CN109995134A - A kind of power supply system and its current-equalizing system and current equalizing method independently bypassed - Google Patents
A kind of power supply system and its current-equalizing system and current equalizing method independently bypassed Download PDFInfo
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- CN109995134A CN109995134A CN201910355905.3A CN201910355905A CN109995134A CN 109995134 A CN109995134 A CN 109995134A CN 201910355905 A CN201910355905 A CN 201910355905A CN 109995134 A CN109995134 A CN 109995134A
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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Abstract
The invention discloses a kind of current-equalizing systems independently bypassed, are applied in ups system, comprising: have the sampling unit of setting in each bypass loop, each sampling unit is used to detect the size of current of the bypass loop where itself and is sent to controller；The controller being all connected with each sampling unit and each current regulation unit, for the size of current of the bypass loop being adjusted in preset range by the current regulation unit in the bypass loop when judging that any one is provided with the size of current of the bypass loop of current regulation unit beyond preset range；Current regulation unit at least one bypass loop is set.Using the solution of the present invention, the circulation that can be effectively reduced between the bypass loop in ups system.The invention also discloses a kind of current equalizing method independently bypassed and a kind of power supply systems, have relevant art effect.
Description
Technical field
The present invention relates to electrical equipment technical fields, the stream system more particularly to a kind of power supply system and its independently bypassed
System and current equalizing method.
Background technique
UPS (Uninterruptible Power Supply, uninterruptible power supply) is mainly used for single computer, calculates
The offers such as machine network system or other power electronic equipments stabilization, continual power supply, function is more and more perfect, using ground
Also more and more extensive.
Current UPS function is more perfect, can by three into three go out 33 standards, three into singly go out 31 standards, Dan Jindan
The different UPS working form such as 11 standards out concentrate it is compatible in a set of ups system, by change UPS input, output and
The mode of connection of bypass, and rectification and inversion are correspondingly driven according to wiring standard, so that it may so that a ups system is different
Mutually switch in working form, for meeting different work requirements.
For the compatible UPS of above-mentioned a variety of working forms, output needs three output terminals are short if it is single-phase
It is connected into single-phase output, therefore, if the electric current of three output terminals can not flow relatively, is easy for circulation between generation line.If
Ups system is exported using inversion, then can be flowed by controlling inverter to three output terminals, but
If exported using bypass, Fig. 1 is seen, mainly includes that filter circuit and SCR switching switch in bypass-output loop,
Due to the difference of the parameters such as the performance of filter, SCR switch, line resistance, it is likely that will cause the electric current between three bypass loops
It has differences, namely generates circulation between line.
In conclusion the circulation between the bypass loop how being effectively reduced in ups system, is current art technology
Personnel's technical problem urgently to be solved.
Summary of the invention
The current-equalizing system and current equalizing method the object of the present invention is to provide a kind of power supply system and its independently bypassed, to reduce
The circulation between bypass loop in ups system.
In order to solve the above technical problems, the invention provides the following technical scheme:
A kind of current-equalizing system independently bypassed is applied in ups system, comprising:
There is the sampling unit of setting in each bypass loop, each sampling unit is used to detect itself place
Bypass loop size of current and be sent to controller；
The controller being all connected with each sampling unit and each current regulation unit is judged for working as
When any one size of current for being provided with the bypass loop of current regulation unit exceeds preset range, by the bypass loop
Current regulation unit the size of current of the bypass loop is adjusted in the preset range；
The current regulation unit at least one bypass loop is set.
Preferably, the current regulation unit is provided in each bypass loop in the ups system.
Preferably, the preset range is the range that the controller is set by following steps:
Using the size of current of target bypass loop as numerical value A；
By [A-a, A+b] be used as the preset range, wherein the target bypass loop be it is preset any one
Bypass loop, a and b are preset value and are all larger than equal to 0.
Preferably, in each current regulation unit, at least one current regulation unit is impedance adjustment module；
For the bypass loop for being provided with the impedance adjustment module, the controller is specifically used for:
When judging that any one is provided with the size of current of the bypass loop of impedance adjustment module beyond preset range,
By changing the impedance of the impedance adjustment module in the bypass loop, the size of current of the bypass loop is adjusted to described pre-
If in range.
Preferably, the impedance adjustment module is the impedance adjustment module including at least adjustable resistance.
Preferably, the initial impedance value of each impedance adjustment module by default is preset value, two-way to carry out
Current regulation.
Preferably, in each current regulation unit, at least one current regulation unit is to be arranged in bypass loop
Controllable switch；
For the bypass loop for being provided with the controllable switch, the controller is specifically used for:
When judging that any one is provided with the size of current of the bypass loop of controllable switch beyond preset range, pass through
Duration when opening frequency and/or opening every time for changing the controllable switch in the bypass loop, by the bypass loop
Size of current be adjusted in the preset range.
Preferably, each current regulation unit is the controllable switch being arranged in the bypass loop；
The controller is also used to: when the size of current for any one bypass loop for judging to receive exceeds default model
When the upper limit enclosed, by stopping the time for the controllable switch that extends in the bypass loop, by the size of current of the bypass loop
It is adjusted in the preset range；Wherein, it stops in the time described, the exchange input of the bypass loop reaches maximum value.
A kind of current equalizing method independently bypassed is applied in ups system, comprising:
Sampling unit in each bypass loop detects the size of current of the bypass loop where itself and is sent to control
Device processed；
Controller judges that any one is provided with the size of current of the bypass loop of current regulation unit and exceeds default model
When enclosing, the size of current of the bypass loop is adjusted to by the preset range by the current regulation unit in the bypass loop
It is interior.
A kind of power supply system, including the current-equalizing system described in any of the above embodiments independently bypassed.
Using technical solution provided by the embodiment of the present invention, it is applied in ups system, comprising: in each bypass loop
In have the sampling unit of setting, each sampling unit is used to detect size of current and the transmission of the bypass loop where itself
To controller；The controller being all connected with each sampling unit and each current regulation unit, for any one when judging
When the size of current of a bypass loop provided with current regulation unit exceeds preset range, pass through the electric current in the bypass loop
It adjusts unit the size of current of the bypass loop is adjusted in preset range；Electric current at least one bypass loop is set
Adjust unit.
In the scheme of the application, sampling unit can detecte the size of current of the bypass loop where itself and be sent to control
Device processed, the size of current of the adjustable bypass loop where itself of current regulation unit.Therefore, when controller is judged arbitrarily
When the size of current of one bypass loop for being provided with current regulation unit exceeds preset range, the bypass loop can be passed through
In current regulation unit, the size of current of the bypass loop is adjusted in preset range.Due to the electric current in bypass loop
Size has been adjusted in preset range, just advantageously reduces the circulation between the bypass loop in ups system.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of ups system in the prior art；
Fig. 2 is a kind of structural schematic diagram for the current-equalizing system independently bypassed that the present invention applies in ups system；
Fig. 3 is another structural schematic diagram for the current-equalizing system independently bypassed that the present invention applies in ups system；
Fig. 4 is the working state schematic representation of controllable switch in a kind of specific embodiment of the present invention；
Fig. 5 is the implementation flow chart for the current equalizing method independently bypassed that the present invention applies in ups system.
Specific embodiment
Core of the invention is to provide a kind of current-equalizing system independently bypassed, can be effectively reduced the side in ups system
Circulation between the circuit of road.
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiments are only a part of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Referring to FIG. 2, Fig. 2 is a kind of structural schematic diagram of the current-equalizing system independently bypassed in the present invention, the current-equalizing system
Applied in ups system, comprising:
There is the sampling unit 10 of setting in each bypass loop, each sampling unit 10 is used to detect itself place
Bypass loop size of current and be sent to controller.
3 bypass loops are all illustrated in Fig. 2 and Fig. 3 of the application, this is also the common design of ups system, but is needed
Illustrate, the scheme of the application is not limited in applying in the ups system with 3 bypass loops, for having other
The scheme of the application also can be implemented in the ups system of the bypass loop of quantity.In addition, Fig. 1 to Fig. 3 is three-phase four-wire system
The scheme of system, the application can also be applied in the systems such as three-phase three-wire system, and implementation of the invention is had no effect on.
A sampling unit 10 is provided in each bypass loop, each sampling unit 10 can be used for detecting itself institute
Bypass loop size of current and be sent to controller.Sampling unit 10 is when carrying out the detection of size of current, Ke Yizhi
The detection that correlated current detection part carries out size of current was connected, can also be matched by voltage check part and related device
It closes, current data is reconverted into after detecting associated voltage data, i.e. the physical circuit composition of sampling unit 10 can root
It is set and is adjusted according to actual needs, as long as the size of current of the bypass loop where being capable of detecting when itself, not
Influence implementation of the invention.
The size of current that each sampling unit 10 can will test is sent to controller, can be real-time transmission, can also
Being sent according to the preset period.
The controller being all connected with each sampling unit 10 and each current regulation unit 20, for any when judging
When the size of current of one bypass loop for being provided with current regulation unit 20 exceeds preset range, by the bypass loop
The size of current of the bypass loop is adjusted in preset range by current regulation unit 20；
Current regulation unit 20 at least one bypass loop is set.
It should be noted that controller is not shown in Fig. 2 and Fig. 3.Each sampling unit of controller and setting
10 and each current regulation unit 20 be all connected with, the size of current respectively detected can be sent to by each sampling unit 10
Controller.
The bypass loop of current regulation unit 20 is provided with for any one, controller can be to the electric current of the bypass loop
Data are judged, and then can be controlled the current regulation unit 20 in the bypass loop, to be returned by the bypass
Current regulation unit 20 in road, the size of current of the bypass loop is adjusted in preset range.
It should also be emphasized that being to be provided with current regulation list in each bypass loop in Fig. 2 and Fig. 3
Member 20, but in practical applications, it may not be in whole bypass loops, but in one or more bypass loops
Current regulation unit 20 is set.Such as in a kind of concrete scene, a certain road bypass loop in ups system electric current frequent occurrence
Abnormal situation, and other bypass loops are usually not in current anomaly, therefore electricity can only be arranged in the bypass loop
Stream adjusts unit 20.It is full in this kind of specific occasion due to not being respectively provided with current regulation unit 20 in each bypass loop
The foot stream demand independently bypassed of ups system, while again can save the cost.
In a kind of specific embodiment, it is contemplated that for the ease of controlling each bypass loop, cope with various unevenness
The case where stream, can be provided with current regulation unit 20 in each bypass loop in ups system.Such as with U, V, W tri-
The ups system of a bypass loop, and it is abnormal to assume that the road U electric current occurs, electric current is lower, if being only provided with electricity in the road V and the road W
Stream adjusts unit 20, although also can realize three Lu Junliu by reducing the electric current on the road V and the road W, can reduce system power.And
If having setting current regulation unit 20 in three Lu Zhongjun, the road U electric current is directly increased into normal range (NR), without reducing
The electric current on the road V and the road W also avoids unnecessary power consumption while facilitating adjusting.
Current regulation unit 20 can control the size of current of the bypass loop where itself, specific controlling party
Formula, which can according to need, to be chosen, in general, can be by way of adjusting direct impedance, or the conducting by adjusting itself
The mode of time controls the size of current of the bypass loop where itself.
Such as in a specific embodiment, in each current regulation unit 20, at least one current regulation unit 20
For impedance adjustment module；
For the bypass loop for being provided with impedance adjustment module, controller is specifically used for: when judging any one setting
When the size of current of the bypass loop of impedance adjustment module exceeds preset range, by changing the impedance in the bypass loop
The size of current of the bypass loop is adjusted in preset range by the impedance of adjustment module.
That is, current regulation unit 20 can adjust itself under the control of the controller in this kind of embodiment
Impedance.When controller judges that any one is provided with the size of current of the bypass loop of impedance adjustment module and is higher than preset range
The upper limit when, controller can send improve impedance associated control signal to current regulation unit 20, current regulation unit 20 is just
Signal content can be controlled based on the received, and adaptable raising is carried out to the impedance of itself.Certainly, current regulation unit 20
Position setting, it is required that the bypass when the direct impedance of current regulation unit 20 changes, where the current regulation unit 20
The impedance in circuit can change, such as be usually that current regulation unit 20 is connected in bypass loop.Correspondingly, when controller is sentenced
When the size of current of disconnected any one bypass loop out is lower than the lower limit of preset range, controller can send the low-impedance correlation of drop
Control signal to current regulation unit 20, current regulation unit 20 can control signal content based on the received, to itself
Impedance carries out adaptable reduction.
The specific composition of impedance adjustment module can be set and be adjusted according to actual needs, as long as can be realized to institute
The electric current of bypass loop be adjusted, have no effect on implementation of the invention.In the specific implementation, it is contemplated that adjust electricity
The scheme of resistance facilitates implementation, such as the impedance of the adjusting change impedance adjustment module of resistance value can be carried out by potentiometer
Value, and the cost of adjustable resistance is relatively low, and therefore, impedance adjustment module can be for including at least the impedance of adjustable resistance adjusting
Module.Certainly, in other embodiments, impedance adjustment module can also by resistance and/or capacitor and/or inductor combination and
At, can be realized impedance adjusting.In addition, controller can also pass through impedance adjustment module pair in some embodiments
The current phase of bypass loop carries out certain adjustment, i.e., realization amplitude and phase match.
Preset range described herein can be set and be adjusted according to actual needs, such as in ups system
Circulation size it is more sensitive when, the gap between the bound of preset range can be lower, thus to each bypass loop
Size of current realization is more accurately controlled.And when ups system to circulation have certain ability to bear when, preset range it is upper
Gap between lower limit can be larger, reduces the loss brought by frequent electric current adjusts, while also reducing to correlation
The requirement of device.
It should also be emphasized that preset range, which can be, just sets the fixed range finished in advance, it is also possible to a change
In the range of change, such as a kind of specific embodiment, preset range is the range that controller is set by following steps:
Step 1: using the size of current of target bypass loop as numerical value A；
Step 2: by [A-a, A+b] be used as preset range, wherein target bypass loop be it is preset any one
Bypass loop, a and b are preset value and are all larger than equal to 0.
Such as in a kind of specific embodiment, there are three bypass loop U, V and W for tool in ups system.Controller is by the road U
As target bypass loop, that is, the size of current for detecting the sampling unit 10 on the road U determines [A-a, A as numerical value A
+ b] it is used as preset range.A and b, which is preset, to be finished, since the numerical value A that detects is variable quantity, in this kind of embodiment
Preset range be variation range.As can be seen that being determined by the electric current of certain bypass-loop pre- in this kind of embodiment
If range, also mean that using the road electric current as benchmark, the bypass that controller can be provided with current regulation unit 20 to other is returned
Road is controlled, so that the difference of the electric current of these bypass loops and the reference current on the road is in a certain range, the range
Size is determined by a and b.And in the example using the road U as target bypass loop for be illustrated, can in other occasions
In advance by any one bypass loop as target bypass loop.
In addition, a and b are all larger than equal to 0, and usually, in order to avoid frequent current regulation, the value of a and b are logical
It often is all larger than 0, only in small part occasion, needs to control circulation in reduced levels, a and b can be disposed as 0.
When current regulation unit 20 is impedance adjustment module, the impedance value of impedance adjustment module in the initial state can also
To be set and be adjusted according to actual needs.Such as in a kind of specific embodiment, each impedance adjustment module is in default shape
Initial impedance value under state is equal to 0, that is to say, that by default, without passing through impedance adjustment module to bypass loop
Electric current adjustment is carried out, when ups system normal operation larger circulation does not occur, it is extra that the impedance adjustment module of setting will not introduce
Impedance, added losses can be reduced.
Further, in a kind of specific embodiment of the invention, each impedance adjustment module is by default
Initial impedance value is preset value, and to carry out bidirectional current adjusting, preset value is typically greater than 0 numerical value, compared to aforementioned reality
The scheme that initial impedance value is 0 in mode is applied, this kind of scheme can carry out the bidirectional modulation of electric current.I.e. if the resistance of default conditions
Anti- value is 0, and subsequent to be flowed by increasing impedance to realize, the initial impedance value in this kind of embodiment under default conditions is equal
It is preset value to carry out bidirectional current adjusting, is i.e. when the electric current of certain bypass-loop is excessive, the resistance of the bypass loop can be increased
The impedance value of anti-adjustment module is to reduce the current value of the bypass loop, correspondingly, can reduce the bypass when electric current is too small
The impedance value of the impedance adjustment module in circuit is to increase the current value of the bypass loop.
The specific value of the preset value, which can according to need, to be set and is adjusted, real by taking the product of power 40Kw as an example
Border bypass impedance is usually 100m Ω, and according to experiment when not using current share scheme, the nonuniform fluid of bypass loop is maximum
Do not exceed 25%.That is, the bypass loop impedance for the 40Kw product, setting 100*0.25=25 milliohm can expire
Foot application, will not bring too big loss.Further, it is contemplated that the balance of adjustable range and adjustable precision, this is default
The range of value can be 0.8 times to 1.2 times of 25m Ω, i.e., reasonable impedance value range is answered are as follows: bypasses the 25% of equivalent impedance
0.8-1.2 times.
In view of if the initial impedance value of each impedance adjustment module by default is equal to 0, although can drop
Low-loss, but when carrying out the stream of ups system, since the impedance value of each impedance adjustment module can only be increased to reduce electricity
Stream, that is, can only be realized by way of reducing electric current and be flowed, so that use occasion is limited.And in this kind of embodiment, due to each
The initial impedance value of a impedance adjustment module by default is all larger than 0, so that when being flowed, it can be from increase impedance
And reduces the two directions of impedance and carry out electric current adjustment, the i.e. bypass loop for being arbitrarily provided with impedance adjustment module all the way
For, it can increase or reduce the road electric current.For example, having in ups system, there are three bypass loop U, V and W, and the road U and V
Road is provided with impedance adjustment module, and the initial impedance value of the two impedance adjustment modules by default is all larger than 0, controller
Only need to using the electric current on the road W as benchmark, no matter the road the U/road W electric current be it is higher or relatively low, be adjusted to the road W with can be convenient electric
Near flow valuve.As can be seen that the initial impedance value of each impedance adjustment module by default is all larger than 0 scheme, due to
Electric current is two-way adjustable, improves the convenience of adjusting, and the two-way being particularly suitable in three tunnel bypass loops is provided with impedance tune
Save the occasion of module.
In a kind of specific embodiment of the invention, Fig. 3 is seen, in each current regulation unit 20, at least one
Current regulation unit 20 is the controllable switch being arranged in bypass loop；
For the bypass loop for being provided with controllable switch, controller is specifically used for:
When judging that any one is provided with the size of current of the bypass loop of controllable switch beyond preset range, pass through
Duration when opening frequency and/or opening every time for changing the controllable switch in the bypass loop, by the bypass loop
Size of current be adjusted in preset range.
In view of leading for IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor)
Logical pressure drop is low, driving power very little, energy conservation, and switching speed is fast, is applicable in higher switching frequency, therefore each electricity
Stream adjust unit 20 all can be IGBT, the control terminal of each IGBT connect with controller.Certainly, in other embodiments,
Also other kinds of switching device can be used, the control that can receive controller carries out the switching of on off operating mode, not
Influence implementation of the invention.
Duration when opening frequency and opening every time of controllable switch, which will affect, inputs the period in an exchange
The turn-on time of interior controllable switch.Therefore, controller to controllable switch open frequency and/or every time open when it is lasting when
Length is controlled, and can be controlled turn-on time of the controllable switch within an exchange input period, and then to this
The size of current of bypass loop where controllable switch is controlled.Duration when opening every time is fixed, and frequency is opened
When raising, the size of current of the bypass loop where the controllable switch can be improved.It is fixed when opening frequency, holding when opening every time
When continuous duration improves, the size of current of the bypass loop where the controllable switch can be improved.
Further, in a specific embodiment, it is contemplated that the size of current of each bypass loop would generally meet
Preset range only in small part occasion, can have the case where size of current of bypass loop is beyond preset range, and work as this
When kind occurs beyond the case where preset range, usually it is the upper limit that size of current is higher than preset range, that is, electric current mistake occurs
Big situation.Therefore, in this kind of embodiment, at runtime, the working condition of default is constant conduction state to controllable switch.?
That is can control controllable switch when controller judges the size of current of bypass loop within a preset range and be in lasting
The state of conducting.And when controller judge bypass loop size of current be higher than preset range the upper limit when, can control by this
The controllable switch in road circuit can depend on what controller received according to certain switching frequency operation, specific switching frequency
The size of current of the bypass loop, but would generally be higher frequency, such as in Fig. 4, controllable switch does exchange input waveform
High frequency cutting.In addition, the duration when controllable switch in this kind of embodiment is opened every time can be the fixed value of default,
So as to the design of scheme.In this kind of embodiment, since in most cases, controllable switch is in the state of constant conduction,
Switching loss can be reduced, and is also beneficial to improve power supply efficiency.
In a kind of specific embodiment of the invention, controller is also used to: by any one for judging to receive
When the size of current in road circuit exceeds the upper limit of preset range, pass through when the stopping of the controllable switch extended in the bypass loop
Between, the size of current of the bypass loop is adjusted in preset range；Wherein, within the time of stopping, the exchange of the bypass loop
Input reaches maximum value.
In this kind of embodiment, when controller judges the size of current of any one bypass loop received beyond pre-
If when the upper limit of range, illustrating that the electric current of the bypass loop is excessive, controller passes through this extended in the bypass loop and controllably opens
What is closed stops the time to adjust size of current.Within the time of stopping, the exchange input of the bypass loop reaches maximum value, that is,
It says, will be when exchange input to be near wave crest when controller judges that electric current is excessive, the controllable switch for controlling the road is in
Off-state also allows for the current amplitude decline of the exchange input on the road, reaches the size of current for reducing the bypass loop
Purpose.
Using the current-equalizing system independently bypassed provided by the embodiment of the present invention, it is applied in ups system, comprising: each
There is the sampling unit of setting in a bypass loop, each sampling unit is used to detect the electric current of the bypass loop where itself
Size is simultaneously sent to controller；The controller being all connected with each sampling unit and each current regulation unit is sentenced for working as
When size of current of disconnected any one bypass loop provided with current regulation unit out exceeds preset range, passes through the bypass and return
The size of current of the bypass loop is adjusted in preset range by the current regulation unit in road；Setting bypasses back at least one
Current regulation unit in road.
In the scheme of the application, sampling unit can detecte the size of current of the bypass loop where itself and be sent to control
Device processed, the size of current of the adjustable bypass loop where itself of current regulation unit.Therefore, when controller is judged arbitrarily
When the size of current of one bypass loop for being provided with current regulation unit exceeds preset range, the bypass loop can be passed through
In current regulation unit, the size of current of the bypass loop is adjusted in preset range.Due to the electric current in bypass loop
Size has been adjusted in preset range, just advantageously reduces the circulation between the bypass loop in ups system.
Corresponding to the system above embodiment, the embodiment of the invention also provides a kind of current equalizing methods independently bypassed, can
Reference is corresponded to each other with above.The current equalizing method independently bypassed is applied in ups system, sees Fig. 5, including following step
It is rapid:
Step S101: the sampling unit in each bypass loop detects the size of current of the bypass loop where itself simultaneously
It is sent to controller；
Step S102: it is super that controller judges that any one is provided with the size of current of the bypass loop of current regulation unit
Out when preset range, the size of current of the bypass loop is adjusted to by default model by the current regulation unit in the bypass loop
In enclosing.
In a kind of specific embodiment of the invention, electric current tune is provided in each bypass loop in ups system
Save unit.
In a kind of specific embodiment of the invention, preset range is the range that controller is set by following steps:
Using the size of current of target bypass loop as numerical value A；
By [A-a, A+b] be used as preset range, wherein target bypass loop be it is preset any one bypass back
Road, a and b are preset value and are all larger than equal to 0.
In a kind of specific embodiment of the invention, in each current regulation unit, at least one current regulation unit
For impedance adjustment module；
For the bypass loop for being provided with impedance adjustment module, pass through the electric current tune in the bypass loop in step S102
The size of current of the bypass loop is adjusted in preset range by section unit, specifically:
By changing the impedance of the impedance adjustment module in the bypass loop, the size of current of the bypass loop is adjusted
Into preset range.
In a kind of specific embodiment of the invention, impedance adjustment module is the impedance adjusting including at least adjustable resistance
Module.
In a kind of specific embodiment of the invention, the initial impedance value of each impedance adjustment module by default
It is all larger than 0.
In a kind of specific embodiment of the invention, in each current regulation unit, at least one current regulation unit
For the controllable switch in bypass loop is arranged in；
For the bypass loop for being provided with controllable switch, pass through the current regulation unit in the bypass loop in step S102
The size of current of the bypass loop is adjusted in preset range, specifically:
By changing duration when opening frequency and/or opening every time of the controllable switch in the bypass loop,
The size of current of the bypass loop is adjusted in preset range.
In a kind of specific embodiment of the invention, further includes:
When controller judges the size of current of any one bypass loop received beyond the upper limit of preset range,
By stopping the time for the controllable switch that extends in the bypass loop, the size of current of the bypass loop is adjusted to default model
In enclosing；Wherein, within the time of stopping, the exchange input of the bypass loop reaches maximum value.
Corresponding to above method and system embodiment, the embodiment of the invention also provides a kind of power supply system, the power supplies
System may include the current-equalizing system independently bypassed in any of the above-described embodiment, herein not repeated explanation.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with it is other
The difference of embodiment, same or similar part may refer to each other between each embodiment.For side disclosed in embodiment
For method, since it is corresponding with system disclosed in embodiment, so being described relatively simple, related place is referring to components of system as directed
Explanation.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand technical solution of the present invention and its core concept.It should be pointed out that for the common of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for technical staff, these
Improvement and modification are also fallen within the protection scope of the claims of the present invention.
Claims (10)
1. a kind of current-equalizing system independently bypassed, which is characterized in that be applied in ups system, comprising:
There is the sampling unit of setting in each bypass loop, each sampling unit is used to detect the side where itself
The size of current in road circuit is simultaneously sent to controller；
The controller being all connected with each sampling unit and each current regulation unit, for any when judging
When the size of current of one bypass loop for being provided with current regulation unit exceeds preset range, pass through the electricity in the bypass loop
Stream adjusts unit and the size of current of the bypass loop is adjusted in the preset range；
The current regulation unit at least one bypass loop is set.
2. the current-equalizing system according to claim 1 independently bypassed, which is characterized in that each side in the ups system
The current regulation unit is provided in the circuit of road.
3. the current-equalizing system independently bypassed according to claim 1, which is characterized in that the preset range is the control
The range that device processed is set by following steps:
Using the size of current of target bypass loop as numerical value A；
[A-a, A+b] is used as the preset range, wherein the target bypass loop is any one preset bypass
Circuit, a and b are preset value and are all larger than equal to 0.
4. the current-equalizing system according to any one of claims 1 to 3 independently bypassed, which is characterized in that each electric current
It adjusts in unit, at least one current regulation unit is impedance adjustment module；
For the bypass loop for being provided with the impedance adjustment module, the controller is specifically used for:
When judging that any one is provided with the size of current of the bypass loop of impedance adjustment module beyond preset range, pass through
The size of current of the bypass loop is adjusted to the default model by the impedance for changing the impedance adjustment module in the bypass loop
In enclosing.
5. the current-equalizing system according to claim 4 independently bypassed, which is characterized in that the impedance adjustment module is at least
Impedance adjustment module including adjustable resistance.
6. the current-equalizing system according to claim 4 independently bypassed, which is characterized in that each impedance adjustment module is being defaulted
Initial impedance value under state is preset value, to carry out bidirectional current adjusting.
7. the current-equalizing system according to claim 1 independently bypassed, which is characterized in that each current regulation unit
In, at least one current regulation unit is the controllable switch being arranged in bypass loop；
For the bypass loop for being provided with the controllable switch, the controller is specifically used for:
When judging that any one is provided with the size of current of the bypass loop of controllable switch beyond preset range, pass through change
Duration when opening frequency and/or opening every time of the controllable switch in the bypass loop, by the electricity of the bypass loop
Stream size is adjusted in the preset range.
8. the current-equalizing system according to claim 7 independently bypassed, which is characterized in that each current regulation unit is equal
For the controllable switch being arranged in the bypass loop；
The controller is also used to: when the size of current for any one bypass loop for judging to receive is beyond preset range
When the upper limit, by stopping the time for the controllable switch that extends in the bypass loop, the size of current of the bypass loop is adjusted
Into the preset range；Wherein, it stops in the time described, the exchange input of the bypass loop reaches maximum value.
9. a kind of current equalizing method independently bypassed, which is characterized in that be applied in ups system, comprising:
Sampling unit in each bypass loop detects the size of current of the bypass loop where itself and is sent to controller；
When controller judges that any one is provided with the size of current of the bypass loop of current regulation unit beyond preset range,
The size of current of the bypass loop is adjusted in the preset range by the current regulation unit in the bypass loop.
10. a kind of power supply system, which is characterized in that including the stream system as claimed in any one of claims 1 to 8 independently bypassed
System.
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