CN107359629B - A kind of low-voltage network electrical load equalization methods and its device - Google Patents
A kind of low-voltage network electrical load equalization methods and its device Download PDFInfo
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- CN107359629B CN107359629B CN201710673193.0A CN201710673193A CN107359629B CN 107359629 B CN107359629 B CN 107359629B CN 201710673193 A CN201710673193 A CN 201710673193A CN 107359629 B CN107359629 B CN 107359629B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The invention discloses a kind of low-voltage network electrical load equalization methods and its devices.Main line power load generation is unbalanced, determines the separate adjustment pair and corresponding adjustment magnitude of main line；The selection adjustment branch line in the separate adjustment each branch line big to the load of the separate general power in source, not making a check mark to the commutation device for being built-in with the power supply of magnetic moving component load device on separate to adjustment branch line source, commutation device needed for being selected in identified commutation device, if identified commutation device is not enough, then selects commutation device in not identified commutation device；Make the suitable with the adjustment magnitude of main line of the power termination of commutation device selected in each adjustment branch line, the separate target that is switched to of the access of the commutation device selected on branch line is separate, so that main line and branch line electrical load is reached equalization request.It favorably reduces and avoids the load device for being built-in with magnetic moving component of user terminal that commutation vibration occurs, generate noise, and keep steadily running.
Description
Technical field
The present invention relates to low-voltage network load-balancing techniques, and in particular to a kind of low-voltage network electrical load equilibrium side
Method and a kind of low-voltage network electrical load balancer for being adapted to carry out load-balancing method, the invention belongs to low pressure
Power distribution network distribution technique field.
Background technique
The load of low-voltage network, which is generally mixed by threephase load with single-phase load, to be formed, and residential electricity consumption is single-phase negative
It carries, distribution is more complicated, the distribution system of especially a large amount of single-phase load access low-voltage networks, and payload size is different and uses
The electric time is different, so, the unbalanced situation irregularities of the three-phase of power distribution network can not be predicted in advance, result in power distribution network three-phase
The chronicity of load is unbalanced.Application No. is 201510229756.8 Chinese patent applications to disclose one kind for low-voltage distribution
The equal balance system of the electrical load of net, as shown in Figure 1, it is specifically disclosed: controlling master station according to the phase total load of branch route
Information carries out calculation process, in the case where keeping the threephase load equilibrium of the branch route, determines the branch route needs
The commutation device of separate switching, and manipulate electrical load equalization subsystem by identified commutation device switch it is separate, make trunk
Route reaches threephase load equalization request.The technical solution of above-mentioned patent application publication does not consider its confession when selecting commutation device
The load characteristic of the load device of electricity, if load device is built-in with the motor of magnetic moving component, in separate switching, phase of powering
Mutation causes magnetic moving component that commutation vibration occurs, generates noise, and load device is unable to stable operation.Therefore, exploitation one is needed
Kind low-voltage network electrical load equalization methods and its device, to solve the above technical problems.
Summary of the invention
For shortcomings existing in the prior art and deficiency, it is an object of the present invention to provide a kind of low-voltage network electric power
Load-balancing method, for this method when selecting commutation device, preferential selection is not to being built-in with the power supply of magnetic moving component load device
Commutation device, the generation of the load device stable operation of the separate switching of commutation device to user terminal can be decreased or even eliminated
Adverse effect.
One embodiment of the present invention provides a kind of low-voltage network electrical load equalization methods, designing points in,
The following steps are included:
S1, it is based on the preset control period, obtains the phase general power load of each each phase of branch line of low-voltage network；
S2, the phase general power load based on each phase of each branch line calculate main line power load imbalance degree；
S3, when the main line power load imbalance degree is less than the first unbalanced threshold value, execute S9 step, otherwise, hold
Row S4 step；
S4, the phase general power load based on each phase of each branch line, calculate the phase general power load for determining main line
The separate separate adjustment pair and separate adjustment for needing to load the separate adjustment power termination of small target to phase general power in big source
Pair main line adjustment magnitude；It is negative to need to carry out power for selection in each big branch line of the separate phase general power load in the source
The adjustment branch line of adjustment is carried, and in the case where keeping adjustment branch line electrical load balanced, determines the adjustment branch line
Branch line adjustment magnitude；The sum of described branch line adjustment magnitude is suitable with the main line adjustment magnitude；
S5, to adjustment branch line separate adjustment it is separate to source on not to be built-in with magnetic moving component load device supply
The commutation device of electricity is identified；
S6, in the case where keeping that the adjustment branch line electrical load is unbalanced to spend less than the second unbalanced threshold value, base
It determines that the source described in the adjustment branch line is separate identified in the general power load calculating of adjustment each user terminal of branch line to change
Commutation device is selected in phase device, if the sum of separate identified power termination of commutation device in the source is less than the adjustment branch line
The branch line adjustment magnitude on road, then selection needs separate switching in the separate remaining not identified commutation device in the source again
Commutation device, keep the sum of power termination of commutation device of selection suitable with the branch line adjustment magnitude of the adjustment branch line；
The first unbalanced threshold value is less than the second unbalanced threshold value；Keep the power of selected commutation device on each adjustment branch line negative
The sum of load is suitable with main line adjustment magnitude, so that main line power load imbalance degree is less than the first unbalanced threshold value；
S7, it separate is cut from the source of separate adjustment pair by the access of the commutation device selected on the adjustment branch line is separate
The target changed to is separate；
If S8, in current control period, based on the adjustment situation of power termination on each adjustment branch line, updates and correspond to
The phase general power load for adjusting each phase of branch line, executes S2 step, if control end cycle, executes S9 step；
S9, it serves into next control period, executes S1 step.
The technical solution of present embodiment considers the load of its power supply when selection needs the commutation device of separate switching
The load characteristic of device, preferential selection is not to the commutation device for being built-in with the power supply of magnetic moving component load device, in separate switching
When, reduce and even avoid the load device generation commutation vibration, generate noise, can steadily run.
Another embodiment is modification of the embodiment above, increases commutation device access branch line to be accessed
Method, designing points are, comprising the following steps:
Step 1, the commutation device to be accessed issue the access request of access branch line；
Step 2, the first predetermined period power termination based on the commutation device to be accessed, calculate the commutation device most
The power mean value of second close preset quantity the first predetermined period power termination；
Step 3, the general power including low power load portion and high power load portion for obtaining each user terminal of branch line
Load；
Step 4 is loaded according to the general power of acquired each user terminal, is calculated and is determined that the phase general power of the branch line is negative
It carries small separate；The commutation device to be accessed is tried, and it is small separate to load into the phase general power, is based on each use
The general power at family end loads and the power mean value of commutation device to be accessed, and it is uneven to calculate the branch line electrical load after trying
Weighing apparatus degree；
Step 5, when the branch line electrical load it is unbalanced degree less than the second unbalanced threshold value when, execute step 7, it is no
Then, step 6 is executed；
Step 6, the general power based on each user terminal loads and the power mean value of commutation device to be accessed, calculates true
It is fixed to load the separate separate trial cut of the separate target for needing power termination to adjust in small source from the branch line phase general power and change pair
And the access adjustment magnitude that the separate trial cut changes pair, need separate trial cut to change in the separate upper selection in source that the separate trial cut changes pair
Commutation device, the sum of power termination of selected commutation device is suitable with the access adjustment magnitude so that trial cut change and
The unbalanced degree of branch line electrical load after trying is less than the second unbalanced threshold value；By the access phase of selected commutation device
The separate switching in the source that do not change pair from separate trial cut is mutually separate to target；
The phase general power that step 7, commutation device to be accessed access the branch line loads small separate.
The technical solution of present embodiment is to determine it according to the estimated value of the examination access power of commutation device to be accessed
Access branch line target it is separate, access branch line, do not easily lead to branch line threephase load generation it is unbalanced, in power distribution network
In load balancing control process, the quantity for needing to carry out the commutation device of separate switching is few.
It is separate to load big source in branch line phase general power for low-voltage network electrical load equilibrium treatment in the prior art
Selection needs the commutation device of separate switching, does not account for the bad shadow that the separate switching of commutation device generates load device
It rings, if load device is built-in with magnetic moving component (such as motor), in separate switching, SPA sudden phase anomalies of powering, magnetic direction mutation,
Cause load device that commutation vibration occurs, generate noise, load device is unable to stable operation.In addition, mutually negative device to be accessed
A wherein phase for random access branch line, easily causes branch line electrical load unbalanced, keeps electrical load balanced, needs separate
The quantity of the commutation device of switching is more.Compared to the prior art, technical solution of the present invention has following beneficial technical effect:
It reduces and even avoids separate switching that load device is caused to generate commutation vibration, issue noise, be conducive to load device
Stable operation.When power distribution network main line power load imbalance occurs, the adjustment branch line for needing adjustment of load is determined, to adjustment
Not making a check mark to the commutation device for being built-in with the power supply of magnetic moving component load device on the source of branch line is separate is keeping adjusting
Under branch line electrical load equilibrium situation, the commutation for needing separate switching is first selected from the separate identified commutation device in source
Device, if the power termination of all identified commutation devices is not enough, then in the separate remaining not identified commutation in source
Selection needs the commutation device of separate switching in device, and it is separate that selected commutation device is switched to target, matches low pressure
The load of power grid main line power reaches equalization request.In separate handoff procedure, reduce to the maximum extent to be built-in with magnetic fortune
The commutation device of dynamic component load device power supply, which carries out separate switching or even the commutation device, to be had to avoid separate switching
Benefit makes the load device for being built-in with magnetic moving component avoid that separate switching vibration occurs, and keeps stable operation, prolongs the service life.
Commutation device pre-selects access target when accessing branch line is separate, and the survivable branch line electrical load is equal
Weighing apparatus state needs the quantity of the commutation device of separate switching few.Commutation device to be accessed is changed when accessing branch line based on this
The load of the general power of the power-estimation value of phase device and each user terminal of the branch line try determining that it needs to access into calculating
Target it is separate, so that branch line threephase load is reached equalization request, commutation device to be accessed finally accessed into the branch line
Target it is separate.So not easily leading to branch line threephase load after commutation device access branch line to be accessed and generating unevenness
Weighing apparatus, in power distribution network load balancing control process, the quantity for needing to carry out the commutation device of separate switching is few, to the humorous of power distribution network
Wave interference and smaller to the adverse effect of the load device stable operation of user, is conducive to load device and steadily runs.
Detailed description of the invention
The schematic diagram that the low-voltage distribution host of Fig. 1 prior art, branch line are routed.
A kind of control flow chart of low-voltage network electrical load equilibrium of Fig. 2.
A kind of control flow chart of commutation device access branch line to be accessed of Fig. 3.
The schematic diagram that a kind of low-voltage distribution host of Fig. 4, branch line are routed.
The schematic diagram of branch line wiring in Fig. 5 Fig. 4.
A kind of block diagram of low-voltage network electrical load balancer of Fig. 6.
Specific embodiment
In order to clarify the technical solutions and technical objectives of the present invention, with reference to the accompanying drawing and specific embodiment is to the present invention
It is described further.
Low-voltage distribution host, branch line power wiring
The low pressure outlet side of low-tension transformer uses three-phase four-wire system, is routed to residential neighborhoods, is used for resident
Electric energy is provided.The low pressure outlet side can be regarded as power distribution network, low-voltage network, hereinafter referred to as low-voltage network.The low pressure
Power distribution network, as shown in figure 4, including the main line and m branch line drawn from low-tension transformer low-pressure side, respectively branch line
Road 1, branch line 2 ..., branch line m.The branch line 1, branch line 2 ..., branch line m respectively with main line be electrically connected,
For the electric power of main line to be respectively delivered to each electricity consumption area, to customer power supply.It should be noted that branch line described in any bar
Next stage branch line can also be connected, which can also connect again next stage branch line ... so one by one
Topology.Can be understood as " main line " shown in Fig. 4 is to draw from low-tension transformer low-pressure side, can also be powered from a certain item
Drawn on route (such as certain branch line), such " main line ", " branch line " have a more general sense, " main line " no
It is confined to the extraction of low-tension transformer low-pressure side again, it can be by any bar power supply line that branch line connects.Next for table
The case where stating conveniently, only considering to connect a plurality of " branch line " on " main line ", and do not reconnect " branch line " on " branch line ", such as
Shown in Fig. 4.
The power termination of each resident's (abbreviation user terminal) is classified as daily low power load portion and high power load
Portion.Low power load portion mainly includes that normal lighting, refrigerator, washing machine, gas heater and gas cooker etc. are low power
The electricity consumption of load device, if power is in tens watts of load devices to two or three hectowatt or so.Low power load portion directly enters low pressure
In a wherein phase for power distribution network branch line, the three-phase of low-voltage network branch line is equably accessed by number of users, it will be appreciated that be low
The quantity for being press-fitted the user accessed in each phase of power grid branch line is equal, since the power in the low power load portion at each family is big
It is small substantially the same, so the threephase load in low power load portion can substantially reach electrical load equalization request.High power is negative
Load portion includes the use of the big load device of the power consumptions such as air-conditioning, electromagnetic oven, resistance furnace, electric heating fan, micro-wave oven, electric heater
Electricity, if power is in 500 watts or more of load device.High power load portion is electrically connected to low-voltage network branch line by commutation device
Road, it will be appreciated that for the output end electrical connection of high power load portion and commutation device, three input terminals of commutation device respectively and
The triple line of low-voltage network branch line is electrically connected, and commutation device only accesses wherein the one of power distribution network branch line at any one time
Phase can only take electricity from a wherein phase for low-voltage network branch line, convey electric energy to the load device in high power load portion.Low pressure
One branch line of power distribution network, such as the m articles branch line, power, as shown in Figure 4, Figure 5, it is assumed that the m articles branch line to a plurality of clients
Road direction n user terminal power supply, n are the integer greater than 0, be individually identified as user terminal m1, user terminal m2 ... user terminal mn-1,
User terminal mn.The low power load portion of each user terminal is directly accessed on the three-phase of low-voltage network branch line, has n/3 in every phase
A user terminal access；The high power load portion of each user terminal is electrically connected by the three-phase of commutation device and low-voltage network branch line
It connects, only accesses a wherein phase for branch line at any one time.User terminal m1, user terminal m2 ... user terminal mn-1, user terminal mn
Respectively correspond the commutation device m1 being electrically connected with low-voltage network branch line m, commutation device m2 ..., commutation device mn-1, change
The load device of phase device mn (not identifying in figure), the high power load portion of user terminal are taken from branch line by commutation device
Electricity.Commutation device is mainly used for access, disconnects branch line and separate switching, and judge commutation device whether there is or not transport to being built-in with magnetic
The load device of dynamic component (such as motor) is powered, and is made a check mark.Load-monitoring device is configured on branch line, for measuring the branch
The threephase load situation of route, and control substation, it is balanced for controlling the branch line electrical load.Branch line load monitoring dress
It sets and is electrically connected with control substation.It is provided with load-monitoring device on the main line, for measuring the threephase load feelings of main line
Condition, and control main website, it is balanced for the electrical load of main control line road.The control substation of each branch line respectively and control
Master station communication connection, by the control of control main website.It should be noted that commutation device is conveyed to the load device in high power load portion
Power termination, for the ease of statement, be expressed as the power termination of commutation device herein.
Low-voltage network electrical load equalization methods
It is separate to load big source in branch line phase general power for low-voltage network electrical load Balance route in the prior art
Selection needs the commutation device of separate switching, does not account for the difference of the loadtype for the load device that commutation device is powered,
If load device is built-in with motor, electromagnetic drive mechanism equimagnetic moving component, in separate switching, SPA sudden phase anomalies of powering, magnetic field
Direction mutation causes magnetic moving component to generate commutation vibration, noise is issued, prevent load device is from stable operation.
A kind of low-voltage network electrical load equalization methods of present embodiment, as shown in Fig. 2, can well solve
Problems of the prior art are stated, the preset control period is based on, it is balanced real to low-voltage distribution host, branch line electrical load
Apply real-time control, low-voltage distribution host, branch line electrical load made to respectively reach equalization request, specifically the following steps are included:
S1 obtains each each phase of branch line of low-voltage network in current control period based on the preset control period
The load of phase general power.The phase general power load of each phase of branch line can be obtained from the control substation of branch line；In addition on branch line
Configured with load-monitoring device, the phase general power that the branch line three-phase can also be obtained by the load-monitoring device of branch line is negative
It carries；Main line is equipped with load-monitoring device, can acquire the mutually total of main line three-phase by the load-monitoring device of main line
Power termination.Phase general power load includes power termination value and corresponding separate.Power termination value can use current loading
Table is asked, and can also be indicated with power termination, if power termination value not specified (NS) herein refers both to current loading, the area Wen Zhongjiangbu
Divide power termination and current loading.
S2, the phase general power load based on each phase of each branch line, which calculates, obtains each phase of low-voltage network main line
The load of phase general power and main line power load imbalance degree.According to the mutually total of each every phase of branch line acquired in step S1
Power termination value and corresponding separate, the phase general power load of the determining each phase of low-voltage network main line of calculating and main line electricity
Power load imbalance degree.
S3 executes S9 step, otherwise, holds when the main line power load imbalance degree is less than the first unbalanced threshold value
Row S4 step；
S4, the phase general power load based on each phase of each branch line, i.e. power termination value and corresponding separate, calculating
Determine that main line phase general power loads that big source is separate to be needed to load the separate adjustment power of small target to main line phase general power
The separate adjustment pair of the separate adjustment pair and main line of load needs power termination to adjust from source is separate to target is separate
Main line adjustment magnitude, so that main line power load imbalance degree is less than the first unbalanced threshold value.For example, the A phase of main line
Phase general power load maximum, the phase general power of B phase loads minimum, needs the Partial Power load in A phase being transferred to B phase
On, the adjustment magnitude for the power termination shifted from A phase in B phase is W, referred to as main line adjustment magnitude W, so that main line
The unbalanced degree of electrical load is less than the first unbalanced threshold value.Then the separate adjustment of main line is constituted to by A phase with B phase, can be marked
For (A, B), main line adjustment magnitude is W.The first unbalanced threshold value can be lower than power distribution network equalization request with value for 10%
National standard 15%.The quantity of separate adjustment pair is one, it is also possible to there are two, as low-voltage network is wherein two separate
On multiple commutation devices simultaneously switch off branch line, cause power distribution network electrical load seriously unbalanced, at this time, it may be necessary to will be another
One it is separate on multiple commutation devices simultaneously to another two separate switchings, form two separate adjustment pair.
Selection in each big branch line of the separate phase general power load in the source needs to carry out power termination adjustment
Branch line is adjusted, and determines the branch of the adjustment branch line in the case where keeping adjustment branch line electrical load to reach equalization request
Line adjustment magnitude, the sum of each branch line adjustment magnitude for adjusting branch line is suitable with the main line adjustment magnitude, so that main
Line power load reaches equalization request.In the selection of adjustment branch line, those branch line phases are preferentially selected from branch line
General power loads the separate identical branch line in source of the maximum separate separate adjustment pair with main line.For example, the phase of main line
Not Tiao Zheng source to (A, B) it is separate be A phase, it is B phase that target is separate, the phase general power of main line A phase load it is maximum, then in each item
It selects the phase general power of A phase to load big branch line in branch line, as adjustment branch line, can make to adjust branch line quantity most
It is few.
S5, adjustment branch line described in it is separate adjustment it is separate to source on not to the load device for being built-in with magnetic moving component
The commutation device of power supply is identified.For example, to adjustment branch line A it is separate on not to be built-in with magnetic moving component load dress
The commutation device for setting power supply makes a check mark, and can be suitable for separate handover operation using 1 mark, expression.Identified commutation device
Since, without magnetic moving component, separate switching not will lead to load device generation and mutually change vibration, issues in the load device of its power supply
Noise, so that load device remains to steadily run, thus, identified commutation device is best suited for carrying out commutation operation.
S6, the general power including low power load portion and high power load portion for obtaining each user terminal of adjustment branch line are negative
It carries, is keeping the unbalanced feelings spent less than the second unbalanced threshold value (reaching equalization request) of adjustment branch line electrical load
Under condition, determined on the source of the adjustment branch line is separate based on the general power load calculating of each user terminal of adjustment branch line
Selection needs the commutation device of separate switching in identified commutation device, if the separate identified all commutation devices in the source
The sum of power termination be less than the branch line adjustment magnitude of the adjustment branch line, then remaining be not identified the source is separate again
Commutation device in selection need the commutation device of separate switching, make the sum of power termination of commutation device of selection and the adjustment
The branch line adjustment magnitude of branch line is suitable；The first unbalanced threshold value is less than the second unbalanced threshold value；Make each adjustment branch line
The sum of power termination of selected commutation device is suitable with main line adjustment magnitude on the road, so that main line power load is uneven
Weighing apparatus degree is less than the first unbalanced threshold value.Second unbalanced threshold value is used to evaluate whether branch line threephase load reaches equalization request,
Such as, can be with value for 15%, this is the national standard of power distribution network load balancing.Keep the adjustment branch line electrical load uneven
In the case that weighing apparatus degree is less than the second unbalanced threshold value, the calculating of three phase power adjustment of load is carried out to each adjustment branch line, is determined
The adjustment magnitude for needing to adjust in B phase from A phase, referred to as branch line adjustment magnitude can be to make to adjust branch line with value
Electrical load is kept in balance the maximum value of requirement, with the quantity of adjustment branch line required for reducing.If having chosen k tune altogether
Whole branch line, then branch line adjustment magnitude is respectively w1, w2 ... wk, and the sum of described w1, w2 ... wk is suitable with w, so that main
Route threephase load reaches equalization request.
K item adjust branch line, for each adjust branch line, the choosing method of commutation device is identical, next only with
The commutation device of the separate switching of selection needs from the adjustment branch line is wherein illustrated how for a certain item adjustment branch line.Such as
Branch line is adjusted to kth item, needs to be switched to B phase, branch line adjustment by A phase the access of the part commutation device of A phase is separate
Magnitude is wk.When the sum of the power termination of commutation device being identified in separate adjustment A phase separate to source is greater than or equal to the tune
When the branch line adjustment magnitude wk of whole branch line, keep the unbalanced degree of kth item adjustment branch line electrical load uneven less than second
In the case where the threshold value 15% that weighs, commutation device is selected in identified commutation device in A phase, makes selected commutation device
The sum of power termination is suitable with the kth item adjustment branch line adjustment magnitude wk of branch line, such as thinks phase less than 5% when relative error
When；When the sum of power termination of commutation device being identified in the separate A phase in source is less than the branch line adjustment amount of the adjustment branch line
When value wk, in the case where making the unbalanced degree of kth item adjustment branch line electrical load less than the second unbalanced threshold value 15%, first exist
Selection needs the commutation device of separate switching in the commutation device being identified in A phase, i.e., the commutation device being identified in A phase is complete
Portion is selected, then selects commutation device in the remaining not identified commutation device in A phase, makes selected commutation twice
The sum of power termination of device is suitable with the kth item adjustment branch line adjustment magnitude wk of branch line.In the same way, at remaining
The adjustment branch line selection of k-1 item need the commutation device of separate switching.Make to adjust selected on branch line 1- adjustment branch line k
The sum of the power termination of commutation device it is suitable with main line adjustment magnitude w so that main line power load imbalance degree is less than
First unbalanced threshold value 10%.
S7, by the separate source phase from the separate adjustment pair of the access of the commutation device selected on the adjustment branch line
Be not switched to that target is separate, the access as adjusted selected commutation device on branch line 1- adjustment branch line k it is separate respectively from
The source of separate adjustment pair is separate, and to be switched to target separate.
S8, if, based on the adjustment situation of power termination on each adjustment branch line, updating and corresponding in current control period
Adjustment each phase of branch line phase general power load, execute S2 step, carry out the control of main line power load balance optimization, if control
End cycle then executes S9 step；
S9 is based on the preset control period, serves into next control period, executes S1-S8 step, carries out a new control
The distribution host in period, branch line electrical load Balance route.
The technical solution of present embodiment needs separate switching in the separate adjustment of adjustment branch line upper selection separate to source
Commutation device when, consider the commutation device of user terminal whether there is or not to the load device power supply for being built-in with magnetic moving component, to adjustment
Not making a check mark to the commutation device for being built-in with the power supply of magnetic moving component load device on branch line source is separate, identifies and is suitable for
The mutually commutation device of operation.First selection needs to carry out separate switching from the adjustment separate identified commutation device in branch line source
Commutation device, and by the sum of the power termination of selected commutation device reach it is described adjustment branch line branch line adjustment amount
Value, if separate identified the sum of the power termination of all commutation devices cannot reach the adjustment branch to adjustment branch line in a steady stream
The branch line adjustment magnitude of route, then reselection needs in the separate remaining not identified commutation device in adjustment branch line source
The commutation device of separate switching is wanted, so that the sum of the power termination of selected commutation device reaches the adjustment branch line twice
Branch line adjustment magnitude, by selected commutation device access it is separate be switched to it is separate adjustment pair target it is separate, make low
Press-fitting power grid master, branch line electrical load reach equalization request.Identified commutation device is not to being built-in with magnetic moving component
Load device power supply, separate switching, SPA sudden phase anomalies of powering, magnetic field mutate, but load device will not generate commutation vibration, still
It can steadily run；It in this way can be to avoid in separate handoff procedure, the load device for being built-in with magnetic moving component generates commutation
Vibration, favorable loads device, which is able to maintain, steadily to be run.
The load device in the high power load portion of user terminal is not to be used always, the high power load portion of user terminal
After load device all deactivates, the output power of the phase commutation device of the user terminal is 0, can be considered that it is disconnected from power distribution network branch line
It opens.When the load device in the high power load portion of user is activated again, access power distribution network branch line is issued through commutation device
Access request, commutation device access power distribution network branch line a wherein phase, in order to make commutation device access power distribution network branch line
Not destroying the branch line electrical load equilibrium state afterwards, commutation device to be accessed can access branch line with the following method,
As shown in figure 3, specifically including following steps.
Step 1, commutation device to be accessed issues the access request of access power distribution network branch line.When user terminal is to high power
Load device when having demand, high power load device is activated, which triggers commutation device and issue access power distribution network
The access request of branch line.
Step 2, based on the first predetermined period power termination of the commutation device to be accessed, the commutation device is calculated most
The power mean value of second close preset quantity the first predetermined period power termination, the power mean value are tried as it into branch line
Try the estimated value of access power.
The first predetermined period power termination include in the first predetermined period commutation device access low-voltage network
Average value of the non-zero realtime power load aggregate-value of each sampling period of branch line relative to the non-zero power integration time, preferably
Time weighted average.The power mean value of the first predetermined period of second preset quantity power termination includes commutation device most
The average value of first predetermined period power termination of the second preset quantity closely recorded.Preferably, in present embodiment,
First predetermined period is 1；Second preset quantity be 5, can also with 10 or other it is any be greater than 2 number.Therefore, being computed can
To obtain the average value of day power termination in nearest 5 days of commutation device to be accessed, i.e. power mean value on the 5th, the power on the 5th is equal
It is worth the estimated value of the examination access power of the commutation device to be accessed as this.
Step 3, the total work including low power load portion and high power load portion of each user terminal of the branch line is obtained
Rate load.The general power load includes the power termination value in the low power load portion of the user terminal, accesses separate and Gao Gong
The power termination value of rate load portion, access are separate.The power termination can be " electric current ", " power ", " electric current, voltage " and
Any one of " electric current, voltage and phase ".
Step 4, it is loaded according to the general power of acquired each user terminal, calculates and determine the low-voltage network branch line
Phase general power loads small separate.I.e. the power termination value in the low power load portion based on each user terminal, access are separate and high
The power termination value in power termination portion, access are separate, calculate the phase general power load of low-voltage network branch line three-phase, and determine
Phase general power loads small separate.Phase general power load it is small it is separate as commutation device to be accessed try into target access
It is separate.
Commutation device to be accessed is tried, and it is small separate to load into the branch line phase general power, is based on the branch line
The general power load of each user terminal and trying into power-estimation value, such as power mean value on the 5th for commutation device to be accessed, calculate institute
State the unbalanced degree of branch line electrical load after branch line is tried.
Step 5, when it is described try into after branch line electrical load it is unbalanced degree be less than or equal to the second unbalanced threshold value
When, step 7 is executed, otherwise, executes step 6.
Step 6；The power mean value of general power load and commutation device to be accessed based on acquired each user terminal,
Such as power mean value on the 5th, calculates and determine and load that small source is separate to be adjusted to mutually total for power termination from the branch line phase general power
The separate separate trial cut of the big target of power termination change to and the separate trial cut change pair need function to target is separate from source is separate
The access adjustment magnitude of rate adjustment of load.The commutation that separate upper selection needs separate trial cut to change in the source that the separate trial cut changes pair
Device, the sum of power termination of the selected commutation device is suitable with the access adjustment magnitude, so that trial cut changes and tries
The unbalanced degree of branch line electrical load after entering is less than the second unbalanced threshold value.By the separate trial cut of the access of selected commutation device
It changes to separate, the to be accessed commutation device of target that separate trial cut the changes pair phase general power into determined by of trying and loads small phase
Not, the unbalanced degree of low-voltage network branch line electrical load after trial cut is changed, tried is calculated, so that after trial cut is changed, tried
The low-voltage network branch line electrical load it is unbalanced degree less than the second unbalanced threshold value, reach branch line electrical load
Equalization request.Finally target phase is switched to by the separate source changed pair from separate trial cut of the access of selected commutation device is separate
Not, determine that the target access of commutation device to be accessed is separate.It should be noted that working as the function that the commutation shape to be accessed is set
When rate mean value (i.e. power-estimation value) is larger, the quantity that the separate trial cut changes pair is possible to be two, i.e., phase general power loads
The separate Partial Power load in small source needs simultaneously to the separate adjustment of another two.
Step 7, the commutation device to be accessed access determined by branch line phase general power load it is small separate.Extremely
This, commutation device to be accessed is successfully accessing a wherein phase for power distribution network branch line, and survivable power distribution network branch after access
Line power load balancing state.
It waits next commutation device to be accessed to issue the access request of access power distribution network branch line, re-execute the steps
Commutation device to be accessed is accessed power distribution network branch line, and so that the branch line threephase load is reached equilibrium and want by 1- step 7
It asks.
The method of above-mentioned access branch line, each use of power-estimation value and the branch line based on commutation device to be accessed
The target that the general power load at family end try determining that its needs is accessed into calculating is separate, reaches branch line electrical load
Equalization request after commutation device to be accessed is accessed branch line, does not easily lead to branch line electrical load and generates unbalanced, matching
During network load Balance route, the quantity for needing to carry out the commutation device of separate switching is few, influences on the harmonic wave of power distribution network
And it is smaller to the adverse effect of the load device stable operation of user, be conducive to load device and steadily run.
In practical applications, default all in order to more just calculate nearest second preset quantity first of commutation device to be accessed
The power mean value of phase power termination and to not to be built-in with magnetic moving component load device power commutation device be identified,
Each branch line needs to be respectively configured three tables, respectively the first power meter, the second power meter and loadtype table.First power
Table, the second power meter and loadtype are associated by user identification field.
First power meter, the reality of the commutation device for each user terminal by record branch line of preset sampling period
When power termination；Including for distinguishing and identifying the user identification field and the first power field of user terminal, the first power field
Realtime power load value of the commutation device in each sampling period is recorded, as shown in Table 1.In present embodiment, the first power meter
Sampling period is 1 minute, and the realtime power load value of primary each commutation device was recorded every 1 minute, preferably only records non-zero value
Realtime power value.
Table one, the first power meter example/sampling period 1 divide
Second power meter, for record branch line user terminal commutation device the first predetermined period average function
Rate；Including the user identification field and the second power field, as shown in Table 2.Second power field record is based on pre- first
If the realtime power load value that the first power field of first power meter is recorded in the period (1 day) is relative to non-zero value function
The average value of the power of rate cumulative time (i.e. number), referred to as the first predetermined period (day) power termination value, such as day power termination.
First predetermined period of the second power meter is 1, i.e. the commutation of the user terminal recorded in the second power field of the second power meter
The per day power of device, this day power termination；The sampling period of first power meter is 1 minute.Thus, the first power meter is every
The big record number of the amount of each power field of a user is that 1440 (24x60) are a, as shown in Table 1.First power meter continuous sampling
Cumulative time reaches the first predetermined period, i.e., at 1 day, that is, completes 1440 sub-samplings, the first power word based on the first power meter
The realtime power load value that section is recorded calculates the mean power of each user terminal power supply period, the power termination of abbreviation day, the day
Power termination is recorded in the second power field of the corresponding user terminal of the second power meter, as shown in Table 2.
Table two, the second power meter example/the first predetermined period 1 day
The loadtype table, as shown in Table 7, including user identification field, magnetic motion fields, magnetic motion fields are used for
Whether there is or not power to the load device of built-in magnetic moving component for the commutation device at identity user end.The magnetic motion fields of loadtype table
The characteristic of value load device based on determined by commutation device be updated.Value based on loadtype table can be to branch
The commutation device of each phase is identified on route, marks the commutation device for being suitable for commutation operation.
The step 6 of above-mentioned commutation device access power distribution network branch line path method to be accessed, there are also improve further below
The main case of technology.On the source that the value of magnetic motion fields based on loadtype table changes pair the separate trial cut is separate not inwardly
The commutation device for being equipped with the power supply of magnetic moving component load device is identified, and identifies the commutation device for being suitable for commutation operation.
When the sum of separate identified power termination of commutation device in source that the separate trial cut changes pair is greater than or equal to the access
When adjustment magnitude, selection needs separate trial cut to change in the separate identified commutation device in source that separate trial cut changes pair commutation
Device, the sum of power termination of the selected commutation device is suitable with the access adjustment magnitude, so that branch line power load
Unbalanced degree is carried less than the second unbalanced threshold value；When the function for the separate identified commutation device in source that the separate trial cut changes pair
When the sum of rate load is less than the adjustment magnitude, i.e., source it is separate on without enough identified commutation devices, then first in the phase
The separate identified commutation device in source that other trial cut changes pair is all selected, then on the source that separate trial cut changes pair is separate not
Selection needs to carry out the commutation device that separate trial cut changes in identified commutation device, makes the function of selected commutation device twice
The sum of rate load is suitable with the access adjustment magnitude, so that the unbalanced degree of branch line electrical load is less than the second unbalanced threshold
Value.So that not destroying branch line electrical load equilibrium state after commutation device access power distribution network branch line to be accessed.
During commutation device to be accessed accesses power distribution network, pay the utmost attention on the source that separate trial cut changes pair is separate
The identified commutation device of selection, if identified commutation device is not enough, then remaining is not identified as the source is separate
Commutation device in select commutation device, make the sum of power termination of selected commutation device twice and access adjustment magnitude phase
When by the separate switching of selected phase device progress, so that low-voltage network electric power phase load is balanced.It in this way can be to greatest extent
Ground, which is reduced, even avoids the load device containing magnetic moving component, such as washing machine, air-conditioning, when carrying out separate switching, power supply
Commutation vibration occurs for SPA sudden phase anomalies, the mutation of magnetic moving component magnetic field, magnetic moving component, so that load device is generated commutation vibration, no
It can steadily run.
Low-voltage network electrical load balancer
Present embodiment provides a kind of balanced for realizing the low-voltage network electrical load of low-voltage network load balancing
Device, as shown in fig. 6, including following Component units:
Acquiring unit is suitable for being based on the preset control period, obtains the phase total work of each each phase of branch line of low-voltage network
Rate load；
Computing unit calculates suitable for the phase general power load based on each phase of each branch line and obtains low-voltage distribution host
The phase general power of each phase of route loads and main line power load imbalance degree；
Judging unit is suitable for when the main line power load imbalance degree is less than the first unbalanced threshold value, and execution is watched
Unit is waited, otherwise, executes adjustment branch line selecting unit
Branch line selecting unit is adjusted, suitable for the phase general power load based on each phase of each branch line, calculates and determines
The phase general power of main line loads the separate phase for needing to load the separate adjustment power termination of small target to phase general power in big source
Not Tiao Zheng pair and it is separate adjustment pair main line adjustment magnitude；Each big branch line of separate phase general power load in the source
Selection needs to carry out the adjustment branch line of power termination adjustment in road, and in the situation for keeping adjustment branch line electrical load equilibrium
Under, determine the branch line adjustment magnitude of the adjustment branch line；The sum of described branch line adjustment magnitude and the main line adjustment amount
Value is suitable；
Identify unit, suitable for adjustment branch line described in source it is separate on not to the load device for being built-in with magnetic moving component
The commutation device of power supply is identified；
Commutation device selecting unit is being kept suitable for the commutation device of the separate switching of selection needs on adjustment branch line
In the case that the unbalanced degree of adjustment branch line electrical load is less than the second unbalanced threshold value, each use based on adjustment branch line
The general power load at family end, which calculates in the determining separate identified commutation device in the source described in the adjustment branch line, selects commutation
Device, if the sum of separate identified power termination of commutation device in the source is less than the branch line adjustment amount of the adjustment branch line
Value then selects the commutation device for needing separate switching in the separate remaining not identified commutation device in the source again, makes to select
The sum of power termination of commutation device selected is suitable with the branch line adjustment magnitude of the adjustment branch line；The first unbalanced threshold
Value is less than the second unbalanced threshold value；Make the sum of power termination of selected commutation device and main line tune on each adjustment branch line
Whole magnitude is suitable, so that main line power load imbalance degree is less than the first unbalanced threshold value；
Separate switch unit, suitable for being switched to mesh for the access of commutation device selected on the adjustment branch line is separate
It marks separate；
Period control unit, if being suitable in current control period, the tune based on power termination on each adjustment branch line
Whole situation updates the phase general power load of each item adjustment each phase of branch line, executes computing unit, if control end cycle, holds
Row serves unit；
Unit is served, suitable for serving into next control period, executes acquiring unit.
Specific application example
In order to make those skilled in the art be better understood when technical solution of the present invention, an application example pair is named
Above-mentioned low-voltage network electrical load equalization methods are described further.In this example, a main line is connected with 6 branch lines
Road, as shown in figure 4, wherein the value of m is taken as 6.The power termination of each user terminal of each branch line include low power load portion and
High power load portion, low power load portion directly accesses in a wherein phase for branch line, and is evenly distributed in branch line
In triple line, as shown in Fig. 4 and table seven, high power load portion accesses a wherein phase for branch line by commutation device.In this example
The unbalanced threshold value of the second of branch line is set as 15%, and the unbalanced threshold value of the first of main line is set as 5%, main line have than
Branch line more preferably electrical load equilibrium state.Within a certain control period, the phase general power for obtaining 6 each phases of branch line is negative
It carries, the unbalanced degree of branch line electrical load, as shown in following table three.
| Branch line | A phase | B phase | C phase | Unbalanced degree | It is separate right to calculate |
| 1 | 95 | 87 | 100 | 13.0% | C, B |
| 2 | 150 | 130 | 145 | 13.1% | A, B |
| 3 | 100 | 90 | 95 | 10.0% | A, B |
| 4 | 200 | 175 | 195 | 13.1% | A, B |
| 5 | 130 | 111 | 128 | 14.6% | A, B |
| 6 | 200 | 170 | 195 | 15.0% | A, B |
| Main line | 875 | 763 | 858 | 12.8% | A, B |
Table three
Table three shows that the unbalanced degree of the electrical load of 6 branch lines of low-voltage network is respectively less than the second unbalanced threshold value
15%, reach load balancing requirement；The unbalanced degree of the electrical load of power distribution network main line is 12.8%, and it is unbalanced to be greater than first
Threshold value 5%, then main line power load do not reach equalization request.
The phase general power load of the A phase, B phase, C phase of low-voltage network main line is respectively 875,763,858, main line
The load of phase average general power is 832, is computed processing, and determination loads big source phase from the phase general power of low-voltage network main line
The separate switching pair of the separate adjustment power termination of small target, referred to as separate adjustment pair, Yi Jizhu are not loaded to phase general power
The separate adjustment pair of route it is separate to the separate adjustment magnitude for needing to adjust power termination of target, referred to as main line tune from source
Whole magnitude.Further, wherein general power loads the separate phase general power load for referring to low-voltage network main line in big source and is greater than
The phase average general power of main line loads separate, then it is A phase and C phase that source is separate；General power loads the separate assignment of small target
The phase general power load of power grid main line is less than the separate of the phase average general power load of main line, then it is B phase that target is separate.Its
In, main line adjustment magnitude is the separate adjustment pair that low-voltage network main line phase average general power loads (832) and main line
The separate B phase general power load (763) of target difference (69) and the main line separate adjustment pair the separate A phase in source
General power loads the minimum value in the difference (43) of (875) and main line phase average general power load (832).I.e. main line from
The main line adjustment magnitude that the opposite B phase of A needs to adjust is the minimum value 43 in 69 (832-763) and 43 (875-832)；Based on same
The algorithm of sample, the main line adjustment magnitude for needing to adjust from the opposite B phase of C are the minimum in 69 (832-763) and 26 (858-832)
Value 26.So the separate adjustment of low-voltage network main line is to being 43 and separate adjustment for (A, B), main line adjustment magnitude
To being 26 for (C, B), main line adjustment magnitude, main line adjustment information 1:(A, B, 43 can be respectively labeled as) and main line tune
Whole information 2:(C, B, 26).
According to main line adjustment information 1:(A, B, 43) in branch line 1-6 branch line is selected, due to the A phase function of main line
Rate load is maximum, the power termination of B phase is minimum, the preferential selection A phase power termination maximum, the smallest branch line of B phase power termination
Road, so that the negligible amounts of selected branch line can choose branch line 6 and branch line 4 in this example, keep branch line
6 and branch line 4 electrical load it is unbalanced degree less than the second unbalanced threshold value in the case where, determine branch line 6 and branch line 4 from
It is respectively 20 and 21, the adjustment magnitude of branch line 6 and branch line 4 that the opposite B phase of A, which needs the adjustment magnitude for carrying out power termination adjustment,
The sum of 20 and 21 be 41, close to main line adjustment magnitude 43.So the separate adjustment of branch line 6 is to for (A, B), branch line
Adjustment magnitude is 20, is marked as branch line adjustment information: (A, B, 20), the separate adjustment of branch line 4 is to for (A, B), branch line
Road adjustment magnitude is 21, is marked as branch line adjustment information: (A, B, 21).It is separate to the branch line 6 and branch line 4 respectively
Not being identified to the commutation device that the load device for being built-in with magnetic moving component is powered in A phase separate to source is adjusted, is based on
The value of the magnetic motion fields of loadtype table is identified operation, identifies the commutation device for being suitable for commutation.In branch line 6
Select commutation device in the commutation device being identified in A phase, if the sum of identified power termination of commutation device less than 20,
Commutation device is selected in the commutation device not being identified in the A phase of branch line 6 again, makes the selected commutation device in A phase
The sum of power termination with 6 adjustment magnitude 20 of branch line quite.It is selected in the commutation device being identified in the A phase of branch line 4
Commutation device is selected, if identified the sum of the power termination of commutation device is not marked less than 21, then in the A phase of branch line 4
Commutation device is selected in the commutation device of knowledge, makes the sum of power termination of selected commutation device and the branch line 4 in A phase
Adjustment magnitude 21 is suitable.The commutation device of the branch line 6 and branch line 4 selected access it is separate from it is separate adjustment pair
A phase is switched to B phase, and after the threephase load adjustment of branch line 6 and branch line 4, main line power load imbalance degree is 6.3%,
Greater than the first unbalanced threshold value, still without reaching equalization request.It is as shown in Table 4:
| Branch line | A phase | B phase | C phase | Unbalanced degree | It is separate right to calculate |
| 1 | 95 | 87 | 100 | 13.0% | C, B |
| 2 | 150 | 130 | 145 | 13.1% | A, B |
| 3 | 100 | 90 | 95 | 10.0% | A, B |
| 4 | 179 | 196 | 195 | 8.7% | C, A |
| 5 | 130 | 111 | 128 | 14.6% | A, B |
| 6 | 180 | 190 | 195 | 7.7% | C, A |
| Main line | 834 | 804 | 858 | 6.3% | C, B |
Table four
According to main line adjustment information 2:(C, B, 26) in non-selected branch line 1,2,3,5 branch line is selected, it is excellent
The biggish branch line of difference of choosing selection C phase load and B phase load, has branch line 5,2,1 selective, selects the branch of one of them
Route 2, the adjustment magnitude that branch line 2 is adjusted from the opposite B phase of C are 26；So the separate adjustment of branch line 2 to for (C, B), branch
Line adjustment magnitude is 26, is marked as branch line adjustment information: (A, B, 26).Magnetic motion fields based on loadtype table
Value, not powering to the load device for being built-in with magnetic moving component in C phase separate to source to the separate adjustment of the branch line 2
Commutation device is identified.Commutation device is selected in the commutation device being identified in C phase, if the function of identified commutation device
The sum of rate load then selects commutation device in commutation device not identified in C phase again, fills selected commutation less than 26
The sum of power termination set is suitable with 2 adjustment magnitude 26 of branch line.Due to the smallest two commutation of power termination on branch line 2
The power termination of device is respectively 50,14, and is identified, so power termination is the smallest changes for selection in the C phase of branch line 2
Phase device, the sum of power termination of commutation device selected are 14, and 26 immediate numerical value, and 14 power termination adjustment
The threephase load equilibrium state of branch line 2 is not destroyed afterwards.The access for the commutation device that the branch line 2 is selected is separate from C phase
It is switched to B phase, after the threephase load adjustment of the branch line 2, the unbalanced degree of the electrical load of main line is 3.1%, less than the
One unbalanced threshold value, reaches equalization request, no longer adjusts other branch lines.Shown in table five specific as follows.
| Branch line | A phase | B phase | C phase | Unbalanced degree | It is separate right to calculate |
| 1 | 95 | 87 | 100 | 13.0% | C, B |
| 2 | 150 | 144 | 131 | 12.7% | A, C |
| 3 | 100 | 90 | 95 | 10.0% | A, B |
| 4 | 179 | 196 | 195 | 8.7% | B, A |
| 5 | 130 | 111 | 128 | 14.6% | A, B |
| 6 | 180 | 190 | 195 | 7.7% | C, A |
| Main line load | 834 | 818 | 844 | 3.1% | C, B |
Table five
The access of selected commutation device on route 2, branch line 4, branch line 6 is separate respectively from current separate switching
It is mutually separate to target, realize that distribution host, branch line threephase load respectively reach equalization request after adjustment, shown in table five as above.
During the threephase load of above-mentioned branch line adjustment, for each branch line, adjustment judges principle and mode
It is all the same, below will be by taking a wherein branch line 4 as an example, how the commutation device of detailed description branch line 4 adjusts.Assuming that branch line
Road 4 shares 12 user terminal access power distribution networks, and the low power load portion of each user terminal directly enters branch line 4, is evenly distributed in
In the triple line of branch line 4, a wherein phase of the high power load portion through commutation device access branch line 4.Each use of branch line 4
The low power load portion at family end, the power termination value in high power load portion and access are separate, as shown in Table 6, branch line power load
Carrying unbalanced degree is 13.1%, less than 15%, reaches equalization request.
Table six
To make main line threephase load reach equalization request, it has been determined that the separate adjustment of branch line 4 is to for (A, B), branch line
Road adjustment magnitude is 21.The loadtype table of branch line 4, as shown in Table 7.
| User identifier | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 410 | 411 | 412 |
| Magnetic movement | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 1 |
Table seven
Commutation device in the value of loadtype table based on branch line 4 A phase separate to source to the separate adjustment of branch line 4
It makes a check mark.It is identified as 1 commutation device on the A of branch line 4 is separate not to the power supply of magnetic moving component load device is built-in with, indicates
It is suitable for commutation operation；To be built-in with magnetic moving component load device power commutation device without mark, default value 0.Branch
The A phase of route 4 accesses the 41st, 44,45,48, the commutation devices of 412 user terminals, wherein the commutation device of the 45th, 412 user terminals
It is identified, ident value is updated to 1.Be identified in A phase the 45th, selection needs to carry out phase in the commutation devices of 412 user terminals
The commutation device not switched, since the adjustment magnitude of branch line 4 is 21, thus, the commutation device of the 412nd user terminal is selected, the
The commutation device power termination value of 412 user terminals is 22 suitable with the adjustment magnitude 21, and the commutation dress of the 412nd user terminal
After the separate A phase trial cut by separate adjustment pair of the access set changes to B phase, the unbalanced degree of the electrical load of branch line 4 is 9.4%,
As shown in Table 8, the electrical load equilibrium of branch line 4 still reaches equalization request.
| User terminal | Low function portion | Low function portion connects phase | A phase | B phase | C phase |
| 41 | 2 | A | 44 | ||
| 42 | 2.1 | A | 54 | ||
| 43 | 2.5 | A | 46 | ||
| 44 | 2.4 | A | 40 | ||
| 45 | 2.1 | B | 51 | ||
| 46 | 2 | B | 51 | ||
| 47 | 2.7 | B | 49 | ||
| 48 | 2.2 | B | 35 | ||
| 49 | 2.3 | C | 88 | ||
| 410 | 2.4 | C | 49 | ||
| 411 | 2.3 | C | 15 | ||
| 412 | 2 | C | 0 | 22 | |
| Phase total load | 179 | 197 | 195 |
Table eight
It should be noted that if without enough identified commutation devices in A phase, then remaining in A phase it is not identified
Commutation device in selection need to carry out the commutation device of separate switching so that the power termination of selected commutation device twice
The sum of it is suitable with the adjustment magnitude 21 of branch line 4.
In a certain control period, the commutation device request that access has been disconnected on certain branch line accesses branch line again.In order to
Description is convenient, and for choosing 12 user terminals, it is negative that the low power load portion of 12 user terminals is directly accessed branch line, high power
Load portion passes through commutation device and branch line electrical connection respectively, wherein the commutation device of the 11 of user terminal 1- user terminal 11 user terminal
A wherein phase for branch line is accessed.The separate and power termination value of 12 user terminal access branch lines, as shown in following table nine, the
The commutation device of 12 user terminals is state to be accessed.The unbalanced degree of branch line electrical load at this time is 13.3%, less than the
One unbalanced threshold value 15%, reaches electrical load equalization request.
| User terminal | Low function portion | Low function portion connects phase | A phase | B phase | C phase |
| 1 | 2 | A | 10 | ||
| 2 | 2.3 | A | 18 | ||
| 3 | 3 | A | 5 | ||
| 4 | 2.4 | A | 7 | ||
| 5 | 2.1 | B | 17 | ||
| 6 | 2 | B | 17 | ||
| 7 | 3.3 | B | 3 | ||
| 8 | 2.2 | B | 5 | ||
| 9 | 2.3 | C | 30 | ||
| 10 | 2.4 | C | 8 | ||
| 11 | 2.8 | C | 5 | ||
| 12 | 2 | C | |||
| Phase total load | 48.7 | 49.6 | 55.5 |
The access situation of 12 table nine, branch line user terminals
The work and rest habit of user day by day, so that the electricity consumption of user terminal has apparent date periodicity, it is therefore, described
First predetermined period value be 1 day, then the second power field of the second power meter recorded be each user terminal commutation dress
Set the power average value of the total accumulated time of non-zero electricity consumption in 1 day, referred to as day power termination.Second power meter of the example
As shown in following table ten, since this example uses power mean value trying into performance number as the commutation device on the 5th of commutation device
Estimate, thus, wherein only having recorded day performance number most in the past 7 days, as shown in Table 10.
The day power termination value of the commutation device of each user terminal of table ten, branch line
It is asked according to the electricity consumption of the 12nd user terminal needs, at a certain moment, needs to enable high-power load device, commutation device
Again the branch line for accessing low-voltage network, is realized by following steps and is accessed, do not destroy the balanced shape of branch line electrical load
State.
Step 1, the commutation device to be accessed of the 12nd user terminal issue the access request of access branch line.In some time
It carves, the 12nd user terminal has demand to high-power load device, enables high-power load device, manipulates the commutation dress being connected
Set the access request for issuing access low-voltage network branch line.
Step 2, the day power termination of the commutation device to be accessed of the 12nd user terminal based on the second power meter record, meter
The average value for calculating the commutation device to be accessed day power termination in nearest 5 days obtains power mean values on the 5th of the commutation device,
It is 10.1, the estimated value as examination access power.
Step 3 obtains the general power load of 12 user terminals of access power distribution network branch line.General power load includes each
The branch line identification number of user terminal, the power termination value in low power load portion, separate and high power load portion the power of access
Load value, access are separate.
Step 4 loads according to the general power of 12 acquired user terminals and calculates the phase total work for determining power distribution network branch line
Rate load it is small separate, as try into target access it is separate.General power load based on 12 acquired user terminals, such as
Shown in table nine, it is 48.7, B phase that the phase general power load for being computed acquisition branch line three-phase, which is respectively as follows: the phase general power load of A phase,
It is 49.6, C phase is 55.5.Wherein, it is small separate to be that branch line phase general power loads for A phase, and be it is the smallest separate, because
And A phase be used as try required for the commutation device of the 12nd user terminal into target access it is separate；If desired power is negative after trying
Adjustment is carried, then the minimum number of required commutation device.Nearly power mean value on the 5th of the commutation device of 12nd user terminal is 10.1,
In this, as the commutation device try into power termination estimated value.
The commutation device of 12nd user terminal to be accessed is tried separate, the base that loads small A of the phase general power into determined by
The general power of each user terminal in the table nine loads and power mean values on the 5th of the commutation device of the 12nd user terminal to be accessed
It calculates and determines the unbalanced degree of branch line electrical load, the unbalanced degree of the branch line electrical load after trying is 18.4%.
Step 5, it is described try after branch line electrical load it is unbalanced degree 18.4%, be greater than the second unbalanced threshold value
15%, 6 are thened follow the steps, otherwise, executes step 7；
Step 6,5 days of general power load and commutation device to be accessed based on 12 user terminals documented in table nine
Power mean value 10.1, the slave phase general power for being computed the determining branch line, which loads, to be needed in the separate A phase in small source by Partial Power
Adjustment of load loads that the separate separate trial cut of big target changes pair and that the separate trial cut changes pair is separate from source to phase general power
To the separate access adjustment magnitude for needing to adjust power termination of target, needed in the separate upper selection in source that separate trial cut changes pair separate
The commutation device that trial cut changes keeps the sum of power termination of selected commutation device suitable with the adjustment magnitude, so that branch line
Road electrical load reaches equalization request, and the separate trial cut of access of selected commutation device is changed to the mesh that separate trial cut changes pair
It marks separate, the described commutation device to be accessed and tries and load small separate branch line after changing trial cut, trying into phase general power
Road electrical load is balanced.Determine that the separate trial cut is changed to for (A, B) after being computed, i.e., it is A phase that source is separate, and target is separate for B
Phase, the adjustment magnitude of separate switching pair are 6.3, that is, the load capacity for needing to try adjustment from the opposite B phase of A is 6.3.In table nine the 4th,
The commutation device of 8th user terminal it is optional be A it is separate on need to carry out the commutation device that separate trial cut changes, the target phase of access
Not Wei B phase, due to by the access of the commutation device of the 8th user terminal it is separate from A it is separate on be switched in B phase, branch line have more
Good equilibrium degree, so B phase preferably is switched to from A is separate by the access of the commutation device of the 8th user terminal is separate in this example,
Determine that the target that the commutation device of the 12nd user terminal to be accessed accesses separate A phase.The commutation device of 12nd user terminal accesses A phase
On actual power load be 11, the unbalanced degree 1.6% of branch line electrical load at this time, less than the second unbalanced threshold value 15%,
Reach electrical load equalization request, does not destroy power distribution network branch line electrical load equilibrium state.
The commutation device to be accessed of 12nd user terminal is accessed identified phase general power and loads small A phase by step 7
Not.Threephase load situation after the commutation device access of 12nd user terminal, as shown in table 11.
| User terminal | Low function portion | Low function portion connects phase | A phase | B phase | C phase |
| 1 | 2 | A | 10 | ||
| 2 | 2.3 | A | 18 | ||
| 3 | 3 | A | 5 | ||
| 4 | 2.4 | A | 7 | ||
| 5 | 2.1 | B | 17 | ||
| 6 | 2 | B | 17 | ||
| 7 | 3.3 | B | 3 | ||
| 8 | 2.2 | B | 0 | 5 | |
| 9 | 2.3 | C | 30 | ||
| 10 | 2.4 | C | 8 | ||
| 11 | 2.8 | C | 5 | ||
| 12 | 2 | C | 11 | ||
| Phase total load | 48.7 | 49.6 | 55.5 |
Table 11
The loadtype table of the branch line, as shown in table 12, the commutation device for recording each user terminal has undirected
It is built-in with the load device power supply of magnetic moving component comprising user identification field and magnetic motion fields, wherein magnetic motion fields
The commutation device that value is 1 is not powered to the load device for being built-in with magnetic moving component.
| User identifier | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Magnetic movement | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 |
Table 12
" commutation device that separate upper selection needs separate trial cut to change in the source that separate trial cut changes pair " also in above-mentioned step 6
Preferred technical solution further below.The value of branch line loadtype table based on table 12, the source phase that separate trial cut changes pair
In other A phase the 1st, 4,5, the values of the magnetic motion fields of the commutation devices of 8 user terminals be respectively 0,1,1,0, show the separate A phase in source
On the 4th, the commutation devices of 5 user terminals do not power to the load device for being built-in with magnetic moving component, then in A phase separate to source
4th, the commutation device of 5 user terminals makes a check mark.The separate A phase in source be identified the 4th, select in two commutation devices of 5 user terminals
Commutation device is selected, wherein the power termination amount of the commutation device of the 4th user terminal is 7, quite with 6.3, so on selection A is separate
The commutation device of 4th user terminal, as the commutation device for needing separate trial cut to change.By the access of the commutation device of the 4th user terminal
It is separate changed in B phase by A phase trial cut, the commutation device of the 12nd user terminal is tried into A Xiang Shanghou, the electrical load of power distribution network is uneven
Weighing apparatus degree is 8.9%, is less than trimming threshold 15%, reaches equalization request.So by the commutation device of the 4th user terminal in A phase
Access it is separate B phase is switched to, by the commutation device of the 12nd user terminal access A phase by A phase, as shown in following table 13, realizing will
The commutation device of 12nd user terminal is successfully accessed branch line, and it is balanced not destroy branch line electrical load.12nd user terminal changes
The load of phase device actual power is 11, then obtains the general power load of each user terminal of branch line, calculates branch line electrical load not
Equilibrium degree is 7.1%, less than the first unbalanced threshold value 15%, reaches equalization request.
| User terminal | Low function portion | Low function portion connects phase | A phase | B phase | C phase |
| 1 | 2 | A | 10 | ||
| 2 | 2.3 | A | 18 | ||
| 3 | 3 | A | 5 | ||
| 4 | 2.4 | A | 0 | 7 | |
| 5 | 2.1 | B | 17 | ||
| 6 | 2 | B | 17 | ||
| 7 | 3.3 | B | 3 | ||
| 8 | 2.2 | B | 5 | ||
| 9 | 2.3 | C | 30 | ||
| 10 | 2.4 | C | 8 | ||
| 11 | 2.8 | C | 5 | ||
| 12 | 2 | C | 11 | ||
| Phase total load | 48.7 | 49.6 | 55.5 |
Table 13
The above-mentioned commutation device in the 12nd user terminal is tried into a wherein phase for low-voltage network, to reduce separate switching pair
The load device stable operation of user terminal has a adverse impact, and preferentially selects not in the separate A phase in source changed pair from separate trial cut
The commutation device powered to built-in magnetic moving component load device, such as selects the commutation device of the 4th user terminal, without selecting the 8th user
Commutation device, keep the access of the commutation device separate and be switched to target B phase from A phase, the commutation device of the 12nd user terminal connects
Enter A phase, so that electrical load reaches equalization request, the commutation device for completing the 12nd user terminal accesses low-voltage network.4th user
The commutation device at end is not powered to the load device of built-in magnetic moving component, and commutation vibration does not occur for separate switching, makes user terminal
Load device energy stable operation.It should be noted that the power termination amount for the commutation device being identified in the separate A phase in source
If enough, the commutation device being identified is not selected all, then selection needs are separate in the commutation device not being identified in A phase
The commutation device of switching.
The prior art is that commutation device to be accessed is first randomly accessed to a wherein phase for power distribution network branch line, then again
Branch line electrical load equilibrium treatment is carried out, phase general power is loaded into the Partial Power adjustment of load on greatly separate to phase total work
Rate load small target it is separate on so that branch line electrical load is balanced.Therefore, usually will appear when commutation device to be accessed
After accessing branch line, the phase general power as accessed branch line is loaded on greatly separate, causes branch line electrical load uneven immediately
Weighing apparatus needs the quantity of the commutation device of separate switching more, on the one hand matches to low pressure to keep the electrical load of power distribution network branch line balanced
Power grid causes harmonic wave interference, on the other hand also influences the steadily operation of the load device of user terminal, is such as built-in with the sky of motor
The load devices such as tune machine, washing machine generate commutation vibration, and making air conditioner, washing machine etc., stabilizability is not run, or even causes to damage
It is bad.
In another control period, the high-power load device in part of the 2nd user terminal of above-mentioned branch line deactivates suddenly, the
The high power load value of 2 user terminals drops to 6 from 18.The low power load portions of current 12 user terminals and high power load portion
Load state and access are separate as shown in following table 14, and the unbalanced degree of branch line electrical load at this time is 21.4%, are greater than not
Trimming threshold 15%, does not meet equalization request.
| User terminal | Low function portion | Low function portion connects phase | A phase | B phase | C phase |
| 1 | 2 | A | 10 | ||
| 2 | 2.3 | A | 6 | ||
| 3 | 3 | A | 5 | ||
| 4 | 2.4 | A | 7 | ||
| 5 | 2.1 | B | 17 | ||
| 6 | 2 | B | 17 | ||
| 7 | 3.3 | B | 3 | ||
| 8 | 2.2 | B | 5 | ||
| 9 | 2.3 | C | 30 | ||
| 10 | 2.4 | C | 8 | ||
| 11 | 2.8 | C | 5 | ||
| 12 | 2 | C | 11 | ||
| Phase total load | 52.7 | 44.6 | 55.5 |
Table 14
The unbalanced degree needs of low-voltage network branch line electrical load carry out the following processing, so that branch line electrical load is not
Equilibrium degree reaches equalization request.
SS1, the general power including low power load portion and high power load portion for 12 user terminals for obtaining branch line are negative
It carries, as shown in table 14.
SS2, the general power load based on each user terminal obtained shown in table 14, are computed the phase of A, B, C three-phase
General power load value is respectively 52.7,44.6,55.5, and the unbalanced degree of branch line electrical load is 21.4%.
SS3, the unbalanced degree 21.4% of the branch line electrical load are greater than the first unbalanced threshold value 15%, then execute SS4
Otherwise step executes SS6 step；
SS4, the general power load of 12 user terminals based on branch line shown in table 14, is computed and determines that needs are total from phase
The big source of power termination it is separate by power termination be adjusted to phase general power load the separate separate switching of small target to and should
The adjustment magnitude for needing to adjust from the separate power termination separate to target in source of separate switching pair.A, the phase total work of B, C three-phase
Rate load is respectively 52.7,44.6,55.5, and the load of the phase average general power of three-phase is 50.6, and separate switching is to for (C phase, B
Phase), the adjustment magnitude for the power termination for needing to adjust is 4.6, so that the load of A, B, C three-phase power is reached equalization request, then
It needs for 4.6 power termination in C phase to be adjusted in B phase.The value such as following table 15 of the loadtype table of the current branch line
It is shown.
| User identifier | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Magnetic movement | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 |
Table 15
The value of user identification field, magnetic motion fields based on loadtype table, in the separate C phase in source of separate switching pair
The 7th, 9, the commutation devices of 10 user terminals makes a check mark.Be identified in the separate C phase in source the 7th, 9, the commutations of 10 user terminals dress
The middle commutation device for selecting to need to carry out separate switching is set, wherein the commutation device of the 10th user terminal of selection, the 10th user terminal
Commutation device power termination and the adjustment magnitude 4.6 are suitable, and the commutation device of the 10th user changes to B phase by C phase trial cut
Afterwards, the unbalanced degree of branch line electrical load is 10.2%.It should be noted that if without enough identified in the separate C phase in source
Commutation device first all selects identified commutation device, then selects to need in the not identified commutation device of the separate C in source
The commutation device of separate switching is wanted, so that the sum of power termination of selected commutation device twice and the adjustment magnitude phase
When, make branch line electrical load it is unbalanced degree reach equalization request.
SS5, the separate separate target that is switched in source from separate switching pair of the access of selected commutation device is separate, i.e.,
B phase is switched to by current C phase by the access of the commutation device of selected 10th user is separate, branch line electrical load is uneven
Weighing apparatus degree is 10.2%, less than the first unbalanced threshold value 15%, reaches electrical load equalization request.After separate switching, if current
It controls in the period, then current separate, switching access the separate and power termination based on selected commutation device, updates institute
The general power load of each user terminal obtained, executes SS2 step, if control end cycle, executes SS6 step.Commutation device connects
After entering separate adjustment, the power termination situation of each user terminal is as shown in following table 16.
| User terminal | Low function portion | Low function portion connects phase | A phase | B phase | C phase |
| 1 | 2 | A | 10 | ||
| 2 | 2.3 | A | 6 | ||
| 3 | 3 | A | 5 | ||
| 4 | 2.4 | A | 7 | ||
| 5 | 2.1 | B | 17 | ||
| 6 | 2 | B | 17 | ||
| 7 | 3.3 | B | 3 | ||
| 8 | 2.2 | B | 5 | ||
| 9 | 2.3 | C | 30 | ||
| 10 | 2.4 | C | 8 | 0 | |
| 11 | 2.8 | C | 5 | ||
| 12 | 2 | C | 11 | ||
| Phase total load | 52.7 | 52.6 | 47.5 |
Table 16
SS6 re-executes S1 step into next control period according to the preset control period, carries out new control week
The branch line electrical load Balance route of phase.
Compared to the prior art, the present invention has the following technical progress.
It reduces and even avoids separate switching that load device is caused to generate commutation vibration, issue noise, be conducive to load device
Stable operation.When power distribution network main line power load imbalance occurs, the adjustment branch line for needing adjustment of load is determined, to adjustment
Not making a check mark to the commutation device for being built-in with the power supply of magnetic moving component load device on the source of branch line is separate is keeping adjusting
Under branch line electrical load equilibrium situation, the commutation for needing separate switching is first selected from the separate identified commutation device in source
Device, if the power termination of all identified commutation devices is not enough, then in the separate remaining not identified commutation in source
Selection needs the commutation device of separate switching in device, and it is separate that selected commutation device is switched to target, matches low pressure
The load of power grid main line power reaches equalization request.In separate handoff procedure, reduce to the maximum extent to be built-in with magnetic fortune
The commutation device of dynamic component load device power supply, which carries out separate switching or even the commutation device, to be had to avoid separate switching
Benefit makes the load device for being built-in with magnetic moving component avoid that separate switching vibration occurs, and keeps stable operation, prolongs the service life.
Commutation device pre-selects access target when accessing branch line is separate, and the survivable branch line electrical load is equal
Weighing apparatus state needs the quantity of the commutation device of separate switching few.Commutation device to be accessed is changed when accessing branch line based on this
The load of the general power of the power-estimation value of phase device and each user terminal of the branch line try determining that it needs to access into calculating
Target it is separate, so that branch line threephase load is reached equalization request, commutation device to be accessed finally accessed into the branch line
Target it is separate.So not easily leading to branch line threephase load after commutation device access branch line to be accessed and generating unevenness
Weighing apparatus, in power distribution network load balancing control process, the quantity for needing to carry out the commutation device of separate switching is few, to the humorous of power distribution network
Wave interference and smaller to the adverse effect of the load device stable operation of user, is conducive to load device and steadily runs.
The basic principles, main features and advantages of the present invention have been shown and described above.
Claims (10)
1. a kind of low-voltage network electrical load equalization methods, which is characterized in that the described method includes:
S1, it is based on the preset control period, obtains the phase general power load of each each phase of branch line of low-voltage network；
S2, the phase general power load based on each phase of each branch line calculate main line power load imbalance degree；
S3, when the main line power load imbalance degree is less than the first unbalanced threshold value, execute S9 step, otherwise, execute S4
Step；
S4, the phase general power load based on each phase of each branch line, calculate and determine that the phase general power of main line loads big
Source is separate to need to load the separate adjustment pair and separate adjustment pair of small target separate adjustment power termination to phase general power
Main line adjustment magnitude；Selection needs to carry out power termination tune in each big branch line of the separate phase general power load in the source
Whole adjustment branch line, and in the case where keeping adjustment branch line electrical load balanced, determine the branch line of the adjustment branch line
Road adjustment magnitude；The sum of described branch line adjustment magnitude is suitable with the main line adjustment magnitude；
S5, to adjustment branch line separate adjustment it is separate to source on not to be built-in with magnetic moving component load device power
Commutation device is identified；
S6, in the case where keeping the unbalanced degree of the adjustment branch line electrical load less than the second unbalanced threshold value, based on tune
The general power load of whole each user terminal of branch line calculates the separate identified commutation dress in the source described in the adjustment branch line of determination
Middle selection commutation device is set, if the sum of separate identified power termination of commutation device in the source is less than the adjustment branch line
Branch line adjustment magnitude, then selection needs changing for separate switching in the separate remaining not identified commutation device in the source again
Phase device keeps the sum of power termination of commutation device of selection suitable with the branch line adjustment magnitude of the adjustment branch line；It is described
First unbalanced threshold value is less than the second unbalanced threshold value；Make it is each adjustment branch line on selected commutation device power termination it
It is suitable with main line adjustment magnitude, so that main line power load imbalance degree is less than the first unbalanced threshold value；
S7, it separate is switched to from the source of separate adjustment pair by the access of the commutation device selected on the adjustment branch line is separate
Target it is separate；
If S8, in current control period, based on the adjustment situation of power termination on each adjustment branch line, corresponding adjustment is updated
The phase general power of each phase of branch line loads, and executes S2 step, if control end cycle, executes S9 step；
S9, it serves into next control period, executes S1 step.
2. low-voltage network electrical load equalization methods according to claim 1, it is characterised in that:
The general power load of the user terminal includes that the power in the low power load portion for being directly accessed power distribution network of the user terminal is negative
The power termination of load and the high power load portion through commutation device access power distribution network.
3. low-voltage network electrical load equalization methods according to claim 2, which is characterized in that the branch line also wraps
Include the method that commutation device to be accessed accesses the branch line, comprising:
Step 1, the commutation device to be accessed issue the access request of access branch line；
It is nearest to calculate the commutation device for step 2, the first predetermined period power termination based on the commutation device to be accessed
The power mean value of second preset quantity the first predetermined period power termination；
Step 3, the general power load including low power load portion and high power load portion for obtaining each user terminal of branch line；
Step 4 is loaded according to the general power of acquired each user terminal, is calculated and is determined that the phase general power load of the branch line is small
It is separate；The commutation device to be accessed is tried, and it is small separate to load into the phase general power, is based on each user terminal
General power load and commutation device to be accessed power mean value, calculate try after branch line electrical load it is unbalanced
Degree；
Step 5, when the branch line electrical load it is unbalanced degree less than the second unbalanced threshold value when, execute step 7 otherwise hold
Row step 6；
Step 6, based on each user terminal general power load and commutation device to be accessed power mean value, calculate determine from
The branch line phase general power loads the separate separate separate trial cut of target for needing power termination to adjust in small source and changes pair and should
The access adjustment magnitude that separate trial cut changes pair needs what separate trial cut changed to change in the separate upper selection in source that the separate trial cut changes pair
Phase device, the sum of power termination of selected commutation device is suitable with the access adjustment magnitude, so that trial cut changes and tries
The unbalanced degree of branch line electrical load after entering is less than the second unbalanced threshold value；By the access of selected commutation device it is separate from
It is separate that target is mutually arrived in the separate switching in the source that separate trial cut changes pair；
The phase general power that step 7, commutation device to be accessed access the branch line loads small separate.
4. low-voltage network electrical load equalization methods according to claim 3, which is characterized in that described described separate
The commutation device that the separate upper selection in the source that trial cut changes pair needs separate trial cut to change, specifically includes following sub-step:
Not doing to the commutation device for being built-in with the power supply of magnetic moving component load device on separate to source is changed to the separate trial cut
Mark；
When the sum of separate all identified power terminations of commutation device in the source are greater than the access adjustment magnitude,
Selection needs the commutation device of separate switching in the separate identified commutation device in source that the separate trial cut changes pair；
It, will when the sum of separate all identified power terminations of commutation device in the source are less than the access adjustment magnitude
The separate identified commutation device in source that the separate trial cut changes pair is all selected, then in the source that the separate trial cut changes pair
Selection needs the commutation device of separate switching in separate remaining not identified commutation device.
5. low-voltage network electrical load equalization methods according to claim 2, it is characterised in that:
The low power load portion includes that normal lighting, refrigerator, washing machine, gas heater and gas cooker are low power negative
Carry the electricity consumption set；
High power load portion includes the big load of air-conditioning, electromagnetic oven, resistance furnace, electric heating fan, micro-wave oven, electric heater power consumption
The electricity consumption of device.
6. low-voltage network electrical load equalization methods described in -5 any claims according to claim 1, it is characterised in that:
Each user terminal general power load include the user terminal low power load portion power termination value, access it is separate,
The power termination value in high power load portion, access are separate；
The phase general power load of each phase of branch line includes branch line identification number, phase general power load value and separate.
7. low-voltage network electrical load equalization methods according to claim 3, it is characterised in that:
The first predetermined period power termination includes the non-zero real-time of each sampling period of the commutation device in the first predetermined period
Average value of the power termination value aggregate-value relative to the non-zero power integration time；
The power mean value of the first predetermined period of second preset quantity power termination includes commutation device in recorded recently
The average value of first predetermined period power termination of two preset quantities.
8. low-voltage network electrical load equalization methods according to claim 7, it is characterised in that:
The main line includes the power supply line for being electrically connected with branch line；
The branch line includes power supply line that is being electrically connected with main line and being electrically connected with branch line or the branch line includes
The power supply line powered to each user terminal.
9. requiring the low-voltage network electrical load equalization methods according to claim 8, it is characterised in that:
The branch line is configured with loadtype table respectively, and the commutation device that loadtype table has recorded the branch line has undirected
It is built-in with the load device power supply of magnetic moving component；
Value based on loadtype table to the separate trial cut change it is separate to source, adjustment branch line separate adjustment it is separate to source on
Not to be built-in with magnetic moving component load device power commutation device identify, identify be suitable for commutation operation commutation
Device.
10. a kind of low-voltage network electrical load balancer, which is characterized in that including with lower unit:
Acquiring unit is suitable for being based on the preset control period, and the phase general power for obtaining each each phase of branch line of low-voltage network is negative
It carries；
Computing unit, the phase general power load based on each phase of each branch line calculate main line power load imbalance degree；
Judging unit is suitable for when the main line power load imbalance degree is less than the first unbalanced threshold value, and list is served in execution
Otherwise member executes adjustment branch line selecting unit；
Branch line selecting unit is adjusted, suitable for the phase general power load based on each phase of each branch line, calculates and determines main line
The phase general power on road loads the separate separate tune for needing to load the separate adjustment power termination of small target to phase general power in big source
The main line adjustment magnitude of whole right and separate adjustment pair；In each big branch line of the separate phase general power load in the source
Selection needs to carry out the adjustment branch line of power termination adjustment, and in the case where keeping adjustment branch line electrical load balanced,
Determine the branch line adjustment magnitude of the adjustment branch line；The sum of described branch line adjustment magnitude and the main line adjustment magnitude phase
When；
Identify unit, suitable for adjustment branch line separate adjustment it is separate to source on not to the load for being built-in with magnetic moving component
The commutation device of device power supply is identified；
Commutation device selecting unit is suitable in the unbalanced degree of the holding adjustment branch line electrical load less than the second unbalanced threshold
In the case where value, determine that the source described in the adjustment branch line is separate based on the general power load calculating of adjustment each user terminal of branch line
Commutation device is selected in upper identified commutation device, if the sum of separate identified power termination of commutation device in the source is small
In the branch line adjustment magnitude of the adjustment branch line, then selected in the separate remaining not identified commutation device in the source again
The commutation device for needing separate switching makes branch line tune of the sum of the power termination of commutation device of selection with the adjustment branch line
Whole magnitude is suitable；The first unbalanced threshold value is less than the second unbalanced threshold value；Make selected commutation on each adjustment branch line
The sum of power termination of device is suitable with main line adjustment magnitude, so that main line power load imbalance degree is less than the first unevenness
Weigh threshold value；
Separate switch unit, the access of the commutation device suitable for will be selected on the adjustment branch line are separate from separate adjustment pair
The separate target being switched in source it is separate；
Period control unit, if being suitable in current control period, the adjustment feelings based on power termination on each adjustment branch line
Condition updates the phase general power load of corresponding adjustment each phase of branch line, executes computing unit, if control end cycle, execution are watched
Wait unit；
Unit is served, suitable for serving into next control period, executes acquiring unit.
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