CN109995058A - A kind of device and its workflow of the improvement three-phase imbalance for low voltage electric network - Google Patents
A kind of device and its workflow of the improvement three-phase imbalance for low voltage electric network Download PDFInfo
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- CN109995058A CN109995058A CN201910235699.2A CN201910235699A CN109995058A CN 109995058 A CN109995058 A CN 109995058A CN 201910235699 A CN201910235699 A CN 201910235699A CN 109995058 A CN109995058 A CN 109995058A
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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 and its workflow of a kind of improvement three-phase imbalance for low voltage electric network, are to solve the bad problem of existing three-phase imbalance treatment effect.The present invention includes acquisition module, earthing module, central processing unit and compensating module, the acquisition module, earthing module and compensating module are electrically connected with central processing unit, central processing unit includes database and analysis and processing module, analysis and processing module includes coarse adjustment module and fine tuning module, acquisition module includes current acquisition module, voltage acquisition module and load detecting module, coarse adjustment module includes phase-change switch and commutation detection module, and fine tuning module includes rectification module and seamless module.The present invention is compared by calculating real-time tri-phase unbalance factor, then by real-time tri-phase unbalance factor and preset tri-phase unbalance factor, decides whether to adjust, and if necessary to adjust, automatically derived solution, intelligence degree is high, and processing speed is fast, high treating effect.
Description
Technical field
The present invention relates to low voltage electric network field, the device of specifically a kind of improvement three-phase imbalance for low voltage electric network.
Background technique
With the quickening of China's infrastructure, more and more residents can using electric power as oneself domestic energy come
Source.Electric system also increasingly highlights its importance.Electric system is by the links group such as power generation, transmission of electricity, power transformation, distribution and electricity consumption
At power generation and consumption system.The non-renewable energy of nature is converted to electric power by mechanical energy device by it, then transmitted electricity,
Power transformation and distribution supply power to each user.
Low-voltage distribution is the most common distribution system, and low-voltage distribution is become by distribution substation, high-tension distributing line, distribution
Depressor, low-voltage distributing line and corresponding control protection equipment composition, three-phase transformer is the important composition of distribution transformer
Component, so that single-phase load coexists with three-phase load.But in recent years, the problem of three-phase imbalance, highlights, and increases electric energy damage
Consumption, also reduces the utilization rate of distribution transformer, although people reduce the situation of three-phase imbalance using certain measure,
It is to have little effect.
Summary of the invention
It is above-mentioned to solve the purpose of the present invention is to provide a kind of device of improvement three-phase imbalance for low voltage electric network
The problem of being proposed in background technique.
To achieve the above object, the invention provides the following technical scheme:
A kind of device of the improvement three-phase imbalance for low voltage electric network, including acquisition module, earthing module, central processing
Device and compensating module, the acquisition module, earthing module and compensating module are electrically connected with central processing unit, multiple earthing modules
It is evenly distributed between power distribution station and user, central processing unit includes database and analysis and processing module, analysis and processing module packet
Coarse adjustment module and fine tuning module are included, acquisition module includes current acquisition module, voltage acquisition module and load detecting module, coarse adjustment
Module includes phase-change switch and commutation detection module, and fine tuning module includes rectification module and seamless module, and current acquisition module is used
In acquisition real-time current data, voltage acquisition module is for acquiring real-time voltage data, and load detecting module is for acquiring in real time
Loading condition, earthing module are used for protective grounding, and compensating module is used to that output electric current to be adjusted, and flow through circuit output portion
The electric current divided is suitble to loaded work piece, and database is for storing data and counte-rplan, phase-change switch are used to switch different routes
Phase, commutation detection module are used for the output position according to signal detection and control threephase switch, and rectification module is for adjusting route
Current values, seamless module is used to adjust the voltage value of route.
As a further solution of the present invention: acquisition module further includes temperature detecting module, can be to the temperature of each load
Degree is detected, and prevents from guaranteeing because of fire caused by temperature is excessively high using safe.
As a further solution of the present invention: fine tuning module further includes inductor, can be on light unloaded or light load route
Capacity effect make the reactive power in-situ balancing as far as possible in light hours route to reduce Frequency Transient Overvoltage, prevent
The unreasonable voltage's distribiuting for flowing while also mitigating the power loss on route, improve on transmission line of electricity of reactive power.
As a further solution of the present invention: central processing unit is connected by wireless communication module with mobile terminal, people
The degree of three-phase imbalance state can be checked by mobile terminal enquiry line status.
As a further solution of the present invention: wireless communication module includes 3G module, 4G module, bluetooth module and infrared penetrates
Any one in frequency module, people select suitable wireless communication module according to the actual conditions of oneself, applied widely.
As a further solution of the present invention: mobile terminal includes any one in smart phone and laptop,
Market is easily purchased, and applicability is wide.
The workflow of the device of the improvement three-phase imbalance for low voltage electric network, the specific steps are as follows:
Step 1, current acquisition module acquire the real-time current of route, and voltage acquisition module acquires the real-time voltage of route,
Load detecting module acquires the real time load of route, and current acquisition module, voltage acquisition module and load detecting module will acquire
Data be sent to central processing unit；
Step 2, analysis and processing module carry out analytical calculation to the data of acquisition, obtain real-time three-phase imbalance angle value, and
And compare real-time three-phase imbalance angle value and preset three-phase imbalance angle value, if three-phase imbalance angle value is greater than in advance in real time
If three-phase imbalance angle value, analysis and processing module is resolved scheme, phase-change switch, commutation detection module, rectification module, whole
Die block, earthing module and compensating module work according to solution；
Step 3, if three-phase imbalance angle value is greater than preset three-phase imbalance angle value in real time, analysis and processing module is not
It works again.
Compared with prior art, the beneficial effects of the present invention are:
The present invention has rational design, by numerical value such as real-time current, the real-time voltages of detection route and calculates real-time three-phase
Degree of unbalancedness, then real-time tri-phase unbalance factor and preset tri-phase unbalance factor are compared, it decides whether to adjust, if needed
It adjusts, automatically derived solution, intelligence degree is high, and processing speed is fast, high treating effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the device of the improvement three-phase imbalance for low voltage electric network.
Fig. 2 is the structural schematic diagram of acquisition module in the device for the improvement three-phase imbalance of low voltage electric network.
Fig. 3 is the structural schematic diagram of coarse adjustment module in the device for the improvement three-phase imbalance of low voltage electric network.
Fig. 4 is the structural schematic diagram of fine tuning module in the device for the improvement three-phase imbalance of low voltage electric network.
Wherein: 1- acquisition module, 2- current acquisition module, 3- voltage acquisition module, 4- load detecting module, 5- centre
Reason device, 6- earthing module, 7- database, 8- compensating module, 9- analysis and processing module, 10- coarse adjustment module, 11- fine tuning module,
12- phase-change switch, 13- commutation detection module, 14- rectification module, 15- seamless module, 16- temperature detecting module, 17- inductance
Device, 18- wireless communication module, 19- mobile terminal.
Specific embodiment
The technical solution of the patent is explained in further detail With reference to embodiment.
Embodiment 1
A kind of device of the improvement three-phase imbalance for low voltage electric network, including acquisition module 1, earthing module 6, centre
Device 5 and compensating module 8 are managed, the acquisition module 1, earthing module 6 and compensating module 8 are electrically connected with central processing unit 5, multiple
Earthing module 6 is evenly distributed between power distribution station and user, and central processing unit 5 includes database 7 and analysis and processing module 9, is divided
Analysing processing module 9 includes coarse adjustment module 10 and fine tuning module 11, and acquisition module 1 includes current acquisition module 2, voltage acquisition module
3 and load detecting module 4, coarse adjustment module 10 includes phase-change switch 12 and commutation detection module 13, and fine tuning module 11 includes rectification
Module 14 and seamless module 15, current acquisition module 2 is for acquiring real-time current data, and voltage acquisition module 3 is for acquiring reality
When voltage data, for load detecting module 4 for acquiring real time load situation, earthing module 6 is used for protective grounding, compensating module 8
For output electric current to be adjusted, the electric current for flowing through circuit output part is suitble to loaded work piece, and database 7 is for storing number
According to and counte-rplan, phase-change switch 12 be used to switch the phases of different routes, commutation detection module 13 be used for according to signal detection and
The output position of threephase switch is controlled, rectification module 14 is used to adjust the current values of route, and seamless module 15 is for adjusting line
The voltage value on road.
Acquisition module 1 further includes temperature detecting module 16, can be detected to the temperature of each load, is prevented because of temperature
Fire caused by height is spent, is guaranteed using safe.
Fine tuning module 11 further includes inductor 17, can capacity effect on light unloaded or light load route, to reduce work
Frequency transient overvoltage makes the reactive power in-situ balancing as far as possible in light hours route, prevents the unreasonable flowing of reactive power
The power loss on route is also mitigated simultaneously, improves the voltage's distribiuting on transmission line of electricity.
The workflow of the device of the improvement three-phase imbalance for low voltage electric network, the specific steps are as follows:
Step 1, current acquisition module 2 acquire the real-time current of route, and voltage acquisition module 3 acquires the real-time electricity of route
Pressure, load detecting module 4 acquire the real time load of route, and temperature detecting module 16 acquires the real time temperature of route, temperature detection
The data of acquisition are sent to central processing unit by module 16, current acquisition module 2, voltage acquisition module 3 and load detecting module 4
5；
The data of step 2,9 pairs of analysis and processing module acquisitions carry out analytical calculation, obtain real-time three-phase imbalance angle value,
And real-time three-phase imbalance angle value and preset three-phase imbalance angle value are compared, if three-phase imbalance angle value is greater than in real time
Preset three-phase imbalance angle value, analysis and processing module 9 are resolved scheme, phase-change switch 12, commutation detection module 13, rectification
Module 14, seamless module 15, inductor 17, earthing module 6 and compensating module 8 work according to solution；
Step 3, if three-phase imbalance angle value is greater than preset three-phase imbalance angle value in real time, analysis and processing module 9 is not
It works again.
Embodiment 2
A kind of device of the improvement three-phase imbalance for low voltage electric network, including acquisition module 1, earthing module 6, centre
Device 5 and compensating module 8 are managed, the acquisition module 1, earthing module 6 and compensating module 8 are electrically connected with central processing unit 5, multiple
Earthing module 6 is evenly distributed between power distribution station and user, and central processing unit 5 includes database 7 and analysis and processing module 9, is divided
Analysing processing module 9 includes coarse adjustment module 10 and fine tuning module 11, and acquisition module 1 includes current acquisition module 2, voltage acquisition module
3 and load detecting module 4, coarse adjustment module 10 includes phase-change switch 12 and commutation detection module 13, and fine tuning module 11 includes rectification
Module 14 and seamless module 15, current acquisition module 2 is for acquiring real-time current data, and voltage acquisition module 3 is for acquiring reality
When voltage data, for load detecting module 4 for acquiring real time load situation, earthing module 6 is used for protective grounding, compensating module 8
For output electric current to be adjusted, the electric current for flowing through circuit output part is suitble to loaded work piece, and database 7 is for storing number
According to and counte-rplan, phase-change switch 12 be used to switch the phases of different routes, commutation detection module 13 be used for according to signal detection and
The output position of threephase switch is controlled, rectification module 14 is used to adjust the current values of route, and seamless module 15 is for adjusting line
The voltage value on road.
Central processing unit 5 is connected by wireless communication module 18 with mobile terminal 19, and people can pass through mobile terminal 19
Line status is inquired, checks the degree of three-phase imbalance state.
Wireless communication module 18 includes any one in 3G module, 4G module, bluetooth module and infrared radio frequency module, people
Select suitable wireless communication module according to the actual conditions of oneself, it is applied widely.
Mobile terminal 19 includes any one in smart phone and laptop, and market is easily purchased, and applicability is wide.
The workflow of the device of the improvement three-phase imbalance for low voltage electric network, the specific steps are as follows:
Step 1, current acquisition module 2 acquire the real-time current of route, and voltage acquisition module 3 acquires the real-time electricity of route
Pressure, load detecting module 4 acquire the real time load of route, current acquisition module 2, voltage acquisition module 3 and load detecting module 4
The data of acquisition are sent to central processing unit 5；
The data of step 2,9 pairs of analysis and processing module acquisitions carry out analytical calculation, obtain real-time three-phase imbalance angle value,
And real-time three-phase imbalance angle value and preset three-phase imbalance angle value are compared, if three-phase imbalance angle value is greater than in real time
Preset three-phase imbalance angle value, analysis and processing module 9 are resolved scheme, phase-change switch 12, commutation detection module 13, rectification
Module 14, seamless module 15, earthing module 6 and compensating module 8 work according to solution；
Step 3, if three-phase imbalance angle value is greater than preset three-phase imbalance angle value in real time, analysis and processing module 9 is not
It works again；
Step 4, people oneself need to inquire the electric current number of some period of certain section of route in the input of mobile terminal 19
The data such as value, three-phase imbalance angle value, central processing unit 5 receive inquiry request and export corresponding data to mobile terminal
19, people can be obtained by the information of needs, not limited by away from discrete time.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.No
It should treat any reference in the claims as limiting the claims involved.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (7)
1. a kind of device of the improvement three-phase imbalance for low voltage electric network, including acquisition module (1), earthing module (6), center
Processor (5) and compensating module (8), the acquisition module (1), earthing module (6) and compensating module (8) are and central processing unit
(5) it is electrically connected, multiple earthing modules (6) are evenly distributed between power distribution station and user, which is characterized in that central processing unit (5)
Including database (7) and analysis and processing module (9), analysis and processing module (9) includes coarse adjustment module (10) and fine tuning module (11),
Acquisition module (1) includes current acquisition module (2), voltage acquisition module (3) and load detecting module (4), coarse adjustment module (10)
Including phase-change switch (12) and commutation detection module (13), fine tuning module (11) includes rectification module (14) and seamless module
(15)。
2. the device of the improvement three-phase imbalance according to claim 1 for low voltage electric network, which is characterized in that described to adopt
Collecting module (1) further includes temperature detecting module (16).
3. the device of the improvement three-phase imbalance according to claim 1 for low voltage electric network, which is characterized in that described thin
Mode transfer block (11) further includes inductor (17).
4. the device of the improvement three-phase imbalance according to claim 1 for low voltage electric network, which is characterized in that in described
Central processor (5) is connected by wireless communication module (18) with mobile terminal (19).
5. the device of the improvement three-phase imbalance according to claim 4 for low voltage electric network, which is characterized in that the nothing
Line communication module (18) includes any one in 3G module, 4G module, bluetooth module and infrared radio frequency module.
6. the device of the improvement three-phase imbalance according to claim 4 or 5 for low voltage electric network, which is characterized in that institute
Stating mobile terminal (19) includes any one in smart phone and laptop.
7. a kind of workflow of the device of the improvement three-phase imbalance for low voltage electric network as described in claim 1-6 is any
Journey, which is characterized in that specific step is as follows:
Step 1, current acquisition module (2) acquire the real-time current of route, and voltage acquisition module (3) acquires the real-time electricity of route
Pressure, load detecting module (4) acquire the real time load of route, current acquisition module (2), voltage acquisition module (3) and load inspection
It surveys module (4) and the data of acquisition is sent to central processing unit (5)；
Step 2, analysis and processing module (9) carry out analytical calculation to the data of acquisition, obtain real-time three-phase imbalance angle value, and
And compare real-time three-phase imbalance angle value and preset three-phase imbalance angle value, if three-phase imbalance angle value is greater than in advance in real time
If three-phase imbalance angle value, analysis and processing module (9) is resolved scheme, phase-change switch (12), commutation detection module (13),
Rectification module (14), seamless module (15), earthing module (6) and compensating module (8) work according to solution；
Step 3, if three-phase imbalance angle value is greater than preset three-phase imbalance angle value in real time, analysis and processing module (9) is no longer
Work.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023004705A1 (en) * | 2021-07-29 | 2023-02-02 | 西门子股份公司 | Method and apparatus for presenting three-phase imbalance, and computer readable storage medium |
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| CN206820476U (en) * | 2017-06-22 | 2017-12-29 | 南京工程学院 | Realize the miniature photovoltaic DC-to-AC converter networking coordinated control system that three-phase imbalance is administered |
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| WO2023004705A1 (en) * | 2021-07-29 | 2023-02-02 | 西门子股份公司 | Method and apparatus for presenting three-phase imbalance, and computer readable storage medium |
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Application publication date: 20190709 |