phase electricity consumption distribution branch by the second current transformer, if setting
The electric current of the single-phase electricity consumption distribution branch detected in time cycle is 0, then controls air switch disconnection, air switch is disconnected
Information is sent to bus selection control unit；
Step 5: bus selection control unit receives air switch and disconnects information, and control single-pole three-throw switch disconnects, stopping pair
Single-phase electricity consumption distribution branch power supply.
In step 4, the time cycle set is 1 minute.
Compared with prior art, the apparatus and method that distribution three-phase imbalance is solved without commutation of offer of the invention, can
It realizes distribution three phase supply balance, and does not need to carry out commutation operation under on-load state, can be improved power supply quality.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 solves the structural schematic diagram of the device of distribution three-phase imbalance without commutation.
Fig. 2 is the circuit structure block diagram that the device of distribution three-phase imbalance is solved without commutation.
Fig. 3 is the flow chart that the method for distribution three-phase imbalance is solved without commutation.
Description of symbols: distribution bus current detection unit 1, the first current transformer 101, the first controller 102, the
One wireless communication module 103；User side detection unit 2, air switch 201, second controller 202, the second wireless communication module
203, the second current transformer 204；Bus select control unit 3, single-pole three-throw switch 301, second controller 302, third without
Line communication module 303.
Specific embodiment
As depicted in figs. 1 and 2, the device of distribution three-phase imbalance, including the detection of distribution bus current are solved without commutation
1,3 bus of unit selects control unit 3 and 3 user side detection unit 2, and distribution bus current detection unit 1 includes first
Controller 102 and 3 the first current transformers 101 connected to it, the first wireless communication module 103；Bus selection control is single
Member 3 includes sequentially connected single-pole three-throw switch 301, third controller 302, third wireless communication module 303, user side detection
Unit 2 includes second controller 202 and difference air switch 201 connected to it, the second current transformer 204, second is wireless
Communication module 203；3 the first current transformers 101 are respectively arranged in distribution bus A phase, B phase, C phase, the first Current Mutual Inductance
Device 101 is connected to the first controller 102 through converter；Air switch 201, the second current transformer 204 are set to single-phase use
Electric distribution tributary user side, the connection of air switch 201 control terminal and second controller 202, the second current transformer 204 is through AD
Converter is connected to second controller 202；Single-pole three-throw switch 301 is for connecting single-phase electricity consumption distribution branch and distribution bus A
Phase or B phase or C phase, the control terminal of single-pole three-throw switch 301 are connect with 302 control signal output of third controller.First nothing
Line communication module 103, the second wireless communication module 203 are connect through Zigbee network with third wireless communication module 303 respectively.
As shown in figure 3, solving distribution three-phase imbalance using the above-mentioned device for solving distribution three-phase imbalance without commutation
Method, include the following steps,
Step 1: according to the electricity consumption needs of the user side of single-phase user's distribution branch, the sky of the single-phase electricity consumption distribution branch of manual closing
The closure information of air switch 201 is sent to bus selection control unit 3 by air cock 201, user side detection unit 2；
Step 2: bus selects control unit 3 and distribution bus current detection unit 1 to communicate, distribution bus current detection unit 1
Pass through electric current in the acquisition of the first current transformer 101 and more current distribution bus A phase, B phase, C phase, it is assumed that electric current is the smallest to be
The information of X phase is sent to bus selection control unit 3 by X phase；
Step 3: bus selection control unit 3 controls single-pole three-throw switch 301 and is connected with X, supplies for single-phase user's distribution branch
Electricity；
Step 4: user side detection unit 2 detects the electric current of single-phase electricity consumption distribution branch by the second current transformer 204, if 1
The electric current of the single-phase electricity consumption distribution branch detected in minute is 0, then controls the disconnection of air switch 201, air switch 201 is disconnected
Information be sent to bus selection control unit 3；
Step 5: bus selection control unit 3 receives air switch 201 and disconnects information, and control single-pole three-throw switch 301 disconnects,
Stop powering to single-phase electricity consumption distribution branch.
In a kind of embodiment, 301 model SKY13317-373LF of single-pole three-throw switch, 201 model of air switch
ZJSB9-80Z.First controller 102, second controller 202, third controller 302 are all made of embeded processor.First nothing
Line communication module 103, the second wireless communication module 203, third wireless communication module 303 are all made of TI CC2530 chip.
Claims (5)
1. solving the device of distribution three-phase imbalance without commutation, which is characterized in that including distribution bus current detection unit, more
A bus selection control unit and multiple user side detection units, distribution bus current detection unit include the first controller and with
Its first current transformer connected；Bus selection control unit includes the single-pole three-throw switch and third controller of connection, is used
Family side detection unit includes second controller and air switch connected to it, the second current transformer respectively, the first controller,
Second controller is connect with third controller respectively；First current transformer is respectively arranged in distribution bus A phase, B phase, C phase；
Air switch, the second current transformer are set on single-phase electricity consumption distribution tributary user side；Single-pole three-throw switch is for connecting list
Phase electricity consumption distribution branch and distribution bus A phase or B phase or C phase.
2. the device according to claim 1 for solving distribution three-phase imbalance without commutation, which is characterized in that distribution bus
Current detecting unit further includes the first wireless communication module, and it further includes third wireless communication module that bus, which selects control unit, is used
Family side detection unit further includes the second wireless communication module, and the first controller is through the first wireless communication module, third wireless telecommunications
Module is connect with third controller, and second controller is controlled through the second wireless communication module, third wireless communication module and third
Device connection, the first wireless communication module, the second wireless communication module are connect through wireless network with third wireless communication module respectively.
3. the device according to claim 2 for solving distribution three-phase imbalance without commutation, which is characterized in that first is wireless
Communication module, the second wireless communication module are connect through Zigbee network with third wireless communication module respectively.
4. solving distribution three using the device for solving distribution three-phase imbalance without commutation described in claim 1-3 any one
Mutually unbalanced method, which is characterized in that include the following steps,
Step 1: according to the electricity consumption needs of the user side of single-phase user's distribution branch, the air for being closed single-phase electricity consumption distribution branch is opened
It closes, air switch closure information is sent to bus selection control unit by user side detection unit；
Step 2: bus selects control unit and distribution bus current detection unit to communicate, and distribution bus current detection unit passes through
Electric current in the acquisition of first current transformer and more current distribution bus A phase, B phase, C phase, it is assumed that the smallest electric current is X phase, by X
The information of phase is sent to bus selection control unit；
Step 3: bus selection control unit control single-pole three-throw switch is connected with X, powers for single-phase user's distribution branch；
Step 4: user side detection unit detects the electric current of single-phase electricity consumption distribution branch by the second current transformer, if setting
The electric current of the single-phase electricity consumption distribution branch detected in time cycle is 0, then controls air switch disconnection, air switch is disconnected
Information is sent to bus selection control unit；
Step 5: bus selection control unit receives air switch and disconnects information, and control single-pole three-throw switch disconnects, stopping pair
Single-phase electricity consumption distribution branch power supply.
5. the method according to claim 4 for solving distribution three-phase imbalance, which is characterized in that in step 4, the setting
Time cycle be 1 minute.
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| CN201910717943.9A CN110429621A (en) | 2019-08-05 | 2019-08-05 | The apparatus and method of distribution three-phase imbalance are solved without commutation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910717943.9A CN110429621A (en) | 2019-08-05 | 2019-08-05 | The apparatus and method of distribution three-phase imbalance are solved without commutation |
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Citations (5)
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| US20040196604A1 (en) * | 2003-04-04 | 2004-10-07 | Tmt & D Corporation | Control system for canceling load unbalance of three-phase circuit |
| CN206461372U (en) * | 2017-02-21 | 2017-09-01 | 浙江亿德科技有限公司 | Power distribution station three-phase load unbalance automatic regulating system |
| CN108092288A (en) * | 2018-01-30 | 2018-05-29 | 西安特锐德智能充电科技有限公司 | Load control unit, AC charging system and control method |
| CN208046249U (en) * | 2018-05-03 | 2018-11-02 | 广东电网有限责任公司 | Three-phase imbalance commutation device |
| CN108964093A (en) * | 2018-06-28 | 2018-12-07 | 国网天津市电力公司电力科学研究院 | The low-voltage distribution network three-phase imbalance governing system and method for phase-change switch clustered control |
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2019
- 2019-08-05 CN CN201910717943.9A patent/CN110429621A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040196604A1 (en) * | 2003-04-04 | 2004-10-07 | Tmt & D Corporation | Control system for canceling load unbalance of three-phase circuit |
| CN206461372U (en) * | 2017-02-21 | 2017-09-01 | 浙江亿德科技有限公司 | Power distribution station three-phase load unbalance automatic regulating system |
| CN108092288A (en) * | 2018-01-30 | 2018-05-29 | 西安特锐德智能充电科技有限公司 | Load control unit, AC charging system and control method |
| CN208046249U (en) * | 2018-05-03 | 2018-11-02 | 广东电网有限责任公司 | Three-phase imbalance commutation device |
| CN108964093A (en) * | 2018-06-28 | 2018-12-07 | 国网天津市电力公司电力科学研究院 | The low-voltage distribution network three-phase imbalance governing system and method for phase-change switch clustered control |
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