CN107846031A - A kind of three-phase load automatic balancing arrangement - Google Patents
A kind of three-phase load automatic balancing arrangement Download PDFInfo
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- CN107846031A CN107846031A CN201711052032.6A CN201711052032A CN107846031A CN 107846031 A CN107846031 A CN 107846031A CN 201711052032 A CN201711052032 A CN 201711052032A CN 107846031 A CN107846031 A CN 107846031A
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- triode thyristor
- bidirectional triode
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- 230000002457 bidirectional effect Effects 0.000 claims description 30
- 238000000819 phase cycle Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a kind of three-phase load automatic balancing arrangement, three-phase load automatic balancing arrangement output end is accessed after being grouped in its three-phase load per phase user, by the load parameter for detecting low-voltage power supply system threephase load and every mutually every group user, it was found that when there is three-phase load serious unbalance loading phenomenon in three-phase load, automatically one group of user in a phase of overload is switched on lighter one of load, realizes the autobalance of three-phase load.
Description
Technical field
The present invention relates to Operation of Electric Systems administrative skill field, particularly a kind of three-phase load automatic balancing arrangement.
Background technology
Due to the continuous improvement of our people's entirety living standard, in places such as residential area, school and centralized office work areas,
The powerful single-phase power load such as air-conditioning, electric heater is continuously increased, make low-voltage power supply system the serious unbalance loading of three-phase load,
The phenomenon of local serious overload occurs often, not only reduces the power supply capacity and power supply quality of electric power system, thus triggers
Electric power system fault, accident are also continuously increased.The balance of existing low-voltage power supply system three-phase load be still according to cutting load testing,
The data of monitoring, it is found that the serious unbalance loading of three-phase load, the phenomenon of local serious overload occurs in low-voltage power supply system, or even trigger
Just carry out manually adjusting balance when electric power system fault, accident, workload is big and efficiency is very low.
The content of the invention
The technical problem to be solved in the present invention is：A kind of three-phase load automatic balancing arrangement is provided, every in three-phase load
Phase user be grouped after access three-phase load automatic balancing arrangement output end, by detect low-voltage power supply system threephase load with
And the load parameter per mutually every group user, when three-phase load serious unbalance loading phenomenon occurs in discovery three-phase load, automatically by overload
A phase in one group of user be switched in the lighter phase of load, realize the autobalance of three-phase load.
Solve above-mentioned technical problem technical scheme be：
A kind of three-phase load automatic balancing arrangement, open by current sensor group, control device, bidirectional triode thyristor group and manually
The composition such as pass, the control device are connected with current sensor group, bidirectional triode thyristor group circuit, and current sensor group detects in real time
Each phase, each user's group current signal and it is converted after be transported in control device, analyzed and processed through control device, when three-phase is born
When unbalance loading and excess load phenomenon occurs in charged current, by controlling bidirectional triode thyristor group to cut one group of user in a phase of excess load
Change in the lighter phase of load, realize the autobalance of three-phase load；The hand switch is by one group in three-phase load
Load is fixedly attached in the corresponding phase sequence of three phase mains.
Further, the bidirectional triode thyristor group is each user's group (such as A1, A2, An) and each phase of three phase mains
Between the one-way SCR of series connection one bidirectional triode thyristor of access or two reverse parallel connections respectively, to wherein connecting user's group
The control pole trigger voltage of one bidirectional triode thyristor is closed down and loads the control pole trigger voltage of another bidirectional triode thyristor, can be incited somebody to action
This user's group is switched on another phase power supply from an original phase power supply.
Further, one branch of bidirectional triode thyristor group that the one-way SCR by two reverse parallel connections forms
Road, when control device power-up is pressed on relay coil, relay contact J closures, reversely penetrating between control pole and negative electrode
Electric current forms trigger voltage each other and turns on the bidirectional triode thyristor group branch road, when control device control relay contact J disconnects
Bidirectional triode thyristor group branch road ends.
The three-phase load automatic balancing arrangement of the present invention compared with prior art, there is following beneficial effect:
1. keeping the poised state of low voltage three-phase load, the reliability of electric power system is improved：
Place in residential area, school and centralized office work area etc. using single phase poaer supply, when low-voltage power supply system is installed
It is the access load for carrying out mean allocation three phase mains in the method for theoretical calculation, and in actual use because resident rises
Occupy difference, the difference being accustomed to using electric device of time, and each electricity consumption place working time in school and centralized office work area,
The difference of appliance power size etc., particularly current powerful single-phase power load are continuously increased, and make low-voltage power supply system
The serious unbalance loading of three-phase load of system, the phenomenon of local serious overload occur often, the low-voltage power system failure that thus triggers,
Accident is also continuously increased.Yet with this serious unbalance loading and the uncertainty of the time of origin of local overload phenomenon, use
Not only workload is big during artificial detection, efficiency is low, and this unbalance loading phenomenon is sometimes also not easy to be found.Therefore, low pressure three
Phase load is all seldom adjusted after mounting, only belongs to the serious unbalance loading of three-phase load, local tight through analysis breaking down
Overload can just carry out this work again in the case of triggering failure., can be by low voltage three-phase using three-phase load automatic balancing arrangement
The sub-load that a phase is overloaded in load automatically switches to a phase of light load, keeps low-voltage power supply system threephase load always
In state in a basic balance, the generation of local heavy overload and failure is avoided, improves the reliability and power supply quality of electric power system.
2. mitigating power network regulation difficulty, power supply quality is improved：
It is general to calculate generating set input generating capacity by three-phase average load in operation of power networks, to keep power network
The stabilization of the equilibrium of supply and demand and voltage.If the serious unbalance loading of the three-phase load of many places low-voltage power supply system, local heavy overload all collect
In in a certain phase of identical, power network will appear from load weight a phase voltage it is relatively low, and in addition two-phase voltage it is higher.Use three-phase
Load automatic balancing arrangement will avoid the generation of this phenomenon, mitigates power network regulation difficulty and improves power supply quality.
Brief description of the drawings
Fig. 1 is three-phase load automatic balancing arrangement structural representation of the present invention；
Fig. 2 is the bidirectional triode thyristor group branch structure schematic diagram of the one-way SCR composition of two reverse parallel connections；
In figure, 1. current sensor groups；2. control device；3. bidirectional triode thyristor group；4. hand switch；VT1, VT2. are controllable
Silicon；J. relay contact.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
A kind of three-phase load automatic balancing arrangement, as shown in figure 1, by current sensor group 1, control device 2, two-way controllable
Silicon group 3 and the grade of hand switch 4 composition, the control device 2 are connected with current sensor group 1, the circuit of bidirectional triode thyristor group 3, electricity
Flow sensor group 1 detect in real time each phase, each user's group current signal and it is converted after be transported in control device 2, through control
Device 2 analyzes and processes, when unbalance loading and excess load phenomenon occurs in three-phase load electric current, by controlling bidirectional triode thyristor group 3 super
One group of user in one phase of load is switched in the lighter phase of load, realizes the autobalance of three-phase load；It is described manual
Switch 4 is that one group of load in three-phase load is fixedly attached in the corresponding phase sequence of three phase mains.
The bidirectional triode thyristor group 3 is gone here and there respectively between each user's group (such as A1, A2, An) and each phase of three phase mains
Couple the one-way SCR into a bidirectional triode thyristor or two reverse parallel connections, it is two-way to wherein connect a user's group one
The control pole trigger voltage of controllable silicon is closed down and loads the control pole trigger voltage of another bidirectional triode thyristor, can be by this user
Group is switched on another phase power supply from an original phase power supply.
The structures of 3 one branch roads of bidirectional triode thyristor group being made up of the one-way SCR of two reverse parallel connections as shown in Fig. 2
When the power-up of control device 2 is pressed on relay coil, relay contact J closures, reversely electricity is penetrated between control pole and negative electrode
Stream forms trigger voltage each other and turns on the bidirectional triode thyristor group 3 branch road VT1, VT2, the control relay contact J of control device 2
Bidirectional triode thyristor group 3 branch road VT1, VT2 end during disconnection.
Claims (3)
1. a kind of three-phase load automatic balancing arrangement, it is characterised in that by current sensor group, control device, bidirectional triode thyristor group
Formed with hand switch etc., the control device is connected with current sensor group, bidirectional triode thyristor group circuit, current sensor group
Detect in real time each phase, each user's group current signal and it is converted after be transported in control device, analyzed and processed through control device,
When unbalance loading and excess load phenomenon occurs in three-phase load electric current, by controlling bidirectional triode thyristor group by one in a phase of excess load
Group user is switched in the lighter phase of load, realizes the autobalance of three-phase load；The hand switch is by three-phase load
In one group of load be fixedly attached in the corresponding phase sequence of three phase mains.
2. three-phase load automatic balancing arrangement according to claim 1, it is characterised in that the bidirectional triode thyristor group is every
Connected respectively between individual user's group (such as A1, A2, An) and each phase of three phase mains one bidirectional triode thyristor of access or two it is anti-
To parallel connection one-way SCR, to wherein connect the control pole trigger voltage of a bidirectional triode thyristor of a user's group close down and
The control pole trigger voltage of another bidirectional triode thyristor is loaded, this user's group can be switched to from an original phase power supply another
On phase power supply.
3. three-phase load automatic balancing arrangement according to claim 2, it is characterised in that described by two reverse parallel connections
One-way SCR composition one branch road of bidirectional triode thyristor group, when control device power-up be pressed on relay coil when, relay
Device contact J is closed, and the reverse penetration current between control pole and negative electrode forms trigger voltage each other and makes the bidirectional triode thyristor group branch
Road turns on, bidirectional triode thyristor group branch road cut-off when control device control relay contact J disconnects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711052032.6A CN107846031A (en) | 2017-10-30 | 2017-10-30 | A kind of three-phase load automatic balancing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711052032.6A CN107846031A (en) | 2017-10-30 | 2017-10-30 | A kind of three-phase load automatic balancing arrangement |
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| Publication Number | Publication Date |
|---|---|
| CN107846031A true CN107846031A (en) | 2018-03-27 |
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| CN201711052032.6A Pending CN107846031A (en) | 2017-10-30 | 2017-10-30 | A kind of three-phase load automatic balancing arrangement |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904270A (en) * | 2012-11-05 | 2013-01-30 | 镇江长河电力技术有限公司 | Three-phase current unbalance adjusting system for power distribution network |
| US20130054204A1 (en) * | 2011-08-26 | 2013-02-28 | Huanguang Zhang | Automatic three-phase unbalanced load compensation experimental device and its control method |
| CN103795076A (en) * | 2014-03-05 | 2014-05-14 | 贾继莹 | Three-phase load automatic balancer and phase changing device thereof |
| CN105305470A (en) * | 2015-08-07 | 2016-02-03 | 北京中电博达科技有限公司 | Low-voltage load balance adjustment device for power distribution network, and automatic phase-change switch |
| CN205583705U (en) * | 2016-04-29 | 2016-09-14 | 广州开能电气实业有限公司 | Three -phase unbalanced load adjusting device's major loop |
| CN207819463U (en) * | 2017-10-30 | 2018-09-04 | 柳州职业技术学院 | A kind of three-phase load automatic balancing arrangement |
-
2017
- 2017-10-30 CN CN201711052032.6A patent/CN107846031A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130054204A1 (en) * | 2011-08-26 | 2013-02-28 | Huanguang Zhang | Automatic three-phase unbalanced load compensation experimental device and its control method |
| CN102904270A (en) * | 2012-11-05 | 2013-01-30 | 镇江长河电力技术有限公司 | Three-phase current unbalance adjusting system for power distribution network |
| CN103795076A (en) * | 2014-03-05 | 2014-05-14 | 贾继莹 | Three-phase load automatic balancer and phase changing device thereof |
| CN105305470A (en) * | 2015-08-07 | 2016-02-03 | 北京中电博达科技有限公司 | Low-voltage load balance adjustment device for power distribution network, and automatic phase-change switch |
| CN205583705U (en) * | 2016-04-29 | 2016-09-14 | 广州开能电气实业有限公司 | Three -phase unbalanced load adjusting device's major loop |
| CN207819463U (en) * | 2017-10-30 | 2018-09-04 | 柳州职业技术学院 | A kind of three-phase load automatic balancing arrangement |
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