CN103595095B - A kind of Solid Oxide Fuel Cell EMS towards oceanographic buoy - Google Patents
A kind of Solid Oxide Fuel Cell EMS towards oceanographic buoy Download PDFInfo
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- CN103595095B CN103595095B CN201310552132.0A CN201310552132A CN103595095B CN 103595095 B CN103595095 B CN 103595095B CN 201310552132 A CN201310552132 A CN 201310552132A CN 103595095 B CN103595095 B CN 103595095B
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Abstract
The invention discloses a kind of Solid Oxide Fuel Cell EMS towards oceanographic buoy, comprise Solid Oxide Fuel Cell (SOFC) system, DC/DC power conversion modules and energy storage administration module, energy storage administration module comprises storage battery and super capacitor; The direct current that SOFC sends by DC/DC power conversion modules is converted to 14V and 24V direct current, and 24V power supply is SOFC system power itself, and 14V power supply is that oceanographic buoy is powered; Super capacitor and storage battery are received on 14V DC bus, and super capacitor provides Instantaneous peak power for its oceanographic buoy, storage battery for SOFC start or fault time electric energy be provided and be supplemental capacity when oceanographic buoy is sampled.The present invention utilizes storage battery and super capacitor as energy storage device, make the average power state of output stable electric power required for system of SOFC, guarantee that SOFC operates in optimal working point, extend the pile life-span, improve efficiency, and there is self-starting and emergency adaptibility to response, meet the needs of oceanic buoy system long-term stable operation.
Description
Technical field
The invention belongs to Solid Oxide Fuel Cell ocean applied technical field, more precisely, it is that one is equipped by auxiliary energy storage, according to load characteristic conservative control energy flow, guarantee that Solid Oxide Fuel Cell (SOFC) is operated in stable state, extending pile useful life, improve system effectiveness, can be oceanic buoy system Solid Oxide Fuel Cell EMS of powering steady in a long-term.
Background technology
High energy ratio, Large Copacity, long-life, low cost and safe and reliable power supply technique are the key technology of marine settings in the urgent need to development.For oceanographic buoy, its long-term work, at off-lying sea, gathers detection oceanographic data, land receiving station is sent to by telecommunication, in the face of ocean many key elements environment of numerous and complicated, while ensureing himself system stable operation, also to face power supply and supply limited challenge.Traditional storage battery, lithium battery specific energy are lower, have been difficult to working long hours of task under the condition that noenergy is supplemented; Photovoltaic generation, wind power generation climate environmental impact are comparatively large, are difficult to provide stable electric energy.Solid Oxide Fuel Cell (SOFC) is the device by electrochemical reaction, chemical energy being directly converted to electric energy, due to power generation process without the need to mechanical work, not by Carnot cycle restriction, main with high-energy-density gases such as hydrogen for fuel, so its there is quiet noiselessness, the advantage such as generating efficiency is high, energy density is large, environmental friendliness low emission, be the green electricity generation system of 21 century most prospect, meet the requirement of ocean electric power system.Nearest more than ten years, in the world many developed countries, as the U.S., Germany, Japan have dropped into the exploitation that a large amount of funds and manpower are devoted to SOFC system, promoted the development of SOFC technology; The SOFC technology development in recent years of China is very fast, and KW level SOFC technology reaches its maturity.
More research demonstration is had in the world in recent years to the application of Solid Oxide Fuel Cell marine field, if the research institutions such as Norwegian Defense Research Establishment (FFI), experimental study institute of USN (NRL) are to drawing after power technology comparative study feasible at present, in the electric power system of ocean, fuel cell is technical development and the application direction of the strong and potentiality of most.At present, succeed in developing in Germany using fuel cell as the submarine of dynamical system, can continue a journey continuously two weeks under the condition without outside supply.And the substantive independent research of SOFC marine field application at home is still in basic blank state, the research towards the SOFC EMS of marine field be nobody shows any interest in especially.
The power demand of oceanic buoy system has the feature of periodically step fluctuation, one-period be divided into standby, sampling calculate, data send three phases, different phase power fluctuation is large, stand-by power consumption is very little, sampling calculating is taken second place, send and need very large instantaneous power, this with regard to demand power supply unit can quick and stable carry out power tracking.Independently SOFC electric power system dynamic response time is level second, and bearing power is Millisecond Spline smoothing, when load is uprushed, anode fuel consumption aggravates, due to the hysteresis of SOFC system, the fuel consumed cannot be supplemented in time, easily cause the instantaneous deficit of anode fuel, cause anodizing, reduce performance and the life-span of pile, output voltage reduces simultaneously, and the electric energy of output is difficult to meet instantaneous load power demand of uprushing; When load dump, fuel transient surplus can be caused again, cause energy dissipation.In addition, the ocean operation of SOFC electric power system, bad environments, unattended operation, maintenance cost is high, therefore requires that electric power system has self-starting function, fault emergency handling function, remote monitoring function etc.
In order to solve the problem, need to provide a kind of novel Solid Oxide Fuel Cell EMS towards buoy.
Summary of the invention
The invention provides a kind of Solid Oxide Fuel Cell EMS towards oceanographic buoy, this system has the output of stable SOFC electric energy, self-starting and emergent fault management capability, improve the stability of the utilance of fuel, the life-span of pile and system, extend the running time that oceanic buoy system is non-maintaining.
Towards a Solid Oxide Fuel Cell EMS for oceanographic buoy, comprise solid oxide fuel battery system, DC/DC power conversion modules and energy storage administration module; Energy storage administration module comprises storage battery and super capacitor;
Solid oxide fuel battery system, its input serial ports connects the operating state feedback end of oceanic buoy system, electric energy output end connects the first input end of DC/DC power conversion modules, control output end connects the control input end of DC/DC power conversion modules, super capacitor and storage battery, for generating electricity and sending the electric energy of generation to DC/DC power conversion modules, also produce corresponding control command according to the operating state of oceanic buoy system and send DC/DC power conversion modules, super capacitor and storage battery to;
DC/DC power conversion modules, its control input end connects the control output end of solid oxide fuel battery system, first electrical energy inputs connects the output of solid oxide fuel battery system, second electrical energy inputs connects storage battery, 14V output connects oceanic buoy system, 24V output connects the input of solid oxide fuel battery system, for receiving the control command of solid oxide fuel battery system, power conversion output 24V and 14V direct current is carried out to the electric energy that solid oxide fuel battery system produces, 14V direct current exports to oceanic buoy system for its power supply from 14V output, 24V direct current exports to solid oxide fuel battery system for its power supply from 24V output, or the transformation of electrical energy for being exported by storage battery is 24V direct current is that solid oxide fuel battery system is powered,
Super capacitor and storage battery, it is connected between the 14V output of DC/DC power conversion modules and oceanic buoy system, and super capacitor is also connected the output control terminal of solid oxide fuel battery system with the control input end of storage battery; For receiving the control command of solid oxide fuel battery system, when oceanic buoy system is at standby phase, it is super capacitor and charge in batteries that the 14V output of DC/DC power conversion modules exports electric energy; When oceanic buoy system is in sample phase, it is oceanic buoy system supplemental capacity that storage battery exports electric energy; When oceanic buoy system is in data transmission phase, super capacitor provides Instantaneous peak power for its oceanic buoy system; When solid oxide fuel battery system startup or fault restoration, storage battery exports electric energy and obtains 24V direct current by the conversion of DC/DC power conversion modules is that solid oxide fuel battery system is powered.
Technique effect of the present invention is embodied in: present system has the output of stable SOFC electric energy, self-starting and emergent fault management capability, and pass through serial communication between SOFC controller and buoy, be send base station SOFC running status is sent to face, land with buoy, be convenient to monitoring.Super capacitor is connected with 14V DC bus with storage battery, in buoyage standby phase storage power, energy is released at sample phase storage battery, super capacitor is used for slowing down buoy bearing power step transformation to the impact of SOFC system, and provide transient peak power for data transmission phase, make the constant average power required for load of SOFC system output power.Storage battery exports 24V voltage, for providing energy when SOFC system starts by DC/DC power inverter; Storage battery is connected with 14V DC bus, when SOFC fault for oceanic buoy system provides energy.Present system improves the stability of the utilance of fuel, the life-span of pile and system, extends the running time that oceanic buoy system is non-maintaining.
Further, also comprise DC/AC inverter, be converted to 220V alternating current for the 24V direct current exported by the 24V output of DC/DC power conversion modules, for powering at the oceanic buoy system of debugging.Described DC/AC inverter as subsequent use, for debugging oceanic buoy system power.Input switch, by 220V/AC accessory power outlet Mechanical course, reaches the effect of plug and play, makes DC/AC inverter without no-load loss.
Further, described DC/DC converter adopts BOOST boost topology circuit, and output diode reduces power consumption by parallel power pipe.
Further, described DC/AC inverter, adopts two-stage inversion, DC boosting part push-pull topology, adopts SG3525 control chip; Converting Unit adopts pure hardware chip TDS1093 to produce SPWM Waveform Control full bridge inverter.The selection of chip of the present invention, makes DC/AC inverter not need the control chip of programming, simplifies control circuit.
Generally speaking, the present invention is towards in the fuel cell energy management system of oceanographic buoy, with storage battery and super capacitor as energy storage device, make the average power state of output stable electric power required for system of SOFC battery, guarantee that SOFC operates in optimal working point, extend the pile life-span, improve efficiency; And the introducing of storage battery, is that system has self-starting and emergency adaptibility to response, reaches the effect of uninterrupted power supply (UPS), thus meet the needs of oceanic buoy system long-term stable operation.
Accompanying drawing explanation
Fig. 1 is Solid Oxide Fuel Cell Ems Architecture block diagram;
Fig. 2 is oceanographic buoy sampling system power demand figure;
Fig. 3 is the boost topology diagram of DC/DC converter;
Fig. 4 is the topology diagram of DA/AC converter.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In addition, if below in described each execution mode of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
Figure 1 shows that Solid Oxide Fuel Cell Ems Architecture block diagram.Solid Oxide Fuel Cell EMS, comprises solid oxide fuel battery system, DC/DC power conversion modules and energy storage administration module; Energy storage administration module comprises storage battery and super capacitor, and SOFC system comprises SOFC battery and SOFC controller.
The electric energy that SOFC system sends exports 24V and 14V voltage through DC/DC power inverter, and 24V power supply is that the equipment such as controller, valve, blower fan of SOFC system self is powered, and this part power is constant when system is normally run; 14V power supply is that oceanic buoy system is powered, and this part power is the average value P of buoy power demand.14V DC bus is connected to super capacitor and storage battery, buoy is at standby phase, and the unnecessary electric energy P-P1 on 14V DC bus is super capacitor and charge in batteries; In sample phase, the power needed for buoy is greater than the 14V power that DC/DC converter exports, this Partial Power of lacking supplemented by storage battery; Thered is provided by super capacitor at the Instantaneous peak power of data transmission phase.In addition, because the discharge and recharge response of super capacitor is fast, the impact of buoy power step fluctuation on system can be reduced.SOFC system is under startup or emergency situation, SOFC exports without electric energy, power now needed for buoyage is all provided by storage battery, and when the startup of SOFC system or fault restoration, required 24V electric energy is also provided by DC/DC boosting inverter by storage battery.Oceanic buoy system can use 220V/AC power supply when debugging, described system provides DC/AC inverter for subsequent use, and its input connects 24V DC bus by input switch, and input switch is controlled by accessory power outlet, reach the effect of plug and play, make DC/AC inverter without no-load loss.SOFC battery, DC/DC power conversion modules, storage battery, super capacitor are managed as a whole by SOFC electricity administrative unit, reach optimum control effects.The intrasystem controller of SOFC to oceanic buoy system status data by serial ports, is sent to face, land acceptance point by buoy, makes the running status that face, land can monitor SOFC system.
Figure 2 shows that oceanographic buoy sampling system power demand figure, buoyage power demand is in periodicity Spline smoothing.One-period duration is 30min, and wherein [0 ~ T1] period is standby phase, duration 20min, and power consumption is P1, and in this stage, SOFC exports unnecessary energy P1-P accumulators and super capacitor charging under the effect of controller; [T1 ~ T2] period is sampling calculation stages, duration 10min, and power consumption is P2, and storage battery discharges under the effect of controller, for oceanic buoy system supplements this part power of P2-P; In the data sampling stage, buoy landwards sends two secondary data, and each transmitting time continues 2s, and power consumption is P3, and this phase duration is short, and instantaneous power is large, can supplement this part power of P3-P2 with the super capacitor that dynamic property is good.Known, the present invention, according to bearing power change curve, by super capacitor and storage battery peak load shifting, makes SOFC be operated in firm power output state, is conducive to improving system effectiveness, ensures SOFC pile useful life, extend the oceanic buoy system non-maintaining time.
Figure 3 shows that the boost topology diagram of DC/DC converter.Comprise input filter capacitor C1, boost inductance L, power tube Q1, diode VD, power tube Q2, output filter capacitor C2, between the emitter that current transformer is connected on power tube Q1 and ground, UC3842 chip and peripheral circuit composition current mode boost controller.The complementary conducting of power tube Q1 and Q2, output diode VD and power tube Q2 is in parallel, makes the lower power consumption more than 50% of consumption on diode VD.
Figure 4 shows that the topology diagram of DA/AC inverter.Comprise prime DC/DC booster circuit and rear class full bridge inverter.Prime adopts and recommends Boost topology, by the push-pull transformer T of 3, the 3:47 turn ratio, 24V voltage is risen to 360V direct current; Controller is made up of SG3525 chip and peripheral circuit, and producing phase difference is 180o two-way pwm signal driving power pipe Q1, Q2; Q1, Q2 RCD absorbing circuit in parallel, absorber power device closes the due to voltage spikes that section produces instantaneously.Rear class Converting Unit comprises full-bridge circuit, the LC filter of L2, C4, L3 composition, common mode inhibition inductance L 4; Controller is made up of pure hardware chip TDS1093 and peripheral circuit, produces Q3, Q4, Q5, Q6 tetra-power tubes of SPWM drive waveform full-bridge circuit.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1., towards a Solid Oxide Fuel Cell EMS for oceanographic buoy, comprise solid oxide fuel battery system, DC/DC power conversion modules and energy storage administration module; Energy storage administration module comprises storage battery and super capacitor;
Solid oxide fuel battery system, its input serial ports connects the operating state feedback end of oceanic buoy system, electric energy output end connects the first electrical energy inputs of DC/DC power conversion modules, control output end connects the control input end of DC/DC power conversion modules, super capacitor and storage battery, for generating electricity and sending the electric energy of generation to DC/DC power conversion modules, also produce corresponding control command according to the operating state of oceanic buoy system and send DC/DC power conversion modules, super capacitor and storage battery to;
DC/DC power conversion modules, its control input end connects the control output end of solid oxide fuel battery system, first electrical energy inputs connects the electric energy output end of solid oxide fuel battery system, second electrical energy inputs connects storage battery, 14V output connects oceanic buoy system, 24V output connects the input of solid oxide fuel battery system, for receiving the control command of solid oxide fuel battery system, power conversion output 24V and 14V direct current is carried out to the electric energy that solid oxide fuel battery system produces, 14V direct current exports to oceanic buoy system for its power supply from 14V output, 24V direct current exports to solid oxide fuel battery system for its power supply from 24V output, or the transformation of electrical energy for being exported by storage battery is 24V direct current is that solid oxide fuel battery system is powered,
Super capacitor and storage battery, it is connected between the 14V output of DC/DC power conversion modules and oceanic buoy system, super capacitor is also connected the control output end of solid oxide fuel battery system with the control input end of storage battery, for receiving the control command of solid oxide fuel battery system, when oceanic buoy system is at standby phase, it is super capacitor and charge in batteries that the 14V output of DC/DC power conversion modules exports electric energy; When oceanic buoy system is in sample phase, it is oceanic buoy system supplemental capacity that storage battery exports electric energy; When oceanic buoy system is in data transmission phase, super capacitor provides Instantaneous peak power for oceanic buoy system; When solid oxide fuel battery system startup or fault restoration, storage battery exports electric energy and obtains 24V direct current by the conversion of DC/DC power conversion modules is that solid oxide fuel battery system is powered;
Also comprise DC/AC inverter, the input of DC/AC inverter connects the 24V output of DC/DC power conversion modules by input switch, the output of DC/AC inverter connects oceanic buoy system, DC/AC inverter is used for the 24V direct current that the 24V output of DC/DC power conversion modules exports to be converted to 220V alternating current, for powering at the oceanic buoy system of debugging;
Described DC/DC power conversion modules adopts BOOST boost topology circuit;
Described DC/AC inverter adopts two-stage inversion, and DC boosting part adopts push-pull topology circuit; Converting Unit adopts SPWM Waveform Control full bridge inverter.
2. the Solid Oxide Fuel Cell EMS towards oceanographic buoy according to claim 1, is characterized in that, described DC boosting part adopts SG3525 control chip to realize, and described Converting Unit adopts TDS1093 chip to realize.
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| CN104113113A (en) * | 2014-07-01 | 2014-10-22 | 广东省微生物研究所 | Circuit system recycling electric energy from organic matter |
| CN107453467B (en) * | 2017-07-27 | 2020-07-10 | 华中科技大学 | Solid oxide fuel cell hybrid energy management system for ocean buoy |
| CN107947147A (en) * | 2017-12-05 | 2018-04-20 | 上海电机学院 | A kind of fuel cell joint electric power system and energy management method |
| CN110247389A (en) * | 2019-06-26 | 2019-09-17 | 国网浙江省电力有限公司电力科学研究院 | A kind of energy management control system suitable for parallel electric power supply system of fuel cell |
| CN112187044A (en) * | 2019-07-04 | 2021-01-05 | 北京德意新能科技有限公司 | Direct current converter of integrated battery management system |
| CN112994124B (en) * | 2019-12-12 | 2024-07-19 | 中国科学院大连化学物理研究所 | Underwater combined energy power supply method and system |
| CN115833078B (en) * | 2022-12-12 | 2023-07-21 | 中国人民解放军空军预警学院 | Energy optimization method of direct-current micro power grid based on SOFC |
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