CN102593942A - Electric power supply system and fuel cell (FC) backup power system (BPS) thereof - Google Patents
Electric power supply system and fuel cell (FC) backup power system (BPS) thereof Download PDFInfo
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- CN102593942A CN102593942A CN2011100042689A CN201110004268A CN102593942A CN 102593942 A CN102593942 A CN 102593942A CN 2011100042689 A CN2011100042689 A CN 2011100042689A CN 201110004268 A CN201110004268 A CN 201110004268A CN 102593942 A CN102593942 A CN 102593942A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention relates to an electric power supply system and a fuel cell (FC) backup power system (BPS) thereof. The electric power supply system comprises a utility power supply module and the FCBPS. The utility power supply module is used to provide utility power for a load to use. And the FCBPS is used to provide electric energy for the load to use when the utility power is insufficient. The FCBPS comprises a FC system, an electric power adjustment module, a storage battery and a controller. The FC system and the storage battery provide the first electric energy and the second electric energy respectively. The controller distinguishes output power of the FC system into several demand levels, reads load power of the load and adjusts an output proportion of the first electric energy and the second electric energy as a ladder adjusting mode according to the demand levels so as to accord with the load power needed by the load.
Description
Technical field
The present invention relates to a kind of electric power supply system and the electric power system of fuel cell redundant thereof; Particularly relate to a kind of electric energy export ratio, with electric power supply system and the electric power system of fuel cell redundant thereof that the loaded work piece power demand is provided by controller fuel metering battery system and storage battery.
Background technology
(Fuel Cell FC) is the TRT that a kind of utilization is converted into chemical energy electric energy to fuel cell.Compare with traditional generation mode, fuel cell has low pollution, low noise, high-energy-density and higher advantages such as energy conversion efficiency, is to have following prospective clean energy.The applicable scope of fuel cell comprises various fields such as portable electric product, household system, means of transportation, military equipment, space industry and large generating system.
Because the power supply process of fuel cell relates to the transmission of reactant, product and moving of electron stream, so its output voltage receives the very big influence of load device.When load device moment needs huge current flow, must improve the reaction rate of fuel cell at once, so that provide the electric current that needs to give load device.Yet; Because in fuel cell, provide pipeline that fuel carries and the conveyer mechanism that removes reaction product to be difficult to provide load device required big electric current at short notice, therefore be easy to take place because moment power supply capacity not enough and produce the lost efficacy problem of (Power Failure) of power supply.
For fear of because moment the power supply failure phenomenon that causes of power supply capacity deficiency, often arrange in pairs or groups capacitor or secondary cell of the use of fuel cell supplied the load current demand of moment.Yet, because capacitor institute ability energy stored density is very limited, can only supply the pulse current between short-term, the secondary cell of therefore arranging in pairs or groups is the practice that supply on-fixed load device relatively is fit to.
Above-described secondary cell means the battery that can repeat to discharge and recharge, for example, lead-acid battery, Ni-MH battery, nickel-cadmium cell or lithium battery or the like.Yet most secondary cell all has an operating voltage range.When secondary cell charge exceeds upper voltage limit or discharge when surpassing lower voltage limit, all can be to causing severe impairment the useful life of secondary cell, even possibly cause danger such as blast on fire.
Moreover; Utilizing dc power converter (DC/DC Converter) that the output voltage of fuel cell is transformed into secondary cell acceptable voltage range, is the most direct otherwise effective technique at present in order to the voltage that prevents secondary cell greater than upper voltage limit or less than lower voltage limit.Though use dc power converter the output voltage of fuel cell to be changed in the operating voltage range of secondary cell, in the process of power conversion, but can cause power loss.Suppose that when the voltage difference between the upper voltage limit of the output voltage of fuel cell and secondary voltage heals when big, the power loss of power conversion is also just big.Have the dc power converter of high conversion efficiency if use, also can cause the increase of cost.
Fig. 1 is the synoptic diagram of a kind of direct current supplied fuel battery redundant electric power system of existing known techniques.Fig. 2 is the curve chart in a kind of fuel cell system load variations reaction time of existing known techniques.Fig. 3 is the curve chart in a kind of reformer load variations reaction time of existing known techniques.
As shown in Figure 1; It is a kind of fuel cell redundant electric power system 100, and it mainly comprises: fuel cell system (Fuel Cell System) 110, electric governor (Power Condition) 120, storage battery 130, load (Load) 150 and power supply device (Power Supply) 140.Wherein, power supply device 140 is the main power supply sources as load 150, and the then auxiliary redundant electric power system of conduct of fuel cell system 110 and storage battery 130 (Backup Power System, BPS).The effect of this kind fuel cell redundant electric power system 100 mainly is; When power supply device 140 (like civil power) can't continue offered load 150 electric power because of some situation; Fuel cell redundant capable of using electric power system 100 provides electric power, so that the work of load 150 is not interrupted; The employed main redundant electric power system of this system then is a fuel cell system 110.
Yet; Be different from general non-firm power source; When load 150 changes; Fuel cell system 110 needs some reaction time of carrying out electrochemical reaction, and after reaching time rating, just can carry out taking out of certain power to fuel cell system 110 and carry, and so just can avoid the fuel cell system shortening in 110 life-spans.
Please consult shown in Figure 2ly again, it is expression fuel cell load change-reaction time curve chart.In the time must promoting the power output of fuel cell system 110 significantly; As make the fuel cell pack in the fuel cell system 110 export required power immediately thereupon; Will cause fuel cell system 110 irreversible injuries because of the reaction time is not enough; After accumulation a period of time, fuel cell system 110 will permanent damages.Be noted that at this that load amplification reaches and promptly be referred to as to change significantly more than what, then need decide according to the characteristic of system's each several part parameter and fuel cell system 110.
Load amplification is to be assumed to be 25% in Fig. 2, when load 150 at short notice amplification reach 25% when above, just need give the fuel cell pack T in the fuel cell system 110
1The reaction time of second.Yet prerequisite then is, the required Hydrogen Energy of fuel supplying battery pile at any time in fuel cell system 110.Therefore, if this fuel cell system 110 is to use reformer to produce hydrogen, just must also lists the reaction time of reformer in the lump in and consider.
And the load change of reformer-reaction time curve chart is as shown in Figure 3, the change with same 25%, the reaction time (T that reformer is required
2Second) can than fuel cell pack also length (be T
2＞T
1).At this; If the frequency and the amplitude of load 150 changes that this fuel cell redundant electric power system 100 of hypothesis is supplied are bigger; Will make fuel cell pack and reformer in the fuel cell system 110 keep on to rise and carry and fall the action of carrying; Even if give the enough reaction time, for the life-span of reformer, will have influence in a way.
This shows that above-mentioned existing power supply system and the electric power system of fuel cell redundant thereof obviously still have inconvenience and defective, and demand urgently further improving in structure and use.In order to solve the problem of above-mentioned existence; Relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly; But do not see always that for a long time suitable design is developed completion, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of novel electric power supply system and the electric power system of fuel cell redundant thereof, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Summary of the invention
The objective of the invention is to; Overcome the defective that existing power supply system and the electric power system of fuel cell redundant thereof exist; And a kind of novel electric power supply system and fuel cell standby system thereof are provided; Technical problem to be solved is to make electric power supply system use the fuel cell standby system as its non-firm power source; And used battery in this fuel cell standby system, in good time by the discharging and recharging of battery, be very suitable for practicality whereby to supply the not enough electric energy of fuel cell system with charging-discharging controller.
Another object of the present invention is to; Overcome the defective that existing power supply system and the electric power system of fuel cell redundant thereof exist; And a kind of novel electric power supply system and fuel cell standby system thereof are provided; Technical problem to be solved is to make it utilize controller to read the bearing power of load, and it is accurate that the power output of fuel cell system is divided into a plurality of demands position, with the export ratio of staged regulative mode according to fuel cell system in the accurate fuel metering battery standby system of these demand positions and storage battery; Prolong the fuel cell system effect in useful life to reach, thereby be suitable for practicality more.
The object of the invention and solve its technical problem and adopt following technical scheme to realize.According to a kind of electric power supply system that the present invention proposes, it comprises: a mains supply module, and it provides civil power to a load; An and fuel cell redundant electric power system; It is connected with load with the parallel connection of mains supply module by a selector switch again; So that mains supply module or the electric power system of fuel cell redundant and load are electrically connected; Wherein fuel cell redundant electric power system system comprises: a fuel cell system has one first output, in order to one first electric energy to be provided; One electric adjustment module, it has one second input and one second output, and wherein second input is electrically connected at first output; One storage battery, it comprises a charging-discharging controller, and storage battery is parallel to second output, in order to store or to provide one second electric energy; An and controller; The power output setting district of fuel cell system is divided into a plurality of demands position standard; And read a bearing power of this load, accurate according to this a little demands position with the staged regulative mode, the export ratio of regulating first electric energy and second electric energy is to meet the required bearing power of load.
The object of the invention and solve its technical problem and also can adopt following technical measures further to realize.
Aforesaid electric power supply system; The power output of wherein said fuel cell system is that the setting district is divided into n demand position standard; And the m rank export ratio of this first electric energy be defined as this fuel cell system gross output m/n doubly; Wherein n is a positive integer; And m is for more than or equal to 0 and be not more than the integer of n, and wherein when this bearing power was between the m rank export ratio of this first electric energy and m+1 rank export ratio, this controller made this first electric energy export with this m rank export ratio; And the power output that makes this second electric energy equals the difference between the power of this m rank export ratio of this bearing power and this first electric energy; Again when this bearing power equals the gross output of this fuel cell system, this controller makes the gross output of this this fuel cell system of first electric energy output, and to make the power output of this second electric energy be zero.
When aforesaid electric power supply system, wherein said civil power were zero, this selector switch was that this fuel cell redundant electric power system and this load are electrically connected.
Aforesaid electric power supply system, wherein said electric adjustment module comprises an exchange type power transducer and an adjuster, and this adjuster is to export with reception and after changing this first electric energy in order to control this exchange type power transducer.
Aforesaid electric power supply system, wherein said fuel cell system also comprises a reformer.
The object of the invention and solve its technical problem and also adopt following technical scheme to realize.A kind of fuel cell redundant electric power system according to the present invention's proposition; It is to be parallel to a load by a selector switch and a mains supply module; The electric power system of fuel cell redundant comprises: a fuel cell system has one first output, in order to one first electric energy to be provided; One electric adjustment module, it has one second input and one second output, and wherein second input is electrically connected at first output; One storage battery, it comprises a charging-discharging controller, and storage battery is parallel to second output, in order to store or to provide one second electric energy; An and controller; The power output setting district of fuel cell system is divided into a plurality of demands position standard; And read a bearing power of this load, accurate according to this a little demands position with the staged regulative mode, the export ratio of regulating first electric energy and second electric energy is to meet the required bearing power of load.
The object of the invention and solve its technical problem and also can adopt following technical measures further to realize.
The electric power system of aforesaid fuel cell redundant; The power output of wherein said fuel cell system is that the setting district is divided into n demand position standard; And the m rank export ratio of this first electric energy be defined as this fuel cell system gross output m/n doubly; Wherein n is a positive integer; And m is for more than or equal to 0 and be not more than the integer of n, and wherein when this bearing power during between the m rank export ratio of this first electric energy and the power between the export ratio of m+1 rank, this controller makes this first electric energy export with this m rank export ratio; And the power output that makes this second electric energy equals the difference between the power of this m rank export ratio of this bearing power and this first electric energy; Again when this bearing power equals the gross output of this fuel cell system, this controller makes the gross output of this this fuel cell system of first electric energy output, and to make the power output of this second electric energy be zero.
The electric power system of aforesaid fuel cell redundant, wherein said electric adjustment module comprises an exchange type power transducer and an adjuster, and this adjuster is to export with reception and after changing this first electric energy in order to control this exchange type power transducer.
The electric power system of aforesaid fuel cell redundant, wherein said fuel cell system also comprises a reformer.
The present invention compared with prior art has tangible advantage and beneficial effect.By technique scheme, electric power supply system of the present invention and the electric power system of fuel cell redundant thereof have advantage and beneficial effect at least:
One, the present invention is accurate with its output electric energy of staged regulative mode control according to the different demands position by the control fuel cell system; Make fuel cell pack and reformer in the fuel cell system can not do times without number to rise to carry and fall the action of carrying, and then reach and increase the fuel cell system effect in useful life.
Two, because fuel cell system of the present invention only can be in the work of stage of setting, so the running meeting of reformer is more simple, does not also have the problem that the short time goes up and down repeatedly, makes promote to some extent the useful life of reformer.
In sum, the invention relates to a kind of electric power supply system and the electric power system of fuel cell redundant thereof.Wherein electric power supply system comprises: the mains supply module; And fuel cell redundant electric power system.The mains supply module is used to load in order to civil power to be provided, and the electric power system of fuel cell redundant is then in order to provide electric energy to use to load when the civil power power shortage.The electric power system of fuel cell redundant comprises: fuel cell system; The electric adjustment module; Storage battery; And controller.Fuel cell system and storage battery provide first electric energy and second electric energy respectively; And controller is divided into a plurality of demands position standard with the power output of fuel cell system; And read the bearing power of load; Again with the staged regulative mode accurate export ratio of regulating first electric energy and second electric energy in position on demand, to meet the required bearing power of load.The present invention has obvious improvement technically, and has tangible good effect, really is the new design of a novelty, progress, practicality.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention; Understand technological means of the present invention in order can more to know; And can implement according to the content of specification, and for let of the present invention above-mentioned with other purposes, feature and advantage can be more obviously understandable, below special act preferred embodiment; And conjunction with figs., specify as follows.
Description of drawings
Fig. 1 is the synoptic diagram of a kind of direct current supplied fuel battery redundant electric power system of existing known techniques.
Fig. 2 is the curve chart in a kind of fuel cell load variations reaction time of existing known techniques.
Fig. 3 is the curve chart in a kind of reformer load variations reaction time of existing known techniques.
Fig. 4 is the block diagram of a kind of electric power supply system of one embodiment of the invention.
Fig. 5 is the block diagram of a kind of electric power supply system of another embodiment of the present invention.
Fig. 6 is the sketch map of export ratio of bearing power and first electric energy and second electric energy of a kind of fuel cell redundant electric power system of the embodiment of the invention.
Fig. 7 is power output and the graph of a relation in reaction time of first electric energy of a kind of fuel cell system of the embodiment of the invention.
100: fuel cell redundant electric power system 110: fuel cell system
120: electric governor 130: storage battery
140: power supply device 150: load
200: electric power supply system 210: the mains supply module
220: fuel cell redundant electric power system 12: fuel cell system
121: reformer 14: the electric adjustment module
141: exchange type power transducer 142: adjuster
16: storage battery 161: charging-discharging controller
18: controller 230: selector switch
30: load B1, B2, B3, B4, B5: bearing power
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; Below in conjunction with accompanying drawing and preferred embodiment; To electric power supply system and its embodiment of fuel cell redundant electric power system, structure, characteristic and the effect thereof that proposes according to the present invention, specify as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can be known to appear in the following detailed description that cooperates with reference to graphic preferred embodiment.Through the explanation of embodiment, when can being to reach technological means that predetermined purpose takes and effect to obtain one more deeply and concrete understanding to the present invention, yet the appended graphic usefulness that only provides reference and explanation be not to be used for the present invention is limited.
Fig. 4 is the block diagram of a kind of electric power supply system of one embodiment of the invention.Fig. 5 is the block diagram of a kind of electric power supply system of another embodiment of the present invention.Fig. 6 is the sketch map of export ratio of bearing power and first electric energy and second electric energy of a kind of fuel cell redundant electric power system of the embodiment of the invention.Fig. 7 is power output and the graph of a relation in reaction time of first electric energy of a kind of fuel cell system of the embodiment of the invention.
At first see also shown in Figure 4ly, present embodiment is a kind of electric power supply system 200, and it comprises a mains supply module 210 and a fuel cell redundant electric power system 220.
Fuel cell redundant electric power system 220, it comprises a fuel cell system 12, an electric adjustment module 14, a storage battery 16 and a controller 18.
As shown in Figure 4; Fuel cell system 12 has one first output; In order to first electric energy to be provided, and also comprise a reformer 121 (reformer) in the fuel cell system 12, wherein fuel cell system 12 can be alkaline fuel cell (Alkaline Fuel Cell; AFC), phosphoric acid fuel cell (Phosphoric Acid Fuel Cell; PAFC), molten carbonate fuel cell (MoltenCarbonate Fuel Cell, MCFC), SOFC (Solid Oxide FuelCell, SOFC), Proton Exchange Membrane Fuel Cells (Proton Exchange Membrane Fuel Cell; PEMFC) or DMFC (Direct Methanol Fuel Cell, DMFC).
Like Fig. 4 and shown in Figure 5, electric adjustment module 14 has one second input and one second output, and wherein second input is first output that is electrically connected at fuel cell system 12.Electric adjustment module 14 can comprise an exchange type power transducer 141 and an adjuster 142, and adjuster 142 is in order to control 141 receptions of exchange type power transducer and to change first electric energy, to make first electric energy be adjusted into the electric energy of stable output.
As shown in Figure 4, storage battery 16 comprises a charging-discharging controller 161, and storage battery 16 is parallel to second output of electric adjustment module 14, in order to store/to provide one second electric energy.Charging-discharging controller 161 is to discharge in order to control storage battery 16, or is stored in the storage battery 16 in order to the excrescent electric power that fuel cell system 12 is produced.Wherein, storage battery 16 can be the battery that lead-acid battery, Ni-MH battery, nickel-cadmium cell or lithium battery etc. can carry out charge-discharge mechanism.
As shown in Figure 4; Controller 18; It is in order to reading a bearing power of load 30, and it is accurate that the power output setting district of fuel cell system 12 is divided into a plurality of demands position, and accurate with the staged regulative mode according to these demand positions; The power output of second electric energy of first electric energy of fuel metering battery system 12 output and storage battery 16 outputs is to satisfy the required bearing power of load 30 whereby.
It is accurate that controller 18 is that the power output setting district with fuel cell system 12 is divided into n demand position; And first electric energy that fuel cell system 12 is exported is to be divided into the m rank; The m rank export ratio of first electric energy be defined as fuel cell system 12 gross output m/n doubly; Wherein n is a positive integer, and m is for more than or equal to 0 and be not more than the integer of n.In other words, first electric energy only has the output size of m kind, and the reformer 121 of fuel cell system 12 only is operated on this several stages of the fixing output of first electric energy.
Wherein, When bearing power that controller 18 reads load 30 is between the m rank export ratio of first electric energy and m+1 rank export ratio; Controller makes first electric energy export with m rank export ratio; And the power output that makes second electric energy equals the difference between the power of m rank export ratio of this bearing power and first electric energy, and on behalf of second electric energy that utilizes storage battery 16 to be exported, this promptly supply the difference between the power of bearing power and m rank export ratio.When bearing power equaled the gross output of fuel cell system 12,18 of controllers made the gross output of first electric energy output fuel cell system 12, and to make the power output of second electric energy be zero.
Then, as shown in Figure 6, and consult Fig. 4 and Fig. 5 simultaneously.For instance, as gross output (P with fuel cell system 12
Fc) setting district is divided into that 4 demand positions are accurate (to be respectively P
Fc* 25%, P
Fc* 50%, P
Fc* 75%, P
Fc* 100%).The m rank export ratio of first electric energy be defined as fuel cell system 12 gross output m/n doubly, the 0th rank export ratio that is to say first electric energy is that 0/4 times of gross output (promptly 0%), the 1st rank export ratio are that 1/4 times of gross output (is P
Fc* 25%), the 2nd rank export ratio is that 2/4 times of gross output (is P
Fc* 50%), the 3rd rank export ratio is that 3/4 times of gross output (is P
Fc* 75%), the 4th rank export ratio is that 4/4 times of gross output (is P
Fc* 100%).
When load 30 is in initial period, and the required bearing power B1 of load 30 is between 0% to 25% o'clock of the gross output of fuel cell system 12, the electric weight of second electric energy of storage battery 16 can offered load 30 this moments the required electric energy of working.Therefore, at this initial period, controller 18 need only be regulated storage battery 16 supplies second electric energy power to the load 30, and does not need starting fluid battery system 12.In other words, this moment, first electric energy was to be in the 0th rank export ratio, and second electric energy be the power of output loading power and the 0th rank export ratio (is P
Fc* the difference 0%).
When the power of the required bearing power B2 of load 30 between the 1st rank export ratio and the 2nd rank export ratio, it (is P in the power output of the 1st rank export ratio that controller 18 makes the fixing output of first electric energy of fuel cell system 12 outputs again
Fc* 25%), and the electric weight of second electric energy of the control storage battery 16 outputs power of supplying bearing power and the 1st rank export ratio (be P
Fc* the difference 25%).
In like manner, when the power of the required bearing power B3 of load 30 between the 2nd rank export ratio and the 3rd rank export ratio, it (is P in the power output of the 2nd rank export ratio that controller 18 makes the fixing output of first electric energy of fuel cell system 12 outputs
Fc* 50%), and the electric weight of second electric energy of the control storage battery 16 outputs power of supplying bearing power and the 2nd rank export ratio (be P
Fc* the difference 50%).
And when the power of the required bearing power B4 of load 30 between the 3rd rank export ratio (promptly exporting 75%) and the 4th rank export ratio (promptly exporting 100%), it (is P in the power output of the 3rd rank export ratio that controller 18 makes the fixing output of first electric energy of fuel cell system 12 outputs
Fc* 75%), and the electric weight of second electric energy of the control storage battery 16 outputs power of supplying bearing power and the 3rd rank export ratio (be P
Fc* the difference 75%).
At last, equal the gross output of fuel cell system 12 like bearing power B5, first electric energy that 18 of controllers make fuel cell system 12 (is P with the power of the 4th rank export ratio
Fc* output 100%) is with the gross output of exporting fuel cell system 12 fully and then the power demand that meets load 30.In this simultaneously, it is zero that controller 18 makes the power output of second electric energy of storage battery 16 outputs, the electric energy that does not promptly use storage battery 16 to provide fully.
Therefore be compared to the curve working method of Fig. 3 of existing known techniques; As shown in Figure 7; The operation meeting of the reformer 121 in the embodiment that the present invention disclosed is comparatively simple; Do not have the problem that the short time goes up and down repeatedly yet and produce, therefore make to promote the useful life of the reformer 121 in the fuel cell system 12.In Fig. 7, its reaction time T
3Be by the fuel cell pack of fuel cell system 12 and the reaction time T of reformer 121
1And T
2Add up mutually, it mainly is because reformer 121 arrives reaction time T
2Afterwards, the required amounts of hydrogen output of fuel cell pack is arranged, this moment, fuel cell pack just began to get into the reaction time of itself, therefore need give T again
1Second reaction time just can, so total reaction time is T
3In addition; Reformer 121 only can be operated at the working stage that sets; Therefore in the embodiment that the present invention discloses, be to explain, also can set a plurality of working stages according to the demand of system to set 4 working stages, yet not in the limited field of embodiment of the present invention.
Therefore, this is representing that also fuel cell pack also only exports these several kinds of power (P for example
Fc* 25%, P
Fc* 50%, P
Fc* 75% and P
Fc* 100%).If bearing power falls between, difference power then is to be provided by storage battery 16, yet under the situation of long-time supply, the electric weight of storage battery 16 can reduce gradually, can not be supplied to load 30 so that there are enough electric energy.This moment can be by the electric weight of detecting storage battery 16, and is accurate if the electric weight of storage battery 16 is lower than a certain position, and then system is that start-up control device 18 comes the required electric weight of fuel metering battery system 12 output loadings 30, and making has a stable electric weight to provide to load 30.And control the electric weight supply of fuel cell system 12 by stage mode; Can be so that fuel cell pack in the fuel cell system 12 and reformer 121 can not keep on and rise carry and fall the action of carrying yet, and can increase the useful life of fuel cell pack and reformer 121.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction; Though the present invention discloses as above with preferred embodiment; Yet be not in order to limiting the present invention, anyly be familiar with the professional and technical personnel, in not breaking away from technical scheme scope of the present invention; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (9)
1. electric power supply system is characterized in that it comprises:
One mains supply module, it provides civil power to a load; And
One fuel cell redundant electric power system; It is connected with this load with this mains supply module parallel connection by a selector switch again; So that this mains supply module or this fuel cell redundant electric power system and this load are electrically connected, wherein this fuel cell redundant electric power system system comprises:
One fuel cell system has one first output, in order to one first electric energy to be provided;
One electric adjustment module, it has one second input and one second output, and wherein this second input is electrically connected at this first output;
One storage battery, it comprises a charging-discharging controller, and this storage battery is parallel to this second output, in order to store or to provide one second electric energy; And
One controller; The power output setting district of this fuel cell system is divided into a plurality of demands position standard; And read a bearing power of this load; Accurate according to those demand positions with the staged regulative mode, the export ratio of regulating this first electric energy and this second electric energy is to meet this required bearing power of this load.
2. electric power supply system according to claim 1; The power output that it is characterized in that wherein said fuel cell system is that the setting district is divided into n demand position standard; And the m rank export ratio of this first electric energy be defined as this fuel cell system gross output m/n doubly; Wherein n is a positive integer; And m is for more than or equal to 0 and be not more than the integer of n, and wherein when this bearing power was between the m rank export ratio of this first electric energy and m+1 rank export ratio, this controller made this first electric energy export with this m rank export ratio; And the power output that makes this second electric energy equals the difference between the power of this m rank export ratio of this bearing power and this first electric energy; Again when this bearing power equals the gross output of this fuel cell system, this controller makes the gross output of this this fuel cell system of first electric energy output, and to make the power output of this second electric energy be zero.
3. electric power supply system according to claim 1, when it is characterized in that wherein said civil power is zero, this selector switch is that this fuel cell redundant electric power system and this load are electrically connected.
4. electric power supply system according to claim 1; It is characterized in that wherein said electric adjustment module comprises an exchange type power transducer and an adjuster, and this adjuster is to export with reception and after changing this first electric energy in order to control this exchange type power transducer.
5. electric power supply system according to claim 1 is characterized in that wherein said fuel cell system also comprises a reformer.
6. fuel cell redundant electric power system is characterized in that it is to be parallel to a load by a selector switch and a mains supply module, and this fuel cell redundant electric power system comprises:
One fuel cell system has one first output, in order to one first electric energy to be provided;
One electric adjustment module, it has one second input and one second output, and wherein this second input is electrically connected at this first output;
One storage battery, it comprises a charging-discharging controller, and this storage battery is parallel to this second output, in order to store or to provide one second electric energy; And
One controller; The power output setting district of this fuel cell system is divided into a plurality of demands position standard; And read a bearing power of this load; Accurate according to those demand positions with the staged regulative mode, the export ratio of regulating this first electric energy and this second electric energy is to meet this required bearing power of this load.
7. fuel cell redundant according to claim 6 electric power system; The power output that it is characterized in that wherein said fuel cell system is that the setting district is divided into n demand position standard; And the m rank export ratio of this first electric energy be defined as this fuel cell system gross output m/n doubly; Wherein n is a positive integer; And m is for more than or equal to 0 and be not more than the integer of n, and wherein when this bearing power during between the m rank export ratio of this first electric energy and the power between the export ratio of m+1 rank, this controller makes this first electric energy export with this m rank export ratio; And the power output that makes this second electric energy equals the difference between the power of this m rank export ratio of this bearing power and this first electric energy; Again when this bearing power equals the gross output of this fuel cell system, this controller makes the gross output of this this fuel cell system of first electric energy output, and to make the power output of this second electric energy be zero.
8. fuel cell redundant according to claim 6 electric power system; It is characterized in that wherein said electric adjustment module comprises an exchange type power transducer and an adjuster, and this adjuster is to export with reception and after changing this first electric energy in order to control this exchange type power transducer.
9. fuel cell redundant according to claim 6 electric power system is characterized in that wherein said fuel cell system also comprises a reformer.
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