CN105226810B - More ups system power supply synchronization system and methods - Google Patents
More ups system power supply synchronization system and methods Download PDFInfo
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Abstract
The invention provides a kind of more ups system power supply synchronization system and methods, the system includes N number of ups system, and the N is the integer more than or equal to 2；N number of ups system is connected by LBS cables, and wherein LBS cables include synchronous bus and competition bus；Each ups system includes characteristic pulse transmitting element, signal processing unit and synchronizing signal transmitting element, wherein：The characteristic pulse transmitting element, for sending characteristic pulse to the competition bus of the LBS cables；The detecting signal unit, judge LBS master synchronizers for the synchronous bus according to LBS cables and the signal of competition bus；The synchronizing signal transmitting element, for sending synchronizing signal to the synchronous bus of LBS cables.The present invention can conveniently realize that the output of multiple ups systems is synchronous by increasing competition bus in traditional LBS cables.
Description
Technical field
The present invention relates to uninterrupted power source power supply field, more specifically to a kind of more ups system power supply synchronization systems
And method.
Background technology
As information technology rapid development and the progress of Power Electronic Technique, people are increasingly recognized that ups system is being protected
The importance in terms of data is protected, therefore application of the ups system in fields such as industry, communication, aerospace, military project and family lives is more next
It is more extensive.
Ups system still can there are the risk of power down during longtime running, such as ups system input source falls
Electricity turns battery powered and battery discharge is to after EOD, and load will power down；There is failure in ups system, also result in UPS systems in itself
System transfers bypass power supply to, and ups system is commonly considered as insecure in bypass power supply, power down risk be present.
Therefore in some very important occasions, in order to further reduce the risk of device looses power, ups system fortune is improved
Reliability during row, it will usually form double-bus electric power system supplying power for outside, or more than two sets UPS using two sets of ups systems
System forms the mode supplying power for outside of ELBS electric power systems, and ought ups system all the way out-put supply be unsatisfactory for load supplying will
When asking, load is cut toward another way ups system by the way that load selector switch (such as STS) is automatic, so as to proof load power supply not between
It is disconnected.
As shown in figure 1, it is the schematic diagram using the ups system of LBS structures.First ups system 11 and the second ups system 12
Load is connected to via same load selector switch 13 respectively, and is led between the ups system 12 of the first ups system 11 and second
LBS line synchronous signal transmissions are crossed, to realize the synchronization between the first ups system 11 and the second ups system 12, ensure passing through load
It is as small as possible to the impact of load, break time is as short as possible when selecting switch switches over.But above-mentioned LBS structures is
System is merely able to realize that the out-put supply between two sets of ups systems is synchronous.
As shown in Fig. 2 being the schematic diagram of the ups system of ELBS structures, multiple ups systems select through load two-by-two in the structure
Select after switching to load supplying, so as to realize reliable power supply of multiple ups systems to load.It is each in the system of said structure
There is a fixed ups system by LBS line synchronous signal transmissions between ups system, and in multiple ups systems as main same
Device is walked, other ups systems are to be used as from synchronizer.As the UPS systems tracked from the ups system of synchronizer as master synchronizer
System.But in the structure, due to a fixed ups system can only be set as master synchronizer, the phases of other ups systems all with
The track ups system as master synchronizer, once master synchronizer failure, then will be unable to keep synchronous between other ups systems, from
And can not recomposition LBS powering modes.In Fig. 2, once the failure of the 3rd ups system 23 as master synchronizer, then the first UPS
The ups system 22 of system 21 and second can not be synchronous, so as to which load selector switch 26 is when carrying out load switching, can there is relatively strong winds
Danger, greatly reduce the practicality of ups system.
The content of the invention
The technical problem to be solved in the present invention is, is asked for above-mentioned ups system synchronous tracking system practicality is poor
A kind of topic, there is provided more ups system power supply synchronization system and methods.
The technical scheme that the present invention solves above-mentioned technical problem is to provide a kind of power supply synchronization system of more ups systems, wraps
Include N number of ups system and N number of ups system is connected by LBS cables, the N is the integer more than or equal to 2；The LBS lines
Cable includes synchronous bus and competition bus, and N number of ups system realizes synchronous transmission of signal by synchronous bus；
Each ups system includes characteristic pulse transmitting element, detecting signal unit and synchronizing signal transmitting element,
Wherein：
The characteristic pulse transmitting element, for sending characteristic pulse, and the multiple ups system to the competition bus
Width from characteristic pulse transmitting element to the characteristic pulse transmitted by competition bus it is different；
The detecting signal unit, for detecting the competition bus of LBS cables and the signal of synchronous bus, and according to detection
Signal judge where ups system whether be master synchronizer；The detecting signal unit meets to competition bus in this ups system
The condition of characteristic pulse is sent, and the width of the characteristic pulse in competition bus is less than or equal to the feature that this ups system is sent
During pulsewidth, it is master synchronizer to confirm this ups system；
The synchronizing signal transmitting element, for sending synchronous letter to synchronous bus when this ups system is master synchronizer
Number.
In more ups system power supply synchronization systems of the present invention, the characteristic pulse transmitting element is only in place UPS
Just characteristic pulse is sent when system is load supplying to competition bus.
In more ups system power supply synchronization systems of the present invention, the numbering of N number of ups system is respectively 1,
2nd ..., N-2, N-1, N, and the width of the characteristic pulse of the characteristic pulse transmitting element transmission of each ups system meets following bar
Part：T_1>T_2+T_3 ...+T_n, T_2>T_3 ...+T_n ..., T_n-2>T_n-1+T_n, T_n-1>T_n；
Wherein, T_1 be numbering be 1 ups system characteristic pulse transmitting element send characteristic pulse width, T_2
The width for the characteristic pulse that the characteristic pulse transmitting element for the ups system for being 2 for numbering is sent, T_n are the UPS systems that numbering is N
The width for the characteristic pulse that the characteristic pulse transmitting element of system is sent, T_n-2 are the characteristic pulse for the ups system that numbering is N-2
The width for the characteristic pulse that transmitting element is sent, T_n-1 are that the characteristic pulse transmitting element for the ups system that numbering is N-1 is sent
Characteristic pulse width.
In more ups system power supply synchronization systems of the present invention, the characteristic pulse of each ups system sends list
When the width and ups system where this for the characteristic pulse that member is sent when place ups system is bypass power supply are inversion power supply
The width of the characteristic pulse of transmission is different；The numbering of N number of ups system is respectively 1,2 ..., N-2, N-1, N, and each UPS
The width for the characteristic pulse that the characteristic pulse transmitting element of system is sent meets following condition：T_1>T_2+T_3…+T_n+T_n+
1+T_n+2 ...+T_n+n, T_2>T_3 ...+T_n+T_n+1+T_n+2 ...+T_n+n ..., T_n+n-2>T_n+n-1+T_n+n, T_
n+n-1>T_n+n；
Wherein, T_1 is that the characteristic pulse transmitting element for the ups system that numbering is 1 is in bypass power supply in place ups system
When width, the T_n+1 of the characteristic pulse that send be the characteristic pulse transmitting element for the ups system that numbering is 1 in place ups system
The width of the characteristic pulse sent when being powered in inversion, T_2 are that the characteristic pulse transmitting element for the ups system that numbering is 2 exists
Width, the T_n+2 that place ups system is in the characteristic pulse sent during bypass power supply are the feature arteries and veins for the ups system that numbering is 2
The width that transmitting element is in the characteristic pulse sent during inversion power supply in place ups system is rushed, T_n is the UPS systems that numbering is N
Width, the T_n+n for the characteristic pulse that the characteristic pulse transmitting element of system is sent when place ups system is in bypass power supply are volume
Number be in the width of characteristic pulse sent when inversion is powered in place ups system for the characteristic pulse transmitting element of N ups system
Degree, T_n+n-2 are that the characteristic pulse transmitting element for the ups system that numbering is N-2 is sent out when place ups system is in inversion power supply
The width of the characteristic pulse sent, T_n+n-1 are the characteristic pulse transmitting element for the ups system that numbering is N-1 in place ups system
The width of the characteristic pulse sent when being powered in inversion.
In more ups system power supply synchronization systems of the present invention, the synchronizing signal transmitting element is at ups system
When different powering modes, it is different to send synchronizing signal type to synchronous bus；The detecting signal unit is only in synchronous bus
On synchronizing signal type and place ups system powering mode difference when, ups system where confirming is master synchronizer.
The present invention a kind of more ups system power supply synchronization methods are also provided, for realize N number of ups system power supply synchronization and
N number of ups system is connected by LBS cables, and the N is the integer more than or equal to 2, and the LBS cables include synchronous bus
And competition bus, each ups system perform following steps：
(a) signal of the competition bus of current ups system detection LBS cables and synchronous bus, the signal are included by N number of
The characteristic pulse that one or more of ups system is sent to competition bus respectively, and the characteristic pulse that each ups system is sent
Width it is different；
(b) whether the ups system according to where judging the signal of detection is master synchronizer, if master synchronizer then performs step
(c) step (d), is otherwise performed；
(c) current ups system sends synchronizing signal to synchronous bus；
(d) synchronizing signal in current ups system tracking synchronous bus；
The current feature of the ups system in this ups system sends characteristic pulse and competition bus into competition bus
When the width of pulse is less than or equal to the width for the characteristic pulse that current ups system is sent, synchronization based on current ups system is confirmed
Device.
In more ups system power supply synchronization methods of the present invention, in the step (c), difference is in ups system
During powering mode, it is different to send synchronizing signal type to synchronous bus；Synchronous letter in the step (b) only on synchronous bus
When number type and the powering mode difference of place ups system, ups system where confirming is master synchronizer.
In more ups system power supply synchronization methods of the present invention, the powering mode of the ups system includes bypass mould
Formula or inverter mode；The current ups system is only just sent when bypass mode or inverter mode are powered to the competition bus
Characteristic pulse.
More ups system power supply synchronization system and methods of the present invention, it is total by increasing competition between different ups systems
Line so that each ups system can be used as master synchronizer to send synchronizing signal to synchronous bus, to realize each ups system
Phase angle is synchronous.The present invention can be avoided in more ups system electric power systems of existing fixed master synchronizer, master synchronizer failure and lead
The problem of causing all ups systems synchronous, improve the reliability of system power supply.
Brief description of the drawings
Fig. 1 is the topology diagram of the ups system electric power system of existing LBS structures.
Fig. 2 is the topology diagram of the ups system electric power system of existing ELBS structures.
Fig. 3 is the schematic diagram of the more ups system power supply synchronization system embodiments of the present invention.
Fig. 4 is the structural representation of ups system in Fig. 3.
Fig. 5 is the schematic flow sheet of the more ups system power supply synchronization method first embodiments of the present invention.
Fig. 6 is the schematic flow sheet of the more ups system power supply synchronization method second embodiments of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 3,4, it is the schematic diagram of the more ups system power supply synchronization system embodiments of the present invention.In the present embodiment
More ups system power supply synchronization systems include N number of ups system 31 (N is the integer more than or equal to 2, and three are illustrate only in Fig. 3)
And N number of ups system 31 is connected by LBS cables, wherein LBS cables include synchronous bus 34 and competition bus 35.With it is existing
ELBS structures ups system electric power system it is similar, N number of ups system 31 is realized same by synchronous bus 34 (i.e. LBS cables)
Step signal (i.e. LBS lock-out pulses) is transmitted and adjacent two ups systems 31 are connected to via same load selector switch 32
One load 33.Above-mentioned each ups system 31 can be loose pattern block, can be also by the set of multiple UPS monomers module compositions.
In above-mentioned N number of ups system 31, fixed master synchronizer is not provided with, but it is total by increasing competition in LBS cables
Line 35 causes each ups system 31 to turn into master synchronizer, and synchronizing signal is sent to other ups systems 31.The competition bus
35 can use single cable, can also use two cables, so as to reduce interference in a differential manner.
Specifically, N number of ups system 31 is connected into ring topology by competition bus 35, and each ups system 31 includes feature
Pulse transmitting element 311, detecting signal unit 312 and synchronizing signal transmitting element 313.Features described above pulse transmitting element
311st, detecting signal unit 312 and synchronizing signal transmitting element 313 can specifically combine the software structure for being integrated into ups system 31
Into.
Characteristic pulse transmitting element 311 is used to send characteristic pulse, and the feature of multiple ups systems 31 to competition bus 35
The width for the characteristic pulse that pulse transmitting element 311 is sent is different.Detecting signal unit 312 is used to detect LBS cables
The synchronizing signal in characteristic pulse signal and synchronous bus in competition bus, and the UPS according to where judging the signal of detection
Whether system 31 is master synchronizer.Synchronizing signal transmitting element 313 be used for when ups system where confirmation 31 is master synchronizer to
Synchronous bus 34 sends synchronizing signal, other ups systems is all tracked the synchronizing signal, realizes that the phase angle of each ups system is same
Step.
In above-mentioned more ups system power supply synchronization systems, without a certain ups system 31 is arranged into master synchronizer (LBS master
Machine), each ups system 31 competes out master synchronizer automatically according to the running status of system.Once the UPS systems as master synchronizer
Unite 31 failures, then remaining ups system 31 can compete out a new master synchronizer at once, to ensure more ups system power supply synchronizations
The master synchronizer moment in system is present, so as to realize the synchronization of N number of ups system 31 at any time, it is ensured that load
Security when selecting switch (STS) 32 switches.
To avoid the characteristic information in competition bus 35 excessive, UPS system of the characteristic pulse transmitting element 311 only where it
System 31 for the corresponding power supply of load 33 (i.e. bypass power supply or inversion are powered) when, just to sending corresponding feature in competition bus 35
Pulse (meets the condition that characteristic pulse is sent to competition bus 35).The detecting signal unit 312 of other ups systems 31 receives
To after characteristic information, by arbitration, master synchronizer is determined.
Especially, above-mentioned detecting signal unit 312 meets the bar that characteristic pulse is sent to competition bus 35 in this ups system
Part, and the width of the characteristic pulse in competition bus 35 is less than or equal to the characteristic pulse transmitting element 311 of place ups system 31
During the width of the characteristic pulse of transmission, ups system 31 where confirming is master synchronizer.I.e. in the ups system of all normal operations
In 31, a ups system 31 for sending the width maximum of characteristic pulse is used as master synchronizer.
It is 1 that above-mentioned N number of ups system 31 can number respectively, 2 ..., N-2, N-1, N be (if same ups system 31 is by multiple lists
Module is formed, then the plurality of monomer module has one and is identically numbered).To avoid characteristic information (such as characteristic pulse) folded
Adding to differentiate, and the width of the characteristic pulse of the transmission of characteristic pulse transmitting element 311 of each ups system 31 meets following bar
Part：T_1>T_2+T_3 ...+T_n, T_2>T_3 ...+T_n ..., T_n-2>T_n-1+T_n, T_n-1>T_n；Wherein, T_1 is volume
Number for 1 ups system 31 characteristic pulse transmitting element 311 send characteristic pulse width, T_2 be numbering be 2 UPS systems
The width for the characteristic pulse that the characteristic pulse transmitting element 311 of system 31 is sent, T_n are the feature arteries and veins for the ups system 31 that numbering is N
The width of the characteristic pulse of the transmission of transmitting element 311 is rushed, T_n-2 is that the characteristic pulse for the ups system 31 that numbering is N-2 sends list
The width for the characteristic pulse that member 311 is sent, T_n-1 are that the characteristic pulse transmitting element 311 for the ups system 31 that numbering is N-1 is sent out
The width of the characteristic pulse sent.
Above-mentioned each ups system 31 can also preferentially track bypass source, and now the characteristic pulse of each ups system 31 sends single
Member 311 can send characteristic pulse according to the power supply state of place ups system 31, i.e., when place ups system 31 is bypass power supply
The width of the characteristic pulse of transmission is different from the width that ups system 31 where this is the characteristic pulse sent when inversion is powered.
Specifically, when the numbering of N number of ups system 31 is respectively 1,2 ..., N-2, N-1, N when, the characteristic pulse hair of each ups system 31
The width of the characteristic pulse of the transmission of unit 311 is sent to meet following condition：T_1>T_2+T_3…+T_n+T_n+1+T_n+2…+T_n
+ n, T_2>T_3 ...+T_n+T_n+1+T_n+2 ...+T_n+n ..., T_n+n-2>T_n+n-1+T_n+n, T_n+n-1>T_n+n；
Wherein, T_1 is that the characteristic pulse transmitting element 311 for the ups system 31 that numbering is 1 is in place ups system 31
Width, the T_n+1 of the characteristic pulse sent during bypass power supply are the characteristic pulse transmitting element 311 for the ups system 31 that numbering is 1
At place, ups system 31 is in the width of the characteristic pulse sent during inversion power supply, and T_2 is the spy for the ups system 31 that numbering is 2
Width, the T_n+2 for the characteristic pulse that sign pulse transmitting element 311 is sent when place ups system 31 is in bypass power supply are volume
Number be in the feature that sends when inversion is powered in place ups system 31 for the characteristic pulse transmitting element 311 of 2 ups system 31
The width of pulse, T_n are that the characteristic pulse transmitting element 311 for the ups system 31 that numbering is N is in side in place ups system 31
Width, the T_n+n for the characteristic pulse that road is sent when powering are that the characteristic pulse transmitting element 311 for the ups system 31 that numbering is N exists
Place ups system 31 is in the width of the characteristic pulse sent during inversion power supply, and T_n+n-2 is the ups system 31 that numbering is N-2
Characteristic pulse transmitting element 311 width of characteristic pulse sent during inversion power supply, T_n+n- are in place ups system 31
1 is that the characteristic pulse transmitting element 311 for numbering the ups system 31 for being N-1 is sent when place ups system 31 is in inversion power supply
Characteristic pulse width.
Further, in order to avoid the frequent switching of master synchronizer, the synchronization of the ups system 31 as master synchronizer can be made
Signal pulse is divided into two kinds of different width types, while adds the rule of competition：If will be main according to the width of characteristic pulse
Synchronizer competition come after, the ups system 31 send synchronizing signal pulse width sent with a upper master synchronizer it is same
It is the same to walk the pulse width type of signal, then it is assumed that this time main frame competition is invalid, it should to be avoided.I.e. as main same
Walk the synchronizing signal transmitting element 313 of the ups system 31 of device, when the ups system 31 at place is in different powering modes, Xiang Tong
Walk bus 34 and send synchronizing signal type difference, and the detecting signal unit 312 of other ups systems 31 is only on synchronous bus 31
Synchronizing signal type with its where ups system 31 powering mode difference when, just confirm place ups system 31 be master synchronizer
(characteristic pulse meets master synchronizer condition).
For example, definable as the ups system 31 for master synchronizer synchronizing signal transmitting element 313 in ups system 31
In bypass power supply, the wide lock-out pulses of LBS are sent；When inversion is powered, the narrow lock-out pulses of LBS are sent.If a certain ups system
31 detect on synchronous bus 34 to be wide lock-out pulse, even if the characteristic pulse transmitting element 311 of the machine feature arteries and veins to be sent
The characteristic pulse pulse width that pulse width is more than current master synchronizer is rushed, the characteristic pulse transmitting element 311 of the machine also will not
Characteristic pulse is sent, it is still wide toward sending on synchronous bus 34 to avoid the occurrence of after the machine comes the competition of master synchronizer identity
Lock-out pulse.
As shown in figure 5, being the schematic diagram of the more ups system power supply synchronization method first embodiments of the present invention, this method is used for
Realize the power supply synchronization of N number of ups system and N number of ups system is in turn connected into ring topology by synchronous bus, it is above-mentioned N number of
Ups system realizes synchronous transmission of signal by synchronous bus and adjacent two ups systems are via same load selector switch
A load is connected to, wherein N is the integer more than or equal to 2.Above-mentioned N number of ups system also connects cyclization by competition bus
Shape topology, each ups system perform following steps：
Step S41：Signal in the competition bus and synchronous bus of current ups system detection LBS cables, above-mentioned signal bag
Include the characteristic pulse sent from one or more of N number of ups system to competition bus, and the feature that each ups system is sent
The width of pulse is different.Especially, current ups system is total to competition only when being load supplying by load selector switch
Line sends characteristic pulse (i.e. now ups system meets the condition that characteristic pulse is sent to competition bus).
Step S42：Whether the ups system according to where judging characteristic pulse is master synchronizer, if master synchronizer then performs
Step S43, otherwise perform step S44.In this step, characteristic pulse that specifically can be in current ups system in competition bus
Width be less than or equal to current ups system send characteristic pulse width when, it is master synchronizer to confirm current ups system.
Step S43：Current ups system sends synchronizing signal to synchronous bus.
Step S44：Synchronizing signal in current ups system tracking synchronous bus.
To avoid the frequent switching of master synchronizer, in step S43, when ups system is in different powering modes, Xiang Tong
Walk bus and send synchronizing signal type difference；Correspondingly, in step S42, synchronizing signal type only on synchronous bus with
During the powering mode difference of place ups system, ups system where confirming is master synchronizer.
As shown in fig. 6, being the schematic diagram of the more ups system power supply synchronization method first embodiments of the present invention, this method is used for
Realize the power supply synchronization of N number of ups system and N number of ups system is in turn connected into ring topology by synchronous bus, it is above-mentioned N number of
Ups system realizes synchronous transmission of signal by synchronous bus and adjacent two ups systems are via same load selector switch
A load is connected to, wherein N is the integer more than or equal to 2.Above-mentioned N number of ups system also connects cyclization by competition bus
Shape topology, each ups system perform following steps：
Step S61：Judge whether the machine (i.e. ups system) sends characteristic pulse to competition bus and competition bus
Characteristic pulse pulse width whether be less than or equal to the machine send characteristic pulse pulse width, if the machine just sends spy
The pulse width for levying the characteristic pulse in pulse to competition bus and competition bus is less than or equal to the characteristic pulse that the machine is sent
Pulse width, then perform step S612, otherwise perform step S613.
Step S612：It is main frame (i.e. master synchronizer) to put the machine, then performs step S614.
Step S613：It is slave (i.e. non-master synchronizer) to put the machine, and follows the synchronizing signal on synchronous bus, is then held
Row step S614.
Step S614：Judge whether the machine is main frame, perform step S615 if the machine is main frame, otherwise perform step
S620。
Step S615：Judge that the machine is current whether for load supplying, if then performing step S616, otherwise perform step
S618。
Step S616：The machine sends synchronizing signal to synchronous bus, and performs step S617.
Step S617：The machine sends characteristic pulse to competition bus.
Step S618：The machine stops sending synchronizing signal to synchronous bus, and performs step S619.
Step S619：The machine stops sending characteristic pulse to competition bus.
Step S620：Judge that the machine is current whether for load supplying, if then performing step S621, otherwise perform step
S622。
Step S621：The machine sends characteristic pulse to competition bus.
Step S622：The machine stops sending characteristic pulse to competition bus.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (8)
1. a kind of more ups system power supply synchronization systems, including N number of ups system and N number of ups system are connected by LBS cables,
The N is the integer more than or equal to 2；It is characterized in that：The LBS cables include synchronous bus and competition bus, and the N
Individual ups system realizes synchronous transmission of signal by synchronous bus；
Each ups system includes characteristic pulse transmitting element, detecting signal unit and synchronizing signal transmitting element, its
In：
The characteristic pulse transmitting element, for sending characteristic pulse, and the spy of N number of ups system to the competition bus
The width for levying pulse transmitting element to the characteristic pulse transmitted by competition bus is different；
The detecting signal unit, for detecting the competition bus of LBS cables and the signal of synchronous bus, and according to the letter of detection
Whether ups system where number judging is master synchronizer；The detecting signal unit meets to send to competition bus in this ups system
The condition of characteristic pulse, and the width of the characteristic pulse in competition bus is less than or equal to the feature pulsewidth that this ups system is sent
When, it is master synchronizer to confirm this ups system；
The synchronizing signal transmitting element, for sending synchronizing signal to synchronous bus when this ups system is master synchronizer.
2. more ups system power supply synchronization systems according to claim 1, it is characterised in that the characteristic pulse sends single
Member just sends characteristic pulse only when place ups system is load supplying to competition bus.
3. more ups system power supply synchronization systems according to claim 1, it is characterised in that：The volume of N number of ups system
Number be respectively 1,2 ..., N-2, N-1, N, and each ups system characteristic pulse transmitting element send characteristic pulse width
Meet following condition：T_1>T_2+T_3 ...+T_n, T_2>T_3 ...+T_n ..., T_n-2>T_n-1+T_n, T_n-1>T_n；
Wherein, T_1 is the width of the characteristic pulse of the characteristic pulse transmitting element transmission for the ups system that numbering is 1, and T_2 is volume
Number for 2 ups system characteristic pulse transmitting element send characteristic pulse width, T_n be numbering be N ups system
The width for the characteristic pulse that characteristic pulse transmitting element is sent, T_n-2 are that the characteristic pulse for the ups system that numbering is N-2 is sent
The width for the characteristic pulse that unit is sent, T_n-1 are the spy that the characteristic pulse transmitting element for the ups system that numbering is N-1 is sent
Levy the width of pulse.
4. more ups system power supply synchronization systems according to claim 1, it is characterised in that：The spy of each ups system
The width for the characteristic pulse that sign pulse transmitting element is sent when place ups system is bypass power supply and ups system where this
The width of the characteristic pulse sent when being powered for inversion is different；The numbering of N number of ups system is respectively 1,2 ..., N-2, N-
1st, N, and the width of the characteristic pulse of the characteristic pulse transmitting element transmission of each ups system meets following condition：T_1>T_2+
T_3 ...+T_n+T_n+1+T_n+2 ...+T_n+n, T_2>T_3 ...+T_n+T_n+1+T_n+2 ...+T_n+n ..., T_n+n-2>T_
N+n-1+T_n+n, T_n+n-1>T_n+n；
Wherein, T_1 is that the characteristic pulse transmitting element for the ups system that numbering is 1 is sent out when place ups system is in bypass power supply
Width, the T_n+1 of the characteristic pulse sent are that the characteristic pulse transmitting element for the ups system that numbering is 1 is in place ups system
The width for the characteristic pulse that inversion is sent when powering, T_2 are the characteristic pulse transmitting element for the ups system that numbering is 2 at place
Width, the T_n+2 that ups system is in the characteristic pulse sent during bypass power supply are the characteristic pulse hair for the ups system that numbering is 2
Unit is sent to be in the width of the characteristic pulse sent during inversion power supply in place ups system, T_n is the ups system that numbering is N
Width, the T_n+n for the characteristic pulse that characteristic pulse transmitting element is sent when place ups system is in bypass power supply are that numbering is
The characteristic pulse transmitting element of N ups system is in the width of the characteristic pulse sent during inversion power supply in place ups system,
T_n+n-2 is that the characteristic pulse transmitting element for the ups system that numbering is N-2 is sent when place ups system is in inversion power supply
Characteristic pulse width, T_n+n-1 be numbering be N-1 ups system characteristic pulse transmitting element at the ups system of place
The width of the characteristic pulse sent when inversion is powered.
5. more ups system power supply synchronization systems according to claim 1, it is characterised in that：The synchronizing signal sends single
It is different that member sends synchronizing signal type when ups system is in different powering modes, to synchronous bus；The detecting signal unit
Only in the synchronizing signal type on synchronous bus and the powering mode difference of place ups system, based on ups system where confirming
Synchronizer.
6. a kind of more ups system power supply synchronization methods, power supply synchronization and N number of ups system for realizing N number of ups system lead to
The connection of LBS cables is crossed, the N is the integer more than or equal to 2, it is characterised in that：The LBS cables include synchronous bus and competing
Bus is striven, each ups system performs following steps：
(a) signal of the competition bus of current ups system detection LBS cables and synchronous bus, the signal are included by N number of UPS
The characteristic pulse that one or more of system is sent to competition bus respectively, and the characteristic pulse of each ups system transmission
Width is different；
(b) whether the ups system according to where judging the signal of detection is master synchronizer, if master synchronizer then performs step (c),
Otherwise step (d) is performed；
(c) current ups system sends synchronizing signal to synchronous bus；
(d) synchronizing signal in current ups system tracking synchronous bus；
In the step (b), the current ups system meet this ups system sent into competition bus characteristic pulse condition and
When the width of characteristic pulse in competition bus is less than or equal to the width for the characteristic pulse that current ups system is sent, confirm to work as
Preceding ups system is master synchronizer.
7. more ups system power supply synchronization methods according to claim 6, it is characterised in that：In the step (c), in UPS
When system is in different powering modes, it is different to send synchronizing signal type to synchronous bus；Only synchronous total in the step (b)
During the powering mode difference of synchronizing signal type and place ups system on line, ups system where confirming is master synchronizer.
8. more ups system power supply synchronization methods according to claim 6, it is characterised in that：The power supply mould of the ups system
Formula includes bypass mode or inverter mode；The current ups system is only when bypass mode or inverter mode are powered just to described
Competition bus sends characteristic pulse.
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