CN104852397B - Power load balancing method and device applicable to low-voltage power distribution network - Google Patents
Power load balancing method and device applicable to low-voltage power distribution network Download PDFInfo
- Publication number
- CN104852397B CN104852397B CN201510229917.3A CN201510229917A CN104852397B CN 104852397 B CN104852397 B CN 104852397B CN 201510229917 A CN201510229917 A CN 201510229917A CN 104852397 B CN104852397 B CN 104852397B
- Authority
- CN
- China
- Prior art keywords
- separate
- phase
- low
- electric terminal
- load information
- Prior art date
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000009826 distribution Methods 0.000 title claims abstract description 40
- 238000012545 processing Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims description 12
- 238000012163 sequencing technique Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 27
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 description 38
- 238000011068 loading method Methods 0.000 description 14
- 230000008859 change Effects 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Mobile Radio Communication Systems (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a power load balancing method and device applicable to a low-voltage power distribution network. The device includes phase conversion devices and a control master station; built-in acquisition modules of the phase conversion devices acquire load information connected into each electricity consumption terminal of the low-voltage power distribution network, and transmit the load information to the control master station; the control master station performs computation processing on the load information so as to obtain total load information and three-phase load unbalance degree which are connected into each phase of the low-voltage power distribution network; when three-phase load unbalance occurs, the phase conversion devices transmit phase switching signals, and switch the electricity consumption terminals and make the same connected into the connection phases of the low-voltage power distribution network according to the phase switching signals, so that the load of the electricity consumption terminals can be uniformly distributed on the three phases of the low-voltage power distribution network, and therefore, three-phase load balance of the low-voltage power distribution network can be realized. With the power load balancing method and device of the invention adopted, the load of the electricity consumption terminals can be automatically adjusted between each phase of the low-voltage power distribution network with reliable and continuous power supply ensured, and the three-phase load balance of the low-voltage power distribution network can be realized, and line loss can be effectively reduced, and power supply quality can be improved.
Description
Technical field
The present invention relates to low-voltage network threephase load balancing technique, more particularly to it is a kind of suitable for low-voltage network three-phase
Load dynamic adjustment to realize low-voltage network threephase load low-voltage network electrical load equalization methods in a balanced way, and one
The power load balancer suitable for low-voltage network for being used to realizing the method is planted, the invention belongs to low-voltage network distribution skill
Art field.
Background technology
It is well known that the three-phase current laod unbalance of low-voltage network always perplex power supply unit subject matter it
One, safety and the reliability of low-voltage distribution network directly affect the production and life of power consumer, also affect power department distribution to supply
The safety of electric equipment and itself economic benefit.The load of the distribution transformer of low-voltage network is typically negative with single-phase by threephase load
Mixing composition is carried, residential electricity consumption is single-phase load, and distribution is more complicated, especially a large amount of single-phase loads access low-voltage network
Distribution system, and load is different different with the electricity consumption time, so, three alternate out-of-balance currents of low-voltage network are
Objective reality, and this electricity consumption unbalance condition irregularities, also cannot predict in advance.Result in low-voltage power supply system three
The secular disequilibrium of phase load, makes the three-phase current of low-voltage network more uneven, causes many failures therewith, such as exist
Peak times of power consumption transformator single-phase load is excessive and causes to burn out, the excessive imbalance for causing three-phase excessive of single-phase load, zero line
Failure increases, bulk zone " group's burning " phenomenon happens occasionally, therefore, solve low-voltage distribution network threephase load imbalance problem gesture and exist
Must go, it is particularly important.The maldistribution of the threephase load in low-voltage network, the use of load is asynchronous, randomness is big, makes
Threephase load off-center operation state is in into the distribution transformer moment.This not only increases line loss and distribution loss, also
The imbalance of circuit three-phase voltage can be caused, and threephase load off-center operation has a significant impact to low-voltage network, to electric energy
Quality and power supply quality have a serious impact, while can also accelerate the aging of distribution transforming facility, reduce exerting oneself for distribution transformer
Situation.
From the foregoing, the uneven danger to transformator, electrical equipment and electricity system of the threephase load of electricity system
Evil and impact are extremely serious, especially constitute great obstacle to the abundant effectively utilizes of electric power energy.In supply of electric power
Today in short supply, solve the problems, such as that the three-phase imbalance of electricity system has been extremely urgent task.
State, inside and outside the unbalanced problem of low-voltage network threephase load is conducted in-depth research.Such as external use
Then advanced electronics technology obtains voltage stabilizing unbalanced three-phase current through a series of conversion of exchange → direct current → exchange,
Frequency stabilization, the alternating current of steady phase, drag a threephase generator equivalent to a threephase motor, although can eliminate corresponding electrical network
Out-of-balance current, but it is high cost, expensive, and harmonic pollution is also only applicable to some special small ranges at present than more serious.
Domestic useful single-phase electricity container phase-splitting reactive compensation system is compensated to load, can be fallen reactive current components compensation, and
It is helpless for asymmetric watt current part, the vectorial asymmetric of three-phase current can be made sometimes, is still had on zero line
Suitable electric current flows through, and, neutral-point displacement is still projected, and effect is not ideal enough because of single-phase load change randomness very greatly.Cause
This power supply department can only carry out adjustment of load by the way of artificial separated time, keep the threephase load of low-voltage network as much as possible
Balance.
The content of the invention
For shortcomings present in prior art and deficiency, it is an object of the present invention to provide a kind of be applied to low-voltage distribution
That what is netted can access the separate low-voltage network electrical load equalization methods of low-voltage network access with real-time transform electric terminal.With
Electric terminals access a wherein phase of low-voltage network, the electric terminal that commutation device gathers acquisition module by commutation device
The load information for including electric current, voltage, power etc. be sent to control main website, control main website is believed according to the load of electric terminal
Breath, the three-phase for calculating the total load information, phase average total load breath and low-voltage network of each phase for accessing low-voltage network are born
Degree of unbalancedness is carried, big separate of slave phase total load information is obtained and is switched to the separate separate switching of the little target of phase total load information
Information and needing carries out the electric terminal of separate switching, and is sent to commutation dress the separate separate handover information of target is included
Put；The separate handover information that commutation device is sent according to the control main website for receiving, carries out electric terminal in real time and accesses low-voltage distribution
Net accesses separate handover operation, is distributed in the triple line of low-voltage network as homogeneously as possible using the load of electric terminals,
Realize that low-voltage network threephase load is balanced, effectively reduce line loss, improve power supply quality.
A kind of electrical load equalization methods suitable for low-voltage network of offer are the technical scheme is that, its design will
Point is in comprising the following steps：
Data acquisition, collection access the load information of each electric terminal of low-voltage network；
Data processing, is computed determining the phase that the slave phase total load information of the low-voltage network is big according to the load information
The phase total load of the separate separate handover information of the little target of phase total load information and the separate handover information is not switched to
Need to carry out the electric terminal of separate switching on big separate of information, so that the threephase load balance of low-voltage network；
Separate switching, the access of the electric terminal are separate from the current separate target for being switched to the separate handover information
It is separate.
In the application, the present invention also has preferred technical scheme further below.
Further, the data processing step, specifically includes：
Phase load calculate, according to the load information of each electric terminal calculate low-voltage network each phase it is mutually total
The threephase load degree of unbalancedness of load information and low-voltage network；
It is separate switching determine, if the threephase load degree of unbalancedness of low-voltage network be more than balanced threshold, calculate determine from
Big separate of phase total load information is switched to the separate separate handover information of the little target of phase total load information and described separate cuts
Change information big separate little with the phase total load information target of phase total load information it is separate between need the load information that adjusts
Adjustment magnitude so that low-voltage network threephase load balance；
Electric terminal determines, it is big to the phase total load information of the separate handover information it is separate on electric terminal it is negative
Information carrying breath carry out calculating process obtain this it is separate on need to carry out the electric terminal of separate switching, the load letter of the electric terminal
Breath sum is suitable with the adjustment magnitude, so that the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold.
Further, the separate switching determines that the separate handover information in step is that slave phase total load information is more than phase average
The separate phase total load information that is switched to of total load information is separate less than the target of phase average total load information；
The separate switching determines that the adjustment magnitude in step is phase average total load information and the separate handover information
The big phase of the phase total load information of the difference and the separate handover information of the little separate total load information of phase total load information
Minima in the difference of other total load information and phase average total load information.
Further, the electric terminal determines step, specifically also includes：
Electric terminal sequence sub-step, believes to the phase total load of the separate handover information according to the load information of electric terminal
Breath it is big it is separate on electric terminal be ranked up；
Electric terminal selectes sub-step, sequentially selects electric terminal, make the load information sum of selected electric terminal with
The adjustment magnitude is suitable, so that the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold, and selected electricity consumption
The quantity of terminal is less.
Further, before the separate switching determines step, also walk including pretreatment：The big electricity consumption of multiple load informations
If terminal is concentrated accesses wherein the one of low-voltage network mutually or two-phase, calculate and determine from this and separate be switched to the separate phase of target
Other handover information and be connected to the access it is separate on the electric terminal for needing the load information for carrying out separate switching big, with
Each phase of the load distribution of the electric terminal for making the load information big in low-voltage network.
Further, the load information includes one or two in the electric current and power of the separate and phase.
The present invention also provides a kind of electrical load balancer for being adapted to carry out above-mentioned electrical load equalization methods.It is described
Electrical load balancer, its designing points is, including with lower module：
Data acquisition module, collection access the load information of each electric terminal of low-voltage network；
Data processing module, is computed determining that the slave phase total load information of the low-voltage network is big according to the load information
Separate be switched to the mutually total of the separate separate handover information of the little target of phase total load information and the separate handover information
Need to carry out the electric terminal of separate switching on big separate of load information, so that the threephase load balance of low-voltage network；
Separate handover module, is switched to the separate handover information from currently separate by the access of the electric terminal separate
Target it is separate.
Apparatus of the present invention in the application, also preferred technical scheme further below.
Further, the data processing module is specifically included：
Phase load calculating sub module, calculates each phase of low-voltage network according to the load information of each electric terminal
Phase total load information and low-voltage network threephase load degree of unbalancedness；
Separate switching determination sub-module, if the threephase load degree of unbalancedness of low-voltage network is more than balanced threshold, calculates
Determine that big separate of slave phase total load information is switched to the separate separate handover information of the little target of phase total load information and described
Need to adjust between big separate little with the phase total load information target of the phase total load information of separate handover information is separate is negative
The adjustment magnitude of information carrying breath；
Electric terminal determination sub-module, it is big to the phase total load information of the separate handover information it is separate on electricity consumption end
The load information at end carry out calculate process obtain this it is separate on need to carry out the electric terminal of separate switching, the electric terminal
Load information sum is suitable with the adjustment magnitude, so that the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold.
Further, the separate handover information in the separate switching determination sub-module is that slave phase total load information is more than phase
The separate phase total load information that is switched to of average total load information is separate less than the target of phase average total load information；
Adjustment magnitude in the separate switching determination sub-module is phase average total load information and the separate switching letter
The phase total load information of the difference and the separate handover information of the little separate total load information of the phase total load information of breath is big
Separate total load information and phase average total load information difference in minima.
Further, the electric terminal determination sub-module is specifically included：
Electric terminal sequencing unit, believes to the phase total load of the separate handover information according to the load information of electric terminal
Breath it is big it is separate on electric terminal be ranked up；
Electric terminal selectes unit, sequentially selects electric terminal, make the load information sum of selected electric terminal with
The adjustment magnitude is suitable, so that the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold, and selected electricity consumption
The quantity of terminal is less.
Further, the load information includes one or two in the electric current and power of the separate and phase.
When implementing, electric terminal Jing commutation devices and low-voltage network are electrically connected the present invention.The commutation device it is defeated
The triple line for entering end and low-voltage network is electrically connected, outfan for powering to electric terminal, i.e. electric terminal at any time
A wherein phase of low-voltage network is at most only accessed by commutation device.Commutation device is built by communication channel and control main website
Vertical communication connection, for realizing the data transfer between commutation device and control main website.Commutation device built-in (or external) is used for
Collection electric current, voltage, the acquisition module of power even load information gather the load information of electric terminal, and the load for being gathered
Information is sent to control main website, controls main website and calculated according to the load information for being received to determine on big separate of total load information
Need to carry out the electric terminal of separate switching and the electric terminal separate is switched to the little target of total load information from current
Separate, and be sent to corresponding commutation device the separate separate handover information of target is included, commutation device is according to being received
Access of the separate switching signal to electric terminal it is separate switch over, redistribute the phase that electric terminal accesses low-voltage network
Load, so that the load of electric terminal is uniformly distributed in the triple line of low-voltage network as far as possible, makes low-voltage network
Threephase load degree of unbalancedness be less than balanced threshold, realize low-voltage network threephase load balance.Commutation device using IGBT,
The fully opened type speed-sensitive switch such as IGCT electronic device is constituted, and is realized to electric terminal uninterrupted power supply in separate handoff procedure.
Beneficial effect
Realize that threephase load is balanced, improve the power supply quality of low-voltage network, each of low-voltage network is accessed by gathering
The load information of individual electric terminal, it is computed determining that the big separate upper needs of total load information separate are cut according to the load information
The target access of the electric terminal and the electric terminal that change is separate, is switched to the mesh by the access of the electric terminal separate
Tag splice enter it is separate, electric terminal be supported on low-voltage network three it is alternate be adjusted, using electric terminals load as far as possible
Be uniformly distributed in the triple line of low-voltage network, realize low-voltage network threephase load balance, improve low-voltage distribution
The power supply quality of net.
The three alternate adjust automaticallies for being supported on low-voltage network of electric terminal, without the need for manually participating in, keep low-voltage distribution
The threephase load balance of net, it is ensured that the higher power supply quality of low-voltage network.
Uninterrupted continuous power supply in separate handoff procedure is accessed, by using the fully opened type such as IGBT, IGCT speed-sensitive switch electricity
The commutation device that sub- device is constituted, to electric terminal uninterrupted power supply in separate handoff procedure, keeps electrical equipment just to continue
Often operate.
The threephase load balance of low-voltage network, distribution transformer, the loss of supply line are reduced, and service life extends,
Reduce the operation cost of low-voltage network.
Description of the drawings
A kind of control flow chart of Fig. 1 the inventive method.
Another kind of control flow chart of Fig. 2 the inventive method.
A kind of structural principle block diagram of Fig. 3 apparatus of the present invention.
A kind of control catenation principle figure in Fig. 4 embodiments.
Specific embodiment
In order to illustrate technical scheme and technical purpose, below in conjunction with the accompanying drawings and specific embodiment is to the present invention
It is described further.
(1) the inventive method implement based on hardware configuration
The method of the present invention in force based on a kind of hardware device catenation principle figure, as shown in Figure 3 and Figure 4, including
Control main website, commutation device and communication channel, commutation device set up communication connection by communication channel and control main website, for reality
Data transfer between existing commutation device and control main website.The communication channel is power line carrier, PLC channel, it is not necessary to special cloth
Put communication line, it is possible to reduce the inter-signal interference that radio communication is brought, improve communication quality.Can also using it is wireless or other
Wired communication mode, communication mode are prior art, and here will not be described in further detail.
Reversing arrangement, is built-in with the commutation module and communication module being made up of three groups of solid-state switches.Solid-state switch by
The fully opened type such as IGBT or IGCT solid switch device is constituted.Three wiring respectively with commutation device of one end of three groups of solid-state switches
Input is electrically connected, and three wiring inputs are used for and the triple line of low-voltage network is electrically connected；Three groups of solid-state switches it is another
The single-phase output end of end and reversing arrangement electrically connects, and unidirectional outfan is used for and electric terminal (can be a resident, a use
Electric demand a, it is also possible to electrical equipment) electrical connection, for powering to electric terminal, i.e., described reversing arrangement is three-phase input, list
Phase output device, at most has in three groups of solid-state switches described in any time and only one group solid-state switch conducting, using electric terminals
Access in a wherein phase of low-voltage network, the access for switching electric terminal access low-voltage network is separate, realizes electricity consumption
Being supported on for terminal the three of low-voltage network alternate switches over adjustment.Fast (the switch time millisecond of the switching speed of solid-state switch
Level even Microsecond grade), it is ensured that to electric terminal continued power in separate handoff procedure.
It is the data processing equipment for including arithmetical unit, controller, communication module to control main website, and which has calculation function,
For data operation process, the access for controlling the electric terminal access low-voltage network connected by each commutation device is separate, makes
The load of electric terminal is evenly distributed in the triple line of low-voltage network as much as possible.Control main website can be single-chip microcomputer,
PC or server.
The acquisition module of the commutation device built-in (or external) at electricity consumption end is arranged on, for Jing commutation devices being gathered to electricity consumption
The electric current of terminal conveying, power even load, and the load information for including electric current, the power of the separate and phase of access etc. is passed through
Communication channel is sent to control main website；Control main website carries out calculation process to the load information for receiving, and obtains electric terminal and accesses
The threephase load degree of unbalancedness of the total load information and access low-voltage network of each phase of low-voltage network.Work as low-voltage network
Threephase load uneven (i.e. the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold) when, control main website is computed
Process and generate the separate switching signal of commutation device electrically connected with electric terminal, and by the separate switching signal be sent to
Its corresponding commutation device.Commutation device carries out separate switching according to the separate switching signal for being received, and electric terminal is accessed
The access of low-voltage network it is separate by one it is separate be switched to another separate, the load of each electric terminal distributes as homogeneously as possible
In the triple line of low-voltage network, so that the threephase load balance of low-voltage network.
Low-voltage network refer to be connected to distribution transformer low-pressure side outfan for the supply lines powered to electric terminal
Road, generally comprises basic routing line and branch circuit, the power transmission of low-voltage network adopt the phase line of three-phase four-wire system, i.e., three and
One neutral conductor.Electric terminal is linked in a wherein phase line of low-voltage network by commutation device, and control main website is by changing
The access that phase device control electric terminal accesses low-voltage network is separate, is distributed using the load of electric terminals as homogeneously as possible
In the triple line of low-voltage network, the threephase load balance of low-voltage distribution network is realized.If additionally, control main website only controls certain branch
Commutation device on circuit, then realize the threephase load balance of the Zhi Ganlu.As shown in figure 4, A, B, C three-phase and neutral conductor L tables
Show the supply line of low-voltage network (distribution transformer low-pressure side), for electric service area (such as cell, village or building
Deng) transmit electric power.Electric terminal is linked into by reversing arrangement in a wherein phase of A, B, C three-phase of low-voltage network respectively,
Reversing arrangement provides single phase power supply to electric terminal, and according to the separate switching signal of control main website, switches electric terminal in real time
The access for being linked into low-voltage network is separate, using the load of electric terminals distribute as homogeneously as possible the A of low-voltage network, B,
In the triple line of C, to realize that the threephase load of low-voltage network (or distribution transformer) is balanced.
The threephase load of low-voltage network can not possibly accomplish absolute balance, and threephase load balance herein refers to low pressure
The threephase load degree of unbalancedness of power distribution network is less than degree of balance threshold value.
The computational methods of the threephase load degree of unbalancedness of low-voltage network have various, in the present embodiment using load letter
The separate load that the difference of the separate load information of the separate and load information minimum of breath maximum is maximum with load information is believed
The business of breath, i.e. threephase load degree of unbalancedness=(the maximum separate-load information minimum of load information separate)/load information is most
Big separate * 100%.
(2) electrical load equalization methods
The threephase load of low-voltage network is uneven, mainly by the single-phase load of the electric terminal for accessing low-voltage network
Cause in low-voltage network three-phase maldistribution, degree of unbalancedness dynamic change with the change for loading.The present invention is by real
When monitoring access low-voltage network electric terminal the distribution situation being supported in the triple line of low-voltage network, when described three
The load of the electric terminal being distributed in phase line is uneven and when causing threephase load degree of unbalancedness size balance threshold value, adjust automatically
The electric terminal for accessing low-voltage network is supported on the alternate distribution of low-voltage network three, so that the load of electric terminal is more equal
Distribute in the triple line of low-voltage network evenly, realize the threephase load balance of low-voltage network.
Realize above-mentioned purpose, a kind of electrical load equalization methods suitable for low-voltage network of the present invention, such as Fig. 1 and Tu
Shown in 2, specifically comprise the following steps：
S1 data acquisitions, are distributed in the acquisition module at electricity consumption end (such as current sensor device, voltage sensing device, electric energy meter
Deng) collection access low-voltage network each electric terminal load information.The load information of the electric terminal refers to including this
Electric terminal accesses the access current loading of the separate and electric terminal of low-voltage network, or connecing for electric terminal
Enter the power termination of the separate and electric terminal.The load information of the electric terminal for hereinafter referring to is equal if being not specifically noted
Refer to current loading information, abbreviation current loading.Acquisition module and commutation device electrical connection, commutation device gather acquisition module
Load information is sent to control main website by communication channel.
S2 data storages, control the load that main website receives the electric terminal of each commutation device transmission for being distributed in electricity consumption end
Information, and the record value of each electric terminal being stored in control primary site memory is updated, such as commutation device coding, electric current is born
The records such as load, power termination, the separate, voltage of access, sampling time.
S3 data processings, if the threephase load degree of unbalancedness of low-voltage network is not less than balanced threshold, i.e. low-voltage network
Threephase load it is uneven, then be computed determining the low-voltage network according to the load information of each electric terminal for being stored
Big separate of slave phase total load information is switched to the separate separate handover information of the little target of phase total load information and the phase
Need to carry out the electric terminal of separate switching on big separate of the phase total load information of other handover information, so that low-voltage network
Threephase load is balanced.Wherein, big separate separate as source, the phase total load letter of total load information in the separate handover information
Breath is little separate separate as target；Then the separate handover information can be labeled as (source is separate, and target is separate), and representing needs
The load of a part of electric terminal on phase total load information big source separate is transferred to the little target phase of phase total load information
Do not go up, distributed in the triple line of low-voltage network as homogeneously as possible using the load of electric terminals, so as to access low-voltage distribution
The threephase load balance of net.The step is specifically included：
S31 pretreatment is walked, if the big electric terminal of multiple load informations concentrate access wherein the one of low-voltage network mutually or
In two-phase, such as A phases, then calculate and determine that target is switched to from the access separate (A phases) accesses the separate to (A- of separate (B and C phases)
B, A-C two it is separate to) and the electricity consumption for needing the above-mentioned load information for carrying out separate switching big that is connected in separate (the A phases)
Terminal, so that the big electric terminal of the load information distributes the triple line (A, B, C phase) in low-voltage network as homogeneously as possible
On, make the electric terminal for having load information big in each phase line.After so processing, when the big electric terminal of multiple load informations
After simultaneously switching off with low-voltage network, the harmful effect produced to the load balance of low-voltage network is little, makes low-voltage network three
Phase load still has preferable degree of balance, is unlikely to produce more serious laod unbalance, power supply quality is significantly declined, cause
Power supply is dangerous, and " group's burning " phenomenon etc. such as occurs.The big electric terminal of the load information is referred to and is connected to low-voltage network
When one or several electric terminals in phase are simultaneously switched off, the threephase load that the generation of low-voltage network can be caused more serious is not
Balance.
S32 phase loads are calculated, and each phase of low-voltage network is calculated according to the load information of the electric terminal for being stored
The threephase load degree of unbalancedness of phase total load information, phase average total load information and low-voltage network.The phase of each phase
Total load information refer to by commutation device be linked into this it is separate on each electric terminal load information sum, phase average is total
Load information is that the load of each electric terminal for referring to the accession to low-voltage network should be distributed evenly over low-voltage distribution in theory
Net the load information in each phase, its value be access low-voltage network each electric terminal load information sum three/
One；Threephase load degree of unbalancedness is divided by being supported in the triple line of low-voltage network for the electric terminal for being linked into low-voltage network
With uneven generation, its computing formula is：Threephase load degree of unbalancedness=(the maximum separate-load information of load information is minimum
It is separate)/load information it is maximum separate * 100%.
The separate switchings of S33 determine that the data processing module for controlling main website (can adopt state according to balanced threshold set in advance
Family standard, 15%), the threephase load degree of unbalancedness of above-mentioned low-voltage network judge whether the threephase load of the low-voltage network is put down
Weighing apparatus.If the threephase load degree of unbalancedness of low-voltage network is more than balanced threshold, threephase load is uneven, is computed determining slave phase
Big separate of total load information is switched to the separate separate handover information of the little target of phase total load information, and described separate cuts
Change information big separate little with the phase total load information target of phase total load information it is separate between need the load information that adjusts
Adjustment magnitude so that low-voltage network threephase load balance.The separate handover information represents the mutually total of low-voltage network
The load of the part electric terminal on big separate of load information needs to be transferred to the little target of phase total load information separate.In order to
Convenient data processing, further, the separate handover information is slave phase total load information more than phase average total load information
The separate phase total load information that is switched to is separate less than the target of phase average total load information, and the adjustment magnitude is always born for phase average
Information carrying ceases the difference with the little separate total load information of phase total load information in the separate handover information, and here is designated as the
One difference；Or the adjustment magnitude be the big separate total load information of phase total load information in the separate handover information with
The difference of phase average total load information, here are designated as the second difference.Preferably, to take described first poor for the adjustment magnitude
Minimum value in value, the second difference.Can so avoid on big separate of phase total load information of the separate handover information
It is excessive that the load capacity of electric terminal is adjusted, and causes new threephase load uneven, so as to increase the electricity consumption for needing separate switching
The quantity of terminal.Therefore, separate handover information is separate from the separate target that is switched in source, is labeled as (source is separate, and target is separate),
Represent need the adjustment of load of the part electric terminal on source separate to target it is separate on, wherein, source is separate for phase total load
Information is separate more than phase average total load information, the separate phase that phase average total load information is less than for phase total load information of target
Not.
S34 electric terminals determine, it is big to the phase total load information of the separate handover information it is separate on electric terminal
Load information carry out calculate process obtain need to carry out the electric terminal of separate switching, the use for needing to carry out separate switching
The load information sum of electric terminals is suitable with the adjustment magnitude, so that the threephase load degree of unbalancedness of low-voltage network is less than flat
Weighing apparatus threshold value." the load information sum of electric terminal is suitable with the adjustment magnitude " refers to, when big in total load information
The access of separate selected electric terminal is separate carry out accessing separate switching after, in the triple line of low-voltage network relatively evenly
The load of distribution electric terminal, makes the threephase load degree of unbalancedness of access low-voltage network less than balanced threshold, that is, realizes low
The threephase load balance of press-fitting electrical network.In order to reduce the quantity of the electric terminal for carrying out separate switching, separate switching is reduced to low
The possible harmful effect of press-fitting electrical network, can also be determined using following methods needs to carry out the electric terminal of separate switching.
Electric terminal sorts, and the processing module for controlling main website is believed to the separate switching according to the load information of electric terminal
Electric terminal on big separate of the phase total load information of breath is ranked up, and using descending (can also ascending order) sequence, obtains total
Electric terminal ordered list on big separate of load information；The electric terminal recorded from the top down by the electric terminal ordered list
Load information be sequentially reduced.
Electric terminal is selected, and is controlled the processing module of main website from above-mentioned electric terminal ordered list, is sequentially selected from the top down
One or more electric terminals are selected, makes the load information sum of selected electric terminal suitable with the adjustment magnitude, so that
The threephase load degree of unbalancedness for accessing low-voltage network is less than balanced threshold, so operates, the quantity of selected electric terminal
It is less, it is possible to reduce to need the commutation device quantity of separate switching, reduce due to separate handover operation to low-voltage network can
The disturbing influence of energy.
Control main website it is above-mentioned include target and access separate separate handover information and be sent to corresponding needs carry out
Access the commutation device of the electric terminal of separate switching.
The separate switchings of S4, the commutation device of the electric terminal is according to the separate switching letter from control main website for being received
Breath, the separate target according to above-mentioned separate handover information of access that electric terminal is accessed low-voltage network is separate to carry out separate cutting
Change, so that the Load Balanced for accessing the electric terminal of low-voltage network distributes on the three-phase of low-voltage network, realize that low pressure is matched somebody with somebody
The threephase load balance of electrical network.
(3) electrical load balancer
In order that the threephase load of the low-voltage network of electric terminal access is balanced, one kind of the present invention is above-mentioned for realizing
The electrical load balancer suitable for low-voltage network of electrical load equalization methods, which includes controlling main website, commutation device
And communication channel, the commutation device by communication channel and control main website set up communication connection, for realize commutation device and
Data transfer between control main website, the communication channel are power line carrier, PLC channel, it is not necessary to specific placement communication line, can
To save communication cable, the inter-signal interference that radio communication is brought is reduced, improve communication quality.Can also using it is wireless or other
Wired communication mode, communication mode are prior art.
The electrical load balancer, specifically include data acquisition module, first communication module, separate handover module,
Data memory module, data processing module, second communication module.The data acquisition module, first communication module, separate switching
Module is built in the commutation device；The data memory module, data processing module, second communication module are built in the control
Main website processed；First communication module and second communication module set up communication connection.Each composition of above-mentioned electrical load balancer
Module is respectively as detailed below.
Data acquisition module, collection access the load information of each electric terminal of low-voltage network.Data acquisition module
For one kind in current transducer, voltage transmitter, power transducer (such as electric energy meter), or various.Acquisition module point
In each electric terminal, itself and first communication module are electrically connected cloth.Acquisition module can be mutually integrated with commutation device, it is also possible to and
Which is separately positioned.Preferentially, acquisition module is integrated in inside commutation device, and which includes current transducer, voltage transmitter and work(
Rate transmitter.
First communication module, is built in commutation device, and commutation device gathers acquisition module by first communication module
The load information of electric terminal is sent to control main website, and receives the separate handover information that control main website sends.The load letter
Breath to refer to and access the current loading for accessing the separate and electric terminal of low-voltage network including the electric terminal, or connect
Enter the power termination of the separate and electric terminal.The load information of the electric terminal for hereinafter referring to is equal if being not specifically noted
Refer to current loading information, abbreviation current loading.
Data memory module, is made up of storage medium, such as hard disk, FLASH chip etc., is received for storing control main website
The load information of electric terminal that sends of each commutation device, the information of the electric terminal stored in data memory module includes
The records such as commutation device numbering, user name, current loading, power termination, the separate, voltage of access, sampling time.
Data processing module, includes the data processing equipment of arithmetical unit, controller, can be single-chip microcomputer, or
PC or server, which has calculation function, for data operation process, controls the electric terminal connected by each commutation device
The access for accessing low-voltage network is separate, is evenly distributed in the three-phase of low-voltage network as much as possible using the load of electric terminals
On line, so that the threephase load balance of low-voltage network.Load of the data processing module according to each electric terminal for being stored
Information is computed determining that big separate of slave phase total load information of the low-voltage network is switched to the little target of phase total load information
Need to carry out separate cutting on big separate of the phase total load information of separate separate handover information and the separate handover information
The electric terminal for changing, so that the threephase load balance of low-voltage network.
The data processing module specifically includes following submodule：
Phase load calculating sub module, calculates the every of low-voltage network according to the load information of each electric terminal for being stored
Phase total load information (the phase total load information of phase total load information, B phases such as the A phases of low-voltage network, the phase of C phases of one phase
Total load information), (i.e. the arithmetic of the phase total load sum of the three-phase of A phase, B phase, C phase is put down for the phase average total load information of each phase
Average) and access low-voltage network threephase load degree of unbalancedness；
Separate switching determination sub-module, according to the value of calculation and uneven threshold of the threephase load degree of unbalancedness of low-voltage network
Whether the setting value of value (such as national standard, 15%) balances to the threephase load of the low-voltage network and judges.If low pressure is matched somebody with somebody
The threephase load degree of unbalancedness of electrical network is more than balanced threshold, and the threephase load of low-voltage network is uneven, then calculate and determine slave phase
Big separate of total load information is switched to the separate separate handover information of the little target of phase total load information, and described separate cuts
Change information big separate little with the phase total load information target of phase total load information it is separate between need the load information that adjusts
Adjustment magnitude so that the threephase load degree of unbalancedness of low-voltage network be less than balanced threshold.It is for data processing simplicity, described
Separate handover information is that slave phase total load information is less than more than the separate phase total load information that is switched to of phase average total load information
The target of phase average total load information is separate, and the adjustment magnitude is phase average total load information and the separate handover information
The difference of the little separate total load information of phase total load information, or the adjustment magnitude is the mutually total of the separate handover information
The difference of the big separate total load information of load information and phase average total load information.Preferably, the adjustment magnitude
Take the minima in above two difference.
Electric terminal determination sub-module, it is big to the phase total load information of the separate handover information it is separate on electricity consumption end
The load information at end carry out calculate process obtain this it is separate on need to carry out the electric terminal of separate switching, the electric terminal
Load information sum is suitable with the adjustment magnitude, so that the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold.
The electric terminal determination sub-module is specifically included with lower unit.
Electric terminal sequencing unit, believes to the phase total load of the separate handover information according to the load information of electric terminal
Breath it is big it is separate on electric terminal be ranked up；
Electric terminal selectes unit, sequentially selects electric terminal, make the load information sum of selected electric terminal with
The adjustment magnitude is suitable, so that the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold, and selected electricity consumption
The quantity of terminal is less.
Second communication module, the load letter of the electric terminal gathered by the acquisition module for receiving commutation device transmission
Breath, for accessing the commutation dress that separate separate handover information is sent to corresponding electric terminal electrical connection target is included
Put.
Separate handover module, separate is switched to the separate switching from being currently accessed by the access of the electric terminal separate
The target of information accesses separate.Separate handover module is built-in with three groups of solid-state switches；Solid-state switch is by solid-states such as IGBT or IGCT
Switching device is constituted, and one end of three groups of solid-state switches is electrically connected with three wiring inputs of commutation device respectively, three wiring
Input is used for and the triple line of low-voltage network is electrically connected；The single-phase output of the other end and reversing arrangement of three groups of solid-state switches
End electrical connection, unidirectional outfan is used for and electric terminal is electrically connected.At most have in three groups of solid-state switches described in any time and only
There is one group of solid-state switch conducting, the access for switching electric terminal access low-voltage network is separate, realizes that electric terminal is accessed
The separate switching of low-voltage network.The switching speed of solid-state switch fast (switch time Millisecond even Microsecond grade), it is ensured that in phase
To electric terminal continued power in other handoff procedure.
In order that those skilled in the art are better understood when technical scheme, below with an example to above-mentioned
Inventive method is described further, and the load information in this example is separate and the current loading of the phase (can also be separate and this
The power termination of phase).For convenience, as a example by choosing 10 electric terminals in this example, each electric terminal is respectively by changing
Phase device is accessed in a wherein phase line of low-voltage network, the electric terminal of each electric terminal numbering, is accessed separate, electric current and is born
Carry and the total load information of each phase of low-voltage network is as shown in table 1 below.
| Electric terminal | A phases | B phases | C phases |
| 1 | 10 | ||
| 2 | 18 | ||
| 3 | 5 | ||
| 4 | 7 | ||
| 5 | 17 | ||
| 6 | 17 | ||
| 7 | 3 | ||
| 8 | 5 | ||
| 9 | 30 | ||
| 10 | 8 | ||
| Phase total load | 39 | 65 | 16 |
Table 1
Table 1 shows, after electric terminal is accessed, the phase total load respectively 39 of each phase of A, B, C three-phase of low-voltage network,
65th, 16 unit values, the total load of low-voltage network is the individual unit values of 120 (39+65+16), and the total load of wherein B phases is C phases
4 times, the threephase load degree of unbalancedness of low-voltage network is 75.5%.Due to the big electricity consumption of multiple current loadings (30,17,18)
The B phases of low-voltage network are accessed in termination set, no current loads big electric terminal in C phases.Control main website is being carried out at calculating
Before reason, pretreatment is first carried out, the electric terminal for making current loading big distributes the three-phase in low-voltage network as homogeneously as possible.Control
The data processing module of main website processed is loaded according to the total current of the current loading and each phase of electric terminal, and Jing calculation process is born
The separate needs of access for carrying the big electric terminal 9 (can also be electric terminal 2 and electric terminal 6) of electric current are tangent by current B
Change to and separate C phases are accessed as target, form the separate handover information for separate switching, be designated as 9 (B, C), represent electricity consumption
The separate needs of access of terminal 9 are switched in the separate C phases of target from B phases, and control main website accesses separate (C target is included
Phase) separate handover information be sent to corresponding electric terminal 9 electrical connection commutation device, electric terminal 9 electrical connection commutation
Device separate by current B phase is switched to C phase the access of electric terminal 9 according to the separate handover information for receiving；So process
Afterwards, the big electric terminal of load information distributes A, B, C three-phase in low-voltage network as homogeneously as possible, as shown in table 2 below.
| Electric terminal | A phases | B phases | C phases |
| 1 | 10 | ||
| 2 | 18 | ||
| 3 | 5 | ||
| 4 | 7 | ||
| 5 | 17 | ||
| 6 | 17 |
| 7 | 3 | ||
| 8 | 5 | ||
| 9 | 0 | 30 | |
| 10 | 8 | ||
| Phase total load | 39 | 35 | 46 |
Table 2
The access of electric terminal 9 is separate to be switched to after C phases by B phases, and the total of each phase of A, B, C three-phase of low-voltage network bears
Carry and be respectively 39,35,46 unit values, it is clear that total load of the total load of C phases much larger than B phases, the three-phase of low-voltage network are born
It is 23.9% to carry uneven.Control main website is computed processing, it is determined that being switched to phase total load letter by the big C phases of phase total load information
The little separate handover information of B phases of breath, here are labeled as, separate handover information：(C, B), expression is the part electric terminal of C phases
Load is transferred in B phases；And adjustment magnitude 6 (difference of C phases total current load 46 and phase average current loading 40) individual unit
Value.Electric terminal in the C phases big to phase total load information carries out descending according to the load information of electric terminal and (can also rise
Sequence) sorting operation, the electric terminal ordered list of C phases is obtained, is sequentially selected from the electric terminal ordered list of the C phases from the top down
Electric terminal is selected, makes the load information sum of selected electric terminal suitable with the adjustment magnitude, i.e., selected use
After the separate adjustment of access of electric terminals, the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold.Then electric terminal 3
Current loading and the adjustment magnitude 6 are closest, and electric terminal 3 is the selected electric terminal for needing to carry out separate switching,
3 (C, B) are labeled as, represent that electric terminal 3 is switched to the separate B phases of target access from separate C phases are currently accessed, control main website is bag
The separate handover information that separate (B phases) is accessed containing target is sent to the commutation device of the electrical connection of electric terminal 3, electric terminal 3
It is separate by current C that the commutation device of electrical connection accesses low-voltage network electric terminal according to the separate handover information for being received
B phases are mutually switched to, the threephase load degree of unbalancedness of low-voltage network is 5.9%, reach balance and require, it is as shown in table 3 below.
| Electric terminal | A phases | B phases | C phases |
| 1 | 10 | ||
| 2 | 18 | ||
| 3 | 5 | 0 | |
| 4 | 7 | ||
| 5 | 17 | ||
| 6 | 17 | ||
| 7 | 3 | ||
| 8 | 5 | ||
| 9 | 0 | 30 | |
| 10 | 8 | ||
| Phase total load | 39 | 40 | 41 |
Table 3
When implementing, electric terminal Jing commutation devices and low-voltage network are electrically connected the present invention.The commutation device it is defeated
The triple line for entering end and low-voltage network is electrically connected, outfan for powering to electric terminal, i.e. electric terminal at any time
A wherein phase of low-voltage network is at most only accessed by commutation device.Commutation device is built by communication channel and control main website
Vertical communication connection, for realizing the data transfer between commutation device and control main website.Commutation device built-in (or external) is used for
Collection electric current, voltage, the acquisition module of power even load information gather the load information of electric terminal, and the load for being gathered
Information is sent to control main website, controls main website and calculated according to the load information for being received to determine on big separate of total load information
Need to carry out the electric terminal of separate switching and the electric terminal separate is switched to the little target of total load information from current
Separate, and be sent to corresponding commutation device the separate separate handover information of target is included, commutation device is according to being received
Access of the separate switching signal to electric terminal it is separate switch over, redistribute the phase that electric terminal accesses low-voltage network
Load, so that the load of electric terminal is uniformly distributed in the triple line of low-voltage network as far as possible, makes low-voltage network
Threephase load degree of unbalancedness be less than balanced threshold, realize low-voltage network threephase load balance.Commutation device using IGBT,
The fully opened type speed-sensitive switch such as IGCT electronic device is constituted, and is realized to electric terminal uninterrupted power supply in separate handoff procedure.
Compared to the prior art, the present invention has following technological progress.
1) realize that threephase load is balanced, improve the power supply quality of low-voltage network, low-voltage network is accessed by gathering
The load information of each electric terminal, according to the load information be computed determine total load information it is big it is separate upper needs it is separate
The target access of the electric terminal of switching and the electric terminal is separate, by described in the access of the electric terminal separate being switched to
Target access it is separate, electric terminal be supported on low-voltage network three it is alternate be adjusted, to the greatest extent may be used using the load of electric terminals
Being uniformly distributed in the triple line of low-voltage network for energy, realizes the threephase load balance of low-voltage network, improves low pressure and match somebody with somebody
The power supply quality of electrical network.
2) the three alternate adjust automaticallies for being supported on low-voltage network of electric terminal, without the need for manually participating in, keep low pressure to match somebody with somebody
The threephase load balance of electrical network, it is ensured that the higher power supply quality of low-voltage network.
3) uninterrupted continuous power supply in separate handoff procedure is accessed, by using the fully opened type speed-sensitive switch such as IGBT, IGCT
The commutation device that electronic device is constituted, to electric terminal uninterrupted power supply in separate handoff procedure, keeps electrical equipment to continue
Run well.
4) the threephase load balance of low-voltage network, distribution transformer, the loss of supply line are reduced, and service life is prolonged
It is long, reduce the operation cost of low-voltage network.
Ultimate principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and description this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, the present invention
Claimed scope is by appending claims, description and its equivalent thereof.
Claims (7)
1. a kind of electrical load equalization methods suitable for low-voltage network, it is characterised in that comprise the following steps：
Data acquisition, collection access the load information of each electric terminal of low-voltage network；
Data processing, specifically includes：Phase load is calculated, and calculates low-voltage network according to the load information of each electric terminal
Each phase phase total load information and the threephase load degree of unbalancedness of low-voltage network；Separate switching determines, if low-voltage distribution
The threephase load degree of unbalancedness of net is more than balanced threshold, then calculate and determine that big separate being switched to of slave phase total load information is mutually always born
Information carrying ceases the big separate and phase of phase total load information of the separate separate handover information of little target and the separate handover information
The adjustment magnitude of the load information of adjustment is needed between the little target of total load information is separate, so that the three-phase of low-voltage network is born
Load balance, the separate handover information are that slave phase total load information is switched to mutually total bearing more than the separate of phase average total load information
Information carrying breath is separate less than the target of phase average total load information；The adjustment magnitude is that phase average total load information is separate with described
The difference and the phase total load of the separate handover information of the little separate total load information of the phase total load information of handover information
Minima in the difference of the big separate total load information of information and phase average total load information；Electric terminal determines, to institute
The load information for stating the electric terminal on big separate of phase total load information of separate handover information is carried out calculating and processes that obtain should
Need to carry out the electric terminal of separate switching, the load information sum of the electric terminal and the adjustment magnitude phase on separate
When so that the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold；
Separate switching, the access of the electric terminal are separate from the current separate target phase for being switched to the separate handover information
Not.
2. a kind of electrical load equalization methods suitable for low-voltage network according to claim 1, it is characterised in that institute
State electric terminal and determine step, specifically include：
Electric terminal sequence sub-step is big to the phase total load information of the separate handover information according to the load information of electric terminal
It is separate on electric terminal be ranked up；
Electric terminal selectes sub-step, sequentially selects electric terminal, make the load information sum of selected electric terminal with it is described
Adjustment magnitude is suitable, so that the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold, and selected electric terminal
Quantity it is less.
3. a kind of electrical load equalization methods suitable for low-voltage network according to claim 1, it is characterised in that
Before the separate switching determines step, also walk including pretreatment：If the big electric terminal of multiple load informations is concentrated is accessed low pressure
Wherein the one of power distribution network mutually or two-phase, then calculates and determines from this and separate be switched to the separate separate handover information of target and be connected to
Needing on the access is separate carries out the big electric terminal of the load information of separate switching, so that the load information is big
Each phase of the load distribution of electric terminal in low-voltage network.
4. a kind of electrical load suitable for low-voltage network according to claim requires 1-3 any claims is balanced
Method, it is characterised in that：The load information includes one or two in the electric current and power of the separate and phase.
5. a kind of electrical load balancer suitable for low-voltage network, it is characterised in that include with lower module：
Data acquisition module, collection access the load information of each electric terminal of low-voltage network；
Data processing module, specifically includes, phase load calculating sub module, is calculated according to the load information of each electric terminal
The threephase load degree of unbalancedness of the phase total load information and low-voltage network of each phase of low-voltage network；Separate switching determines son
Module, if the threephase load degree of unbalancedness of low-voltage network is more than balanced threshold, calculates and determines that slave phase total load information is big
The separate phase total load for being switched to the separate separate handover information of the little target of phase total load information and the separate handover information
The adjustment magnitude of load information for adjusting is needed between big separate little with the phase total load information target of information is separate；The phase
Other handover information is separate be switched to phase total load information of the slave phase total load information more than phase average total load information less than phase
The target of average total load information is separate；The adjustment magnitude is the phase of phase average total load information and the separate handover information
Big separate of the phase total load information of the difference and the separate handover information of the little separate total load information of total load information
Total load information and phase average total load information difference in minima；Electric terminal determination sub-module, to described separate
The load information of the electric terminal on big separate of the phase total load information of handover information carry out calculating process obtain this it is separate on
Need to carry out the electric terminal of separate switching, the load information sum of the electric terminal is suitable with the adjustment magnitude, so that
The threephase load degree of unbalancedness of low-voltage network is less than balanced threshold；
Separate handover module, by the access of the electric terminal separate from the current separate mesh for being switched to the separate handover information
Mark is separate.
6. a kind of electrical load balancer suitable for low-voltage network according to claim 5, it is characterised in that：Institute
State electric terminal determination sub-module to specifically include,
Electric terminal sequencing unit is big to the phase total load information of the separate handover information according to the load information of electric terminal
It is separate on electric terminal be ranked up；
Electric terminal selectes unit, sequentially selects electric terminal, make the load information sum of selected electric terminal with it is described
Adjustment magnitude is suitable, so that the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold, and selected electric terminal
Quantity it is less.
7. according to claim require 5 or 6 described in a kind of electrical load balancer suitable for low-voltage network, its feature
It is：The load information includes one or two in the electric current and power of the separate and phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229917.3A CN104852397B (en) | 2015-05-07 | 2015-05-07 | Power load balancing method and device applicable to low-voltage power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229917.3A CN104852397B (en) | 2015-05-07 | 2015-05-07 | Power load balancing method and device applicable to low-voltage power distribution network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104852397A CN104852397A (en) | 2015-08-19 |
| CN104852397B true CN104852397B (en) | 2017-04-19 |
Family
ID=53851836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510229917.3A Expired - Fee Related CN104852397B (en) | 2015-05-07 | 2015-05-07 | Power load balancing method and device applicable to low-voltage power distribution network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104852397B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591813A (en) * | 2017-08-08 | 2018-01-16 | 陈鸽 | A kind of power termination access distribution network method and load-balancing method |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846436A (en) * | 2016-04-12 | 2016-08-10 | 林新欣 | Electric power grid line controlling apparatus |
| CN105846435A (en) * | 2016-04-12 | 2016-08-10 | 林新欣 | Electric power grid line controlling apparatus |
| CN105703372A (en) * | 2016-04-28 | 2016-06-22 | 南京诺联配电科技有限公司 | Automatic balance adjustment method for three-phase load unbalance of low-voltage distribution network |
| CN106684893A (en) * | 2016-12-12 | 2017-05-17 | 国网北京市电力公司 | Three-phase imbalance adjustment control method and control equipment |
| WO2018195538A1 (en) * | 2017-04-21 | 2018-10-25 | Ideal Industries, Inc. | Low voltage power distribution system |
| CN107257135B (en) * | 2017-07-17 | 2020-02-28 | 国网江西省电力公司电力科学研究院 | Method, device and equipment for judging unbalance treatment measures of power distribution area |
| CN107359632B (en) * | 2017-08-08 | 2021-01-08 | 内蒙古电力（集团）有限责任公司内蒙古电力经济技术研究院分公司 | Power load balancing method and device for power distribution network |
| CN110940872B (en) * | 2019-11-02 | 2022-06-21 | 国网上海市电力公司 | Method for analyzing structure and parameters of residential building low-voltage power distribution system by collecting data through HPLC |
| CN112018789B (en) * | 2020-08-28 | 2023-01-20 | 广东电网有限责任公司广州供电局 | Three-phase unbalanced self-adaptive phase-changing system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8156055B2 (en) * | 2009-05-04 | 2012-04-10 | ThinkEco, Inc. | System and method for utility usage, monitoring and management |
| CN102611126B (en) * | 2012-03-13 | 2013-11-20 | 中国计量学院 | Switching method for flexible switching system based on single-phase inverter power source |
| CN103545826B (en) * | 2012-07-09 | 2015-09-16 | 江西龙跃电子科技有限公司 | A kind of low voltage electric load intelligent dispensing system and distribution method |
| CN203951200U (en) * | 2014-07-01 | 2014-11-19 | 国家电网公司 | Three-phase load adjustment System |
| CN104092229B (en) * | 2014-07-14 | 2016-08-24 | 山东卓尔电气有限公司 | Distributed district's branch road three-phase load current balance type monitoring method and supervising device |
-
2015
- 2015-05-07 CN CN201510229917.3A patent/CN104852397B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591813A (en) * | 2017-08-08 | 2018-01-16 | 陈鸽 | A kind of power termination access distribution network method and load-balancing method |
| CN107591813B (en) * | 2017-08-08 | 2021-09-24 | 广西电网有限责任公司 | Power load access power distribution network method and load balancing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104852397A (en) | 2015-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104852397B (en) | Power load balancing method and device applicable to low-voltage power distribution network | |
| CN104852396B (en) | A kind of electrical load equalization methods and its device for low-voltage network | |
| CN104852394B (en) | A kind of equal balance system of electrical load suitable for low-voltage network | |
| CN104852395B (en) | A kind of electrical load equalizing system for low-voltage network | |
| CN104065276B (en) | Method and apparatus for controlling three-phase uninterrupted power supply and three-phase uninterrupted power supply | |
| CN104682407B (en) | Load imbalance compensation system comprising amplitude-limiting controller and amplitude-limiting compensation method | |
| CN106887856A (en) | Three-phase imbalance adjustment control method, device and three-phase imbalance regulating system | |
| CN106505595A (en) | Transmission line of electricity three-phase imbalance governing system and method based on MMC UPFC | |
| CN108683216A (en) | Shunt chopper harmonic power divides equally control method under nonlinear load | |
| WO2013071098A1 (en) | Reactive following for distributed generation and loads of other reactive controller(s) | |
| CN104113078B (en) | The straight drive system of photovoltaic and control method thereof | |
| CN101976851A (en) | Method for improving wireless internet stability of multiple inverters in microgrid by utilizing virtual impedance | |
| CN106816883A (en) | Three-phase imbalance regulating system parallel connection input coefficient, control method and device | |
| CN101969204A (en) | Vector control-based static volt-ampere reactive compensation (SVC) method and device | |
| CN204465011U (en) | Distribution power consumption dynamic optimization bascule | |
| CN109802423A (en) | A kind of single flow interconnection micro-grid system and frequency and voltage control method | |
| CN106712068A (en) | Parallel hybrid DC power transmission system and reactive power regulation optimization method thereof | |
| CN104852388A (en) | Chain SVG device with active filter function | |
| CN105119314B (en) | A kind of dynamic switching method that control is balanced for power unit direct voltage | |
| CN109617113B (en) | Device and method for mutual conversion between direct current power and alternating current power control targets | |
| CN108539769A (en) | A kind of method that electric power electric transformer reduces distribution network voltage unbalance factor | |
| Arnez et al. | Unified power flow controller (UPFC): Its versatility in handling power flow and interaction with the network | |
| CN105071427B (en) | The control method of double-fed fan motor field is isolated in extra-high voltage direct-current access | |
| CN110212545B (en) | Static var generator | |
| CN115800332B (en) | Load adjusting method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200519 Address after: 570125 G-5C, 5D, World Trade Plaza, 2 World Trade East Road, Binhai Road, Haikou, Hainan. Patentee after: Hainan CLP Zhicheng Electric Power Service Co.,Ltd. Address before: The new town of Fengtai County in Anhui province 232170 city of Huainan Chen Xiang Cun Hou Xiang Zi No. 112 Patentee before: Chen Ge |
|
| 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: 20170419 |