CN110758708A - Ship fuel cell hybrid propulsion system and energy control method - Google Patents
Ship fuel cell hybrid propulsion system and energy control method Download PDFInfo
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- CN110758708A CN110758708A CN201910973780.0A CN201910973780A CN110758708A CN 110758708 A CN110758708 A CN 110758708A CN 201910973780 A CN201910973780 A CN 201910973780A CN 110758708 A CN110758708 A CN 110758708A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/20—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H2021/003—Use of propulsion power plant or units on vessels the power plant using fuel cells for energy supply or accumulation, e.g. for buffering photovoltaic energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/20—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units
- B63H2021/202—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units of hybrid electric type
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
Abstract
The invention discloses a ship fuel cell hybrid propulsion system and an energy control method. In the sailing process of the ship, when the required power of the ship is in the optimal power interval of the fuel cell, the fuel cell supplies power to the propulsion system module; when the power required by the ship is larger than the optimal power interval of the fuel cell, the fuel cell and the storage battery pack jointly supply power to the propulsion system module; when the fuel cell is in failure or the raw materials are insufficient, the storage battery pack supplies power for the ship in an emergency mode. The invention can realize no pollution and zero emission in the true sense and optimize the energy utilization.
Description
Technical Field
The invention relates to the technical field of ship power systems, in particular to a ship fuel cell hybrid propulsion system and an energy control method.
Background
Ships are one of the current vehicles, particularly in the freight industry, and are widely used in marine transportation because they can carry a large amount of cargo. However, under the current situation of advocating intelligent ships and green oceans, the large number of traditional diesel engines used for driving ships can greatly affect the natural environment, so that the development of hybrid ships is of great significance, and energy conservation and environmental protection are the prerequisites of ship power design.
For example, chinese patent document CN102120488A discloses a "hybrid ship electric propulsion system and an implementation method", and a hybrid ship electric propulsion system and an implementation method using a power battery as a main power source of the electric propulsion system and a diesel-electric set as an auxiliary power source. When the ship is berthed and stopped, the power battery is charged by shore power, and the electric energy is stored; when in normal navigation, the power battery supplies power to the electric propulsion system; when the stored energy of the power battery is used up or fails during the sailing, the auxiliary diesel-electric set is automatically started to put into operation, power is continuously supplied to the electric propulsion system, and the sailing of the ship is maintained; in an emergency state, the power battery and the diesel-electric machine set are combined to supply power to the electric propulsion system so as to ensure the navigation safety of the ship. The propulsion system in the above patent literature adopts the diesel-electric set to supply power for the propulsion system when the stored energy of the power battery is used up or breaks down, however, the diesel-electric set can generate pollution when running, and the whole electric propulsion system can not realize pollution-free and zero emission in the true sense.
Disclosure of Invention
The invention mainly solves the technical problems that the existing ship hybrid propulsion system can not realize pollution-free and zero emission in a real sense and the energy utilization can not reach the optimization: the fuel cell and the storage battery pack are used as a mixed power source to supply power to the propulsion system, so that pollution-free and zero emission in the real sense is realized, and the energy supply of the fuel cell and the storage battery pack is reasonably distributed by an energy management module in the ship according to the sailing working condition of the ship, so that the energy utilization is optimized.
The technical problem of the invention is mainly solved by the following technical scheme: the ship hybrid propulsion system comprises a propulsion system module, an energy management module and a power source module, wherein the power source module comprises a fuel cell and a storage battery pack, the energy management module comprises a fuel cell management unit, a storage battery pack management unit, a processing unit and a monitoring unit for monitoring the power source module, and the propulsion system module comprises a control unit and a driving mechanism; the output end of the fuel cell and the output end of the storage battery pack are connected on a direct current bus in parallel, the output end of the direct current bus is connected with the input end of the control unit, the output end of the control unit is connected with the input end of the driving mechanism, the feedback output end of the propulsion system module and the output end of the monitoring unit are connected with the input end of the processing unit, and the output end of the processing unit is connected with the input end of the fuel cell management unit and the input end of the storage battery pack management unit.
The propulsion system module feeds back and outputs the sailing working condition of the ship to the processing unit in the energy management module, the processing unit calculates the load power required by sailing according to the sailing working condition of the ship, the monitoring module transmits the related data of the fuel cell and the storage battery (the quantity of the raw materials of the fuel cell, the temperature of the cell, the utilization rate of fuel and the like) to the processing unit in the energy management module, the processing unit calculates the optimal power of the fuel cell, the optimal efficiency of the fuel cell and the SOC value of the storage battery according to the related data of the fuel cell and the storage battery, and comparing and judging the data, selecting a proper working mode, sending the selected working mode to the fuel cell management unit and the storage battery pack management unit, and controlling and starting the corresponding power source to supply power to the propulsion system by the fuel cell management unit and the storage battery pack management unit according to the working mode. The electric-electric hybrid propulsion system adopting the fuel cell and the storage battery pack can realize pollution-free and zero emission in the true sense, the energy control process is closed-loop control, and the energy supply of the fuel cell and the storage battery pack can be reasonably distributed in real time according to the ship navigation working condition, so that the energy utilization is optimized.
Preferably, the ship hydrogen fuel cell hybrid propulsion system further comprises a unidirectional DC-DC converter, the output end of the fuel cell is connected with the input end of the unidirectional DC-DC converter, and the output end of the unidirectional DC-DC converter and the output end of the storage battery pack are connected in parallel on a direct current bus.
The output voltage of the fuel cell is subjected to voltage transformation and stabilization through the unidirectional DC-DC converter and then is matched with the voltage level of the direct-current bus, the power output of the fuel cell is not coupled with the voltage of the direct-current bus, the DC-DC converter is a unidirectional converter, the output of the unidirectional converter is used as a controlled object, the main amount is the output power of the fuel cell, and the fluctuation of the output power of the fuel cell within an allowable small range can be controlled.
Preferably, the ship hydrogen fuel cell hybrid propulsion system further comprises a bidirectional DC-DC converter, and the storage battery pack is connected in parallel with the fuel cell on a direct current bus through the bidirectional DC-DC converter.
The fuel cell is connected with the direct current bus, and the storage battery pack is connected with the direct current bus after passing through the bidirectional DC-DC converter, so that the volume and the weight of the auxiliary storage battery pack can be reduced, the charge and discharge of the storage battery pack can be bidirectionally controlled, and parameter optimization is facilitated.
Preferably, the fuel cell is a proton exchange membrane fuel cell.
The proton exchange membrane fuel cell has high starting speed and is particularly suitable for being used as a power cell; the energy conversion efficiency is high, and chemical energy is directly converted into electric energy through the hydrogen-oxygen combination effect; zero emission can be realized, the only emission is pure water (and water vapor), and no pollutant is discharged; and hydrogen is a renewable green energy source.
Preferably, the charging terminal of the storage battery pack is connected with the fuel cell.
When the SOC value of the storage battery pack is lower than a set value, the fuel cell charges the storage battery pack, so that the electric quantity of the storage battery pack is always kept in a safe working range, the service life of the storage battery pack is prolonged, and higher electric quantity is maintained as far as possible to provide peak power for working conditions such as ship starting, acceleration and the like.
The invention discloses an energy control method of a ship fuel cell hybrid propulsion system, which comprises the following steps:
s1, the propulsion system module feeds back the working condition of the ship in the sailing process to the processing unit, and the monitoring module transmits the monitored data of the fuel cell and the storage battery pack to the processing unit;
s2, the processing unit calculates the load power P according to the collected working conditionloadCalculating the optimum power P of the fuel cell based on the monitored dataFCFuel cell optimum efficiency ηFCAnd a battery pack SOC value;
s3, the processing unit judges whether the fuel cell has a fault or insufficient raw materials according to the monitored data of the fuel cell, if the fuel cell has the fault or insufficient raw materials, the emergency propulsion working mode of the storage battery pack is selected, otherwise, the step S4 is carried out;
s4, judging 0 < Pload＜PFCAnd ηFCIf not, selecting a fuel cell and storage battery pack parallel propulsion working mode, otherwise, performing step S5;
and S5, judging that the SOC is more than or equal to 40% and less than or equal to 90%, if so, selecting a pure fuel cell propulsion working mode B, and otherwise, selecting a pure fuel cell propulsion working mode A.
Pure fuel cell propulsion a mode of operation: when the required power of the ship is in the optimal power range of the fuel cell, the fuel cell supplies power to the propulsion system module; meanwhile, the SOC value of the storage battery pack is lower than a set value, and the fuel cell charges the storage battery pack; pure fuel cell propulsion B mode of operation: when the required power of the ship is in the optimal power range of the fuel cell, the fuel cell supplies power to the propulsion system module; meanwhile, the SOC value of the storage battery pack is not lower than a set value, and the fuel cell does not need to charge the storage battery pack; fuel cell and battery pack parallel propulsion operating mode: when the ship is in working conditions of starting, accelerating, turning and the like, namely the required power is greater than the optimal power interval of the fuel cell, the fuel cell is kept in the optimal power interval, the insufficient power is provided by the storage battery pack, and the fuel cell and the storage battery pack jointly supply power to the propulsion system module; the emergency propulsion working mode of the storage battery pack is as follows: when the fuel cell is in failure or the raw materials are insufficient, the storage battery pack is used as an emergency power supply to supply power for the ship in an emergency mode. The energy supply of the fuel cell and the storage battery pack is reasonably distributed according to the sailing working condition of the ship, so that the energy utilization is optimized, the fuel cell is kept to work in a working area stably all the time, the working point is prevented from deviating greatly, and the output efficiency of the fuel cell is optimal in the working area; the residual electric quantity of the storage battery pack is always kept in a safe working range, and the service life of the storage battery pack is prolonged; when the fuel cell breaks down or the raw materials are exhausted, the storage battery pack can supply power to the propulsion system continuously, and safe operation of the ship is guaranteed.
The invention has the beneficial effects that: 1) the power source of the propulsion system adopts the electricity and electricity mixing of a fuel cell and a storage battery pack, so that pollution-free and zero emission are realized in the true sense; 2) the energy supply of the fuel cell and the storage battery pack is reasonably distributed according to the sailing working condition of the ship, so that the energy utilization is optimized, and the economy is saved.
Drawings
Fig. 1 is a schematic diagram of a DC-DC converter-less direct parallel configuration of the system of the present invention.
Fig. 2 is a schematic diagram of a direct parallel configuration of the system of the present invention with DC-DC converters.
Fig. 3 is a schematic diagram of an indirect parallel configuration of the system of the present invention.
Fig. 4 is a schematic diagram of a feedback circuit of the system of the present invention.
Fig. 5 is a block flow diagram of the method of the present invention.
In the figure 1, a power source module, 11, a fuel cell, 12, a storage battery, 2, an energy management module, 21, a fuel cell management unit, 22, a storage battery management unit, 23, a processing unit, 24, a monitoring unit, 3, a propulsion system module, 31, a control unit, 32, an engine, 33, a propeller, 4, a bidirectional DC-DC converter, 5, a unidirectional DC-DC converter.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example 1: a ship fuel cell hybrid propulsion system of the present embodiment, as shown in fig. 1, includes a propulsion system module 3, an energy management module 2 and a power source module 1, where the power source module includes a fuel cell 11 and a storage battery 12, the energy management module includes a fuel cell management unit 21, a storage battery management unit 22, a processing unit 23 and a monitoring unit 24, the propulsion system module includes a control unit 31 and a driving mechanism, and the driving mechanism includes an engine 32 and a propeller 33; the fuel cell output end and the storage battery pack output end are connected to a direct current bus in parallel, the direct current bus output end is connected with the control unit input end, the control unit output end is connected with the engine input end, the engine output end is connected with the propeller, the propulsion system module feedback output end and the monitoring unit output end are connected with the processing unit input end, the processing unit output end is connected with the fuel cell management unit input end and the storage battery pack management unit input end, the storage battery charging end is connected with the fuel cell, the monitoring unit input end is connected with the fuel cell and the storage battery pack, and the monitoring unit is used for monitoring the fuel cell and the storage battery.
In this embodiment, the fuel cell is a Proton Exchange Membrane Fuel Cell (PEMFC), which uses hydrogen and oxygen as raw materials, and the only emissions are pure water (and water vapor), so that no pollutant is emitted, and zero emission is achieved; the propulsion system module feeds the sailing conditions back to the processing unit of the energy management module through a feedback circuit, as shown in fig. 4, and comprises a power supply USResistance RSResistance RlResistance RfResistance RLAnd amplifying circuit integrated chip U1Power supply USPositive electrode and resistor RSIs connected to a resistor RSAnother end of (1) and chip U1Pin 1 of, chip U1Pin 3 and resistor RlAnd a resistor RfIs connected to chip U1Pin 2 and resistor RLAnd a resistor RfIs connected to the other end of the chip U1Pin 4, resistor RLAnother terminal of (1), a resistor RlAnd the other end of (1) and a power supply USThe cathodes of the two are all grounded.
The propulsion system mainly has two connection structures: a direct parallel structure and an indirect parallel structure, wherein the direct parallel structure is divided into a direct parallel structure without a DC-DC converter, and a direct parallel structure without a DC-DC converter is shown in figure 1.
The direct parallel structure has a DC-DC converter as shown in figure 2, compared with the direct parallel structure without a DC-DC converter, a DC-DC converter is added, the DC-DC converter is a bidirectional DC-DC converter 4, a storage battery pack is connected with the output end of a fuel cell in parallel through the bidirectional DC-DC converter on a direct current bus, the output end of the direct current bus is connected with the input end of the control unit, the output end of the control unit is connected with the input end of an engine, the output end of the engine is connected with a propeller, the feedback output end of a propulsion system module and the output end of a monitoring unit are connected with the input end of a processing unit, the output end of the processing unit is connected with the input end of a fuel cell management unit and the input end of the storage battery pack management unit, the charging, the monitoring unit is used for monitoring the fuel cell and the storage battery pack in real time.
The fuel cell is connected with the direct current bus, and the storage battery pack is connected with the direct current bus after passing through the bidirectional DC-DC converter, so that the volume and the weight of the auxiliary storage battery pack can be reduced, the charge and discharge of the storage battery pack can be bidirectionally controlled, and parameter optimization is facilitated.
The indirect parallel structure is shown in fig. 3, wherein the DC-DC converter is a unidirectional DC-DC converter 5, the output end of the fuel cell is connected with the input end of the unidirectional DC-DC converter, the output end of the unidirectional DC-DC converter and the output end of the storage battery are connected in parallel on a direct current bus, the output end of the direct current bus is connected with the input end of the control unit, the output end of the control unit is connected with the input end of the engine, the output end of the engine is connected with the propeller, the feedback output end of the propulsion system module and the output end of the monitoring unit are connected with the input end of the fuel cell management unit and the input end of the storage battery management unit, the input end of the monitoring unit is connected with the fuel cell and the storage battery, and the.
The output voltage of the fuel cell is subjected to voltage transformation and stabilization through the unidirectional DC-DC converter and then is matched with the voltage level of the direct-current bus, the power output of the fuel cell is not coupled with the voltage of the direct-current bus, the DC-DC converter is a unidirectional converter, the output of the unidirectional converter is used as a controlled object, the main amount is the output power of the fuel cell, and the fluctuation of the output power of the fuel cell within an allowable small range can be controlled.
The propulsion system module feeds sailing conditions back to a processing unit of the energy management module through a feedback circuit, the propulsion system module feeds the sailing conditions of the ship back to the processing unit in the energy management module, the processing unit calculates load power required by sailing according to the sailing conditions of the ship, the monitoring module transmits related data (the quantity of raw materials of the fuel cell, the temperature of the cell, the utilization rate of fuel and the like) of the fuel cell and the storage battery to the processing unit in the energy management module, the processing unit calculates the optimal power of the fuel cell, the optimal efficiency of the fuel cell and the SOC value of the storage battery according to the related data of the fuel cell and the storage battery, and comparing and judging the data, selecting a proper working mode, and sending the selected working mode to the fuel cell management unit and the storage battery pack management unit. When the fuel cell has a fault or the raw materials are insufficient, selecting a storage battery pack emergency propulsion working mode, controlling the storage battery pack to output power required by ship navigation by a storage battery pack management unit, and enabling the fuel cell management unit not to work; when the fuel cell is normal, the power required by ship navigation is in the optimal power interval of the fuel cell and the SOC value of the storage battery pack is lower than a set value, a pure fuel cell propulsion working mode A is selected, the fuel cell management unit controls the fuel cell to output the power required by ship navigation and charge the storage battery pack, and the storage battery pack management unit does not work; when the fuel cell is normal, the power required by ship navigation is in the optimal power interval of the fuel cell and the SOC value of the storage battery pack is not lower than a set value, a pure fuel cell propulsion working mode B is selected, the fuel cell management unit controls the fuel cell to output the power required by ship navigation, and the storage battery pack management unit does not work; when the fuel cell is normal and the power required by ship navigation is larger than the optimal power area of the fuel cell, selecting a fuel cell and storage battery pack to be connected in parallel to propel the ship to work, controlling the output power of the fuel cell to be kept in the optimal power area by the fuel cell management unit, and controlling the storage battery pack to output the rest power required by ship navigation by the storage battery pack management unit.
The energy control method of the ship fuel cell hybrid propulsion system of the embodiment, as shown in fig. 5, includes the following steps:
s1, the propulsion system module feeds back the working condition of the ship in the sailing process to the processing unit, and the monitoring module transmits the monitored data of the fuel cell and the storage battery pack to the processing unit;
s2, the processing unit calculates the load power P according to the collected working conditionloadCalculating the optimum power P of the fuel cell based on the monitored dataFCFuel cell optimum efficiency ηFCAnd a battery pack SOC value;
s3, the processing unit judges whether the fuel cell has a fault or insufficient raw materials according to the monitored data of the fuel cell, if the fuel cell has the fault or insufficient raw materials, the emergency propulsion working mode of the storage battery pack is selected, otherwise, the step S4 is carried out;
s4, judging 0 < Pload＜PFCAnd ηFCIf not, selecting a fuel cell and storage battery pack parallel propulsion working mode, otherwise, performing step S5;
and S5, judging that the SOC is more than or equal to 40% and less than or equal to 90%, if so, selecting a pure fuel cell propulsion working mode B, and otherwise, selecting a pure fuel cell propulsion working mode A.
The propulsion system module feeds sailing conditions back to a processing unit of the energy management module, the processing unit calculates load power required by sailing according to the sailing conditions of ships, the monitoring module transmits related data (the quantity of raw materials of fuel cells, the cell temperature, the fuel utilization rate and the like) of the fuel cells and the storage battery pack to the processing unit of the energy management module, the processing unit calculates the optimal power of the fuel cells, the optimal efficiency of the fuel cells and the SOC value of the storage battery pack according to the related data of the fuel cells and the storage battery pack, compares and distinguishes the data, then selects a working mode, distinguishes the fuel cells, selects an emergency propulsion working mode of the storage battery pack if the fuel cells are in fault or lack of raw materials, and the storage battery pack is used as an emergency power source and is used as aThe ship carries out emergency power supply. If the fuel cell has no fault and the raw materials are sufficient, the sailing working condition of the ship and the SOC value of the storage battery pack are judged, and if the power required by sailing of the ship is in the optimal power interval of the fuel cell, namely 0 & lt Pload＜PFCFuel cell efficiency ηFCThe SOC value of the storage battery pack is more than or equal to 60 percent and is lower than the set value of 40 percent, a pure fuel cell propulsion working mode A is selected, and the fuel cell supplies power to the propulsion system module and charges the storage battery pack at the same time; if the power required by ship navigation is in the optimal power interval of fuel cell, 0 & lt Pload＜PFCFuel cell efficiency ηFCAnd when the SOC value of the storage battery pack is not less than a set value (SOC is not less than 40% and not more than 90%), selecting a pure fuel cell propulsion working mode B, and supplying power to the propulsion system module by the fuel cell. If the ship is in the working conditions of starting, accelerating, turning and the like (namely the required power is larger than the optimal power interval of the fuel cell, P)load＞PFC) Or fuel cell efficiency ηFCIf the power is less than 60%, a parallel propulsion working mode of the fuel cell and the storage battery pack is selected, the output of the fuel cell is kept in an optimal power interval, insufficient power is provided by the storage battery pack, and the fuel cell and the storage battery pack jointly supply power for the propulsion system module.
Claims (6)
1. A ship fuel cell hybrid propulsion system is characterized by comprising a propulsion system module, an energy management module and a power source module, wherein the power source module comprises a fuel cell and a storage battery pack, the energy management module comprises a fuel cell management unit, a storage battery pack management unit, a processing unit and a monitoring unit for monitoring the power source module, and the propulsion system module comprises a control unit and a driving mechanism; the output end of the fuel cell and the output end of the storage battery pack are connected on a direct current bus in parallel, the output end of the direct current bus is connected with the input end of the control unit, the output end of the control unit is connected with the input end of the driving mechanism, the feedback output end of the propulsion system module and the output end of the monitoring unit are connected with the input end of the processing unit, and the output end of the processing unit is connected with the input end of the fuel cell management unit and the input end of the storage battery pack management unit.
2. The marine fuel cell hybrid propulsion system of claim 1, further comprising a unidirectional DC-DC converter, the fuel cell output being connected to the unidirectional DC-DC converter input, the unidirectional DC-DC converter output being connected in parallel with the battery pack output on a DC bus.
3. The marine fuel cell hybrid propulsion system of claim 1, further comprising a bidirectional DC-DC converter, wherein the battery pack is connected in parallel with the fuel cells on a DC bus via the bidirectional DC-DC converter.
4. The marine fuel cell hybrid propulsion system of claim 1 or 2, wherein the battery pack charging terminal is connected to a fuel cell.
5. The marine fuel cell hybrid propulsion system of claim 1, characterized in that the fuel cell is a proton exchange membrane fuel cell.
6. A method for controlling energy of a ship fuel cell hybrid propulsion system, which is applicable to the system of claims 1-5, is characterized by comprising the following steps:
s1, the propulsion system module feeds back the working condition of the ship in the sailing process to the processing unit, and the monitoring module transmits the monitored data of the fuel cell and the storage battery pack to the processing unit;
s2, the processing unit calculates the load power P according to the collected working conditionloadCalculating the optimum power P of the fuel cell based on the monitored dataFCFuel cell optimum efficiency ηFCAnd a battery pack SOC value;
s3, the processing unit judges whether the fuel cell has a fault or insufficient raw materials according to the monitored data of the fuel cell, if the fuel cell has the fault or insufficient raw materials, the emergency propulsion working mode of the storage battery pack is selected, otherwise, the step S4 is carried out;
s4, judging 0 < Pload＜PFCAnd ηFCIf not, selecting a fuel cell and storage battery pack parallel propulsion working mode, otherwise, performing step S5;
and S5, judging that the SOC is more than or equal to 40% and less than or equal to 90%, if so, selecting a pure fuel cell propulsion working mode B, and otherwise, selecting a pure fuel cell propulsion working mode A.
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| CN112208737A (en) * | 2020-09-16 | 2021-01-12 | 中船动力研究院有限公司 | Hybrid electric propulsion system |
| CN112224373A (en) * | 2020-09-16 | 2021-01-15 | 中船动力研究院有限公司 | Control method of fuel cell unit for ship and hybrid electric propulsion system |
| CN112224372A (en) * | 2020-09-16 | 2021-01-15 | 中船动力研究院有限公司 | Hybrid electric propulsion system and starting method thereof |
| CN112238790A (en) * | 2020-09-16 | 2021-01-19 | 中船动力研究院有限公司 | Control method of marine storage battery unit and hybrid electric propulsion system |
| CN112249291A (en) * | 2020-09-16 | 2021-01-22 | 中船动力研究院有限公司 | Control method of fuel cell unit for ship and hybrid electric propulsion system |
| CN113428334A (en) * | 2021-08-16 | 2021-09-24 | 广西师范大学 | Marine fuel cell push boat-barge hybrid power system and control method thereof |
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