CN104852394B - A kind of equal balance system of electrical load suitable for low-voltage network - Google Patents
A kind of equal balance system of electrical load suitable for low-voltage network Download PDFInfo
- Publication number
- CN104852394B CN104852394B CN201510229739.4A CN201510229739A CN104852394B CN 104852394 B CN104852394 B CN 104852394B CN 201510229739 A CN201510229739 A CN 201510229739A CN 104852394 B CN104852394 B CN 104852394B
- Authority
- CN
- China
- Prior art keywords
- separate
- low
- load
- electric terminal
- voltage network
- 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.)
- Active
Links
- 238000012545 processing Methods 0.000 claims abstract description 35
- 238000009826 distribution Methods 0.000 claims abstract description 20
- 238000004364 calculation method Methods 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims description 25
- 230000005611 electricity Effects 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 17
- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012546 transfer 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
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction 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
- 230000009466 transformation Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
-
- H02J13/0013—
-
- 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
-
- 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
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Mobile Radio Communication Systems (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a kind of equal balance systems of the electrical load suitable for low-voltage network, including commutation device, control main website, the three-phase input end and low-voltage network of commutation device are electrically connected, and the load information of electric terminal is sent to control main website by single-phase output end and electric terminal electrical connection；It controls main website and carries out calculation processing, determine on big separate of total load information need to carry out the electric terminal of separate switching and the electric terminal separate be switched to the small separate separate switching signal of total load information from current, and it is sent to corresponding commutation device, the access that commutation device switches electric terminal access low-voltage network according to separate switching signal is separate, the load for redistributing electric terminal, using the more uniform distribution of the load of electric terminals on the three-phase of low-voltage network.The three-phase that is supported on of adjustment electric terminal of the present invention in the case where power supply continues asks distribution, realizes low-voltage network threephase load balance, effectively reduces line loss, improves power supply quality.
Description
Technical field
The present invention relates to the threephase load balancing techniques of low-voltage network, more particularly to one kind adjusting low pressure by dynamic and matching
The equal balance system of electrical load of the threephase load equilibrium of low-voltage network is realized in the alternate load of power grid three, and the invention belongs to low pressure to match
Power grid distribution technique field.
Background technology
It is well known that the load of the distribution transformer of low-voltage network generally mixes group by three-phase load with single-phase load
At residential electricity consumption is single-phase load, and distribution is more complicated, the power distribution system of especially a large amount of single-phase load access low-voltage networks
System, and load difference and electricity consumption time difference, so, three alternate current imbalances in low-voltage network are objective
It is existing, and this electricity consumption unbalance condition irregularities, it can not also predict in advance, be the main of puzzlement power supply unit always
One of problem.The three-phase current laod unbalance of low-voltage network causes many failures, such as in peak times of power consumption transformer therewith
Single-phase load is excessive and causes to burn out, the excessive imbalance for causing three-phase excessive of single-phase load, system zero-line failure increase, bulk zone
Property " group's burning " phenomenon happens occasionally, and therefore, solves the problems, such as that low-voltage distribution network three-phase imbalance is imperative, particularly important.Three-phase four
The distribution of three-phase load is uneven in line power supply system, and the use of load is asynchronous, randomness is big, causes distribution transformer
Moment is in threephase load off-center operation state.This not only increases line loss and distribution loss, can also cause circuit three-phase
The imbalance of voltage, and threephase load off-center operation has a significant impact to low-voltage network, such as to power quality and power supply matter
Amount has a serious impact, while can also accelerate distribution transforming facility aging, reduces the output etc. of distribution transformer.
State inside and outside conducts in-depth research the unbalanced problem of low-voltage network threephase load.As foreign countries use
A series of transformation of the advanced electronics technology unbalanced three-phase current Jing Guo exchange → direct current → exchange, then obtain voltage stabilizing,
Frequency stabilization, steady phase alternating current, be equivalent to threephase motor and drag a threephase generator, although corresponding power grid can be eliminated
Out-of-balance current, but it is of high cost, expensive, and harmonic pollution is also only applicable to certain special small ranges at present than more serious.
Domestic useful single-phase electricity container phase-splitting reactive compensation system compensates load, can compensate by reactive current components, and
It is helpless for asymmetric watt current part, it can make the vector of three-phase current asymmetric sometimes, still have on zero curve
Comparable electric current flows through, and very greatly because of single-phase load variation randomness, neutral-point displacement is still prominent, and effect is not ideal enough.Cause
This power supply department can only carry out adjustment of load by the way of artificial separated time, and influence normal power supply.It can be with there is an urgent need for developing one kind
The alternate load of dynamic adjustment low-voltage network three realizes that the equal balance system of the electrical load of the threephase load equilibrium of low-voltage network will
The threephase load degree of unbalancedness of low-voltage network controls in acceptability limit.
Invention content
For shortcomings existing in the prior art and deficiency, the object of the invention is on big separate of total load information
The load of electric terminal is switched on small separate of total load information, so that the load of the electric terminal of access low-voltage network is most
It may be uniformly distributed in the triple line of low-voltage network, realize the threephase load balance of low-voltage network, effectively reduce line
Damage improves power supply quality.The load of electric terminal from one it is separate on be transferred to it is another it is separate it is upper during, continued power makes
Electrical equipment is uninterruptedly continuously run in separate handoff procedure.
In order to achieve the above purpose, the technical solution of the present invention is to provide a kind of power loads suitable for low-voltage network
Equal balance system is carried, designing points are：
It include commutation device for transmitting electric power to electric terminal and for controlling low-voltage network threephase load balance
Control main website, commutation device and control main website between be communicatively coupled by communication channel, for realizing commutation device and control
Data transmission between main website processed；
Commutation device, three-phase input end is used for and the triple line of low-voltage network is electrically connected, and single-phase output end is used
It is electrically connected in electric terminal, the separate switching that accesses that commutation device accesses low-voltage network for realizing electric terminal is grasped
Make, and the load information of electric terminal is sent to control main website, and receives the separate handover information that control main website is sent；
It controls main website and calculation processing is carried out according to the load information of the electric terminal received, generation needs to carry out separate cut
The access of the access low-voltage network of the electric terminal that changes and the electric terminal is separate, and to be switched to target separate from currently separate
Separate handover information, so that the threephase load balance of low-voltage network, and the separate handover information is sent to corresponding thereto
The commutation device for the electric terminal answered；
Commutation device according to the separate handover information received by electric terminal access low-voltage network access it is separate by
The current separate target for being switched to the separate handover information is separate.
In the application, the present invention also has preferred technical solution further below.
Further, in described " control main website carries out calculation processing according to the load information of the electric terminal received "
" calculation processing " specifically includes：
Phase load calculates, and the phase total load of each phase of low-voltage network is calculated according to the load information of the electric terminal
The threephase load degree of unbalancedness of information and low-voltage network；
Separate handover information, if the threephase load degree of unbalancedness of low-voltage network be more than balanced threshold, calculate determine from
Big separate of total load information is switched to the separate separate handover information of the small target of total load information and total load letter
The adjustment magnitude of the load information adjusted is needed between small separate of the big separate and total load information of breath；
Electric terminal determines, in the electric terminal on big separate of the total load information selection need to carry out separate cut
The electric terminal changed, the sum of load information of selected electric terminal is suitable with the adjustment magnitude, so that low-voltage network
Threephase load degree of unbalancedness be less than balanced threshold.
Further, the separate handover information step, specifically includes：
If the threephase load degree of unbalancedness of low-voltage network is more than balanced threshold, calculates and determine big from total load information
It is separate be switched to the separate separate handover information of the small target of total load information and the total load information it is big it is separate with it is total
The adjustment magnitude of the load information adjusted is needed between small separate of load information；The separate handover information refers to be believed by total load
Breath is separate less than the target of phase average total load information more than the separate total load information that is switched to of phase average total load information, adjusts
Whole magnitude is the phase average total load information separate total load information small with the total load information of the separate handover information
The difference of difference and the big separate total load information and phase average total load information of the total load information of the separate handover information
Minimum value in value.
Further, the electric terminal determines step, further includes specifically：
Electric terminal sequence sub-step, according to the load information of electric terminal to the total load information of the separate handover information
It is big it is separate on electric terminal be ranked up；
Electric terminal select sub-step, sequentially select electric terminal, make the sum of load information 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 smaller.
Further, further include following pretreatment operation before the phase load calculates step：
If the big electric terminal of multiple load informations concentrates wherein a phase or the two-phase of access low-voltage network, calculate true
It is fixed from this it is separate be switched to the separate separate handover information of target and be connected to this it is separate on the separate switching of needs load letter
Big electric terminal is ceased, so that the big electric terminal of load information evenly distributes each phase in low-voltage network.
Further, the commutation device includes：.
Acquisition module, the load information of the commutation device single-phase output end output of acquisition electric terminal connection；
Processing module, for being sent to control main website by communication module after being handled the load information acquired,
The separate handover information from control main website received is executed, commutation module is manipulated and the electric terminal is accessed into low-voltage network
Access it is separate separate by the current separate target being switched to corresponding to separate handover information；
Commutation module, built-in three groups of solid-state switches, any time at most has and only one group of solid-state switch conducting, for real
Current electric terminals access low-voltage network accesses separate handover operation, and one end of three groups of solid-state switches is inputted with three respectively
End electrical connection, the other end and the electrical connection of single-phase output end；
Communication module for commutation device and controls the data transmission between main website, for receiving the transmission of control main website
Separate handover information sends the load information of the electric terminal to control main website.
Further, the control main website includes：
Memory module, the load information for storing the electric terminal that each commutation device received is sent；
Each phase of the low-voltage network is calculated according to the load information of each electric terminal of storage for processing module
Total load information and threephase load degree of unbalancedness；If the threephase load of the low-voltage network is uneven, according to load balance
Policy calculation obtain from big separate of total load information be switched to the separate separate handover information of the small target of total load information and
Described two it is separate between need the adjustment magnitude of the load information adjusted so that the threephase load balance of low-voltage network；According to
The load information of each electric terminal on big separate of the total load information of separate handover information, is computed selection and needs to carry out
The electric terminal of separate switching, the sum of load information of the electric terminal is suitable with the adjustment magnitude, so that low-voltage distribution
The threephase load of net balances, and separate handover information is sent to by communication module the commutation device of corresponding electric terminal；
Communication module, for controlling the data transmission between main website and commutation device, for receiving commutation device transmission
The load information of electric terminal sends separate handover information to commutation device.
Further, the equal balance system of the electrical load further includes load monitoring module：
The load monitoring module is used to monitor the threephase load of low-voltage network, and load monitoring module is low what is acquired
The threephase load information of press-fitting power grid is sent to control main website, controls the processing module of main website according to the low-voltage network received
Threephase load information calculate the threephase load unevenness of low-voltage network, for verifying by the load information of the electric terminal
The low-voltage network threephase load unevenness obtained is calculated, if the difference of two kinds of threephase load unevenness is more than the threshold value of setting,
Then trigger laod unbalance abnormal alarm.
Further, the load information includes one or both of electric current and power and separate mark.
Further, the control main website further includes the load of each electric terminal for storing access low-voltage network
The database of information, it is negative that the database is at least built-in with the exclusive identification code of commutation device, user name, current loading, power
It carries, separate mark, sampling time field.
Technical scheme of the present invention is when implementing, the three-phase input end of commutation device and the three-phase power line of low-voltage network
Electrical connection, single-phase output end and electric terminal electrical connection, for powering to electric terminal, i.e., electric terminal passes through at any time
Commutation device only accesses the phase in the triple line of low-voltage network.Commutation device is established by communication channel and control main website
Communication connection, for realizing the data transmission between commutation device and control main website.(or external) built in commutation device is used to adopt
The load information of the acquisition module acquisition electric terminal of the load informations such as colleeting comb, voltage, power, and the load acquired is believed
Breath is sent to control main website, and the data processing module for controlling main website calculates determining total load information according to the load information received
It is big it is separate on need carry out the electric terminal of separate switching and the electric terminal separate to be switched to total load letter from current
The separate separate handover information of small target is ceased, and the separate handover information is sent to the commutation dress of corresponding electric terminal
It sets, commutation device is switched over according to the separate handover information received is separate to the access of electric terminal access low-voltage network
Operation, redistribute electric terminal low-voltage network phase load so that access low-voltage network electric terminal load
It distributes as homogeneously as possible in the triple line of low-voltage network, keeps the threephase load of access low-voltage network balanced, realize low
It is press-fitted the threephase load balance of power grid, line loss is effectively reduced, improves power supply quality.
Advantageous effect
It realizes that threephase load is balanced, improves the power supply quality of low-voltage network, each of low-voltage network is accessed by acquisition
The load information of a electric terminal is computed big separate of determining total load information according to the load information and upper needs separate cut
The target access of the electric terminal and the electric terminal that change is separate, is cut by commutation device by the access of the electric terminal is separate
Change to that target access is separate, electric terminal be supported on low-voltage network three it is alternate be adjusted, so that access low pressure is matched
The load of the electric terminal of power grid is uniformly distributed in the triple line of low-voltage network as far as possible, realizes low-voltage network
Threephase load balances, and improves the power supply quality of low-voltage network.
The three alternate adjust automaticallies for being supported on low-voltage network of electric terminal are made by commutation device and control master station
The three alternate adjust automaticallies for being supported on low-voltage network of electric terminals are participated in without artificial, keep the three-phase of low-voltage network negative
Carry balance.
Uninterrupted continuous power supply in separate handoff procedure is accessed, by using the fully opened types such as IGBT, IGCT high-speed switch electricity
The commutation device that sub- device is constituted keeps electrical equipment to continue just to electric terminal uninterrupted power supply in separate handoff procedure
Often operating.
The threephase load of low-voltage network balances, and the loss of distribution transformer, supply line is reduced, and service life extends,
Reduce the operation cost of low-voltage network.
Description of the drawings
The functional block diagram of Fig. 1 present systems.
The catenation principle figure of Fig. 2 present systems.
Specific implementation mode
In order to clarify the technical solutions and technical objectives of the present invention, below in conjunction with the accompanying drawings and specific implementation mode is to the present invention
It is described further.
The threephase load of low-voltage network can not possibly accomplish that absolute balance, threephase load balance mentioned in this article refer to
The threephase load degree of unbalancedness of low-voltage network is less than degree of balance threshold value, wherein and national normal value may be used in degree of balance threshold value,
Such as 15%；It can also be required according to load balance, sets itself.Low-voltage network mentioned in this article refers to by from distribution transformer
The general name for the supply line for powering to electric terminal (user) that device low-pressure side output end is drawn, generally comprises basic routing line
It with branch circuit, does not distinguish in the present embodiment, is referred to as low-voltage network.Wherein, electric terminal refers to a resident, one
Power demand, an electrical equipment etc., needed for electric power conveyed by commutation device.
There are many computational methods of threephase load degree of unbalancedness, and calculation in the present embodiment is using load letter
The maximum separate difference with the separate load information of load information minimum is ceased with the maximum separate load of load information to believe
The quotient 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%.
The equal balance system of the electrical load suitable for low-voltage network of the present invention, as depicted in figs. 1 and 2, including control master
It stands, commutation device and communication channel, the multiple commutation devices for being distributed in user terminal are established and led to by communication channel and control main website
Letter connection realizes commutation device and controls the data transmission between main website, for realizing the threephase load of low-voltage network service main
Balance.
Commutation device, is three-phase input, single-phase output device, for by the power Transmission of low-voltage network to each single-phase
Electric terminal.The three-phase input end of commutation device and the triple line of low-voltage network are electrically connected, single-phase output end and electricity consumption
Terminal is electrically connected, and is powered to electric terminal, and the access that commutation device accesses low-voltage network for realizing electric terminal is separate
Handover operation, using the dynamic transfer between being supported on the triple line of low-voltage network of electric terminals, balanced three alternate phase loads.It changes
The load information of electric terminal is sent to control main website by phase device, and receives the separate handover information that control main website is sent.Institute
The load information for stating electric terminal includes separate and the electric terminal the electricity of access of electric terminal access low-voltage network
Current load can also be to access the separate and electric terminal power termination；If the load information of the electric terminal hereinafter referred to
It is not specifically noted, refers both to current loading.
Multiple electric terminals, as shown in Fig. 2, such as electric terminal 1, electric terminal 2 ... ..., electric terminal n-1, electricity consumption end
N is held, is accessed respectively by respective commutation device on A, B, C three-phase of low-voltage network, commutation device is for switching electricity consumption end
The access terminated into low-voltage network is separate, operates the three alternate dynamic transfers for being supported on the mating power grid of low pressure of electric terminal,
So that the load of electric terminal is distributed as uniformly as possible in the triple line of low-voltage network, the three-phase of low-voltage network is realized
It loads unevenness and closes symbol requirement.Load monitoring module is arranged on the power feed line of low-voltage network, as distribution transformer is low
The output end for pressing side, the total load letter for directly each phase of monitoring low-voltage network (distribution transformer low-pressure side output end)
Breath, and the total load information of each phase is sent to control main website.
What the load information and load monitoring module for each electric terminal that control main website reception commutation device is sent were sent
The total load information of each phase of low-voltage network, and updated storage in each of control main website according to the load information received
The total load information of each phase of the load information of electric terminal and the low-voltage network of load monitoring module measured；It is stored
Electric terminal load information include commutation device number, user name, current loading, power termination, access it is separate, voltage, adopt
The total load information of the fields such as sample time, each phase of the low-voltage network stored includes current loading, power termination, phase
Not, the fields such as voltage, sampling time.
The total load information of each phase for the low-voltage network that control main website is sent according to the load monitoring module stored
The threephase load degree of unbalancedness for calculating the low-voltage network is labeled as the first threephase load not herein in order to subsequently state conveniently
The degree of balance.
The load information for the electric terminal that control main website is sent according to the commutation device stored carries out calculation processing, generates
The access for needing to carry out the electric terminal of separate switching and the access low-voltage network of the electric terminal separate is cut from currently separate
The separate separate handover information of target is changed to, so that the threephase load balance of low-voltage network, and the separate handover information
It is sent to the commutation device of electric terminal corresponding thereto.The processing module of main website is controlled to the negative of the electric terminal that is received
Information carrying breath is parsed to obtain the load value of each electric terminal and access is separate, and specific calculation processes are as described below.
According to control needs, the big electric terminal of load information for such as desiring access to low-voltage network relatively evenly distributes
In the triple line of low-voltage network, avoids the electric terminal for concentrating the several loads accessed in certain phase big from simultaneously switching off, cause low
There is the imbalance of extreme suddenly in the threephase load of press-fitting power grid so that excessive offset occurs for neutral point, causes load information small
The voltage of phase line increase, power supply quality drastically declines, and " group's burning " phenomenon occurs, then can be into before calculation processing starts
The following pretreatment operation of row.
The processing module for controlling main website judges each electric terminal for accessing low-voltage network, if multiple loads are believed
Wherein a phase or two-phase that big electric terminal concentrates access low-voltage network are ceased, in A phases, then calculates and determines from the separate (A
Phase) it is switched to the separate handover information (two separate handover informations of A-B, A-C) of target separate (B and C phases) and is connected to the phase
The electric terminal for needing the above-mentioned load information of separate switching big not in (A phases), so that the electricity consumption end that above-mentioned load information is big
End is distributed as homogeneously as possible in the triple line (A, B, C phase) of low-voltage network, makes have load information big in each phase line
Electric terminal.After the big electric terminal of multiple load informations and low-voltage network simultaneously switch off, low-voltage network is loaded
The harmful effect for balancing generation is small, and making low-voltage network threephase load still has the preferable degree of balance, is unlikely to generate more serious
Laod unbalance.The big electric terminal of the load information refers to one or several electric terminals for being connected to low-voltage network
If simultaneously switch off, the load balanced state of low-voltage network can be destroyed, the three-phase for keeping the generation of low-voltage network more serious is negative
It carries uneven.If above-mentioned pretreatment operation need not be carried out, following calculation processing can be directly carried out, adjusts low-voltage network
Threephase load, so that threephase load is balanced.
First, phase load calculates, and the processing module for controlling main website is matched according to the load information calculating access low pressure stored
The total load information of each phase of power grid is (such as the total load information of the A phases of low-voltage network, the total load information of B phases, C phases
Total load information), phase average total load information (the i.e. arithmetic average of the sum of total load of three-phase of A phase, B phase, C phase of each phase
Value) and access low-voltage network threephase load degree of unbalancedness, calculation formula is, threephase load degree of unbalancedness=(load letter
Cease the separate of maximum separate-load information minimum)/load information maximum separate * 100%.The access low-voltage network
Threephase load degree of unbalancedness herein be labeled as the second threephase load degree of unbalancedness.
Secondly, it determines separate handover information, controls the processing module of main website according to the second threephase load degree of unbalancedness, setting
Balanced threshold judge whether balanced to the threephase load of the low-voltage network, if the threephase load of access low-voltage network
Degree of unbalancedness is more than balanced threshold, then calculates and determine from big separate of total load information and be switched to the small target phase of total load information
It needs to adjust between small separate of the big separate and total load information of other separate handover information and the total load information
The adjustment magnitude of load information.To reduce the complexity of data processing, as it is a kind of preferably, the separate handover information refer to by
Total load information is more than the separate mesh for being switched to total load information and being less than phase average total load information of phase average total load information
Mark separate, adjustment magnitude is that small separate of the total load information of phase average total load information and the separate handover information total is born
It is big to be denoted as total load information that the first difference or adjustment magnitude are the separate handover information herein for the difference of information carrying breath
The difference of separate total load information and phase average total load information, is denoted as the second difference herein or adjustment magnitude takes described
Minimum value in one difference and every two difference so that need to carry out the quantity of the commutation device of the electric terminal of separate switching compared with
It is few.When the big separate total load information and phase average total load information of the total load information of the separate handover information difference
When more than the first difference, adjustment magnitude chooses the first difference；Otherwise the second difference is chosen as adjustment magnitude.It in this way can be to avoid
It is uneven so as to cause new threephase load the excessive of the adjustment of load of the electric terminal on big separate of load information, it makes
The commutation device quantity being electrically connected with electric terminal at the separate switching of needs is excessive.
Again, it determines the electric terminal for access separate switching, believes in the total load of the separate handover information
Selection in the electric terminal on greatly separate is ceased to need to carry out the electric terminal of separate switching, the load of selected electric terminal
The sum of information is suitable with the adjustment magnitude, so that the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold.It is above-mentioned
" the sum of load information of electric terminal is suitable with the adjustment magnitude " refer to, when the access of selected electric terminal is separate
It carries out after accessing separate switching, the load of electric terminal is relatively evenly distributed in the triple line of low-voltage network, so that electricity consumption is whole
The load at end is distributed as uniformly as possible in the triple line of low-voltage network, keeps the threephase load of access low-voltage network uneven
Weighing apparatus degree is less than balanced threshold, that is, realizes the threephase load balance in low-voltage network.
In order to reduce the quantity for the electric terminal for carrying out separate switching, separate switching is reduced to the possible of low-voltage network
Harmful effect can also use following methods to determine the electric terminal for needing to carry out separate switching：
Electric terminal sorts, and the processing module for controlling main website believes the separate switching according to the load information of electric terminal
Electric terminal on big separate of the total load information of breath is ranked up, and using descending (can also ascending order) sequence, is always born
Information carrying ceases the electric terminal ordered list on greatly separate；The load for the electric terminal that electric terminal ordered list is recorded from the top down
Information is sequentially reduced.
Electric terminal is selected, and control the processing module of main website has from the electric terminal on big separate of the total load information
In sequence table, sequentially select one or more electric terminals from the top down, make the sum of load information of selected electric terminal with
The adjustment magnitude is suitable, so that the threephase load degree of unbalancedness of access low-voltage network is less than balanced threshold.Institute is operated in this way
The quantity of the electric terminal of selection is smaller, it is possible to reduce the quantity of the commutation device of separate switching, reduction is needed to be cut due to separate
Change disturbing influence of the operation to low-voltage network.The processing module of main website is controlled including the separate separate handover information of target
It is sent to the commutation device of corresponding electric terminal.
Commutation device according to the separate handover information received by electric terminal access low-voltage network access it is separate by
The current separate target being switched to corresponding to separate handover information is separate, so that the load of electric terminal is distributed as homogeneously as possible
In the triple line of the service main, low-voltage network threephase load balance is realized.
The processing module for controlling main website is negative come the second three-phase for verifying low-voltage network with the first threephase load degree of unbalancedness
Unevenness is carried, if the difference of two kinds of threephase load unevenness is more than the threshold value of setting, uneven abnormal alarm is triggered, for correlation
Personnel go to handle.
Wherein, the commutation device includes acquisition module, processing module, commutation module and communication module, the acquisition mould
Block, communication module, commutation module and processing module electrical connection.Modules are specific as follows to be stated：
Acquisition module, the load information of the commutation device single-phase output end output for acquiring electric terminal connection；It adopts
It can be one kind in current transducer, voltage transformer, power transducer to integrate module, can also be a variety of.Preferably, described
Acquisition module is integrated with current transducer, voltage transformer, power transducer.
Processing module is built-in with the arithmetic element including arithmetic unit, controller, the load for being acquired acquisition module
Information is handled is sent to control main website after (analog-to-digital conversion) by communication module, execute received from control main website
Separate handover information, manipulates commutation module the electric terminal is accessed to the access of low-voltage network and separate separate be switched to by current
Target corresponding to separate handover information is separate.
Commutation module, built-in at least one commutation unit, each commutation unit are built-in with three groups of solid-state switches, any time
At most have in one commutation unit and only one group of solid-state switch is connected, connecing for low-voltage network is accessed for realizing electric terminal
Enter separate handover operation, one end of three groups of solid-state switches of commutation unit is electrically connected with three input terminals respectively, the other end and
The single-phase output end of the commutation unit is electrically connected, for powering to electric terminal.The solid-state switch by thyristor, IGBT or
The fully opened types solid switch device such as IGCT is constituted, and the switching speed of solid-state switch is fast (switch time Millisecond even Microsecond grade),
Ensure in separate handoff procedure to electric terminal continued power.
Communication module for commutation device and controls the data transmission between main website, for receiving the transmission of control main website
Separate handover information sends the load information of the electric terminal to control main website.
Wherein, the control main website includes memory module, processing module, communication module, the memory module, communication module
It is electrically connected with processing module.Modules are specific as follows to be stated：
Memory module is made of storage medium, such as hard disk, FLASH chip, for store control main website received it is each
The each phase for the low-voltage network that the load information and load monitoring module for the electric terminal that a commutation device is sent are sent it is total
Load information.
Processing module is built-in with processor, for carrying out calculation process to data；Processing module is each according to what is stored
The load information of electric terminal be calculated the total load information of each phase of the low-voltage network, phase average total load information and
Threephase load degree of unbalancedness；If the threephase load of the low-voltage network is uneven, according to load balancing strategy be calculated from
The separate separate handover information of the small target of the big separate switching total load information of total load information and it is described two it is separate between need
The adjustment magnitude for the load information to be adjusted, so that the threephase load balance of low-voltage network；According to the total of separate handover information
The load information of each electric terminal on big separate of load information, is computed selection and needs the electricity consumption for carrying out separate switching whole
End, the sum of load information of selected electric terminal is suitable with the adjustment magnitude, so that the threephase load of low-voltage network
It balances, and separate handover information is sent to by communication module the commutation device of corresponding electric terminal.
Communication module, for controlling the communication between main website and commutation device, the electricity consumption for receiving commutation device transmission
The load information of terminal sends separate handover information to commutation device.
The equal balance system of electrical load of the low-voltage network of the present invention, you can the three-phase for realizing low-voltage network is negative
Balance is carried, the threephase load balance for realizing certain branch line of low-voltage network is can be used for, to reduce in the branch line
Property line current loading, reduce line loss.When control main website and low-voltage distribution it is online commutation device electrical connection, and control commutation dress
Set access low-voltage network access it is separate when, distributed as homogeneously as possible in the low-voltage network using the load of electric terminals
In triple line, the threephase load balance of the low-voltage network is realized.When on certain branch line of control main website and low-voltage network
Commutation device be electrically connected, and only control the commutation device on the branch line access low-voltage network access it is separate when, use electricity
The load of terminal is distributed as homogeneously as possible in the triple line of the branch line, flat for realizing the threephase load of the branch line
Weighing apparatus；When the threephase load balance of each branch line of low-voltage network, then the threephase load balance of low-voltage network, passes through in this way
The equilibrium strategy of branch line can be such that the threephase load degree of unbalancedness of low-voltage network controls and be much smaller than national standard at one
15% level, and each branch line also reaches threephase load balance and requires.
In order to make those skilled in the art be better understood when technical scheme of the present invention, below with an example to above-mentioned
Inventive method is described further, the load information in this example be separate and the phase current loading (can also be it is separate and should
The power termination of phase).For convenience, for choosing 10 electric terminals in this example, each electric terminal is respectively by changing
Phase device accesses low-voltage network, and the electric terminal number of each electric terminal accesses separate, current loading and low-voltage network
The total load information of each phase 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 is shown, after electric terminal access, the total load of each phase of A, B, C three-phase of low-voltage network is respectively 39,
65, the total load of 16 unit values, electric terminal access is 120 (39+65+16) a unit values, and the total load of wherein B phases is C
4 times of phase, threephase load balance-unbalance are 75.5%.Due to the big electric terminal collection of multiple load informations (30,17,18,17)
The B phases of middle access low-voltage network, the big electric terminal of non-loaded information in C phases.Main website is controlled before carrying out calculation processing, first
It is pre-processed, the electric terminal for keeping load current big distributes the three-phase in low-voltage network as homogeneously as possible.Control main website
Data processing module loaded according to the total current of the current loading of electric terminal and each phase, obtain load current through calculation process
The separate needs of access of big electric terminal 9 are switched to by current B phases accesses separate C phases as target, is formed and is used for phase
The separate handover information not switched is denoted as 9 (B, C), indicates that the separate needs of the access of electric terminal 9 are switched to target from B phases
Separate handover information in separate C phases；Control main website handle includes that the separate handover information of target access separate (C phases) is sent to
The commutation device of corresponding electric terminal 9, the commutation device of electric terminal 9 is according to the separate switching signal of reception electric terminal
9 access is separate to be switched to C phases by current B phases；After handling in this way, the big electric terminal of load information divides as homogeneously as possible
A, B, C three-phase of low-voltage network are fitted over, 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 C phases are switched to by B phases after, each phase of A, B, C three-phase of low-voltage network it is total negative
It is respectively 39,35,46 unit values to carry, it is clear that the total load of C phases is much larger than the total load of B phases, and the three-phase of low-voltage network is negative
It is 23.9% to carry uneven.Control main website is computed processing, determines from C phases and is switched to the separate handover information of B phases, is denoted as (C, B),
The fractional load of C phases is transferred on B, and from the opposite B phases of C needs the adjustment magnitude 6 of the current loading adjusted (C phases is total
Current loading 46- phase averages current loading 40) a unit value.Electric terminal in the C phases big to total load information is negative according to it
Information carrying breath carries out descending sort and operates to obtain the electric terminal ordered list of C phases, from upper from the electric terminal ordered list of the C phases
Electric terminal is sequentially selected downwards, keeps the sum of load information of selected electric terminal suitable with the adjustment magnitude, i.e.,
After the separate adjustment of access of selected electric terminal, the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold.Then
Electric terminal 3 most matches, and is labeled as 3 (C, B), indicates that electric terminal 3 is switched to target access phase from separate (C phases) is currently accessed
The not separate handover information of (B phases), control main website is including that target accesses the separate switching signal of separate (B phases) and is sent to pair
The commutation device for the electric terminal 3 answered, the commutation device of electric terminal 3 is according to the separate switching signal received electric terminal
Access low-voltage network is separate to be switched to B phases by current C phases, and the threephase load degree of unbalancedness of low-voltage network is 5.9%, is reached
It is required to balance, 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
Technical scheme of the present invention is when implementing, the three-phase input end of commutation device and the three-phase power line of low-voltage network
Electrical connection, single-phase output end and electric terminal electrical connection, for powering to electric terminal, i.e., electric terminal passes through at any time
Commutation device only accesses the phase in the triple line of low-voltage network.Commutation device is established by communication channel and control main website
Communication connection, for realizing the data transmission between commutation device and control main website.(or external) built in commutation device is used to adopt
The load information of the acquisition module acquisition electric terminal of the load informations such as colleeting comb, voltage, power, and the load acquired is believed
Breath is sent to control main website, and the data processing module for controlling main website calculates determining total load information according to the load information received
It is big it is separate on need carry out the electric terminal of separate switching and the electric terminal separate to be switched to total load letter from current
The separate separate handover information of small target is ceased, and the separate handover information is sent to the commutation dress of corresponding electric terminal
It sets, commutation device is switched over according to the separate handover information received is separate to the access of electric terminal access low-voltage network
Operation, redistribute electric terminal low-voltage network phase load so that access low-voltage network electric terminal load
It distributes as homogeneously as possible in the triple line of low-voltage network, keeps the threephase load of access low-voltage network balanced, realize low
It is press-fitted the threephase load balance of power grid, line loss is effectively reduced, improves power supply quality.
Compared to the prior art, the present invention has following technological progress.
1) it realizes that threephase load is balanced, improves the power supply quality of low-voltage network, low-voltage network is accessed by acquisition
The load information of each electric terminal, be computed according to the load information determining total load information it is big it is separate it is upper need it is separate
The access of the target of the electric terminal of switching and the electric terminal is separate, by commutation device that the access of the electric terminal is separate
Be switched to that target access is separate, electric terminal be supported on low-voltage network three it is alternate be adjusted, make access low pressure
The load of the electric terminal of power distribution network is uniformly distributed in the triple line of low-voltage network as far as possible, realizes low-voltage network
Threephase load balance, improve the power supply quality of low-voltage network.
2) the three alternate adjust automaticallies for being supported on low-voltage network of electric terminal by commutation device and control master station,
Make the three alternate adjust automaticallies for being supported on low-voltage network of electric terminals, is participated in without artificial, keep the three-phase of low-voltage network
Load balance.
3) uninterrupted continuous power supply in separate handoff procedure is accessed, by using the fully opened types high-speed switch such as IGBT, IGCT
The commutation device that electronic device is constituted keeps electrical equipment to continue to electric terminal uninterrupted power supply in separate handoff procedure
It runs well.
4) the threephase load balance of low-voltage network, the loss of distribution transformer, supply line are reduced, and service life is prolonged
It is long, reduce the operation cost of low-voltage network.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, the present invention
Claimed range is delineated by the appended claims, the specification and equivalents thereof from the appended claims.
Claims (5)
1. a kind of equal balance system of electrical load suitable for low-voltage network, it is characterised in that：
Include the commutation device for transmitting electric power to electric terminal and the control for controlling low-voltage network threephase load balance
Main website processed is communicatively coupled by communication channel between commutation device and control main website, is led for realizing commutation device and control
Data transmission between standing；
Commutation device, three-phase input end is used for and the triple line of low-voltage network is electrically connected, single-phase output end be used for and
Electric terminal is electrically connected, and commutation device accesses the separate handover operation that accesses of low-voltage network for realizing electric terminal, and
The load information of electric terminal is sent to control main website, and receives the separate handover information that control main website is sent；
It controls main website and calculation processing is carried out according to the load information of the electric terminal received, specifically include：Phase load calculates, root
According to the electric terminal load information calculate low-voltage network each phase phase total load information and low-voltage network three
Phase load degree of unbalancedness；Separate handover information calculates if the threephase load degree of unbalancedness of low-voltage network is more than balanced threshold
It determines from big separate of total load information and is switched to the separate separate handover information of the small target of total load information and described total
The adjustment magnitude of the load information adjusted is needed between small separate of the big separate and total load information of load information, this is separate to cut
The separate total load information that is switched to that information refers to by total load information more than phase average total load information is changed always to bear less than phase average
The target of information carrying breath is separate, and adjustment magnitude is that phase average total load information and the total load information of the separate handover information are small
The separate total load information and phase of the difference of separate total load information and the total load information of the separate handover information greatly
Minimum value in the difference of average total load information；Electric terminal determines, the electricity consumption on big separate of the total load information
Selection needs to carry out the electric terminal of separate switching, the sum of load information of selected electric terminal and the adjustment in terminal
Magnitude is suitable, so that the threephase load degree of unbalancedness of low-voltage network is less than balanced threshold, and the separate handover information is sent out
It is sent to the commutation device of electric terminal corresponding thereto；
The access that electric terminal is accessed low-voltage network according to the separate handover information received by commutation device is separate by current
The separate target for being switched to the separate handover information is separate.
2. the equal balance system of a kind of electrical load suitable for low-voltage network according to claim 1, which is characterized in that institute
Stating commutation device includes：
Acquisition module, the load information of the commutation device single-phase output end output of acquisition electric terminal connection；
Processing module is executed for being sent to control main website by communication module after being handled the load information acquired
The separate handover information from control main website received manipulates commutation module and the electric terminal is accessed connecing for low-voltage network
Enter separate separate by the current separate target being switched to corresponding to separate handover information；
Commutation module, built-in three groups of solid-state switches, any time at most has and the conducting of only one group of solid-state switch, for realizing with
Electric terminals access the separate handover operation of access of low-voltage network, one end of three groups of solid-state switches respectively with three input terminal electricity
Connection, the other end and the electrical connection of single-phase output end；
Communication module for commutation device and controls the data transmission between main website, for receiving the separate of control main website transmission
Handover information sends the load information of the electric terminal to control main website.
3. the equal balance system of a kind of electrical load suitable for low-voltage network according to claim 1, which is characterized in that institute
Stating control main website includes：
Memory module, the load information for storing the electric terminal that each commutation device received is sent；
The total of each phase of the low-voltage network is calculated according to the load information of each electric terminal of storage for processing module
Load information and threephase load degree of unbalancedness；If the threephase load of the low-voltage network is uneven, according to load balancing strategy
It is calculated from big separate of total load information and is switched to the separate separate handover information of the small target of total load information and two-phase
The adjustment magnitude of the load information adjusted is needed between not, so that the threephase load balance of low-voltage network；According to separate switching
The load information of each electric terminal on big separate of the total load information of information, is computed selection and needs to carry out separate switching
Electric terminal, the sum of load information of the electric terminal is suitable with the adjustment magnitude, so that the three-phase of low-voltage network
Load balance, and separate handover information is sent to by communication module the commutation device of corresponding electric terminal；
Communication module, for controlling the data transmission between main website and commutation device, the electricity consumption for receiving commutation device transmission
The load information of terminal sends separate handover information to commutation device.
4. the equal balance system of a kind of electrical load suitable for low-voltage network according to claim 1, it is characterised in that：Also
Including load monitoring module, the threephase load for monitoring low-voltage network, load monitoring module is the low-voltage distribution acquired
The threephase load information of net is sent to control main website, controls the processing module of main website according to the three-phase of the low-voltage network received
Load information calculate low-voltage network threephase load unevenness, for verify by the electric terminal load information calculate obtain
The low-voltage network threephase load unevenness obtained triggers if the difference of two kinds of threephase load unevenness is more than the threshold value of setting
Laod unbalance abnormal alarm.
5. a kind of electrical load equilibrium system suitable for low-voltage network according to claim 1-4 any claims
System, it is characterised in that：The load information includes one or both of electric current and power and separate mark.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229739.4A CN104852394B (en) | 2015-05-07 | 2015-05-07 | A kind of equal balance system of electrical load suitable for low-voltage network |
| CN201711303158.6A CN107919672B (en) | 2015-05-07 | 2015-05-07 | Power load balancing system suitable for power distribution network |
| CN201711303177.9A CN107979107B (en) | 2015-05-07 | 2015-05-07 | Power load balancing system for low-voltage power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229739.4A CN104852394B (en) | 2015-05-07 | 2015-05-07 | A kind of equal balance system of electrical load suitable for low-voltage network |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711303177.9A Division CN107979107B (en) | 2015-05-07 | 2015-05-07 | Power load balancing system for low-voltage power distribution network |
| CN201711303158.6A Division CN107919672B (en) | 2015-05-07 | 2015-05-07 | Power load balancing system suitable for power distribution network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104852394A CN104852394A (en) | 2015-08-19 |
| CN104852394B true CN104852394B (en) | 2018-10-02 |
Family
ID=53851833
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711303177.9A Active CN107979107B (en) | 2015-05-07 | 2015-05-07 | Power load balancing system for low-voltage power distribution network |
| CN201510229739.4A Active CN104852394B (en) | 2015-05-07 | 2015-05-07 | A kind of equal balance system of electrical load suitable for low-voltage network |
| CN201711303158.6A Active CN107919672B (en) | 2015-05-07 | 2015-05-07 | Power load balancing system suitable for power distribution network |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711303177.9A Active CN107979107B (en) | 2015-05-07 | 2015-05-07 | Power load balancing system for low-voltage power distribution network |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711303158.6A Active CN107919672B (en) | 2015-05-07 | 2015-05-07 | Power load balancing system suitable for power distribution network |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN107979107B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11804714B2 (en) | 2021-09-28 | 2023-10-31 | Saudi Arabian Oil Company | Intelligent system for controlling and monitoring the balance condition, harmonic, and leakage current in industrial and residential areas |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226684A (en) * | 2015-09-29 | 2016-01-06 | 国电南瑞科技股份有限公司 | A kind of low voltage electric network three-phase imbalance control method based on phase-change switch |
| CN105356488A (en) * | 2015-12-03 | 2016-02-24 | 云南瑞攀科技有限公司 | Power-uninterruptible three-phase load self-balancing device and three-phase load self-balancing power supply system |
| CN105552937B (en) * | 2015-12-25 | 2019-04-12 | 国家电网公司 | The separate recognition methods in three-phase four-wire system network load end based on PLC technology |
| CN105610134B (en) * | 2016-02-29 | 2018-08-07 | 国网新疆电力公司昌吉供电公司 | Two line user's phasing switch device of low pressure |
| CN105846435A (en) * | 2016-04-12 | 2016-08-10 | 林新欣 | Electric power grid line controlling apparatus |
| CN105846436A (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 |
| CN106026083B (en) * | 2016-06-27 | 2019-02-19 | 吉林大学 | A kind of Power Network Transient Stability analysis method based on MATLAB |
| CN106099959A (en) * | 2016-08-16 | 2016-11-09 | 南京新联能源技术有限责任公司 | A kind of three-phase imbalance based on cloud platform regulation system |
| CN106130045A (en) * | 2016-08-24 | 2016-11-16 | 国网天津宝坻供电有限公司 | A kind of method of regulating platform district three-phase load unbalance |
| CN106374512A (en) * | 2016-10-19 | 2017-02-01 | 北京合锐赛尔电力科技股份有限公司 | Three-phase current unbalance automatic control system and control method |
| CN107221941B (en) * | 2016-11-18 | 2019-12-31 | 都书言 | Low-voltage power grid energy distributor and control method thereof |
| CN106656585A (en) * | 2016-12-08 | 2017-05-10 | 国网北京市电力公司 | Power system and information processing method of same |
| CN107591826B (en) * | 2017-08-08 | 2019-11-12 | 山东胜利通海集团东营天蓝节能科技有限公司 | A kind of distribution host, the equal balance system of branch line threephase load |
| 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 |
| CN107359631B (en) * | 2017-08-08 | 2019-11-19 | 北京德昌祥科技有限公司 | A kind of distribution host, branch line threephase load balance method and its device |
| CN112398148A (en) * | 2017-08-08 | 2021-02-23 | 陈鸽 | Power load balancing method for power distribution network |
| CN108267624A (en) * | 2018-02-23 | 2018-07-10 | 南京飞腾电子科技有限公司 | Electronic electric energy meter |
| CN108471128B (en) * | 2018-05-05 | 2021-04-23 | 石家庄科林电气股份有限公司 | Three-phase load unbalance automatic adjustment method realized by using balance optimization algorithm |
| CN111130129B (en) * | 2018-06-07 | 2021-03-02 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase-changing system for medium and low voltage line |
| CN109713693B (en) * | 2019-01-23 | 2023-03-31 | 西安理工大学 | Three-phase unbalanced load switching method based on commutation switch networking |
| WO2020186411A1 (en) * | 2019-03-16 | 2020-09-24 | 深圳德微电技术有限公司 | Electric power load balancing system for use in low-voltage power distribution network |
| CN110716091A (en) * | 2019-11-27 | 2020-01-21 | 国网冀北电力有限公司电力科学研究院 | Three-phase unbalance on-line monitoring method based on four-stage balance phase modulation algorithm |
| CN114123255A (en) * | 2021-11-29 | 2022-03-01 | 珠海格力电器股份有限公司 | Light storage power utilization system and load three-phase power control method, device and equipment thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611126A (en) * | 2012-03-13 | 2012-07-25 | 中国计量学院 | Switching method for flexible switching system based on single-phase inverter power source |
| CN103545826A (en) * | 2012-07-09 | 2014-01-29 | 江西龙跃电子科技有限公司 | Intelligent low-voltage power load distribution system and method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5349377B2 (en) * | 2010-03-15 | 2013-11-20 | 中国電力株式会社 | Power supply system control method and power supply system |
| CN102394501B (en) * | 2011-03-18 | 2014-04-02 | 北京潞能麒麟电力设备有限公司 | Energy-saving method and device based on power grid load dynamic balance |
| CN102751733B (en) * | 2012-06-26 | 2014-07-23 | 中国电力科学研究院 | On-line three-phase load unbalance processing method suitable for low-voltage distribution network |
| CN103259276B (en) * | 2013-06-04 | 2016-03-30 | 长沙高升电子电器科技有限公司 | Automated intelligent distribution system and distribution method |
| CN104091231A (en) * | 2014-06-30 | 2014-10-08 | 国家电网公司 | Distribution network fault repairing commanding and processing system and method |
| 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 |
| CN104218596A (en) * | 2014-09-25 | 2014-12-17 | 国家电网公司 | Energy-saving device based on low-voltage line load balance |
| CN104578004B (en) * | 2015-01-29 | 2017-10-03 | 国家电网公司 | Low-voltage power supply failure with automatic load balancing function quickly isolates device |
| CN104638642B (en) * | 2015-02-11 | 2017-01-11 | 国家电网公司 | Active power distribution network analysis and evaluation system |
-
2015
- 2015-05-07 CN CN201711303177.9A patent/CN107979107B/en active Active
- 2015-05-07 CN CN201510229739.4A patent/CN104852394B/en active Active
- 2015-05-07 CN CN201711303158.6A patent/CN107919672B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611126A (en) * | 2012-03-13 | 2012-07-25 | 中国计量学院 | Switching method for flexible switching system based on single-phase inverter power source |
| CN103545826A (en) * | 2012-07-09 | 2014-01-29 | 江西龙跃电子科技有限公司 | Intelligent low-voltage power load distribution system and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11804714B2 (en) | 2021-09-28 | 2023-10-31 | Saudi Arabian Oil Company | Intelligent system for controlling and monitoring the balance condition, harmonic, and leakage current in industrial and residential areas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107979107A (en) | 2018-05-01 |
| CN107919672A (en) | 2018-04-17 |
| CN107919672B (en) | 2020-07-10 |
| CN104852394A (en) | 2015-08-19 |
| CN107979107B (en) | 2020-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104852394B (en) | A kind of equal balance system of electrical load suitable for low-voltage network | |
| CN104852396B (en) | A kind of electrical load equalization methods and its device for low-voltage network | |
| CN104852395B (en) | A kind of electrical load equalizing system for low-voltage network | |
| CN104852397B (en) | Power load balancing method and device applicable to low-voltage power distribution network | |
| CN106684895B (en) | Three-phase imbalance administering method and commutation system | |
| CN104682407B (en) | Load imbalance compensation system comprising amplitude-limiting controller and amplitude-limiting compensation method | |
| CN109713660A (en) | Direct-current grid parallel connection energy-storage battery state-of-charge balance control method and device | |
| CN108599204A (en) | A kind of power distribution station three-phase imbalance adjusted stepwise method | |
| CN111049164A (en) | Three-phase unbalance optimization method and system based on phase change switch | |
| CN115036946A (en) | Low-voltage station regional phase output power regulating system, regulating method and storage medium | |
| CN108574298A (en) | A kind of alternating current-direct current mixing micro-capacitance sensor interface converter Control method based on virtual synchronous motor technology | |
| Ragab et al. | Enhancing the response of thyristor‐controlled reactor using neural network | |
| CN110190607A (en) | Improve the idle adaptive virtual impedance control strategy for dividing equally precision of microgrid inverter | |
| CN110212556B (en) | Automatic switching device and method for three-phase unbalance and reactive power management | |
| CN107482655B (en) | A kind of optimization has a grade capacitor and inductor combination switching to adjust threephase load unbalanced method | |
| CN107359629B (en) | A kind of low-voltage network electrical load equalization methods and its device | |
| CN107359631B (en) | A kind of distribution host, branch line threephase load balance method and its device | |
| CN109756010A (en) | For the three phase dynamic balance control method of one master and multiple slaves framework AC charging system | |
| CN107591826A (en) | A kind of distribution host, branch line threephase load equalizing system | |
| CN107359632A (en) | A kind of power distribution network electrical load balance method and its device | |
| CN109995058A (en) | A kind of device and its workflow of the improvement three-phase imbalance for low voltage electric network | |
| CN106160016B (en) | Based on efficiency and current sharing energy area and maximum parallel operation system module number controlling method | |
| CN109842136A (en) | A kind of three-phase imbalance commutation system and its phase change method | |
| CN115800332B (en) | Load adjusting method and system | |
| CN116885747A (en) | Three-phase unbalanced terminal compensation device and method for power distribution network based on edge calculation |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180830 Address after: 618000 the 1 floor 2-1-2 of 2 seed company, Mount Lu Road, Deyang, Sichuan. Applicant after: Sichuan Chuang Neng Electric Power Engineering Co., Ltd. Address before: 232170 Chen Lane Village, new town, Fengtai County, Huainan, Anhui, 112 Applicant before: Chen Ge |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |