CN100352126C - Emergency power surply system using shared battery and input current balance method - Google Patents
Emergency power surply system using shared battery and input current balance method Download PDFInfo
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- CN100352126C CN100352126C CNB2004100321403A CN200410032140A CN100352126C CN 100352126 C CN100352126 C CN 100352126C CN B2004100321403 A CNB2004100321403 A CN B2004100321403A CN 200410032140 A CN200410032140 A CN 200410032140A CN 100352126 C CN100352126 C CN 100352126C
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Abstract
The present invention provides an emergency power supply system for automatically balancing the input current of suppliers of multiple spare power supplies and a method for completing input current balancing in the system. The emergency power supply system of the present invention comprises a power supply input terminal, a plurality of spare power supply suppliers, a shared battery and a power supply output terminal, wherein each spare power supply supplier comprises an input current balancer for collecting the operating state information of the spare power supply suppliers and generating the mean value of the operating state; a difference value can be generated by comparing the mean value and the operating state information of the spare power supply suppliers relevant to the mean value; an output voltage stabilizer of a rectifier can be indicated by the difference value which is amplified in a fixed proportion to generate a rectification control signal which can control the switching operation of the rectifier in a module of the spare power supply suppliers; defects of unbalanced input current existing in a public non-power cut power supply system can be completely eliminated by leading in the input current balancer.
Description
Technical field
The present invention relates to a kind of Emergency Power supply system (emergent powersupply system) of using a shared battery, and more particularly the present invention relates to a kind of use one and share battery and can be the Emergency Power supply system of input current balance, and in this system employed current balance method.
Background technology
Along with developing rapidly and the expansion of the high speed of high-tech industry of information industry, (uninterruptible power supply UPS) has been used as the Emergency Power feeding mechanism of a large amount of electronic installations for uninterruptible power supply provider.Most precision electronic device and equipment need rely on high-quality power supply supply and keep normal operation situation.Now, uninterruptible power supply provider has become under powering-off state, guarantees an optimization approach of best power supply quality.
Although uninterruptible power supply provider can provide plurality of advantages, yet when an old-fashioned uninterruptible power supply provider was sent to maintenance or maintenance, the power supply conducting path of uninterruptible power supply provider can be changed by a by-pass switch (bypass switch).Just at this moment, the load meeting is kept operation by the utility power that is not protected constantly, makes load be subjected to the infringement of power supply network (power grid) easily.In order to address this problem, a kind of parallel redundancy (parallel redundant) non-interrupted power supply system is just proposed, the reliability that makes load be subjected to careful protection and whole power system is improved.
Fig. 1 shows a kind of known 1+1 parallel redundancy non-interrupted power supply system.1+1 parallel redundancy non-interrupted power supply system shown in Figure 1 comprises one first uninterruptible power supply provider UPS-1 and one second uninterruptible power supply provider UPS-2.The first uninterruptible power supply provider UPS-1 and the second uninterruptible power supply provider UPS-2 configuration and setting are for to dispose with identical circuit, and wherein both comprise one filter/circuit- breaker 11,21 all respectively, one rectifier, 12,22, one control switch 13,23, one inverters 14,24, one output circuit circuit breaker, 15,25, one bypass circuit 16,26, one batteries 17,27, an and controller 18,28.The first uninterruptible power supply provider UPS-1 and the second uninterruptible power supply provider UPS-2 are connected to a power input (inlet) 100 so that be coupled to an input ac power, and a power output end (outlet) 101 of a profile electric power network is so that be coupled to a load.The running of each uninterruptible power supply provider shown in Figure 1 is described as follows.Filter/circuit- breaker 11,21 receives an input AC electricity via power input 100 from an input ac power, and the input AC electricity is filtered into a filtering alternating current.Rectifier 12,22 converts the filtering alternating current to the direct current with a predetermined voltage level.Control switch 13,23 self-rectifying devices 12,22 receive direct current and similarly receive a direct current from battery 17,27.Whether the direct current that controller 18,28 can decision self-rectifying devices 12,22 be received is in a predetermined tolerance scope (tolerance).If the direct current that self-rectifying device 12,22 is received falls in the tolerance scope of being scheduled to, so then controller 18,28 meeting control control switchs 13,23 provide from the direct current of rectifier 12,22 and give inverter 14,24.If self-rectifying device 12,22 direct currents that received do not fall in the tolerance scope of being scheduled to, it may be because of power interruptions (power outage) or the cause of power surge (power surge) produces, controller 18,28 can control control switch 13,23 provide from the direct current of battery 17,27 and give inverter 14,24.Inverter 14,24 receives a direct current under the control of controller 18,28, and converts direct current to an alternating current, and alternating current is adjusted to predetermined specification in regular turn.Output circuit circuit breaker 15,25 is used to provide the electrical isolation between load and the uninterruptible power supply provider module.Bypass circuit 16,26 is connected between the power input 100 and power output end 101 of non-interrupted power supply system.Under the situation that breaks down in the inside of a uninterruptible power supply provider module, the power supply supply changes to bypass circuit 16,26 so that make input ac power couple directly to load.In some example, rectifier 12,22 can comprise a battery charger, in order under normal situation, to provide electric supply to come to battery 17,27 chargings, and controller 18,28 can send the operating state information of uninterruptible power supply provider module to a user, it can pass through indicating device or display unit at local side, or sends the user long-range to by communicating with an exterior monitoring device.
Under normal situation, so that the emergency load power supply to be provided, and another is as a standby uninterruptible power supply provider module as a main uninterruptible power supply provider module for one of them of uninterruptible power supply provider module.Under urgent situation, when input ac power fault (outage or power shortage), rectifier 12,22 all can cut out and inverter 14,24 continues to use batteries 17,27 supply electric power to give load.When replying before battery discharges fully from the input AC electricity of input ac power, rectifier 12,22 begins to provide power supply to inverter 14,24 and to battery 17,27 chargings automatically.
Yet in the circuit configurations of Fig. 1, each uninterruptible power supply provider module comprises an independently battery.When the fault of converter of any uninterruptible power supply provider module, the battery that is associated with it just can't be used by other uninterruptible power supply provider module.This will cause invalid that waste that energy uses and space use.In order to eliminate this kind adverse factors, use the non-interrupted power supply system of a shared battery of sharing by the uninterruptible power supply provider module just therefore to propose, so that the greatest benefit of battery to be provided.
Please refer to Fig. 2, the known parallel redundancy non-interrupted power supply system with shared battery is shown among the figure.As shown in Figure 2, the circuit setting of parallel redundancy non-interrupted power supply system is similar to Fig. 1, and difference is that a shared battery 30 is arranged between one first uninterruptible power supply provider UPS-1 and the one second uninterruptible power supply provider UPS-2.The importing of sharing battery 30 can significantly reduce the discharge rate of battery and prolong BACKUP TIME.Moreover it can improve the reliability of non-interrupted power supply system.Because have the combination that parallel redundancy and shared battery are provided with, the parallel redundancy non-interrupted power supply system of Fig. 2 has the benefit of module redundancy, anticipate promptly, but rectifier 12 feed power supplies are given inverter 24.And the parallel redundancy non-interrupted power supply system with shared battery can significantly increase the mean down time of uninterruptible power supply provider module (mean time between failure, MTBF).
Yet known non-interrupted power supply system can bear some shortcoming because of the imbalance between the input current of inner uninterruptible power supply provider module.Please refer to Fig. 1, the first uninterruptible power supply provider module and the second uninterruptible power supply provider module are connected to each other via a switch Q6 in the drawings.Under normal situation, switch Q6 makes other battery to charge respectively via rectifier/ charger 12,22 for opening.Rectifier/ charger 12,22 is not in parallel with a profile electric power network at this moment, therefore can not cause the problem of unbalanced input current in non-interrupted power supply system.Under urgent situation, switch Q6 is for closing and rectifier/ charger 12,22 links together via the profile electric power network, and battery 17,27 begins to provide DC power supply to give load to inverter 14,24 so that produce standby AC power.Because input ac power can't provide the input AC electricity to the uninterruptible power supply provider module, just can not cause the problem of unbalanced input current in non-interrupted power supply system.Yet aforesaid this configuration has the use inefficiency of power, and the negative factor that spends in the expensive manufacturing cost of battery.
See also Fig. 2, under normal situation, control switch 13,23 is all conducting and shared battery 30 and charges via one of them of uninterruptible power supply provider module.Because the input impedance of each uninterruptible power supply provider module differs from one another, the imbalance that the input current of uninterruptible power supply provider module can become.Unbalanced input current can be to rectifier/charger 12,22 cause serious problem, for example, rectifier/ charger 12,22 may be transshipped (overloaded) and the semiconductor subassembly that is used in wherein may have short life cycle because of the overheated cause of meeting.
In view of foregoing problems, just there is a kind of use one of development to share battery and have the trend that the Emergency Power supply system of input current balance function is provided at the reserve source of electrical power supply device intermodule that is associated with it.
Summary of the invention
One first purpose of the present invention is to provide a kind of Emergency Power supply system of using a shared battery, and it provides the input current balance function at the reserve source of electrical power supply device intermodule that is associated with it.
One second purpose of the present invention is to provide a kind of method of finishing input current balance in the Emergency Power supply system of using a shared battery.
First purpose of the present invention is to reach with an Emergency Power supply system, wherein this Emergency Power supply system comprises a power input, be coupled to an input power supply, a plurality of stand-by power supply supply modules, be coupled to this power input to produce a stand-by power supply, one shares battery, be connected to above-mentioned a plurality of stand-by power supply supply module, one power output end, be coupled to above-mentioned a plurality of stand-by power supply supply module to provide this stand-by power supply to a load, and wherein each above-mentioned a plurality of stand-by power supply supply module comprises an input current balance device, in order to collecting an operating state information relevant, and be equal to each other according to the input current that a mean value of operating state information makes a plurality of stand-by power supply supply modules be correlated with above-mentioned a plurality of stand-by power supply supply modules.
One second purpose of the present invention is by providing a kind of input current balance method that is used in the Emergency Power supply system that comprises a plurality of stand-by power supply supply modules to finish.Input current balance method proposed by the invention is to be realized by a plurality of steps, comprise: an operating state information of (a) collecting above-mentioned a plurality of stand-by power supply supply modules, (b) produce a mean value of this operating state information, (c) by the mean value of this operating state information is compared with an operating state information of pairing stand-by power supply supply module, and produce a difference value, (d) give amplification according to a predetermined ratio with this difference value, (e) produce a rectification control signal according to a difference value of amplifying, be controlled at the switch running of a power supply change-over device of its stand-by power supply supply module inside.
The present invention is by importing the input current balance device; the shortcoming that is present in the uneven input current in the known non-interrupted power supply system; and result from different input resistance between wherein the uninterruptible power supply provider; just can eliminate fully, and the rectifier that is arranged in the uninterruptible power supply provider can be subjected to safe protection in order to avoid be subjected to the problem of rectifier overload.
Description of drawings
Fig. 1 shows known parallel redundancy non-interrupted power supply system.
Fig. 2 shows the parallel redundancy non-interrupted power supply system of known use one shared battery.
Fig. 3 shows the parallel redundancy Emergency Power supply system with input current balance function according to an exemplary embodiments of the present invention.
Fig. 4 shows the hot plug Emergency Power supply system with input current balance function according to an exemplary embodiments of the present invention.
Fig. 5 shows the possible layout be used for realizing according to the system of the input current balance method of one first preferred embodiment of the present invention.
Fig. 6 shows the possible layout be used for realizing according to the system of the input current balance method of one second preferred embodiment of the present invention.
Wherein, description of reference numerals is as follows:
100 power inputs, 101 power output ends
11,21 filters/circuit- breaker 12,22 rectifiers
13,23 control switchs, 14,24 inverters
15,25 output circuit circuit breakers, 16,26 bypass circuits
17,27 batteries, 18,28 controllers
30 share battery 41,42 communication interfaces
43,44 input current balance devices, 51 average current input generators
52 adder-subtracters, 53 value amplifiers
54 input currents, 61 Mean Input Power generators
62 adder-subtracters, 63 value amplifiers
64 input powers
The output voltage pressurizer of 121 rectifiers
Embodiment
General configuration according to an Emergency Power supply system of an exemplary embodiments of the present invention is described in Fig. 3 and Fig. 4, wherein Fig. 3 shows the Emergency Power supply system based on the parallel redundancy running, and Fig. 4 shows the Emergency Power supply system based on hot plug running (hot swappable operation).Emergency Power supply system shown in Figure 4 is called hot plug non-interrupted power supply system (hotswappable UPS system), one of them that wherein is arranged at inner uninterruptible power supply provider module given a main power supply unit of a sensitive loads as being used for power supply, yet other uninterruptible power supply provider module is as a redundant power supply.Hot plug non-interrupted power supply system as shown in Figure 4 can allow main uninterruptible power supply provider module to change when non-interrupted power supply system operates.
See also Fig. 3 and Fig. 4, the Emergency Power supply system according to this exemplary embodiments of Fig. 3 or Fig. 4 comprises the internal circuit that has high similarity with the non-interrupted power supply system of Fig. 2.For example, each stand-by power supply supply module of Fig. 3 or Fig. 4 comprises via a power input 100 and receives input AC electricity and the input AC electricity is filtered into the one filter/circuit-breaker 11 of a filtering alternating current from an input ac power, 21, the filtering alternating current is converted to a galvanic rectifier 12 with a predetermined voltage level, 22, self-rectifying device 12,22 receive direct current and similarly share battery 30 receptions one a galvanic control switch 13 from one, 23, decision is by rectifier 12, whether 22 direct currents that received controller 18 in a predetermined tolerance scope, 28, at controller 18, receive a direct current under 28 the control and direct current is converted to the inverter 14 of an alternating current, 24, output circuit circuit breaker 15 that is electrically insulated between load and the reserve source of electrical power supply device module is provided, 25, the power supply supply that will offer load under the situation of reserve source of electrical power supply device module failure switches to a bypass circuit 16 of input ac power from the reserve source of electrical power supply device module, 26, and provide DC power supply to one of inverter 14,24 to share battery 30.In addition, each reserve source of electrical power supply device module in the Emergency Power supply system inside of Fig. 3 and Fig. 4 comprises a communication interface 41,42, it is coupled to controller 18,28 and transmit the operating state information of the reserve source of electrical power supply device module be associated with it, for example, input power supply, input power make the reserve source of electrical power supply device module be exchanged their operating state information each other to other reserve source of electrical power supply device module.Moreover each the reserve source of electrical power supply device module in the Emergency Power supply system inside of Fig. 3 and Fig. 4 comprises an input current balance device 43,44, and it is coupled between communication interface 41,42 and the rectifier 12,22.The major function of input current balance device 43,44 is to make the input current of reserve source of electrical power supply device module be equal to each other according to the mean value by the collected operating state data of communication interface 41,42.Topology configuration and operation principles as for input current balance device 43,44 will describe in detail hereinafter.
See also Fig. 5, explanation is used for finishing the example of possible layout of the system of input current balance method according to one first embodiment according to the present invention.In Fig. 5, input current balance device 43,44 comprise an average current input generator 51, it collects the operating state certificate from a plurality of reserve source of electrical power supply device modules, meaning is the input current of a plurality of reserve source of electrical power supply device modules, and by the input current of a plurality of reserve source of electrical power supply device modules is added up, and the summation of input current calculated an average current input I divided by the number of a plurality of reserve source of electrical power supply device modules
AVGThe average current input I that is calculated
AVGFollow an input current I by an adder-subtracter 52 relative reserve source of electrical power supply device modules that are coupled to average current input generator 51
NCompare, so that produce a difference input current (differential inputcurrent) I
DIFThe difference input current is then amplified according to a predetermined ratio by a value amplifier 53 that is coupled to adder-subtracter 52, and wherein this value amplifier 53 normally (realize by a proportion integration differentiation by PID (proportional-integral and derivative) controller.The difference input current I that is amplified
AMPDIFThen feed back to the output voltage pressurizer 121 of rectifier 12,22.The output voltage pressurizer 121 of rectifier 12,22 is that configuration and setting is with the difference input current I according to amplification
AMPDIFProduce a rectification control signal, and utilize this rectification control signal to control the switching manipulation of rectifier 12,22.Therefore the output dc voltage of rectifier 12,22 is controlled and is made that the input current of a plurality of reserve source of electrical power supply device modules can automatically mutual balance.
See also the explanation of Fig. 6, explanation is used for finishing the example of possible layout of the system of input current balance method according to one second embodiment according to the present invention.The system class that is used for finishing input current balance as shown in Figure 6 is similar to Fig. 5, yet, system as shown in Figure 6 uses a Mean Input Power generator 61, it collects the information of the input power of a plurality of reserve source of electrical power supply device modules, and add up and with the summation of the information of input power number by information, and produce a Mean Input Power P divided by the reserve source of electrical power supply device module with the input power of a plurality of reserve source of electrical power supply device modules
AVGMean Input Power P
AVGFollow input power P by an adder-subtracter 62 relative reserve source of electrical power supply device modules that are coupled to Mean Input Power generator 61
NCompare, so that produce a difference input power (differential input power) P
DIFDifference input power P
DIFThen amplified by a value amplifier 63 that is coupled to adder-subtracter 62 according to a predetermined ratio, wherein this value amplifier 63 normally (realize by a proportion integration differentiation by PID (proportional-integral and derivative) controller.The difference input power P that amplifies
AMPDIFThen feed back to an output voltage pressurizer 121 of rectifier 12.Output voltage pressurizer 121 configuration and settings of rectifier 12 are according to the difference input power P that amplifies
AMPDIFProduce a rectification control signal, with the switch running of control rectifier 12.Therefore the output dc voltage of rectifier 12 just can be controlled, and makes the input current of a plurality of reserve source of electrical power supply device modules reach mutual balance automatically.
Generally speaking, the invention provides a kind of Emergency Power supply system of sharing battery of using, it can reach balance automatically with the input current of a plurality of reserve source of electrical power supply device modules of inside, and a kind of method of finishing this technology is provided.Be used for the framework of input current of balance Emergency Power supply system and be based on an input current balance device in that this proposes, it can collect the input current or the input power of a plurality of reserve source of electrical power supply device modules, with input current or input power averaged and produce average current input or Mean Input Power, the input current of the reserve source of electrical power supply device that is associated with it by estimation average current input or Mean Input Power or the difference of input power, produce differential input current or differential input power, and make the output voltage pressurizer of a rectifier produce the ON/OFF running that a rectification control signal is controlled rectifier.By importing the input current balance device; the shortcoming that is present in the uneven input current in the known non-interrupted power supply system; and result from different input resistance between wherein the uninterruptible power supply provider; just can eliminate fully, and the rectifier that is arranged in the uninterruptible power supply provider can be subjected to safe protection in order to avoid be subjected to the problem of rectifier overload.
The present invention has been described in detail by the above embodiments and can have been undertaken modifying as all by those of ordinary skill in the art, but the scope that neither disengaging claim is protected.
Claims (10)
1. Emergency Power supply system, it comprises:
One power input is coupled to an input power supply;
A plurality of reserve source of electrical power supply device modules are coupled to this power input, in order to produce a stand-by power supply;
One shares battery, is connected to above-mentioned a plurality of reserve source of electrical power supply device module; And
One power output end is coupled to above-mentioned a plurality of reserve source of electrical power supply device module, in order to provide this stand-by power supply to a load;
Wherein each reserve source of electrical power supply device module comprises an input current balance device, in order to collecting an operating state information relevant, and make the input current of above-mentioned a plurality of reserve source of electrical power supply device modules be equal to each other according to a mean value of this operating state information with above-mentioned a plurality of reserve source of electrical power supply device modules.
2. Emergency Power supply system as claimed in claim 1 is characterized in that each above-mentioned a plurality of reserve source of electrical power supply device module comprises:
One controller is in order to monitor the operating state information of above-mentioned a plurality of reserve source of electrical power supply device modules; And
One communication interface is in order to transmit the operating state information of above-mentioned a plurality of reserve source of electrical power supply device modules.
3. Emergency Power supply system as claimed in claim 2 is characterized in that this input current balance device comprises:
One average current input generator, it receives information about the input current of above-mentioned a plurality of reserve source of electrical power supply device modules from this communication interface, and by producing an average current input divided by the number of above-mentioned a plurality of reserve source of electrical power supply device modules about the summation of the information of this input current;
One adder-subtracter is coupled to this average current input generator, in order to this average current input is compared with the input current of pairing reserve source of electrical power supply device module, and produces a difference input current according to comparative result; And
One value amplifier is coupled to this adder-subtracter, in order to amplify this difference input current according to a predetermined ratio.
4. Emergency Power supply system as claimed in claim 3, it is characterized in that this value amplifier is a proportional plus integral plus derivative controller, each of above-mentioned a plurality of reserve source of electrical power supply device modules all comprises a rectifier, in order to an AC power is converted to direct voltage with a predetermined voltage level, and wherein this rectifier comprises an output voltage pressurizer, receive one in order to this value amplifier certainly and amplify difference input current, and correspondingly produce the switch running that a rectification control signal is controlled this rectifier.
5. Emergency Power supply system as claimed in claim 2 is characterized in that this input current balance device comprises:
One Mean Input Power generator, it receives information about the input power of above-mentioned a plurality of reserve source of electrical power supply device modules from this communication interface, and by producing a Mean Input Power divided by the number of above-mentioned a plurality of reserve source of electrical power supply device modules about the summation of the information of this input power;
One adder-subtracter is coupled to this Mean Input Power generator, in order to this Mean Input Power is compared with the input power of pairing reserve source of electrical power supply device module, and produces a difference input power according to comparative result; And
One value amplifier is coupled to this adder-subtracter, in order to amplify this difference input power according to a predetermined ratio.
6. Emergency Power supply system as claimed in claim 5, it is characterized in that this value amplifier is a proportional plus integral plus derivative controller, each of above-mentioned a plurality of reserve source of electrical power supply device modules all comprises a rectifier, in order to an AC power is converted to direct voltage with a predetermined voltage level, and wherein this rectifier comprises an output voltage pressurizer, receive one in order to this value amplifier certainly and amplify difference input power, and correspondingly produce the switch running that a rectification control signal is controlled this rectifier.
7. Emergency Power supply system as claimed in claim 1 is characterized in that above-mentioned a plurality of reserve source of electrical power supply device module to be configuration and setting according to a redundant configuration in parallel or a hot plug disposes operating.
8. the method for the input current of a plurality of reserve source of electrical power supply device modules in the balance one Emergency Power supply system, it comprises:
Collect an operating state information of above-mentioned a plurality of reserve source of electrical power supply device modules and give each reserve source of electrical power supply device module;
Produce a mean value of the summation of this operating state information;
By a mean value of the summation of operating state information is compared with an operating state information of pairing reserve source of electrical power supply device module, and produce a difference value;
According to a predetermined ratio this difference value is amplified; And
Produce the switch running that a rectification control signal is controlled at the power supply change-over device in the relative reserve source of electrical power supply device module according to a difference value of amplifying.
9. the method for balance input current as claimed in claim 8 is characterized in that this operating state information comprises the input current of above-mentioned a plurality of reserve source of electrical power supply device modules or the information of input power.
10. the method for balance input current as claimed in claim 8, it is characterized in that the step that produces a difference value is realized by an adder-subtracter, and the step of this difference value being amplified according to a predetermined ratio is to be realized by a proportional plus integral plus derivative controller.
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| CNB2004100321403A CN100352126C (en) | 2004-04-01 | 2004-04-01 | Emergency power surply system using shared battery and input current balance method |
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| CN101442831B (en) * | 2007-11-23 | 2011-06-22 | 联想(北京)有限公司 | Mobile equipment capable of using battery mutually |
| US9013073B2 (en) | 2010-04-22 | 2015-04-21 | Hewlett-Packard Development Company, L.P. | System and method for balancing input current with parallel power supplies |
| CN102723772A (en) * | 2011-03-31 | 2012-10-10 | 重庆市星海电子有限公司 | Mobile vehicle online special UPS dual redundancy parallel system |
| CN103904918B (en) * | 2014-03-05 | 2017-02-08 | 象山元明光电科技有限公司 | Multi-channel self-adaptive power balance output 50 V direct current power source and power control method thereof |
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| CN1423389A (en) * | 2001-12-07 | 2003-06-11 | 广东志成冠军电子实业有限公司 | Bus-controlled parallel uninterrupted power source (UPS) system |
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| CN1564420A (en) | 2005-01-12 |
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