CN114759541A - Hybrid power supply system and control method thereof - Google Patents
Hybrid power supply system and control method thereof Download PDFInfo
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- CN114759541A CN114759541A CN202210650061.7A CN202210650061A CN114759541A CN 114759541 A CN114759541 A CN 114759541A CN 202210650061 A CN202210650061 A CN 202210650061A CN 114759541 A CN114759541 A CN 114759541A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/109—Scheduling or re-scheduling the operation of the DC sources in a particular order, e.g. connecting or disconnecting the sources in sequential, alternating or in subsets, to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/102—Parallel operation of dc sources being switching converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/14—Balancing the load in a network
- H02J1/16—Balancing the load in a network using dynamo-electric machines coupled to flywheels
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/007—Systems for storing electric energy involving storage in the form of mechanical energy, e.g. fly-wheels
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/008—Systems for storing electric energy using hydrogen as energy vector
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/30—The power source being a fuel cell
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Abstract
The invention discloses a hybrid power supply system and a control method thereof, wherein the system comprises a hydrogen fuel cell power generation unit, a power supply unit and a power supply unit, wherein the hydrogen fuel cell power generation unit is used for outputting direct-current voltage of first power; a hydrogen fuel cell control unit for controlling the hydrogen fuel cell power generation unit; the flywheel energy storage unit is used for executing charging, discharging or standby actions; the flywheel energy storage control unit is used for controlling the flywheel energy storage unit to execute charging, discharging or standby actions; the centralized control unit is used for acquiring the real-time output power of the hydrogen fuel cell power generation unit and the flywheel energy storage unit in real time and sending corresponding control instructions to the hydrogen fuel cell control unit and the flywheel energy storage control unit; the direct current resistor is used for enabling the flywheel energy storage unit to discharge rapidly; the power supply is used for providing a control power supply for the hydrogen fuel cell power generation unit, the hydrogen fuel cell control unit, the flywheel energy storage control unit and the centralized control unit, and has the advantages of high power density, multiple charging and discharging times and the like.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a hybrid power supply system and a control method thereof.
Background
In the field of military equipment, a pulse load refers to a direct-current high-power load such as a high-energy laser weapon, a radar, an electromagnetic gun, an electromagnetic transmitting device and the like, very high power is instantly required in a short time or a very short time, a periodic pulse load refers to a pulse load according to a certain time rule, after a power supply system supplies power to the pulse load according to the rule of power change required by the pulse load for a time period of power output, the power output is immediately reduced to zero, the power output is switched on and off once to form a pulse period, the next pulse period is immediately started after a period of time, and a certain number of pulse periods are repeatedly executed in such a way, so that the typical pulse load with a periodic change rule is formed.
The subgrade mobile transmission scene has randomness in time, has higher requirements on flexibility and mobility, is basically not supplied by a mains supply power grid, needs to be provided with a vehicle-mounted power supply system to supply power for a periodic pulse load, and the power supply system needs to provide energy for the periodic pulse load according to the power requirement of the periodic pulse load to complete a transmission task. Due to the large power and energy density requirements of the pulse load, the conventional power supply system is difficult to withstand the impact of the periodic pulse load.
The technical route of the conventional vehicle-mounted power supply system for supplying power to the periodic pulse load mainly comprises the following modes:
(1) the mode needs to configure the power of the diesel generating set according to the maximum peak power, the maximum configured power has an upper limit, the transient deviation of the output voltage of the set is easily caused by frequent loading and load shedding of the periodic pulse load, the quality of power supply electric energy is poor, the requirement on the performance of an engine is high due to frequent loading of the load, the damage is large, the component is easily damaged, the safety and reliability of power supply are further poor, meanwhile, unpredictable factors are more, the noise is large, and the concealment is poor.
(2) The super capacitor has the characteristics of high power density, quick charge and discharge and long cycle life by adopting a mode of jointly supplying power by a low-power diesel generator set and the super capacitor. According to the mode, a low-power diesel generator set is used for charging a super capacitor, the super capacitor supplies power to a periodic pulse load, but the super capacitor is low in energy density, and a multi-mode set meets the power and energy requirements in a series-parallel connection mode, so that the occupied area is large, the charging and discharging times are about 50 ten thousand, and the energy attenuation problem exists in the using process.
(3) The lithium ion battery has the characteristics of high energy density and strong environmental adaptability by adopting a power supply mode of combining a low-power diesel generator set and the lithium ion battery. According to the mode, a low-power diesel generator set is used for charging a lithium ion battery, the lithium ion battery supplies power to a periodic pulse load, but the lithium ion battery is low in power density and charge-discharge rate, is not suitable for application scenes with high-power frequent charge-discharge requirements, has a risk of thermal runaway in the use process, and has the full-power charge-discharge frequency of only about 5000 times.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the present invention is directed to a hybrid power supply system and a control method thereof.
The invention provides a hybrid power supply system, which comprises: the hydrogen fuel cell power generation unit is connected with the direct current bus and used for outputting direct current voltage of first power; a hydrogen fuel cell control unit connected to the hydrogen fuel cell power generation unit via the dc bus, for controlling the hydrogen fuel cell power generation unit so that the hydrogen fuel cell power generation unit outputs a dc voltage of the first power; the flywheel energy storage unit is connected with the direct current bus and used for charging when the first power is larger than the power required by a load, or discharging when the first power is smaller than the power required by the load, or waiting when the first power is equal to the power required by the load; the flywheel energy storage control unit is connected with the flywheel energy storage unit through the direct current bus and is used for controlling the flywheel energy storage unit to execute charging, discharging or standby actions; the centralized control unit is respectively connected with the hydrogen fuel cell control unit and the flywheel energy storage control unit and is used for acquiring the real-time output power of the hydrogen fuel cell power generation unit and the flywheel energy storage control unit in real time and sending corresponding control instructions to the hydrogen fuel cell control unit and the flywheel energy storage control unit so that the hydrogen fuel cell control unit and the flywheel energy storage control unit correspondingly control the hydrogen fuel cell power generation unit and the flywheel energy storage unit; the direct current resistor is connected with the direct current bus and used for enabling the flywheel energy storage unit to discharge rapidly so as to consume redundant electric quantity; and the power supply is respectively connected with the hydrogen fuel cell power generation unit, the hydrogen fuel cell control unit, the flywheel energy storage control unit and the centralized control unit and is used for providing control power for the hydrogen fuel cell power generation unit, the hydrogen fuel cell control unit, the flywheel energy storage control unit and the centralized control unit.
In addition, the hybrid power supply system according to the embodiment of the present invention may further have the following additional technical features:
further, the hydrogen fuel cell power generation unit includes: a hydrogen supply module for supplying hydrogen to the hydrogen fuel cell power generation unit; an oxygen supply module for supplying oxygen to the hydrogen fuel cell power generation unit; the cooling heat dissipation module is used for cooling and circulating water generated by the reaction of the hydrogen fuel cell; the galvanic pile module is respectively connected with the hydrogen supply module and the oxygen supply module and is used for outputting a first direct current voltage; the first DC/DC power converter is connected with the pile module and used for boosting the first direct-current voltage to the direct-current voltage of the first power.
Further, the flywheel energy storage unit comprises: the flywheel energy storage module is used for outputting a second direct current voltage; and the second DC/DC power converter is correspondingly connected with the flywheel energy storage module and is used for boosting the second direct-current voltage to a direct-current voltage of second power.
Further, the hydrogen supply module includes: a hydrogen storage bottle for storing hydrogen gas; the switch valve is connected with the hydrogen storage bottle and used for controlling the release amount of the hydrogen; and the pressure reducing valve is connected between the switch valve and the stack module, and is used for reducing the pressure of the hydrogen from the switch valve and outputting the hydrogen to the stack module.
Further, the oxygen supply module includes: the air compressor is used for pressurizing air; and the humidifier is connected with the air compressor, is used for humidifying the air from the air compressor and outputs the air to the electric pile module.
Further, the cooling heat dissipation module includes: circulating water pump, radiator and coolant.
Further, the flywheel energy storage module comprises: a flywheel body, a motor/generator, and a bi-directional DC/AC power converter.
Further, the centralized control unit includes: the data acquisition module is used for acquiring the real-time output power of the hydrogen fuel cell power generation unit and the flywheel energy storage unit and the power required by the load in real time; the comparison and analysis module is used for comparing and analyzing the real-time output power of the hydrogen fuel cell power generation unit and the real-time output power of the flywheel energy storage unit and determining the action to be executed by the flywheel energy storage unit according to the comparison and analysis result, wherein the action comprises charging, discharging or standby; the logic operation module is used for calculating the power value of the flywheel energy storage unit for charging or discharging; and the control module is used for sending corresponding control instructions to the hydrogen fuel cell control unit and the flywheel energy storage control unit so that the hydrogen fuel cell control unit and the flywheel energy storage control unit correspondingly control the hydrogen fuel cell power generation unit and the flywheel energy storage unit.
According to the hybrid power supply system provided by the embodiment of the invention, based on an advanced flywheel physical energy storage technology and a hydrogen fuel cell technology, the hybrid power supply system is applied in the field of stabilizing the power fluctuation of the periodic pulse load, namely, a hydrogen fuel cell power generation unit is adopted to replace a traditional generator set, so that the hybrid power supply system has the characteristics of small size, light weight, low noise, low carbon, environmental protection, simplicity in operation and maintenance and the like, and the flywheel energy storage unit is adopted to replace a lithium ion battery or a super capacitor, so that the hybrid power supply system has the advantages of high power density, long service life, multiple charging and discharging times, no energy attenuation, safety, reliability and the like.
In view of the above existing problems, the present invention further provides a control method of a hybrid power supply system, for use in the hybrid power supply system according to any of the above embodiments, the method including: the centralized control unit acquires the load required power of the periodic pulse load and the first power output by the hydrogen fuel cell power generation unit in real time; if the first power is larger than the power required by the load, the centralized control unit controls the flywheel energy storage unit to charge; if the first power is smaller than the power required by the load, the centralized control unit controls the flywheel energy storage unit to discharge; and if the first power is equal to the power required by the load, the centralized control unit controls the flywheel energy storage unit to stand by.
In addition, the control method of the hybrid power supply system according to the embodiment of the present invention may further have the following additional technical features:
further, the charging power of the flywheel energy storage unit is not greater than the lower limit value of the first power.
Further, the discharging power of the flywheel energy storage unit is not larger than the upper limit value of the difference between the peak value of the power required by the load and the first power.
Further, the lower limit value of the first power is larger than the upper limit value of the difference between the peak value of the power required by the load and the first power.
Further, the method further comprises: when the power required by the load is equal to zero, judging whether the sum of the residual electric quantity of the flywheel energy storage unit and the maximum value of the actual charging electric quantity is smaller than the rated electric quantity of the flywheel energy storage unit, if so, enabling the hybrid power supply system to enter a next pulse load required power loading period, otherwise, starting a direct current resistor to consume the residual electric quantity, and enabling the hybrid power supply system to enter the next pulse load required power loading period until the sum of the residual electric quantity of the flywheel energy storage unit and the maximum value of the actual charging electric quantity is equal to the rated electric quantity of the flywheel energy storage unit.
According to the control method of the hybrid power supply system, when the first power output by the hydrogen fuel cell power generation unit is larger than the power required by the periodic pulse load, the flywheel energy storage unit is charged, or when the first power output by the hydrogen fuel cell power generation unit is smaller than the power required by the periodic pulse load, the flywheel energy storage unit is discharged, or when the first power output by the hydrogen fuel cell power generation unit is equal to the power required by the periodic pulse load, the flywheel energy storage unit is controlled to be in standby state, namely the characteristic that the flywheel energy storage unit can be frequently charged and discharged due to short-time high power is utilized, the peak power during the operation period of the periodic pulse load is stabilized, the transient voltage deviation is stabilized, and the reliability of power supply safety and the power quality are improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic configuration diagram of a hybrid power supply system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a centralized control unit in accordance with one embodiment of the present invention;
fig. 3 is a flowchart of a control method of a hybrid power supply system according to an embodiment of the present invention;
fig. 4 is a flowchart of control of a hybrid power supply system according to another embodiment of the present invention;
FIG. 5 is a graphical illustration of the fluctuation curve of the power required for a periodic pulsed load in accordance with one embodiment of the present invention;
fig. 6 is a graph illustrating the fluctuation of the power required by a periodically pulsed load, according to another embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
A hybrid power supply system and a control method thereof according to an embodiment of the present invention are described below with reference to fig. 1 to 6.
Fig. 1 is a schematic structural diagram of a hybrid power supply system according to an embodiment of the present invention. As shown in fig. 1, a hybrid power supply system includes: a hydrogen fuel cell power generation unit 10, a hydrogen fuel cell control unit 20, a flywheel energy storage unit 30, a flywheel energy storage control unit 40, a centralized control unit 50, a direct current resistor 60, and a power supply 70. The hydrogen fuel cell power generation unit 10 is connected to a dc bus 80, and outputs a dc voltage of a first power; the hydrogen fuel cell control unit 20 is connected to the hydrogen fuel cell power generation unit 10 via a dc bus 80, and is configured to control the hydrogen fuel cell power generation unit 10 such that the hydrogen fuel cell power generation unit 10 outputs a dc voltage of a first power; the flywheel energy storage unit 30 is connected to the dc bus 80, and is used for charging when the first power is greater than the power required by the load 90, or discharging when the first power is less than the power required by the load 90, or performing standby when the first power is equal to the power required by the load 90; the flywheel energy storage control unit 40 is connected with the flywheel energy storage unit 30 through a direct current bus 80, and is used for controlling the flywheel energy storage unit 30 to execute charging, discharging or standby actions; the centralized control unit 50 is respectively connected to the hydrogen fuel cell control unit 20 and the flywheel energy storage control unit 40, and is configured to collect real-time output powers of the hydrogen fuel cell power generation unit 10 and the flywheel energy storage control unit 30 in real time, and send corresponding control instructions to the hydrogen fuel cell control unit 20 and the flywheel energy storage control unit 40, so that the hydrogen fuel cell control unit 20 and the flywheel energy storage control unit 40 control the hydrogen fuel cell power generation unit 10 and the flywheel energy storage unit 30; the dc resistor 60 is connected to the dc bus 80 for rapidly discharging the flywheel energy storage unit 30 to consume the excess electric power; the power supply 70 is respectively connected with the hydrogen fuel cell power generation unit 10, the hydrogen fuel cell control unit 20, the flywheel energy storage unit 30, the flywheel energy storage control unit 40 and the centralized control unit 50, and is used for providing control power to the hydrogen fuel cell power generation unit 10, the hydrogen fuel cell control unit 20, the flywheel energy storage unit 30, the flywheel energy storage control unit 40 and the centralized control unit 50.
Specifically, the hydrogen fuel cell power generation unit 10 and the flywheel energy storage unit 30 may form a hybrid power supply system, the hydrogen fuel cell control unit 20 is configured to monitor an operation state of the hydrogen fuel cell power generation unit 10 in real time, acquire power data, and receive a control instruction of the centralized control unit 50, and the flywheel energy storage control unit 40 is configured to monitor an operation state of the flywheel energy storage unit 30 in real time, acquire power data, and receive a control instruction of the centralized control unit 50. Wherein, the hydrogen fuel cell power generation unit 10 is used as a main power supply to provide constant power output for a load such as a periodic pulse load 90, namely, the dc voltage with the first power is output to the periodic pulse load 90, the flywheel energy storage unit 30 serves as an auxiliary power supply to perform peak clipping and valley filling on the power supply voltage during the period that the main power supply supplies power to the periodic pulse load 90 with constant power, i.e., charging when the first power is greater than the power required by the periodic pulsed load 90, or discharging when the first power is less than the power required by the periodic pulsed load 90, or standing by when the first power is equal to the power required by the periodic pulsed load 90, namely, the characteristic that the flywheel energy storage unit 30 can be charged and discharged frequently with high power in a short time is utilized to stabilize the peak power of the periodic pulse load 90 during the operation period, stabilize the transient voltage deviation and improve the reliability of power supply safety and the electric energy quality. The embodiment of the invention is based on an advanced flywheel physical energy storage technology and a hydrogen fuel cell technology, and provides a hybrid power supply system applied in the field of stabilizing the power fluctuation of a periodic pulse load 90, namely, a hydrogen fuel cell power generation unit 10 is adopted to replace a traditional generator set, and the hybrid power supply system has the characteristics of small volume, light weight, low noise, low carbon, environmental protection, simplicity in operation and maintenance and the like, and has the advantages of high power density, long service life, multiple charging and discharging times, no energy attenuation, safety, reliability and the like by adopting a flywheel energy storage unit 30 to replace a lithium ion battery or a super capacitor.
It can be understood that, in practical applications, the hybrid power supply system may be deployed in a vehicle-mounted environment, the power source 70 is a power takeoff generator, and the hybrid power supply system serves as a vehicle-mounted power supply system to supply power to the pulse load 90, such as high-energy laser weapons, radars, electromagnetic cannons, and other weaponry, so that the hybrid power supply system has the advantage of floor space saving, and improves flexibility, maneuverability, and concealment of the hybrid power supply system.
In a specific embodiment, during each pulse cycle load loading period, if the loading power required by the pulse load 90 is less than the output power of the primary power supply (i.e., the hydrogen fuel cell power generation unit 10), the auxiliary power supply (i.e., the flywheel energy storage unit 30) acts as a load to absorb the redundant power output by the primary power supply, and the primary power supply charges the auxiliary power supply; if the loading power required by the pulse load 90 is greater than the output power of the main power supply, the auxiliary power supply discharges and is combined with the main power supply to supply power to the pulse load 90, namely, the auxiliary power supply has a periodic alternating stage of charging and discharging during the loading period of the pulse load 90, so that the power output by the main power supply is ensured to be stabilized at a stable balance point, the stabilization of the peak power of the periodic pulse load during the operation period is realized, the transient voltage deviation caused by sudden increase and sudden decrease of the load is stabilized, and the safety reliability and the power quality of power supply are improved.
In one embodiment of the present invention, as shown in fig. 1, a hydrogen fuel cell power generation unit includes: a hydrogen supply module 11, an oxygen supply module 12, a cooling heat dissipation module 13, a stack module 14, and a first DC/DC power converter 15. Wherein the hydrogen gas supply module 11 is used for supplying hydrogen gas to the hydrogen fuel cell power generation unit 10; the oxygen supply module 12 is for supplying oxygen to the hydrogen fuel cell power generation unit 10; the cooling heat dissipation module 13 is used for cooling and circulating water generated by the reaction of the hydrogen fuel cell; the stack module 14 is respectively connected with the hydrogen supply module 11 and the oxygen supply module 12, and is used for outputting a first direct-current voltage; the first DC/DC power converter 15 is connected to the stack module 14 for boosting the first DC voltage to a DC voltage of the first power.
Specifically, the first DC/DC power converter 15 includes a plurality of DC/DC power conversion units 151 connected in parallel, the stack module 14 includes a plurality of stack units 141 connected in parallel, and under the control of the hydrogen fuel cell control unit 20, the DC voltage output from each stack unit 141 is boosted to a required DC voltage by the DC/DC power conversion unit 151 connected in series corresponding thereto, and then output to the DC bus 80 to supply power to the periodic pulse load 90. Specifically, the hydrogen fuel cell power generation unit 10 outputs a first direct current voltage by an electrochemical reaction of hydrogen and oxygen in the stack module 14, and boosts the first direct current voltage to a direct current voltage of a first power through the first DC/DC power converter 15.
In one embodiment of the present invention, as shown in fig. 1, the flywheel energy storage unit 30 includes: at least one flywheel energy storage module 31 and a second DC/DC power converter 32 connected to the flywheel energy storage module. The at least one flywheel energy storage module 31 is configured to output a second direct current voltage; the second DC/DC power converter 32 is configured to boost the second DC voltage to a DC voltage of the second power.
Specifically, a plurality of flywheel energy storage modules 31 and second DC/DC power converters 32 correspondingly connected to the flywheel energy storage modules are connected in parallel to form a flywheel energy storage unit 30 with a certain power and capacity, under the coordination control of the flywheel energy storage control unit 40, the flywheel energy storage unit 30 outputs kinetic energy in the form of electric energy (i.e., outputs a second DC voltage) to the second DC/DC power converters 32, and the kinetic energy is boosted to a required DC voltage (i.e., obtains a DC voltage of a second power) by the second DC/DC power converters 32 and is output to a DC bus to supply power to a pulse load.
In one embodiment of the present invention, as shown in fig. 1, the hydrogen supply module 11 includes: a hydrogen storage cylinder 111, an on-off valve 112, and a pressure reducing valve 113. Wherein, the hydrogen storage bottle 111 is used for storing hydrogen; the switch valve 112 is connected with the hydrogen storage bottle 111 and used for controlling the release amount of hydrogen; the pressure reducing valve 113 is connected between the on-off valve 112 and the stack module 14, and is configured to reduce the pressure of the hydrogen gas from the on-off valve 112 and output the hydrogen gas to the stack module 14.
In the embodiment, hydrogen is stored in a high-pressure carbon fiber hydrogen storage bottle, the release amount and pressure of hydrogen are controlled by the switch valve 112 and the pressure reducing valve 113, and the hydrogen enters the stack module 14 through the gas channel to perform electrochemical reaction and then outputs electric energy.
In one embodiment of the present invention, as shown in fig. 1, the oxygen supply module 12 includes: an air compressor 121 and a humidifier 122. The air compressor 121 is used for pressurizing air; the humidifier 122 is connected to the air compressor 121, and is configured to humidify the air from the air compressor 121 and output the air to the stack module 14.
In one embodiment, the air is pressurized by the air compressor 121 to provide clean air at a desired pressure and flow rate to the stack module 14, and the humidifier 122 humidifies the reactant gases (i.e., hydrogen and oxygen) entering the stack module 14 to increase the service life and output power of the stack module 14.
In one embodiment of the present invention, as shown in fig. 1, the cooling heat dissipation module 13 includes: a circulating water pump, a radiator and a cooling liquid, which are used for cooling and circulating water generated in the reaction process of the hydrogen fuel cell power generation unit.
In one embodiment of the present invention, as shown in fig. 1, the flywheel energy storage module 31 includes: a flywheel body 311, a motor/generator 312, and a bidirectional DC/AC power converter 313.
Specifically, the flywheel energy storage module 31 drives the flywheel body 311 to rotate at a high speed through the motor 312, stores electric energy in the form of kinetic energy, then drives the generator 312 to generate electricity through the flywheel inertia rotating at a high speed, outputs the kinetic energy in the form of electric energy (i.e., outputs the second direct current voltage) to the second DC/DC power converter 32, and then boosts the kinetic energy to the required direct current voltage (i.e., obtains the direct current voltage of the second power) by the second DC/DC power converter 32, and outputs the direct current voltage to the direct current bus 80 to supply power to the pulse load 90.
In one embodiment of the present invention, as shown in fig. 2, the centralized control unit 50 includes: a data acquisition module 51, a comparison and analysis module 52, a logic operation module 53 and a control module 54. The data acquisition module 51 is configured to acquire real-time output powers of the hydrogen fuel cell power generation unit 10 and the flywheel energy storage unit 30, and power required by the load 90 in real time; the comparison and analysis module 52 is configured to compare and analyze the real-time output powers of the hydrogen fuel cell power generation unit 10 and the flywheel energy storage unit 30, and determine an action to be performed by the flywheel energy storage unit 30 according to a comparison and analysis result, where the action includes charging, discharging, or standby; the logic operation module 53 is configured to calculate a power value of the flywheel energy storage unit 30 for charging or discharging; the control module 54 is configured to send corresponding control instructions to the hydrogen fuel cell control unit 20 and the flywheel energy storage control unit 40, so that the hydrogen fuel cell control unit 20 and the flywheel energy storage control unit 40 control the hydrogen fuel cell power generation unit 10 and the flywheel energy storage unit 30 correspondingly, so as to control the output powers of the hydrogen fuel cell power generation unit 10 and the flywheel energy storage unit 30 in real time.
According to the hybrid power supply system provided by the embodiment of the invention, based on the advanced flywheel physical energy storage technology and the hydrogen fuel cell technology, the hybrid power supply system is applied in the field of stabilizing the power fluctuation of the periodic pulse load, namely, the hydrogen fuel cell power generation unit is adopted to replace the traditional generator set, so that the hybrid power supply system has the characteristics of small volume, light weight, low noise, low carbon, environmental protection, simplicity in operation and maintenance and the like, and the flywheel energy storage unit is adopted to replace a lithium ion battery or a super capacitor, so that the hybrid power supply system has the advantages of high power density, long service life, multiple charging and discharging times, no energy attenuation, safety, reliability and the like. The hybrid power supply system can be deployed in a vehicle-mounted environment, so that the flexibility, the maneuverability and the concealment of the hybrid power supply system are improved.
A further embodiment of the present invention also discloses a control method of a hybrid power supply system, which is used for the hybrid power supply system according to any of the above embodiments. Fig. 3 is a flowchart of a control method of a hybrid power supply system according to an embodiment of the present invention. As shown in fig. 3, the method comprises the steps of:
and step S1, the centralized control unit acquires the load required power of the periodic pulse load and the first power output by the hydrogen fuel cell power generation unit in real time.
And step S2, if the first power is larger than the power required by the load, the centralized control unit controls the flywheel energy storage unit to charge.
And step S3, if the first power is less than the power required by the load, the centralized control unit controls the flywheel energy storage unit to discharge.
And step S4, if the first power is equal to the power required by the load, the centralized control unit controls the flywheel energy storage unit to stand by.
Specifically, the hydrogen fuel cell power generation unit is used as a main power supply to provide constant-power output for a load such as a periodic pulse load, namely, the direct current voltage with the first power is output to the periodic pulse load, the flywheel energy storage unit is used as an auxiliary power supply to perform the functions of peak clipping and valley filling on the power supply voltage during the period that the main power supply supplies power to the periodic pulse load with constant power, i.e. charging when the first power is larger than the power required by the periodic pulsed load, or discharging when the first power is smaller than the power required by the periodic pulsed load, or standing by when the first power is equal to the power required by the periodic pulsed load, the characteristic that the flywheel energy storage unit can be charged and discharged frequently with short-term high power is utilized, peak power during the operation period of the periodic pulse load is stabilized, transient voltage deviation is stabilized, and reliability of power supply safety and electric energy quality are improved. The embodiment of the invention provides a hybrid power supply system applied to the field of stabilizing the power fluctuation of a periodic pulse load based on an advanced flywheel physical energy storage technology and a hydrogen fuel cell technology, namely, the peak power of the periodic pulse load during operation is stabilized by utilizing the characteristic that a flywheel energy storage unit can be frequently charged and discharged at short time and high power, the transient voltage deviation is stabilized, and the reliability of power supply safety and the power quality are improved.
In one embodiment of the invention, the charging power of the flywheel energy storage unit is not greater than the lower limit value of the first power.
Specifically, P is set1The power supply output is constant power, namely, the direct current voltage with first power is output to the periodic pulse load. If the maximum precision error rate of the output power of the main power supply is defined because the output power of the main power supply has precision error
，
Representing the positive deviation of the actual output power of the main power supply, wherein the actual output power of the main power supply is greater than the rated output power of the main power supply, namely the upper limit value of the output power of the main power supply is
，
Represents the negative deviation of the actual output power of the main power supply, the actual output power of the main power supply is smaller than the rated output power of the main power supply, namely the lower limit value of the output power of the main power supply is
. When the flywheel energy storage unit (hereinafter referred to as "auxiliary power supply") enters a charging state, the theoretical charging power is the upper limit value of the output power of the main power supply, namely
Thus, setting
Setting the maximum charging power of the auxiliary power supply as the lower limit value of the output power of the main power supply to ensure the reliability of the charging capacity of the auxiliary power supply during the charging period by considering the error rate of the output power of the main power supply for the rated power of the auxiliary power supply
I.e. by
That is, the charging power of the auxiliary power supply is not greater than the lower limit value of the first power.
In one embodiment of the invention, the discharge power of the flywheel energy storage unit is not greater than the upper limit value of the difference between the peak power value required by the load and the first power.
In particular, when the periodic pulse load requires a peak power such as P3Greater than hydrogen fuelWhen the first power is output by the battery power generation unit, the auxiliary power supply enters a discharging state and the theoretical maximum discharging power is the peak power P required by the load3And the rated output power P of the main power supply3The difference of (c). Considering error rate of output power of main power supply, in order to ensure reliability of discharge power of auxiliary power supply during discharge period, setting maximum discharge power of auxiliary power supply as peak power P required by load3Rated output power of main power supply
Upper limit value of difference, i.e.
。
In one embodiment of the invention, the lower limit value of the first power is larger than the upper limit value of the difference between the peak value of the power required by the load and the first power.
Specifically, the maximum charging power of the auxiliary power supply is greater than the maximum discharging power, that is, the lower limit value of the first power is greater than the upper limit value of the difference between the peak value of the power required by the load and the first power.
In one embodiment of the invention, the method further comprises: when the power required by the load is equal to zero, judging whether the sum of the residual electric quantity of the flywheel energy storage unit and the maximum value of the actual charging electric quantity is smaller than the rated electric quantity of the flywheel energy storage unit, if so, enabling the hybrid power supply system to enter a next power loading period required by the pulse load, otherwise, starting a direct current resistor to consume the residual electric quantity, and enabling the hybrid power supply system to enter the next power loading period required by the pulse load until the sum of the residual electric quantity of the flywheel energy storage unit and the maximum value of the actual charging electric quantity is equal to the rated electric quantity of the flywheel energy storage unit.
Specifically, the residual capacity of the auxiliary power supply after charging and discharging in the (n-1) th periodic pulse load power loading interval is
By calculating the contrast by the central control unit
，
The rated electric quantity of the auxiliary power supply. If the centralized control unit calculates the comparison
That is, the redundant power output by the main power supply at constant power cannot be completely absorbed by the auxiliary power supply, it is necessary to load the power in the nth periodic pulse load power loading interval
The voltage is consumed by the DC resistance, and the comparison is recalculated until the voltage is reduced to zero
Namely, the direct current resistor is started to consume the residual electric quantity, and the hybrid power supply system enters the power loading period required by the next pulse load until the sum of the residual electric quantity of the flywheel energy storage unit and the maximum value of the actual charging electric quantity is equal to the rated electric quantity of the flywheel energy storage unit.
As a specific embodiment, the control method of the hybrid power supply system in the specific embodiment is exemplarily described below with reference to fig. 4 and 5, so as to be used for better understanding of the control method of the hybrid power supply system in the embodiment of the present invention.
A control method of the hybrid power supply system according to an embodiment of the present invention is described below with reference to fig. 4, and as shown in fig. 4, a flowchart of the control of the hybrid power supply system according to an embodiment of the present invention is shown.
In step S20, the hybrid power supply system enters the power loading period required by the 1 st pulse load.
Step S201, at the initial time of t0, the power required by the load is equal to zero, the primary power supply is controlled to output a dc voltage of a first power, and the auxiliary power supply, as a load, absorbs the output power of the primary power supply and enters a full power charging state.
Step S202, determining whether the power required by the load is greater than zero and less than the first power, if so, performing step S203, otherwise, performing step S201.
Step S203, controlling the main power supply to output the DC voltage of the first power when t is more than 0 and less than t1.1, the auxiliary power supply keeps the charging state, and the charging power of the auxiliary power supply approaches zero as the power required by the load approaches the first power.
Step S204, determining whether the power required by the load is equal to the first power, if so, performing step S205, otherwise, performing step S203.
In step S205, at time t1.1, the power required by the load is equal to the first power, the charging power of the auxiliary power supply is equal to zero, and the operating mode of the auxiliary power supply is switched from the charging state to the standby state.
Step S206, determining whether the power required by the load is greater than the first power, if so, performing step S207, otherwise, performing step S205.
Step S207, when t1.1 is more than t and less than t1.2, the power required by the load is more than the first power, the main power supply is controlled to output the first power, the working mode of the auxiliary power supply enters a discharging state from a standby state, and the discharging power of the auxiliary power supply approaches the maximum discharging power as the power required by the load approaches the peak power.
In step S208, it is determined whether the power required by the load is equal to the peak power, if so, step S209 is performed, otherwise, step S207 is performed.
And step S209, at the time of t 1.2-t 2, the power required by the load is equal to the peak power, the auxiliary power supply is used as a power supply to cooperate with the main power supply to carry out power output, and the discharge power of the auxiliary power supply is equal to the maximum discharge power.
Step S210, determining whether the power required by the load is equal to zero, if yes, performing step S211, otherwise performing step S209.
In step S211, the 1 st pulse load power loading period ends.
Step S212, after the 1 st pulse load power loading cycle is finished, determining whether the remaining capacity of the auxiliary power supply meets the condition to enter the next cycle, if yes, performing step S213, otherwise, performing step S214.
Step S213, the hybrid power supply system enters a 2 nd pulse load required power loading period.
Step S214, starting the direct current resistor, increasing the total power of the load, and consuming the residual electric quantity until the next cycle is met.
FIG. 5 is a graph showing the fluctuation of the power required by the periodically pulsed load, as shown in FIG. 5, the ordinate represents the power kW, and the abscissa represents the time t, P3The peak power required by the periodic pulse load is that the loading interval of the power required by the pulse load is
The time of day. Wherein, t0At the moment, power required by the load, e.g. P4The flywheel energy storage unit (hereinafter referred to as "auxiliary power supply") plays a role of filling in the valley during the period that the main power supply supplies power to the periodic pulse load at constant power (namely, the main power supply outputs direct-current voltage with first power to the periodic pulse load), namely, the auxiliary power supply is used as a load to absorb the output power of the main power supply, at the moment, when the flywheel energy storage unit (hereinafter referred to as "auxiliary power supply") enters a charging state, the theoretical charging power is the upper limit value of the output power of the main power supply, namely, the theoretical charging power is the lower limit value of the output power of the main power supply, namely, the auxiliary power supply
Thus, setting
Setting the maximum charging power of the auxiliary power supply as the lower limit value of the output power of the main power supply to ensure the reliability of the charging capacity of the auxiliary power supply during the charging period by considering the error rate of the output power of the main power supply for the rated power of the auxiliary power supply
I.e. by
。
As shown in FIG. 5, 0<t<t1.1Constant power output of main power supplyFor example, is P1As the power demanded by the load approaches P1The auxiliary power supply continues to maintain the charging state, and the charging power of the auxiliary power supply approaches zero.
As shown in fig. 5, t = t1.1Time of day, load required power P4= P1That is, the output power of the main power supply is equal to the power required by the load, the charging power of the auxiliary power supply is equal to zero, and the auxiliary power supply is switched from the charging state to the standby state.
As shown in fig. 5, in
At the moment, the shadow area is a charging interval 1 of the auxiliary power supply, and the theoretical charging capacity
，
The real-time charging power of the auxiliary power supply is not more than the maximum charging power
. Considering the maximum accuracy error rate in the charging process of the auxiliary power supply
，
Represents a positive deviation of the charging power of the auxiliary power supply, i.e. the charging power of the auxiliary power supply is greater than the rated power of the auxiliary power supply,
representing a negative deviation of the charging power of the auxiliary power supply, the actual charging power of the auxiliary power supply being smaller than the rated power of the auxiliary power supply, in order to ensure the reliability of the charging capacity of the auxiliary power supply during charging, the actual charging capacity
。
As shown in figure 5 of the drawings,
at the moment, power required by the load, e.g. P4Greater than the rated power P of the main power supply1The main power supply keeps the rated output power P1Supplying power to the load, exceeding the rated output power P of the main power supply1The auxiliary power supply is switched from a standby state to a discharge state, and the power required by the load approaches P3The discharge power of the auxiliary power supply approaches the rated value P2；
As shown in the figure 5 of the drawings,
at the moment, the power required by the load is equal to P3The auxiliary power supply plays a role in peak clipping during the period that the main power supply supplies power to the periodic pulse load at constant power, and at the moment, the auxiliary power supply enters a discharge state and the theoretical maximum discharge power is the peak power P required by the load3Rated output power P of main power supply3The difference of (a). Considering the error rate of the output power of the main power supply, in order to ensure the reliability of the discharge electric quantity of the auxiliary power supply during the discharge period, the maximum discharge power of the auxiliary power supply is set as the peak power P required by the load3And the rated output power P of the main power supply1Upper limit value of difference, i.e.
。
As shown in the figure 5 of the drawings,
at the moment, the shadow area is the discharge interval 1 of the auxiliary power supply, and the theoretical discharge electric quantity
，
To assist electricitySource real-time discharge power and maximum discharge power not greater than
. Taking into account the maximum accuracy error rate of the auxiliary power supply during discharge
，
Represents a positive deviation of the discharge power of the auxiliary power supply, i.e. the discharge power of the auxiliary power supply is greater than the rated power of the auxiliary power supply,
representing a negative deviation of the discharge power of the auxiliary power supply, i.e. the actual discharge power of the auxiliary power supply is less than the rated power of the auxiliary power supply, in order to ensure the reliability of the discharge capacity of the auxiliary power supply during charging, the actual discharge capacity
。
As shown in fig. 5, when
I.e. after the first periodic pulse load power loading interval is finished
In the second periodic pulse load power loading interval, at the initial stage of the second periodic pulse load power loading, the residual electric quantity of the auxiliary power supply after charging and discharging in the first periodic pulse load power loading interval is
Wherein
To assist the power discharge efficiency, the nth
) The residual electric quantity of the auxiliary power supply after charging and discharging in the (n-1) th periodic pulse load power loading interval is
By calculating the contrast by the central control unit
，
The rated electric quantity of the auxiliary power supply. If the centralized control unit calculates the comparison
That is, the redundant power output by the main power supply at constant power cannot be completely absorbed by the auxiliary power supply, it is necessary to load the power in the nth periodic pulse load power loading interval
The voltage is consumed by the DC resistance, and the comparison is recalculated until the voltage is reduced to zero
Namely, the direct current resistor is started to consume the residual electric quantity, and the hybrid power supply system enters the power loading period required by the next pulse load until the sum of the residual electric quantity of the flywheel energy storage unit and the maximum value of the actual charging electric quantity is equal to the rated electric quantity of the flywheel energy storage unit.
From the above analysis and calculation:
(1) power configuration method of main power supply and auxiliary power supply, setting
Setting the maximum charging power of the auxiliary power supply as the lower limit value of the output power of the main power supply for the rated power of the auxiliary power supply
Setting the maximum discharge power of the auxiliary power supply as the rated peak power P of the load3And the rated output power P of the main power supply1Upper limit value of difference, i.e.
The logic relationship among the rated power of the auxiliary power supply, the maximum charging power of the auxiliary power supply and the maximum discharging power of the auxiliary power supply is
。
(2) A capacity allocation method for the auxiliary power supply, setting the discharge efficiency of the auxiliary power supply to
Then, then
And is suitable for infinitely approaching zero;
(3) calculating contrast
That is, when the excess power output by the main power supply at constant power cannot be completely absorbed by the auxiliary power supply, the power load of the nth periodic pulse load needs to be loaded in the interval
The voltage is consumed by the DC resistance, and the comparison is recalculated until the voltage is reduced to zero
。
In conjunction with the above analysis and calculation, taking fig. 6 as an example, the peak power required by the periodic pulse load is, for example, 2000kW, the constant power output by the primary power supply is, for example, 1500kW, and the actual output power deviation of the primary power supply is set to
Then, then
Is 1530kW of water and is,
is 1470kW of the total weight of the coke oven,
530kW, the maximum accuracy error rate of the auxiliary power supply during charging is set as
Setting the maximum accuracy error rate of the auxiliary power supply in the discharging process
Setting the discharge efficiency of the auxiliary power supply to 90%, based on
Computing, e.g.
=0.294kWh；
According to
Computing, e.g.
=0.260kWh；
Calculating contrast
Can meet the charging and discharging requirements according to
Is rated power of auxiliary power supply and
the auxiliary power supply is configured for auxiliary power supply rated capacity, for example, the auxiliary power supply may be configured with two 1000kW/0.84kWh flywheel energy storage systems, i.e., 1530kW/0.6426kWh,
computing
，
And the loading interval of 10 periodical pulse load power can be met. According to the analysis and calculation, power supply systems with different powers and capacities are configured as required, the structural design of the vehicle-mounted power supply system can be optimized through the optimized proportion of the capacities and the powers of the main power supply and the auxiliary power supply, the occupied area is reduced, the flexibility and the maneuverability of the vehicle-mounted power supply system are improved, the peak power of the periodic pulse load during operation is stabilized, and the transient voltage deviation is stabilized, so that the safety and the reliability of power supply and the power quality are improved.
According to the control method of the hybrid power supply system, when the first power output by the hydrogen fuel cell power generation unit is larger than the power required by the periodic pulse load, the flywheel energy storage unit is charged, or when the first power output by the hydrogen fuel cell power generation unit is smaller than the power required by the periodic pulse load, the flywheel energy storage unit is discharged, or when the first power output by the hydrogen fuel cell power generation unit is equal to the power required by the periodic pulse load, the flywheel energy storage unit is controlled to be in standby state, namely the characteristic that the flywheel energy storage unit can be frequently charged and discharged due to short-time high power is utilized, the peak power during the operation period of the periodic pulse load is stabilized, the transient voltage deviation is stabilized, and the reliability of power supply safety and the power quality are improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. A hybrid power supply system, comprising:
the hydrogen fuel cell power generation unit is connected with the direct current bus and used for outputting direct current voltage of first power;
a hydrogen fuel cell control unit connected to the hydrogen fuel cell power generation unit via the dc bus, for controlling the hydrogen fuel cell power generation unit so that the hydrogen fuel cell power generation unit outputs a dc voltage of the first power;
the flywheel energy storage unit is connected with the direct current bus and used for charging when the first power is larger than the power required by a load, or discharging when the first power is smaller than the power required by the load, or waiting when the first power is equal to the power required by the load;
the flywheel energy storage control unit is connected with the flywheel energy storage unit through the direct current bus and is used for controlling the flywheel energy storage unit to execute charging, discharging or standby actions;
the centralized control unit is respectively connected with the hydrogen fuel cell control unit and the flywheel energy storage control unit and is used for acquiring the real-time output power of the hydrogen fuel cell power generation unit and the flywheel energy storage control unit in real time and sending corresponding control instructions to the hydrogen fuel cell control unit and the flywheel energy storage control unit so that the hydrogen fuel cell control unit and the flywheel energy storage control unit correspondingly control the hydrogen fuel cell power generation unit and the flywheel energy storage unit;
the direct current resistor is connected with the direct current bus and used for enabling the flywheel energy storage unit to discharge rapidly so as to consume redundant electric quantity;
and the power supply is respectively connected with the hydrogen fuel cell power generation unit, the hydrogen fuel cell control unit, the flywheel energy storage control unit and the centralized control unit and used for providing a control power supply for the hydrogen fuel cell power generation unit, the hydrogen fuel cell control unit, the flywheel energy storage control unit and the centralized control unit.
2. The hybrid power supply system according to claim 1, wherein the hydrogen fuel cell power generation unit includes:
a hydrogen supply module for supplying hydrogen to the hydrogen fuel cell power generation unit;
an oxygen supply module for supplying oxygen to the hydrogen fuel cell power generation unit;
the cooling heat dissipation module is used for cooling and circulating water generated by the reaction of the hydrogen fuel cell;
the galvanic pile module is respectively connected with the hydrogen supply module and the oxygen supply module and is used for outputting a first direct current voltage;
the first DC/DC power converter is connected with the pile module and used for boosting the first direct-current voltage to the direct-current voltage of the first power.
3. The hybrid power supply system of claim 1, wherein the flywheel energy storage unit comprises:
the flywheel energy storage module is used for outputting a second direct current voltage;
and the second DC/DC power converter is correspondingly connected with the flywheel energy storage module and is used for boosting the second direct-current voltage to a direct-current voltage of second power.
4. The hybrid power supply system of claim 2, wherein the hydrogen supply module comprises:
a hydrogen storage bottle for storing hydrogen gas;
the switch valve is connected with the hydrogen storage bottle and used for controlling the release amount of the hydrogen;
and the pressure reducing valve is connected between the switch valve and the stack module, and is used for reducing the pressure of the hydrogen from the switch valve and outputting the hydrogen to the stack module.
5. The hybrid power supply system of claim 2, wherein the oxygen supply module comprises:
the air compressor is used for pressurizing air;
and the humidifier is connected with the air compressor, is used for humidifying the air from the air compressor and outputs the air to the electric pile module.
6. The hybrid power supply system of claim 2, wherein the cooling and heat dissipating module comprises: circulating water pump, radiator and coolant.
7. The hybrid power supply system of claim 3, wherein the flywheel energy storage module comprises: a flywheel body, a motor/generator, and a bidirectional DC/AC power converter.
8. The hybrid power supply system according to claim 1, wherein the central control unit includes:
the data acquisition module is used for acquiring the real-time output power of the hydrogen fuel cell power generation unit and the flywheel energy storage unit and the power required by the load in real time;
the comparison and analysis module is used for comparing and analyzing the real-time output power of the hydrogen fuel cell power generation unit and the real-time output power of the flywheel energy storage unit and determining the action to be executed by the flywheel energy storage unit according to the comparison and analysis result, wherein the action comprises charging, discharging or standby;
the logic operation module is used for calculating the power value of the flywheel energy storage unit for charging or discharging;
and the control module is used for sending corresponding control instructions to the hydrogen fuel cell control unit and the flywheel energy storage control unit so that the hydrogen fuel cell control unit and the flywheel energy storage control unit correspondingly control the hydrogen fuel cell power generation unit and the flywheel energy storage unit.
9. A control method for a hybrid power supply system according to any one of claims 1 to 8, the method comprising:
the centralized control unit acquires the load required power of the periodic pulse load and the first power output by the hydrogen fuel cell power generation unit in real time;
if the first power is larger than the power required by the load, the centralized control unit controls the flywheel energy storage unit to charge;
if the first power is smaller than the power required by the load, the centralized control unit controls the flywheel energy storage unit to discharge;
and if the first power is equal to the power required by the load, the centralized control unit controls the flywheel energy storage unit to stand by.
10. The control method of the hybrid power supply system according to claim 9, wherein the charging power of the flywheel energy storage unit is not greater than the lower limit value of the first power.
11. The method for controlling the hybrid power supply system according to claim 10, wherein the discharging power of the flywheel energy storage unit is not greater than an upper limit value of a difference between a peak power value required by a load and the first power.
12. The control method of the hybrid power supply system according to claim 11, wherein the lower limit value of the first power is larger than an upper limit value of a difference between the peak value of the power required by the load and the first power.
13. The control method of the hybrid power supply system according to claim 9, characterized by further comprising:
when the power required by the load is equal to zero, judging whether the sum of the residual electric quantity of the flywheel energy storage unit and the maximum value of the actual charging electric quantity is smaller than the rated electric quantity of the flywheel energy storage unit, if so, enabling the hybrid power supply system to enter a next pulse load required power loading period, otherwise, starting a direct current resistor to consume the residual electric quantity, and enabling the hybrid power supply system to enter the next pulse load required power loading period until the sum of the residual electric quantity of the flywheel energy storage unit and the maximum value of the actual charging electric quantity is equal to the rated electric quantity of the flywheel energy storage unit.
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| CN115603304A (en) * | 2022-11-30 | 2023-01-13 | 沈阳微控新能源技术有限公司（Cn） | Generator pulse power supply system based on flywheel energy storage and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953345A (en) * | 2017-04-25 | 2017-07-14 | 山东大学 | There are the micro-capacitance sensor operation method and micro-grid system of impact load and flywheel energy storage |
| CN110676490A (en) * | 2019-10-14 | 2020-01-10 | 上海氢润新能源科技有限公司 | High-integration low-power hydrogen fuel cell management system |
| CN111361434A (en) * | 2019-12-18 | 2020-07-03 | 山东明宇新能源技术有限公司 | Power system for hydrogen fuel cell passenger car |
-
2022
- 2022-06-10 CN CN202210650061.7A patent/CN114759541B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953345A (en) * | 2017-04-25 | 2017-07-14 | 山东大学 | There are the micro-capacitance sensor operation method and micro-grid system of impact load and flywheel energy storage |
| CN110676490A (en) * | 2019-10-14 | 2020-01-10 | 上海氢润新能源科技有限公司 | High-integration low-power hydrogen fuel cell management system |
| CN111361434A (en) * | 2019-12-18 | 2020-07-03 | 山东明宇新能源技术有限公司 | Power system for hydrogen fuel cell passenger car |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115603304A (en) * | 2022-11-30 | 2023-01-13 | 沈阳微控新能源技术有限公司（Cn） | Generator pulse power supply system based on flywheel energy storage and control method thereof |
| CN115603304B (en) * | 2022-11-30 | 2023-03-14 | 沈阳微控新能源技术有限公司 | Generator pulse power supply system based on flywheel energy storage and control method thereof |
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