CN108023359A - A kind of power distribution automation three-phase imbalance automatic regulating system - Google Patents
A kind of power distribution automation three-phase imbalance automatic regulating system Download PDFInfo
- Publication number
- CN108023359A CN108023359A CN201610976978.0A CN201610976978A CN108023359A CN 108023359 A CN108023359 A CN 108023359A CN 201610976978 A CN201610976978 A CN 201610976978A CN 108023359 A CN108023359 A CN 108023359A
- Authority
- CN
- China
- Prior art keywords
- building body
- phase
- pours
- mutual inductor
- zero sequence
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
- H01F2038/305—Constructions with toroidal magnetic core
-
- 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
The invention discloses a kind of power distribution automation three-phase imbalance automatic regulating system, including zero sequence current mutual inductor, switch, driving unit, feedback unit, amplifying unit and microcontroller, zero sequence current mutual inductor is open-close type zero sequence current mutual inductor, the mutual inductor includes base, is arranged on base and pours building body, the method have the benefit that：Branch specific electric load can be made to reach balance, and then ensure the balancing the load of main line by adjusting the phase line of single-phase user, three-phase load unbalance rate is reduced, low-voltage circuit electric current is effectively balanced, solves the problems, such as that the inclined big pressure drop of load phase current is high, so as to improve terminal voltage, line loss is reduced.Zero sequence current mutual inductor it is compact-sized, small, consumptive material dosage is few, light-weight, installs and uses very convenient, has very high economic and practical and promotional value.
Description
Technical field
The present invention relates to a kind of automatic regulating system, more particularly to a kind of power distribution automation three-phase imbalance automatic adjustment system
System.
Background technology
As the improvement of people's living standards, the rising of the power consumption of single-phase user, generally existing taiwan area three-phase is born at present
The unbalanced phenomenon of lotus, distribution transformer three-phase load caused by particularly seasonal, period user power utilization time disunity
Imbalance, voltage offset values increase, voltage waveform produce distortion, and line loss increase, causes former living area electric power system can't bear the heavy load,
Cause large-area power-cuts when serious, the problem of neutral conductor is blown, and some distribution network line terminal voltages are relatively low at present is suitable
It is prominent.To find out its cause, it is due to electric system high pressure threephase generator, the zero-sequencedirectional protection of motor and small grounding current system
The zero sequence current mutual inductor of system ground protection is all the product of closed type, its product is heavy, and volume is big, and consumptive material is more to be caused
, it cannot meet the requirement of people.
The content of the invention
It is an object of the invention to provide a kind of power distribution automation three-phase imbalance automatic regulating system, reduces three-phase load
Unbalance factor, active balance low-voltage circuit electric current, solves the problems, such as that the inclined big pressure drop of load phase current is high, and then improves end electricity
Pressure, reduces line loss, solves shortcoming existing in the prior art.
The present invention adopts the following technical scheme that realization：
A kind of power distribution automation three-phase imbalance automatic regulating system, including zero sequence current mutual inductor, its primary side and three
The three-phase firewire and zero curve of phase power supply are connected, and are respectively equipped with out on the three-phase firewire of the zero sequence current mutual inductor secondary side
Close；Three switches are connected with driving unit；The driving unit is also connected with feedback unit, the feedback unit
And driving unit is connected with microcontroller, the zero sequence current mutual inductor is also connected through amplifying unit with the microcontroller
Connect, the microcontroller is also connected with current signal collecting unit, power supply and communication unit respectively, the current signal collection
Unit is also connected with three-phase firewire respectively, and the communication unit also carries out wireless communication with monitor terminal and is connected, the zero sequence
Current transformer is open-close type zero sequence current mutual inductor, which includes base, is arranged on base and pours building body, its feature
It is：Described pour is provided with annular core in vivo, described to pour under building body pours building body and be located at including superposed first
The second of portion pours building body, and first to pour building body and the second shape for pouring building body be semicircle, and first, which pours building body and second, pours building body
Formed circular after docking, described first, which pours building body and second, pours bail is provided with the outer circumference surface of building body, the clamping
Hoop pours building body and second by first and pours building body and be connected.
Further, the bail is the steel bar of a bending, and the both ends of steel bar are respectively arranged with two pieces of reinforcing plates, add
It is vertical that strong plate with first pours external periphery, is fixed between two pieces of reinforcing plates by fastener, the fastener including baffle,
The fixing bolt being connected with baffle, is cased with compression spring on fixing bolt close to one end of baffle, and fixing bolt order screws in two
In block reinforcing plate, and compress the outer wall that spring is close to one of reinforcing plate.
The method have the benefit that：By adjusting the phase line of single-phase user branch specific electric load can be made to reach balance,
And then ensure the balancing the load of main line, three-phase load unbalance rate is reduced, effectively balances low-voltage circuit electric current, is solved partially
The problem of big pressure drop of load phase current is high, so as to improve terminal voltage, reduces line loss.Zero sequence current mutual inductor it is compact-sized,
Small, consumptive material dosage is few, light-weight, installs and uses very convenient, has very high economic and practical and promotional value.
Brief description of the drawings
Fig. 1 is the principle schematic of three-phase load unbalance automatic regulating system.
Fig. 2 is the structure diagram of zero sequence current mutual inductor.
Fig. 3 is that Fig. 2 is side view.
Embodiment
By the following description to embodiment, it will more contribute to public understanding of the invention, but can't should be by Shen
Given specific embodiment of asking someone is considered as the limitation to technical solution of the present invention, any definition to component or technical characteristic
Be changed and/or make form to overall structure and immaterial conversion is regarded as what technical scheme was limited
Protection domain.
Three-phase load unbalance automatic regulating system includes zero sequence current mutual inductor 1, the primary side of zero sequence current mutual inductor 1
It is connected with the three-phase firewire L1~L3 and zero curve N of three phase mains, the three-phase firewire L1 of 1 secondary side of zero sequence current mutual inductor~
First switch K1, second switch K2, the 3rd switch K3 are respectively equipped with L3, the logical of three-phase firewire is controlled by above three switch
It is disconnected；Three switch K1~K3 are connected with driving unit 4, control three switch K1~K3 to carry out break-make by driving unit 4
Action；Driving unit 4 is also connected with feedback unit 3, and feedback unit 3 and driving unit 4 are connected with microcontroller 5；Zero
Sequence current transformer 1 is also connected through amplifying unit 2 with microcontroller 5；Microcontroller 5 also respectively with current signal collecting unit 6, electricity
Source 7 and communication unit 8 are connected；Current signal collecting unit 6 is also connected with three-phase firewire L1~L3 respectively, communication unit
8 also carry out wireless communication with monitor terminal 9 is connected, and wherein communication unit 8 can use micropower wireless communication module.Specific
In application process, current signal collecting unit 6 gathers the current information on three-phase firewire L1~L3, and above- mentioned information is sent to
In microcontroller 5, microcontroller 5 provides power supply by power supply 7, and when the overload on a certain phase firewire, microcontroller 5 can trigger driving
Unit 4, driving unit 4 can be by switching off on the phase firewire, and at the same time, driving unit 4 can send out above-mentioned drive signal
Send to feedback unit 3, feedback unit 3 and then above-mentioned drive signal is sent in microcontroller 5 so that microcontroller 5 confirms that this is negative
After carrying overweight phase line cut-out, microcontroller 5 just understands output control signal so that the closure conducting of 4 driving switch of driving unit needs to connect
The phase line connect, is single-phase customer power supply to ensure that the same time can only connect a phase firewire.
Three-phase load unbalance automatic regulating system can realize earth leakage protective, and specific principle is zero sequence current mutual inductor
1 is used to detect electric leakage signal, and above-mentioned electric leakage signal is amplified through amplifying unit 2, and then is transmitted to microcontroller 5, monolithic
The meeting trigger drive unit 4 of machine 5 disconnects the phase line of above-mentioned electric leakage.Three-phase load unbalance automatic regulating system can also be by remote
Automatic commutation is realized in process control, and monitor terminal 9 sends commutation instruction, which is transmitted to communication unit by communication
8, and then microcontroller 5 is transmitted to, microcontroller 5 can control driving unit 4 to carry out commutation action according to above-metioned instruction.Three-phase load is not
Balance automatic regulating system is suitable for the taiwan area that three-phase and four-line has covered, and by adjusting the phase line of single-phase user, makes branch specific electric load
Reach balance, and then ensure the balancing the load of main line, reduce three-phase load unbalance rate, effectively balance low-voltage circuit electricity
Stream, solves the problems, such as that the inclined big pressure drop of load phase current is high, so as to improve terminal voltage, reduces line loss.
Shown in Fig. 2 and Fig. 3 is improved zero sequence current mutual inductor, including base 10, is arranged on pouring on base 10
Building body, pours and is provided with annular core in vivo, pours building body and pours building body 9 including superposed first and poured positioned at the second of lower part
Building body 12, first to pour building body 11 and the second shape for pouring building body 12 be semicircle；First, which pours building body 11 and second, pours building body 12
Formed circular after docking, first, which pours building body 11 and second, pours bail 13, bail are provided with the outer circumference surface of building body 12
13 pour building body 11 and second by first pours building body 12 and is connected.Bail 13 is the steel bar of a bending, and the both ends of steel bar are divided
It is not provided with two pieces of reinforcing plates 14, it is vertical that reinforcing plate 14 with first pours 11 outer circumference surface of building body, passes through between two pieces of reinforcing plates 14
Fastener is fixed.Fastener includes baffle 15, the fixing bolt 16 that is connected with baffle 15, close baffle 15 on fixing bolt 16
One end is cased with compression spring 17, and fixing bolt 15 sequentially screws in two pieces of reinforcing plates 14, and compression spring 17 be close to it is one of
The outer wall of reinforcing plate 14.First pours building body 11 and the second outer wall surface for pouring building body 12 is provided with connector, and first pours building body 11
And second pour between building body 12 through connector screw connection.The circular outside diameter for pouring building body is formed after docking to be
180-200mm, it can be 80-120mm that the circular interior circular diameter for pouring building body is formed after docking.
Certainly, the present invention can also have other various embodiments, in the case of without departing substantially from spirit of the invention and its essence,
Those skilled in the art can make according to the present invention it is various it is corresponding change and deformation, but these it is corresponding change and
Deformation should all belong to the protection domain of appended claims of the invention.
Claims (2)
1. a kind of power distribution automation three-phase imbalance automatic regulating system, including zero sequence current mutual inductor, its primary side and three-phase
The three-phase firewire and zero curve of power supply are connected, and are respectively equipped with out on the three-phase firewire of the zero sequence current mutual inductor secondary side
Close；Three switches are connected with driving unit；The driving unit is also connected with feedback unit, the feedback unit
And driving unit is connected with microcontroller, the zero sequence current mutual inductor is also connected through amplifying unit with the microcontroller
Connect, the microcontroller is also connected with current signal collecting unit, power supply and communication unit respectively, the current signal collection
Unit is also connected with three-phase firewire respectively, and the communication unit also carries out wireless communication with monitor terminal and is connected, the zero sequence
Current transformer is open-close type zero sequence current mutual inductor, which includes base, is arranged on base and pours building body, its feature
It is：Described pour is provided with annular core in vivo, described to pour under building body pours building body and be located at including superposed first
The second of portion pours building body, and first to pour building body and the second shape for pouring building body be semicircle, and first, which pours building body and second, pours building body
Formed circular after docking, described first, which pours building body and second, pours bail is provided with the outer circumference surface of building body, the clamping
Hoop pours building body and second by first and pours building body and be connected.
2. power distribution automation three-phase imbalance automatic regulating system according to claim 1, it is characterised in that the clamping
The steel bar for a bending is bound round, the both ends of steel bar are respectively arranged with two pieces of reinforcing plates, and reinforcing plate and first pours external periphery
Vertically, fixed between two pieces of reinforcing plates by fastener, the fixing bolt that the fastener includes baffle, is connected with baffle, Gu
Determine to be cased with compression spring close to one end of baffle on bolt, fixing bolt order is screwed in two pieces of reinforcing plates, and it is tight to compress spring
Paste the outer wall of one of reinforcing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610976978.0A CN108023359A (en) | 2016-11-03 | 2016-11-03 | A kind of power distribution automation three-phase imbalance automatic regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610976978.0A CN108023359A (en) | 2016-11-03 | 2016-11-03 | A kind of power distribution automation three-phase imbalance automatic regulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108023359A true CN108023359A (en) | 2018-05-11 |
Family
ID=62083615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610976978.0A Pending CN108023359A (en) | 2016-11-03 | 2016-11-03 | A kind of power distribution automation three-phase imbalance automatic regulating system |
Country Status (1)
| Country | Link |
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| CN (1) | CN108023359A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109802407A (en) * | 2019-01-14 | 2019-05-24 | 国网江西省电力有限公司电力科学研究院 | A kind of phase-change switch device and its control method |
| CN111181180A (en) * | 2018-06-07 | 2020-05-19 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase changing system and method for medium and low voltage line |
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| JP3956376B1 (en) * | 2006-08-01 | 2007-08-08 | 株式会社パワーシステム | Capacitor charger |
| CN102623947A (en) * | 2012-03-29 | 2012-08-01 | 临安亿安电力电子科技有限公司 | Leakage protector with phase line switching function |
| CN103077817A (en) * | 2013-01-30 | 2013-05-01 | 杭州大互互感器有限公司 | Opening and closing type zero sequence current mutual inductor |
| CN204651938U (en) * | 2015-06-18 | 2015-09-16 | 国家电网公司 | A kind of three-phase load unbalance automatic regulating system |
| CN105720595A (en) * | 2016-05-02 | 2016-06-29 | 广州开能电气实业有限公司 | Three-phase load unbalance adjustment apparatus |
-
2016
- 2016-11-03 CN CN201610976978.0A patent/CN108023359A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3956376B1 (en) * | 2006-08-01 | 2007-08-08 | 株式会社パワーシステム | Capacitor charger |
| CN102623947A (en) * | 2012-03-29 | 2012-08-01 | 临安亿安电力电子科技有限公司 | Leakage protector with phase line switching function |
| CN103077817A (en) * | 2013-01-30 | 2013-05-01 | 杭州大互互感器有限公司 | Opening and closing type zero sequence current mutual inductor |
| CN204651938U (en) * | 2015-06-18 | 2015-09-16 | 国家电网公司 | A kind of three-phase load unbalance automatic regulating system |
| CN105720595A (en) * | 2016-05-02 | 2016-06-29 | 广州开能电气实业有限公司 | Three-phase load unbalance adjustment apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181180A (en) * | 2018-06-07 | 2020-05-19 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase changing system and method for medium and low voltage line |
| CN111181180B (en) * | 2018-06-07 | 2021-07-27 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase changing system and method for medium and low voltage line |
| CN109802407A (en) * | 2019-01-14 | 2019-05-24 | 国网江西省电力有限公司电力科学研究院 | A kind of phase-change switch device and its control method |
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Application publication date: 20180511 |