Energy storage and hydrogen production combined supply system and coupling control method thereof, storage medium

Abstract

The application discloses an energy storage and hydrogen production combined system and a coupling control method and a storage medium thereof. The coupling control method comprises the following steps: receiving a scheduling signal; and adjusting a first operating power of an energy storage device and / or a second operating power of a hydrogen production device according to the scheduling signal, so that the sum of the first operating power and the second operating power is equal to a target power indicated by the scheduling signal. Through the application, the service life of the device can be prolonged while providing power auxiliary services, the power consumption cost during charging and hydrogen production is low, the new energy power abandonment can be reduced, and the deployment of the energy storage and hydrogen production combined system is flexible.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power assistance and energy storage coupled hydrogen production, in particular to an energy storage and hydrogen production combined system and a coupling control method thereof, and a storage medium. BACKGROUND

[0002] With the development of clean energy and the low-carbon transformation of energy, the installed capacity of new energy power generation such as photovoltaic power generation and wind power generation is rapidly increasing. However, photovoltaic power generation and wind power generation both have volatility and intermittency problems, which bring challenges to the safe and reliable operation of the power system, resulting in the need for more peak shaving and frequency modulation auxiliary services for the daily power grid.

[0003] On the other hand, in order to ensure that clean energy in the northwest region can be effectively transmitted to the developed eastern region, China has built many ultra-high voltage power transmission projects for west-to-east power transmission. The ultra-high voltage direct current power transmission project leads to a decrease in the power rotational inertia in the power system, and the operation mode of the power system is more complex. Therefore, the promotion and application of new energy power generation technologies such as photovoltaic power generation and wind power generation, as well as the rapid development of ultra-high voltage direct current power transmission projects, have led to a significant increase in the demand for frequency modulation of the power system. Power frequency stability is of great value to the safe and reliable operation of the power system.

[0004] Currently, the power frequency modulation and peak shaving services of the power grid mainly rely on thermal power generating units and hydroelectric generating units. However, the frequency modulation process of thermal power generating units has problems such as poor unit regulation performance, high regulation cost, and high pollution emissions, resulting in poor enthusiasm of thermal power units for participating in frequency modulation auxiliary services. Hydroelectric generating units are mainly located in the southwest region and can only serve the power system operation in the southwest region.

[0005] At present, lithium battery energy storage assisting thermal power units to provide frequency modulation auxiliary services is in a rapid development stage. However, the characteristics of the frequency modulation signal require lithium battery energy storage to be frequently charged and discharged when participating in frequency modulation auxiliary services, causing rapid performance degradation of the battery and serious damage to the battery life. Moreover, lithium battery energy storage must rely on power plant layout, which has great limitations and many restrictions in deployment.

[0006] In summary, the existing energy storage power station has a rapid performance degradation and high cost when participating in power peak shaving and frequency modulation auxiliary services. SUMMARY

[0007] The technical problem solved by the present application is how to prolong the service life of the equipment while providing power assistance services.

[0008] To solve the above technical problems, the coupling control method of the energy storage and hydrogen production combined system provided by the embodiment of the present application comprises the following steps: receiving a scheduling signal; and adjusting a first operating power of an energy storage device and / or a second operating power of a hydrogen production device according to at least the scheduling signal, so that the sum of the first operating power and the second operating power is equal to a target power indicated by the scheduling signal.

[0009] Optionally, the scheduling signal is a peak regulation signal, and the step of adjusting the first operating power of the energy storage device and / or the second operating power of the hydrogen production device according to at least the scheduling signal comprises the following steps: adjusting the first operating power and / or the second operating power according to the peak regulation signal, a time period to which a current time belongs, and a peak regulation benefit.

[0010] Optionally, the step of adjusting the first operating power and / or the second operating power according to the peak regulation signal, the time period to which the current time belongs, and the peak regulation benefit comprises the following steps: determining a joint operating time period according to the peak regulation benefit; if the current time belongs to the joint operating time period, adjusting the first operating power and the second operating power according to the target power distribution; and if the current time does not belong to the joint operating time period, adjusting the first operating power according to the target power.

[0011] Optionally, the step of determining the joint operating time period according to the peak regulation benefit comprises the following step: the greater the peak regulation benefit is, the longer the joint operating time period is.

[0012] Optionally, the lower limit of a preset operating power range of the energy storage device in the joint operating time period is determined according to the amount of electricity transferred by the energy storage device in a non-joint operating time period in response to the peak regulation signal.

[0013] Optionally, the coupling control method further comprises the following steps: when the joint operating time period is left for a first preset time length, detecting the state of charge of the energy storage device; and if the state of charge of the energy storage device is greater than a first preset threshold, increasing the second operating power.

[0014] Optionally, the coupling control method further comprises the following steps: if the second operating power of the hydrogen production device has been increased to the upper limit of the preset operating power range, controlling the hydrogen production device to continue operating to consume the amount of electricity of the energy storage device after the joint operating time period ends.

[0015] Optionally, the scheduling signal is a frequency regulation signal, and the step of adjusting the first operating power of the energy storage device and / or the second operating power of the hydrogen production device according to at least the scheduling signal comprises the following steps: adjusting the first operating power and / or the second operating power according to the frequency regulation signal, a time period to which a current time belongs, and the state of charge of the energy storage device.

[0016] Optionally, the adjusting the first operation power and / or the second operation power according to the frequency modulation signal, the time period in which the current time belongs to, and the state of charge of the energy storage device comprises: determining a joint operation period according to the state of charge of the energy storage device; if the current time belongs to the joint operation period, adjusting the first operation power and the second operation power according to the target power distribution; and if the current time does not belong to the joint operation period, adjusting the first operation power according to the target power.

[0017] Optionally, the upper limit of the preset operation power range of the energy storage device in the joint operation period is determined according to the amount of electricity transferred by the energy storage device in the non-joint operation period in response to the frequency modulation signal.

[0018] Optionally, the coupling control method further comprises: detecting the state of charge of the energy storage device when the current time is less than a second preset time length from the end of the valley electricity price period; and if the state of charge of the energy storage device is less than a second preset threshold, adjusting the distribution order so that the distribution order of the energy storage device is prior to that of the hydrogen production device.

[0019] Optionally, the determining the joint operation period according to the state of charge of the energy storage device comprises: the greater the change in the state of charge of the energy storage device, the longer the joint operation period.

[0020] Optionally, the joint operation period covers at least the valley electricity price period.

[0021] Optionally, a first start time of the joint operation period is earlier than a second start time of the valley electricity price period, and a time deviation between the first start time and the second start time is determined according to a time required for the hydrogen production device to consume the state of charge of the energy storage device to a preset state of charge.

[0022] Optionally, if the current time belongs to the joint operation period, adjusting the first operation power and the second operation power according to the target power distribution comprises: if the current time belongs to the joint operation period, determining a distribution order according to the electricity price period to which the joint operation period belongs; adjusting the operation power of a device in front of the distribution order according to the target power; if the target power exceeds a preset operation power range of the operation power of the device in front of the distribution order, adjusting the operation power of a device behind the distribution order according to the excess part; or if the power of the device in front of the distribution order reaches an upper limit of the preset operation power range, adjusting the operation power of the device behind the distribution order according to the target power.

[0023] Optionally, when the scheduling signal is a frequency modulation signal, the adjusting the first operating power and the second operating power according to the target power further comprises: when the allocation sequence is the energy storage device prior to the hydrogen production device, and the variation of the target power is greater than the preset shallow charging and discharging range of the energy storage device, the target power is proportionally allocated to the first operating power and the second operating power.

[0024] Optionally, the determining the allocation sequence according to the power pricing period to which the joint operation period belongs comprises: when the power pricing period to which the joint operation period belongs is a valley power pricing period, determining that the allocation sequence is the hydrogen production device prior to the energy storage device; and when the power pricing period to which the joint operation period belongs is a non-valley power pricing period, determining that the allocation sequence is the energy storage device prior to the hydrogen production device.

[0025] Optionally, the power pricing periods to which the joint operation period belongs are different, and the preset operating power ranges of the hydrogen production device are different.

[0026] Optionally, the coupling control method further comprises: during a period when no scheduling signal is received, adjusting the first operating power and the second operating power according to a standby state.

[0027] Optionally, the second operating power of the hydrogen production device in the standby state is determined according to a period to which a current time belongs and a preset operating power range.

[0028] Optionally, the standby state of the energy storage device is a standby state, or the first operating power of the energy storage device in the standby state is determined according to a scheduling signal, a period to which a current time belongs and a preset operating power range.

[0029] Optionally, during a period when no scheduling signal is received, energy of the hydrogen production device operating in the standby state is obtained from the energy storage device.

[0030] Optionally, before receiving the scheduling signal, the coupling control method further comprises: determining a service type participating in a dispatching service in a current operation cycle according to historical data; and calculating an assistable power in the current operation cycle according to the determined service type and reporting the assistable power.

[0031] Optionally, the historical data comprises income data of participating in a dispatching service in the past.

[0032] Optionally, the assistable power is determined according to a power variation, wherein the power variation is a difference between an operating power of a device participating in a dispatching service in a standby state and a boundary of a preset operating power range.

[0033] To solve the above technical problems, the embodiment of the present application also provides a storage and hydrogen production combined system, comprising: a storage device for converting alternating current into direct current and storing; a hydrogen production device for preparing hydrogen by using electric energy; and a control module coupled with the storage device and the hydrogen production device respectively, wherein the control module is used to execute the coupling control method to adjust a first operating power of the storage device and a second operating power of the hydrogen production device according to at least the received scheduling signal.

[0034] Optionally, the storage and hydrogen production combined system further comprises a charging module coupled with the storage device to output the electric quantity stored in the storage device.

[0035] Optionally, the storage and hydrogen production combined system further comprises a hydrogenation module coupled with the hydrogen production device to output the hydrogen prepared by the hydrogen production device.

[0036] To solve the above technical problems, the embodiment of the present application also provides a storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to perform the steps of the above method.

[0037] Compared with the prior art, the technical scheme of the embodiment of the present application has the following beneficial effects:

[0038] The embodiment of the present application provides a coupling control method of a storage and hydrogen production combined system, comprising: receiving a scheduling signal; and adjusting a first operating power of a storage device and / or a second operating power of a hydrogen production device according to at least the scheduling signal, so that the sum of the first operating power and the second operating power is equal to a target power indicated by the scheduling signal.

[0039] Compared with the many defects of the prior art in providing power frequency modulation and peak shaving auxiliary services, the embodiment can prolong the service life of the device while providing power auxiliary services, and the power consumption cost during charging and hydrogen production is low, and the new energy power abandonment can be reduced, and the deployment of the storage and hydrogen production combined system is flexible.

[0040] Specifically, the storage device and the hydrogen production device jointly respond to the scheduling signal, and the scheduling signal is reasonably distributed to the two devices, which is beneficial to prolong the service life of the device while providing power auxiliary services and improve the asset life cycle utilization rate. In view of the technical problems that the existing storage power station alone participates in the power peak shaving and frequency modulation auxiliary service process and the performance decays too fast and the investment cost is high, the embodiment utilizes the advantages of long service life of the hydrogen production device and high-purity hydrogen product, and delays the problem of rapid performance decay of the battery storage device caused by frequent adjustment of charging and discharging power in the process of participating in the power frequency modulation and peak shaving auxiliary service by coupling control of the two devices, so that the service life of the storage device is delayed.

[0041] Further, in view of the technical problem that the hydrogen production equipment is difficult to participate in the power auxiliary service alone in the existing power auxiliary service market rules, and the user side is difficult to commercialize the operation of the hydrogen production equipment due to the high electricity cost caused by the implementation of the commercial and industrial electricity price system, the embodiment participates in the power auxiliary service in response to the dispatching signal, thereby reducing the power consumption cost during charging and hydrogen production by using the power frequency modulation and peak shaving auxiliary income of the energy storage equipment and the hydrogen production equipment.

[0042] Further, photovoltaic power generation and wind power generation have the characteristics of power generation fluctuation and interval, which has a great impact on the power grid. The embodiment provides power frequency modulation and peak shaving auxiliary services by coupling control of the energy storage equipment and the hydrogen production equipment, so as to indirectly promote new energy consumption and reduce new energy curtailment.

[0043] The embodiment of the present application also provides an energy storage and hydrogen production combined system, comprising: an energy storage equipment for converting alternating current into direct current and storing; a hydrogen production equipment for preparing hydrogen by using electric energy; and a control module coupled with the energy storage equipment and the hydrogen production equipment, respectively, wherein the control module is configured to execute the coupling control method to adjust a first operating power of the energy storage equipment and a second operating power of the hydrogen production equipment according to the received dispatching signal.

[0044] The energy storage and hydrogen production combined system can provide power frequency modulation auxiliary services and power peak shaving auxiliary services, not only reducing the power consumption cost of the charging and hydrogen production equipment by using the power auxiliary service income of the energy storage equipment and the hydrogen production equipment, but also delaying the capacity attenuation of the battery energy storage and improving the asset utilization rate of the equipment by coupling control of the energy storage and hydrogen production equipment.

[0045] Further, the energy storage and hydrogen production combined system can be flexibly deployed according to user needs, and can be independently set up from the power grid, such as being flexibly deployed outside the power plant. Thus, the energy storage and hydrogen production combined system can be independently operated in the suburban areas of eastern cities, effectively solving the bottleneck problem of relying on the construction of thermal power plants or new energy power plants to build energy storage and hydrogen production equipment.

[0046] Further, the energy storage of the energy storage equipment can be used to provide charging services for new energy vehicles.

[0047] Further, since the thermal power plant is far away from the city, the hydrogen produced by the existing hydrogen production equipment installed in the thermal power plant needs to be transported to the hydrogen refueling station in the city, and the transportation cost of hydrogen is high. The energy storage and hydrogen production combined supply system described in the embodiment can be flexibly and independently deployed, so that the hydrogen produced by the hydrogen production equipment can be directly used to provide hydrogen refueling services for new energy vehicles without long-distance transportation. Therefore, considering that the transportation cost of hydrogen is much higher than the cost of power transmission, the embodiment effectively reduces the transportation cost of hydrogen by replacing hydrogen transmission with power transmission. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 is a schematic diagram of an energy storage and hydrogen production combined supply system according to an embodiment of the application;

[0049] Figure 2 is a flowchart of a coupling control method of an energy storage and hydrogen production combined supply system according to an embodiment of the application;

[0050] Figure 3 is Figure 1 is an information connection block diagram of an energy storage and hydrogen production combined supply system;

[0051] Figure 4 is Figure 2 is a flowchart of a first specific implementation of step S102 in

[0052] Figure 5 is Figure 2 is a flowchart of a second specific implementation of step S102 in DETAILED DESCRIPTION

[0053] As described in the background, the existing energy storage power station has a rapid performance decay and high cost in participating in power peak regulation and frequency modulation auxiliary services.

[0054] The inventors have found that, in addition to battery energy storage power stations, water electrolysis hydrogen production equipment also has good regulation performance and is a high-quality supply resource for power frequency modulation and peak regulation auxiliary services. However, at the present stage, there is no technology for water electrolysis hydrogen production equipment to assist wind power generation and photovoltaic power generation. Moreover, it is difficult for hydrogen production equipment to participate in power auxiliary services alone in the Chinese power auxiliary service market rules. In addition, the user side needs to implement industrial and commercial electricity price systems when setting up hydrogen production equipment alone, resulting in high electricity cost and difficulty in commercial operation.

[0055] At present, there is no project and technology for battery energy storage and water electrolysis hydrogen production to jointly provide power frequency modulation and peak regulation auxiliary services.

[0056] To solve the above technical problems, the embodiment of the present application provides a coupling control method of an energy storage and hydrogen production combined system, comprising: receiving a scheduling signal; and adjusting a first operating power of an energy storage device and / or a second operating power of a hydrogen production device according to at least the scheduling signal, so that the sum of the first operating power and the second operating power is equal to a target power indicated by the scheduling signal.

[0057] The embodiment can prolong the service life of the device while providing power auxiliary services, and the power consumption cost during charging and hydrogen production is low, and the new energy curtailment can be reduced, and the deployment of the energy storage and hydrogen production combined system is flexible.

[0058] Specifically, the energy storage device and the hydrogen production device jointly respond to the scheduling signal, and the scheduling signal is reasonably distributed to the two devices, which is beneficial to prolong the service life of the device while providing power auxiliary services and improve the asset life cycle utilization rate. In view of the technical problems that the existing energy storage power station alone participates in the power peak shaving and frequency modulation auxiliary service process, the performance decays too fast and the investment cost is high, the embodiment utilizes the advantages of long service life of the hydrogen production device and high-purity hydrogen product, and delays the service life of the energy storage device by coupling control of the two devices to delay the service life of the energy storage device caused by frequent adjustment of the charging and discharging power in the process of participating in the power frequency modulation and peak shaving auxiliary service.

[0059] Further, in view of the technical problems that the hydrogen production device is difficult to participate in the power auxiliary service alone in the existing power auxiliary service market rules, and the user side is difficult to commercialize the operation of the hydrogen production device alone due to the high power consumption cost caused by the implementation of the industrial and commercial electricity price system. The embodiment participates in the power auxiliary service by responding to the scheduling signal, so as to utilize the power frequency modulation and peak shaving auxiliary income of the energy storage device and the hydrogen production device for energy storage and hydrogen production, and reduce the power consumption cost during charging and hydrogen production.

[0060] Further, the embodiment provides the power frequency modulation and peak shaving auxiliary service by coupling control of the energy storage device and the hydrogen production device, which can indirectly promote the new energy consumption and reduce the new energy curtailment.

[0061] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0062] Figure 1 is a schematic diagram of an energy storage and hydrogen production combined system according to an embodiment of the present application.

[0063] Specifically, referring to Figure 1 , the energy storage and hydrogen production combined system 100 described in the embodiment can comprise an energy storage device 110, which is used to convert alternating current into direct current and store.

[0064] Further, the energy storage device 110 can be connected to a power grid (not shown) on the user side to convert and store power from the power grid. For example, the energy storage and hydrogen production combined system 100 can include a transformer 140, one end of which is coupled to the power grid and the other end of which is coupled to an AC bus, and the transformer 140 is used to convert high-voltage AC power (which can be measured in kilovolts, abbreviated as KV) from the power grid into low-voltage AC power (which can be measured in volts, abbreviated as V). In one example, the voltage value of the high-voltage AC power is 10 KV, and the voltage value of the low-voltage AC power is 400 V. The energy storage device 110 is coupled to the 400 V AC bus to further convert the low-voltage AC power converted by the transformer 140 into DC power and store it.

[0065] In one implementation, the energy storage device 110 can include a first inverter 111 for converting low-voltage AC power (such as 400 V) into DC power, and an energy storage module coupled to the first inverter 111 to store the DC power converted by the first inverter 111.

[0066] Specifically, the first inverter 111 can also be referred to as an energy storage inverter, and the energy storage module can include a battery cabin 112 and a corresponding battery management system. The first inverter 111 can be a bidirectional inverter to control the battery management system of the battery cabin 112 to perform charging and discharging operations.

[0067] For example, when providing power frequency modulation auxiliary services to the power grid, according to the direction and length of the frequency modulation signal issued by the power grid, the bidirectional inverter can be used to supply power from the battery cabin 112 to the power grid in the opposite direction. For another example, when providing power peak shaving auxiliary services to the power grid, the charging operation is usually performed by the bidirectional inverter, that is, the power from the power grid is obtained and stored in the battery cabin 112.

[0068] Further, the battery cabin 112 can include one or more sections of coupled storage batteries. Multiple sections of storage batteries can form a battery cluster.

[0069] In one implementation, the energy storage and hydrogen production combined system 100 can further include a charging module 150 coupled to the energy storage device 110 to output the power stored in the energy storage device 110 to the outside.

[0070] Specifically, the charging module 150 can include a DC controller 151 and a DC charging pile 152 coupled to each other. The DC charging pile 152 is coupled to the DC side of the first inverter 111 to supply the DC power converted by the first inverter 111 to electric vehicle charging under the control of the DC controller 151. Further, the DC controller 151 can adjust the power of the electric vehicle charging by the DC charging pile 152 according to user instructions.

[0071] The DC charging pile 152 is coupled to the DC side of the first inverter 111, which has the advantages of reducing control difficulty and avoiding the influence of charging operation on other devices coupled to the 400V AC bus.

[0072] Further, when charging the electric vehicle, the control signals of the first inverter 111 and the DC charging pile 152 are communicated to enable the battery management system of the battery cabin 112 to be jointly controlled, so that the first inverter 111 and the DC charging pile 152 can both achieve the required control power. For example, the sum of the power P1 of the first inverter 111 and the power P2 of the DC charging pile 152 is equal to the execution power P3 of the battery management system of the battery cabin 112. The first inverter 111 can be the master control device, and the DC controller 151 can be the auxiliary control device. The control signal of the DC controller 151 is transmitted to the first inverter 111, and then the first inverter 111 issues the control signal to the battery management system.

[0073] Further, the electric energy of the DC charging pile 152 can be obtained from the battery cabin 112.

[0074] The energy storage device 110 and the charging module 150 can be collectively referred to as the energy storage side system of the energy storage and hydrogen production combined supply system 100, which is used to store energy by using grid power and provide charging services for electric vehicles, and can also participate in power frequency modulation and peak shaving auxiliary services.

[0075] In a specific implementation, the energy storage and hydrogen production combined supply system 100 can further include a hydrogen production device 120 for preparing hydrogen gas by using electric energy.

[0076] Specifically, the hydrogen production device 120 can be connected to the grid as a user side to perform hydrogen production operation by using the electric energy of the grid. For example, the hydrogen production device 120 is coupled to the 400V AC bus to obtain low-voltage AC power converted by the transformer 140.

[0077] Further, the hydrogen production device 120 can include a second inverter 121 coupled to the 400V AC bus to convert low-voltage AC power into DC power. For example, the second inverter 121 can be a unidirectional inverter.

[0078] Further, the hydrogen production device 120 can include a hydrogen production electrolysis device 122 for electrolyzing electrolyte into oxygen and hydrogen by using the DC power converted by the second inverter 121. For example, the electrolyte can include water, and can also include water added with electrolyte.

[0079] The second inverter 121 controls the operating power of the hydrogen production electrolysis device 122.

[0080] The oxygen and hydrogen prepared by the hydrogen production electrolysis device 122 are separated into hydrogen and oxygen by the air separation device 123, and after drying and pressurization by the purification facility, are respectively stored in the hydrogen storage tank 124 and the oxygen storage tank 125.

[0081] The oxygen storage tank 125 can sell high-purity oxygen in the form of an oxygen tank.

[0082] In a specific implementation, the energy storage and hydrogen production combined supply system 100 can further include a hydrogen refueling module 160 coupled to the hydrogen production device 120 to output the hydrogen prepared by the hydrogen production device 120.

[0083] For example, the hydrogen refueling module 160 can include a compressor connected to the hydrogen storage tank 124 and a hydrogen refueling gun to which the hydrogen is delivered, thereby providing hydrogen refueling flow for hydrogen energy vehicles.

[0084] Further, the hydrogen refueling machine can be controlled in combination with the pressure in the hydrogen storage tank 124 according to the operation requirements of the grid dispatch of the energy storage and hydrogen production combined supply system 100.

[0085] Further, the operation state of the hydrogen production device 120 and the energy storage device 110 can also be adjusted in emergency according to the pressure of the hydrogen storage tank 124 and the state of the hydrogen refueling machine, to ensure sufficient hydrogen energy to meet the hydrogen refueling demand of hydrogen energy vehicles.

[0086] Further, the hydrogen refueling module 160 does not affect the operation power of the hydrogen production device 120 when refueling hydrogen energy vehicles. Specifically, the hydrogen for hydrogen energy vehicle refueling comes from the hydrogen storage tank 124, and there is no need for real-time associated control between the hydrogen storage tank 124 and the hydrogen production device 120. Only when the hydrogen storage tank 124 is full, the hydrogen production device 120 needs to be shut down. Or when the hydrogen in the hydrogen storage tank 124 is insufficient for hydrogen energy vehicle refueling, the hydrogen production power of the hydrogen production device 120 needs to be increased to increase the hydrogen production.

[0087] The hydrogen production device 120 and the hydrogen refueling module 160 can be collectively referred to as the hydrogen production side system of the energy storage and hydrogen production combined supply system 100, for realizing hydrogen production by using grid power, providing charging services for hydrogen energy vehicles, and being able to participate in power frequency modulation, peak regulation auxiliary services.

[0088] In a specific implementation, the energy storage and hydrogen production combined supply system 100 can further include a meter 170 coupled between the transformer 140 and the 400V AC bus. The energy storage and hydrogen production combined supply system 100 is based on the meter 170 to count the electricity consumption of the whole station, that is, the meter 170 is the basis for the energy storage and hydrogen production combined supply system 100 to settle electricity charges with the grid.

[0089] In an embodiment, the energy storage and hydrogen production combined system 100 can further comprise a control module 130 coupled with the energy storage device 110 and the hydrogen production device 120, respectively, which can be configured to perform Figure 2 The coupling control method is configured to adjust the first operating power of the energy storage device 110 and the second operating power of the hydrogen production device 120 based on the received dispatch signal.

[0090] In the embodiment, the first operating power of the energy storage device 110 can be characterized by the operating power of the first inverter 111, and the second operating power of the hydrogen production device 120 can be characterized by the operating power of the second inverter 121.

[0091] Specifically, the energy storage and hydrogen production combined system 100 can invoke the control module 130 to perform device dispatch control management functions.

[0092] For example, in combination with Figure 1 and Figure 3 The control module 130 can receive a dispatch signal from a power grid dispatch center (not shown) and transmit the dispatch signal to a dispatch signal data transmission unit 131, and convert the dispatch signal into charging or discharging control instructions for the energy storage device 110 and hydrogen production power control instructions for the hydrogen production device 120. Further, the operating states of the energy storage device 110 and the hydrogen production device 120 can be dynamically optimized according to their states, so that the operating powers of the first inverter 111 and the second inverter 121 can meet the requirements of the dispatch signal, thereby obtaining power auxiliary service benefits.

[0093] Further, the dispatch signal can be a frequency modulation signal or a peak shaving signal.

[0094] In an embodiment, the control module 130 can be integrated into a station-level device control server of the energy storage and hydrogen production combined system 100, which can serve as a total control terminal of the system to control the daily operation of various devices and modules in the system.

[0095] Specifically, the control module 130 can be installed in the station-level device control server in the form of software.

[0096] Further, the control module 130 can have functions of power auxiliary service transaction settlement management, device dispatch control management, device operation and maintenance management, charging and hydrogen filling service management, and asset benefit statistical analysis. Each function can be integrated into the control module 130 in the form of an independent unit module.

[0097] The service transaction settlement management function can be a frequency modulation or peak shaving auxiliary service bidding transaction and transaction settlement management to the power auxiliary service market according to the states of the energy storage device 110 and the hydrogen production device 120.

[0098] The device operation and maintenance management function can monitor the operating state of various devices in the energy storage and hydrogen production combined supply system 100, so as to discover device abnormalities in time and issue fault alarms and safety alarms. Further, maintenance and repair operation plans can also be formulated according to the device state to ensure that the device maintains a good state.

[0099] In one specific implementation, when monitoring the operating state of various devices in the energy storage and hydrogen production combined supply system 100, the required device data that can be collected can include data collected by sensing devices such as temperature sensors, combustible gas sensors, smoke alarms, battery pressure relief valve sensors, battery internal resistance detection devices, and battery cluster current sensors arranged in the battery cabin 112 and the hydrogen production device 120.

[0100] For example, the temperature of the battery and the hydrogen production device 120 is denoted as T, and its value range is [-30℃, 200℃].

[0101] The combustible gas signal emitted by the combustible gas sensor is denoted as X2, and its value is 0 or 1, where 0 represents no action and 1 represents action.

[0102] The smoke alarm signal emitted by the smoke alarm is denoted as S1, and its value is 0 or 1, where 0 represents no action and 1 represents action.

[0103] The battery pressure relief valve signal emitted by the battery pressure relief valve sensor is denoted as X1, and its value is 0 or 1, where 0 represents no action and 1 represents action.

[0104] The battery internal resistance detected by the battery internal resistance detection device is denoted as R, and its value range is [0mΩ, 500mΩ].

[0105] The battery cluster current emitted by the battery cluster current sensor is denoted as I1, and its value is affected by factors such as the type, number, series-parallel connection of the battery in the battery cluster, and its value range is [-Imax, Imax].

[0106] Based on the present embodiment, the device operation and maintenance management function can identify high-risk states of the energy storage device 110 and the hydrogen production device 120 in advance. Specifically, the high-risk states of the energy storage device 110 can include high battery voltage, low battery voltage, large battery internal resistance, high battery temperature, and low battery temperature. Further, the high-risk states of the hydrogen production device 120 can include hydrogen leakage, alkali liquid circulating pump failure, substandard dew point temperature, and rectifier cabinet failure.

[0107] The control module 130 can include a fault warning unit (not shown in the figure) for identifying a high-risk state of the equipment and issuing a fault warning signal to remind the operation and maintenance personnel to perform equipment maintenance operations. Thus, based on the equipment operation and maintenance management function, the operation and maintenance personnel in the energy storage and hydrogen production combined supply system 100 can accurately locate the number and abnormal index parameters of the equipment with high risks even if they find energy storage equipment 110 and hydrogen production equipment 120 with high safety or high risk states.

[0108] Table 1

[0109]

[0110] Table 1 exemplarily shows part of the types of fault warnings and preventive maintenance operation measures of the energy storage equipment 110 in the energy storage and hydrogen production combined supply system 100.

[0111] Table 2

[0112]

[0113] Table 2 exemplarily shows part of the types of fault warnings and preventive maintenance operation measures of the hydrogen production equipment 120 in the energy storage and hydrogen production combined supply system 100.

[0114] Based on the present embodiment, the control module 130 can view the running parameters, fault warning types, and equipment fault reasons of the energy storage equipment 110 and the hydrogen production equipment 120 based on the equipment operation and maintenance management function, thereby assisting the operation and maintenance personnel in performing equipment maintenance operations. In addition, the operation and maintenance personnel can query historical operation and maintenance records and maintenance personnel records, facilitating work management and assessment.

[0115] The charging and hydrogenation business management function can serve electric vehicle charging business and hydrogen energy vehicle hydrogenation business. The charging and hydrogenation business management function can include sub-functions such as payment, control of charging or hydrogenation guns, and income statistics.

[0116] In a specific implementation, the manager of the direct current charging pile 152 and the hydrogenation gun 160 can be provided with a charging and hydrogenation business management touch screen (not shown in the figure).

[0117] Specifically, after the new energy vehicle user inserts the charging gun of the direct current charging pile 152 and / or the hydrogenation gun on the vehicle, the energy storage and hydrogen production combined supply system 100 enters a supplyable state. Further, the user can activate the corresponding equipment (i.e., the connected charging gun and / or hydrogenation gun) by using a recharge card and then input a charging and hydrogenation control mode.

[0118] For example, the charging and hydrogenation control mode input by the user can include charging input data such as charging amount and charging time length.

[0119] For example, the user inputted charging and hydrogenation control mode can also include hydrogenation input data, such as hydrogenation amount.

[0120] Further, after the charging and hydrogenation are completed, the charging and hydrogenation service management touch screen displays the amount of this transaction and the charging amount / hydrogenation amount.

[0121] The asset income statistical analysis function can analyze the frequency regulation income and peak regulation income, charging service income, hydrogenation service income, electricity expenditure, and operation and maintenance expenditure of the energy storage and hydrogen production combined system 100, so as to statistically analyze the investment income of the energy storage and hydrogen production combined system 100. For example, the control module 130 can statistically analyze the inflow and outflow of cash flow on a daily and monthly basis, facilitating the management of the equipment in the station by the operation personnel of the energy storage and hydrogen production combined system 100.

[0122] The control module 130 can communicate with Figure 1 The devices and modules shown can communicate with each other to perform the above functions.

[0123] In one embodiment, the energy storage and hydrogen production combined system 100 can further include auxiliary equipment such as fire-fighting and air conditioning.

[0124] In this embodiment, the energy storage and hydrogen production combined system 100 can participate in the power auxiliary service of the power grid as a user side. Specifically, since the energy storage and hydrogen production combined system 100 can be set up independently of the power grid, such as independently of the power plant, it does not need to coordinate with the operation state of the power source such as the power plant, but only considers the cooperation between the energy storage device 110 and the hydrogen production device 120 to respond to the dispatching signal.

[0125] The power auxiliary service can include frequency regulation auxiliary service, peak regulation auxiliary service, and standby auxiliary service. The control module 130 can determine the dispatchable capacity and time period according to the state of the energy storage device 110 and the hydrogen production device 120, and bid for the determined dispatchable capacity and time period, as well as the frequency regulation mileage price and the peak regulation electricity price in the power auxiliary service market. Correspondingly, the power auxiliary service market determines the list of suppliers to be called by ranking the suppliers according to the market demand.

[0126] Further, the control module 130 can implement a service transaction settlement management function to determine the dispatching time period and transaction price of the energy storage device 110 and the hydrogen production device 120 on the next day according to the market transaction, and statistically calculate the daily regulation income of the energy storage device 110 and the hydrogen production device 120 for performing the power auxiliary service.

[0127] Further, the dispatchable capacity of the energy storage device 110 and the hydrogen production device 120 can be dynamically changed according to the electricity price level. In a typical application scenario, the operation time period of the energy storage device 110 and the hydrogen production device 120 can be divided into a valley electricity price period and a peak / flat electricity price period (also referred to as a peak electricity price period and a flat electricity price period). For example, it is assumed that the valley electricity price period of a certain region is 23:00-7:00 of the next day, and the peak electricity price and flat electricity price period is 7:00-23:00. In the power auxiliary service mode, the adjustable power range of the energy storage device 110 is [-energy storage rated power P es , +energy storage rated power P es ], and the state of charge (SOC) range of the energy storage device 110 is [10% energy storage rated capacity E es , 90% energy storage rated capacity E es ]. The adjustable power range of the hydrogen production device 120 is [20% hydrogen production rated power P h , 110% hydrogen production rated power P h ], and the capacity range of the hydrogen storage tank 124 is [0% tank rated capacity, 100% tank rated capacity].

[0128] In a specific implementation, the frequency modulation auxiliary service and the peak regulation auxiliary service are two mutually exclusive services, that is, the energy storage and hydrogen production combined supply system 100 can only participate in one auxiliary service at a certain time period within a day.

[0129] Specifically, the service transaction settlement management function of the control module 130 can include the bidding transaction and settlement service function of the power frequency modulation auxiliary service and the power peak regulation auxiliary service. The operator of the energy storage and hydrogen production combined supply system 100 can determine the type and market price of the power auxiliary service provided by the energy storage and hydrogen production combined supply system 100 according to the income of the power auxiliary service market, with the goal of maximizing the income.

[0130] Next, the specific process in which the energy storage and hydrogen production combined supply system 100 responds to the dispatch signal to provide power auxiliary service will be described in detail. Figure 2

[0131] Specifically, referring to Figure 2 , the coupling control method of the energy storage and hydrogen production combined supply system 100 in this embodiment can include the following steps:

[0132] Step S101, receiving a dispatch signal;

[0133] Step S102, adjusting a first operating power of an energy storage device and / or a second operating power of a hydrogen production device according to at least the dispatch signal, so that the sum of the first operating power and the second operating power is equal to a target power indicated by the dispatch signal.​

[0134] In a typical application scenario, the device regulation management function of the control module 130 can be that the dispatch signal data transmission unit 131 receives a dispatch signal issued by the power grid dispatch. Further, the control module 130 decomposes the dispatch signal according to the states of the energy storage device 110 and the hydrogen production device 120, so that the combined power regulation value of the two devices is equal to the power value indicated by the dispatch signal.

[0135] In the step S102, the power change value of the energy storage device 110 and the hydrogen production device 120 in the coupled operation mode can be the same as the target power indicated by the dispatch signal. That is, the coupled control method of the present embodiment can satisfy the formula ΔP fr (t) = ΔP es (t) + ΔP h (t), where ΔP fr (t) is the target power indicated by the dispatch signal, ΔP es (t) is the regulation power amount of the energy storage device 110 in response to the dispatch signal, and ΔP h (t) is the regulation power amount of the hydrogen production device 120 in response to the dispatch signal.

[0136] Next, the specific process of the step S102 will be described in detail taking the dispatch signal as a peak regulation signal as an example.

[0137] In a specific implementation, the step S102 can include the step of adjusting the first operating power and / or the second operating power according to the peak regulation signal, the time period to which the current time belongs, and the peak regulation benefit.

[0138] Specifically, referring to Figure 4 , the step S102 can further include the following steps:

[0139] Step S1021, determining a joint operation period according to the peak regulation benefit;

[0140] Step S1022, if the current time belongs to the joint operation period, adjusting the first operating power and the second operating power according to the target power distribution;

[0141] Step S1023, if the current time does not belong to the joint operation period, adjusting the first operating power according to the target power.

[0142] More specifically, in the step S1021, the longer the peak shaving benefit is, the longer the joint operation period is. Further, the joint operation period covers at least the valley electricity price period. For example, when the peak shaving benefit is low, the joint operation period can be the valley electricity price period. For another example, when the peak shaving benefit is high, the joint operation period can be the entire current operation cycle (i.e., all day).

[0143] Further, the joint operation period refers to a period in which the energy storage device 110 and the hydrogen production device 120 both participate in peak shaving auxiliary services. It should be noted that the participation of the energy storage device 110 and the hydrogen production device 120 in peak shaving auxiliary services in the embodiment refers to that the energy storage device 110 and the hydrogen production device 120 are at least in a to-be-dispatched state. Whether they jointly respond to a peak shaving signal depends on the target power of the currently received peak shaving signal.

[0144] The to-be-dispatched state refers to the operation state of the device when no dispatching signal is received from the power grid.

[0145] Further, the non-joint operation period refers to a period in which the hydrogen production device 120 does not work, such as a period in which the hydrogen production device 120 does not participate in peak shaving auxiliary services. In this period, the energy storage device 110 is mainly used to provide peak shaving auxiliary services.

[0146] It is considered that the hydrogen production device must be operated at a minimum of 20% rated power when it is on standby (i.e., in the to-be-dispatched state), which has a high power consumption cost. Therefore, when the peak shaving benefit is low, the energy storage device 110 is charged and the hydrogen production device 120 produces hydrogen as much as possible only when the electricity price is low (i.e., the valley electricity price period), and the hydrogen production device is on standby and does not respond when the electricity price is high (i.e., the flat electricity price period and the peak electricity price period). When the peak shaving compensation level is high, the hydrogen production device 120 can also respond when the electricity price is high.

[0147] In a typical application scenario, the energy storage device 110 and the hydrogen production device 120 are jointly operated only in the valley electricity price period, and only the energy storage device 110 is operated alone in the flat electricity price period and the peak electricity price period.

[0148] Specifically, during joint operation, the received peak shaving signal is distributed between the energy storage device 110 and the hydrogen production device 120.

[0149] Generally, the user-side resource peak shaving process is mainly to increase the power consumption. Accordingly, the control module 130 preferentially increases the second operation power of the hydrogen production device 120 according to the peak shaving signal. If the second operation power of the hydrogen production device 120 is increased to the upper limit of the preset operation power range and still does not reach the target power indicated by the peak shaving signal, the control module 130 further controls the energy storage device 110 to be charged to meet the user-side peak shaving demand.

[0150] In rare cases, the peak shaving requires the user to reduce the power consumption, in which case the control module 130 also reduces the second operating power of the hydrogen production device 120 first. If the second operating power of the hydrogen production device 120 is reduced to the lower limit of the preset operating power range (e.g., 20% of the rated power) and still does not reach the target power indicated by the peak shaving signal, the control module 130 further controls the energy storage device 110 to further discharge. If the energy storage device 110 reaches the maximum power and still does not reach the target power indicated by the peak shaving signal, the control module 130 controls the hydrogen production device 120 to shut down.

[0151] Further, in the present application scenario, the preset operating power range of the hydrogen production device 120 can be [50% of the hydrogen production rated power P h , 110% of the hydrogen production rated power P h ], and the second operating power in the dispatchable state can be 80% P h . At this time, it is necessary to increase the average operating power of the hydrogen production device 120 during the valley electricity price period to increase the hydrogen production, and therefore the second operating power of the hydrogen production device 120 in the dispatchable state is determined as the median value of the preset operating power range, i.e., 80% P h . The lower limit of the preset operating power range of 50% P h is to make the range of upward and downward adjustment of the hydrogen production device 120 equal. In actual applications, the specific value of the second operating power of the hydrogen production device 120 in the dispatchable state can also be slightly less than the median value of the preset operating power range.

[0152] Further, in the present application scenario, the preset operating power range of the energy storage device 110 can be [P es2 , + the energy storage rated power P es ], and the first operating power in the dispatchable state can be the lower limit of the preset operating power range P es2 .

[0153] The lower limit of the preset operating power range of the energy storage device 110 within the joint operation period can be determined according to the amount of electricity transferred to the inside of the energy storage device 110 in response to the peak shaving signal within the non-joint operation period. Specifically, the energy storage device 110 adjusts the amount of electricity stored therein during the valley electricity price period, and the specific adjustment value is the amount of electricity transferred to the energy storage device 110 during the peak shaving process in the flat electricity price and peak electricity price periods. Considering that the energy storage device 110 is usually in a charging operation during the peak shaving process, the first operating power P es2 of the energy storage device 110 in the dispatchable state can be calculated based on the following formula:

[0154]

[0155] wherein, ΔE rrΔE is the amount of electricity transferred by the energy storage device 110 in the peak regulation process in the non-joint operation period; Δt is the joint operation period, i.e., the energy storage adjustment period. In the application scenario, the energy storage adjustment period is the valley electricity price period, and the non-joint operation period is the flat electricity price and peak electricity price period.

[0156] Further, ΔE rr The specific numerical value depends on the dispatch signal distribution and the energy loss of the energy storage device 110 in the charging and discharging process, which can be calculated based on the following formula, for example:

[0157] ΔE rr = (1-η)∫(P rr )dt;

[0158] Wherein, η is the energy loss rate of the energy storage device 110 in the charging or discharging process; P rr is the power corresponding to the peak regulation signal; t is time.

[0159] The amount of electricity transferred by the energy storage device 110 in the peak regulation process in the non-joint operation period ΔE rr may be the amount of electricity charged into the energy storage device 110 on the previous trading day. Since there may be a small number of cases where electricity is discharged, the amount of electricity transferred is considered in the calculation of the first operating power P es2 of the energy storage device 110 in the standby state in the application scenario.

[0160] In the joint operation period of the application scenario, when no dispatch signal is received, the control module 130 can adjust the first operating power of the energy storage device 110 according to the standby state of the energy storage device 110 in the current application scenario, and adjust the second operating power of the hydrogen production device 120 according to the standby state of the hydrogen production device 120 in the current application scenario.

[0161] Specifically, the second operating power of the hydrogen production device 120 in the standby state can be determined according to the period to which the current time belongs and the preset operating power range.

[0162] Further, the first operating power of the energy storage device 110 in the standby state can be determined according to the dispatch signal, the period to which the current time belongs, and the preset operating power range.

[0163] Further, during the period when no dispatch signal is received, the energy of the hydrogen production device 120 running in the standby state can be obtained from the energy storage device 110, so as to reduce the consumption of grid electricity and further reduce the hydrogen production electricity cost.

[0164] For example, in the application scenario, in the no-dispatch state, the hydrogen production device 120 can run at 80% P hHydrogen production, i.e. running at the median value of the preset operating power range corresponding to the time period. The energy storage device 110 runs at P es2 Discharge, i.e. running at the lower limit of the preset operating power range corresponding to the time period, to consume the electricity charged in the previous peak shaving process of the energy storage device 110.

[0165] For example, in the undistributed state, the hydrogen production device 120 can run at the discharge power of the energy storage device 110 in the peak electricity price and flat electricity price time period. Since the operating powers of the two devices are equal, from the perspective of the power grid, the energy storage and hydrogen production combined supply system 100 does not consume the power grid electricity.

[0166] From the above, in the application scenario, to avoid safety hazards such as explosion of the devices, the second operating power of the hydrogen production device 120 must not be lower than 20% of the rated power. On the premise that the peak shaving benefit is not high, the application scenario controls the hydrogen production device 120 to additionally produce hydrogen in addition to the power grid auxiliary service in the low electricity price valley electricity price time period. In the flat electricity price and peak electricity price time period, since the hydrogen production device 120 maintains 20% of the rated power, the electricity cost is high, and therefore the energy storage device 110 is mainly used to adjust the participation in the power peak shaving auxiliary service. h

[0167] In one specific implementation, the coupling control method described in the embodiment can further include the steps of: when the joint operation time period is left for a first preset time length, detecting the state of charge of the energy storage device 110; and if the state of charge of the energy storage device 110 is greater than a first preset threshold, increasing the second operating power.

[0168] Taking the application scenario in which the energy storage device 110 and the hydrogen production device 120 are jointly operated only in the valley electricity price time period, and only the energy storage device 110 is operated alone in the flat electricity price and peak electricity price time period, as an example. In this application scenario, if the energy storage electricity of the energy storage device 110 at the end of the joint operation is greater than 30%, it will affect the peak shaving performance of the energy storage device 110 in the flat electricity price and peak electricity price time period, and therefore it is necessary to control the SOC of the energy storage device 110 to be below the first preset threshold before the end of the joint operation time period.

[0169] Further, the first preset threshold can be 30%, and the first preset time length can be 0.5 hours. For example, at 0.5 hours from the end of the valley electricity price time period, the control module 130 can detect the SOC of the energy storage device 110. If the SOC of the energy storage device 110 is greater than 30% at this time, the control module 130 can further increase the second operating power of the hydrogen production device 120 to absorb the energy storage discharge when the hydrogen storage tank 124 has an additional remaining capacity after the hydrogen production device 120 responds to the peak shaving signal.

[0170] ​Further, to more quickly and more fully absorb the discharge of the energy storage, the control module 130 can control the second operating power of the hydrogen production device 120 to exceed the upper limit of the preset operating power range (i.e., 110% P h ) in a short time.

[0171] In actual applications, the specific values of the first preset time length and the first preset threshold value can be adjusted as needed.

[0172] Further, the coupling control method described in the embodiment can further include the step of: if the second operating power of the hydrogen production device 120 has been increased to the upper limit of the preset operating power range, controlling the hydrogen production device 120 to continue operating to consume the power of the energy storage device 110 after the joint operating period ends.

[0173] That is, if the SOC of the energy storage device 110 is higher than 30% at the later stage of the joint operating period, but there is no room for the power of the hydrogen production device 120 to be increased, the excess power can be stored in the battery cabin 112. Further, the hydrogen production device 120 does not shut down immediately after the joint operating period ends, but continues to operate for a period of time (such as 0.5 hours to 1 hour) to reduce the SOC of the energy storage device 110.

[0174] Further, the control module 130 can also regularly or in real time monitor the SOC of the energy storage device 110, and when it is found that the SOC of the energy storage device 110 is close to or lower than 10%, the first operating power of the energy storage device 110 is increased to increase the SOC. In this way, the SOC of the energy storage device 110 can be prevented from being too low to damage the health of the device.

[0175] Further, in the application scenario, the energy storage device 110 provides peak shaving services alone during the flat electricity price and peak electricity price periods, and charges or discharges according to the peak shaving signal, usually charging. Specifically, there is generally an excess of electricity in China, so the peak shaving on the user side usually means increasing the power consumption, and accordingly, the energy storage peak shaving usually means charging the energy storage device 110. In a very small number of cases, the power system also needs the user side to reduce power consumption, and this service can be implemented in the form of a power demand response service.

[0176] In a specific implementation, when the joint operating period covers multiple electricity price periods, the operating power ranges and the states to be dispatched of the energy storage device 110 and the hydrogen production device 120 in different electricity price periods can be different. Therefore, in this specific implementation, the response order of the two devices to the dispatch signal can be further adjusted according to the electricity price period to which the current time belongs, so as to better reduce the cost.

[0177] Further, the preset operating power range of the hydrogen production device 120 can be different for different electricity price periods to which the joint operating period belongs.

[0178] In the embodiment, the step S1022 can include the following steps: if the current time belongs to the joint operation period, determining the distribution order according to the power price period to which the joint operation period belongs; adjusting the operation power of the device in the front of the distribution order in priority to the target power; and adjusting the operation power of the device in the rear of the distribution order according to the excess part if the target power exceeds the preset operation power range of the device in the front of the distribution order.

[0179] That is, when a single device cannot meet the peak shaving demand, the second device starts to serve.

[0180] Specifically, when the power price period to which the joint operation period belongs is the valley power price period, the control module 130 can determine that the distribution order is that the hydrogen production device 120 is prior to the energy storage device 110.

[0181] Further, when the power price period to which the joint operation period belongs is the non-valley power price period, the control module 130 can determine that the distribution order is that the energy storage device 110 is prior to the hydrogen production device 120.

[0182] In one variant, when the operation power of the device in the front of the distribution order is adjusted in priority to the target power, if the power of the device in the front of the distribution order reaches the upper limit of the preset operation power range, the control module 130 can adjust the operation power of the device in the rear of the distribution order according to the target power.

[0183] In a typical application scenario, the energy storage device 110 and the hydrogen production device 120 are jointly operated all day, wherein the distribution order of the peak shaving signal in the valley power price period is that the hydrogen production device 120 is prior to the energy storage device 110, and the distribution order of the peak shaving signal in the flat power price period and the peak power price period is that the energy storage device 110 is prior to the hydrogen production device 120.

[0184] Specifically, in the application scenario, the preset operation power range of the hydrogen production device 120 in the valley power price period can be [50% of the hydrogen production rated power P h , 110% of the hydrogen production rated power P h ], and the second operation power in the scheduled state can be 80% P h . The preset operation power range of the hydrogen production device 120 in the flat power price period and the peak power price period can be [20% of the hydrogen production rated power P h , 110% of the hydrogen production rated power P h ], and the second operation power in the scheduled state can be the lower limit of the preset operation power range corresponding to the period (i.e., 20% P h ), so as to reduce the hydrogen production cost in the high power price period.

[0185] Further, in the application scenario, the preset operating power range of the energy storage device 110 can be [-P es , 0], and the first operating power in the state to be dispatched is the standby state. The standby state refers to a state in which the energy storage device 110 is ready to respond at any time but is not charging or discharging.

[0186] In the application scenario, the hydrogen production device 120 is preferentially called to participate in the peak shaving service to improve the hydrogen production amount of the hydrogen production device 120. Further, since the electricity cost of hydrogen production is the lowest during the valley electricity price period, the control module 130 preferentially calls the hydrogen production device 120 to participate in the peak shaving during the valley electricity price period, which can improve the hydrogen production amount. During the flat electricity price period and the peak electricity price period, the control module 130 preferentially calls the energy storage device 110 and then calls the hydrogen production device 120, which aims to reduce the electricity cost of hydrogen production under the electricity price condition.

[0187] In the application scenario, when the peak shaving signal is not received, the control module 130 controls the energy storage device 110 and the hydrogen production device 120 to operate in the respective states to be dispatched. Further, the energy storage device 110 supplies power to the hydrogen production device 120. For example, the energy storage device 110 charges as much as possible at night (i.e., the valley electricity price period) and preferentially supplies power to the hydrogen production device 120 to produce hydrogen during the day (i.e., the flat electricity price period and the peak electricity price period).

[0188] In a variation of the application scenario, although the hydrogen production device 120 is preferentially called to respond to the peak shaving signal during the valley electricity price period, the energy storage device 110 can also be called. Therefore, the energy storage device 110 also accumulates electricity during the valley electricity price period. During the flat electricity price period and the peak electricity price period, the electricity accumulated by the energy storage device 110 can be supplied to the operating power required by the hydrogen production device 120 in the state to be dispatched to reduce the hydrogen production cost.

[0189] Next, the specific process of step S102 will be described in detail taking the dispatch signal as a frequency modulation signal as an example.

[0190] In a specific implementation, step S102 can include the step of adjusting the first operating power and / or the second operating power according to the frequency modulation signal, the time period to which the current time belongs, and the state of charge of the energy storage device.

[0191] Specifically, referring to Figure 5 , step S102 can further include the following steps:

[0192] Step S1027, determining a joint operating period according to the state of charge of the energy storage device;

[0193] Step S1028, if the current time belongs to the joint operating period, adjusting the first operating power and the second operating power according to the target power distribution;

[0194] Step S1029, if the current time does not belong to the joint operation period, adjusting the first operation power according to the target power.

[0195] More specifically, in the step S1027, the greater the change of the state of charge of the energy storage device, the longer the joint operation period. Further, the joint operation period covers at least the valley electricity price period.

[0196] Further, the joint operation period refers to a period in which the energy storage device 110 and the hydrogen production device 120 both participate in frequency modulation auxiliary services. It should be noted that the participation of the energy storage device 110 and the hydrogen production device 120 in frequency modulation auxiliary services in the embodiment refers to that the energy storage device 110 and the hydrogen production device 120 are at least in the respective standby state to be dispatched, and whether they jointly respond to the frequency modulation signal depends on the length and target power of the currently received frequency modulation signal.

[0197] Further, the non-joint operation period refers to a period in which the hydrogen production device 120 does not work, such as does not participate in frequency modulation auxiliary services. In this period, the energy storage device 110 is mainly used to provide frequency modulation auxiliary services.

[0198] In a typical application scenario, the energy storage device 110 and the hydrogen production device 120 are jointly operated only in the valley electricity price period, and only the energy storage device 110 is operated alone in the flat electricity price period and the peak electricity price period.

[0199] Specifically, in the joint operation period, the received frequency modulation signal is distributed between the energy storage device 110 and the hydrogen production device 120.

[0200] That is, in the flat electricity price period and the peak electricity price period, the energy storage device 110 is operated alone, and the average working state is the standby state of not charging and not discharging; in the valley electricity price period, the energy storage device 110 and the hydrogen production device 120 are jointly operated, and the hydrogen production device 120 is given priority to provide power frequency modulation auxiliary services over the energy storage device 110.

[0201] Further, the hydrogen production device 120 is given priority to provide power frequency modulation auxiliary services over the energy storage device 110, which means that the hydrogen production device 120 is mainly used to respond to the frequency modulation signal, and when the change range of the target power indicated by the frequency modulation signal exceeds the preset operation power range of the hydrogen production device 120, the energy storage device 110 joins the response.

[0202] Further, in the application scenario, the preset operation power range of the hydrogen production device 120 can be [50% of the hydrogen production rated power P h , 110% of the hydrogen production rated power P h ], and the second operation power in the standby state to be dispatched can be 80% P hThe second operating power in the to-be-scheduled state is preferably set at the middle value of the preset operating power range, so that the upward adjustment and downward adjustment are approximately equal. The second operating power in the to-be-scheduled state is set to 80%P h The hydrogen production conversion efficiency of the hydrogen production device 120 can be ensured to be the highest, 50%P h The lower limit is to make the upward and downward adjustment power range of the hydrogen production device 120 equal.

[0203] Further, in the application scenario, the preset operating power range of the energy storage device 110 can be [-energy storage rated power P es , -P es1 ], and the first operating power in the to-be-scheduled state can be the upper limit -P es1 of the preset operating power range. The energy storage device 110 is in an average charging state during the valley electricity price period, and if necessary, the charging power of the energy storage device 110 can be increased to -energy storage rated power P es , and the energy storage device 110 charges at -P es1 under the condition of no scheduling signal.

[0204] Further, the upper limit -P es1 of the preset operating power range can be determined according to the amount of electricity transferred by the energy storage device 110 during the non-joint operation period in response to the frequency modulation signal. Specifically, the energy storage device 110 provides frequency modulation service alone during the flat electricity price and peak electricity price periods, and during the frequency modulation process, part of the electricity is transferred, and there is a loss in the process of conversion of the energy storage device 110 between charging and discharging. Therefore, the amount of electricity transferred by the energy storage device 110 during the flat electricity price and peak electricity price periods needs to be charged during the valley electricity price period.

[0205] For example, the upper limit -P es1 of the preset operating power range can be calculated based on the following formula:

[0206]

[0207] Wherein, ΔE agc is the amount of electricity transferred by the energy storage device 110 during the frequency modulation process during the flat electricity price and peak electricity price periods; and Δt is the duration of the user-side valley electricity price period.

[0208] Further, the specific value of ΔE agc depends on the scheduling signal distribution and the energy loss of the energy storage device 110 during the charging and discharging processes, and for example, can be calculated based on the following formula:

[0209] ΔE agc = ∫(P agcup -P agcdown)dt + η∫(P agcup + P agcdown )dt;

[0210] wherein, η is the energy loss rate of the energy storage device 110 during charging or discharging; P agcup is the frequency modulation signal for upward adjustment; P agcdown is the frequency modulation signal for downward adjustment; t is time.

[0211] In a variant, the frequency modulation benefits can also be taken into account to more accurately adjust the first operating power and the second operating power.

[0212] From the above, in the application scenario, when the frequency modulation benefit is low, the average operating power of the hydrogen production device 120 in the valley electricity price period is 80% P h , so as to produce more hydrogen at low electricity price. The hydrogen production device 120 is shut down in the flat electricity price and peak electricity price periods, so as to reduce the electricity cost of maintaining the hydrogen production device 120 at 20% P h . Further, in the application scenario, the energy storage device 110 can provide frequency modulation service all day, and in the valley electricity price period, the frequency modulation task of the energy storage device 110 is relatively small in order to guarantee the priority of the hydrogen production device 120, and in the flat electricity price and peak electricity price periods, the energy storage device 110 alone modulates frequency to bear more frequency modulation service.

[0213] In a specific implementation, the coupling control method described in the embodiment can further include the steps of: detecting the state of charge of the energy storage device 110 when the current time is less than the second preset time length from the end of the valley electricity price period; and if the state of charge of the energy storage device 110 is less than the second preset threshold, adjusting the allocation order so that the allocation order of the energy storage device 110 is prior to that of the hydrogen production device 120.

[0214] Taking the application scenario in which the energy storage device 110 and the hydrogen production device 120 jointly operate only in the valley electricity price period, and only the energy storage device 110 operates alone in the flat electricity price and peak electricity price periods, as an example. In this application scenario, although the energy storage device 110 usually does not have much power transfer during frequency modulation, the characteristics of the frequency modulation signal cause the energy storage device 110 to need to be frequently charged and discharged, which can damage the battery performance and life, and when the SOC of the energy storage device 110 is too low (such as out of the range of 60% to 90%) when switching between different electricity price periods, the energy storage device 110 needs to be supplemented with power.

[0215] Further, the second preset threshold value can be 60%, and the second preset time length can be 0.5 hours. For example, the control module 130 can detect the SOC of the energy storage device 110 0.5 hours before the end of the valley electricity price period, and if the SOC is lower than 60%, the distribution of the frequency modulation signal between the energy storage device 110 and the hydrogen production device 120 is adjusted, and the energy storage device 110 is mainly used and the hydrogen production device 120 is assisted to respond. Thus, the energy storage device 110 is called more by reducing the calling of the hydrogen production device 120, so as to charge the energy storage device 110, so that the SOC of the energy storage device 110 is in the range of 60%-90% at the end of the valley electricity price period.

[0216] In actual application, the specific values of the second preset time length and the second preset threshold value can be adjusted as needed.

[0217] Further, in the application scenario, the energy storage device 110 provides frequency modulation service alone during the flat electricity price period and the peak electricity price period, and charges and discharges according to the frequency modulation signal, which is usually frequently alternated.

[0218] In a specific implementation, when the joint operation period covers multiple electricity price periods, the operating power range and the to-be-scheduled state of the energy storage device 110 and the hydrogen production device 120 in different electricity price periods can be different. Therefore, in the specific implementation, the response order of the two devices to the scheduling signal can be further adjusted according to the electricity price period to which the current time belongs, so as to better reduce the cost.

[0219] Further, the preset operating power range of the hydrogen production device 120 can be different when the joint operation period belongs to different electricity price periods.

[0220] In the specific implementation, the step S1028 can include the steps of: if the current time belongs to the joint operation period, determining the distribution order according to the electricity price period to which the joint operation period belongs; adjusting the operating power of the device in front of the distribution order according to the target power; and adjusting the operating power of the device behind the distribution order according to the excess part if the target power exceeds the preset operating power range of the operating power of the device in front of the distribution order.

[0221] Specifically, when the joint operation period belongs to the valley electricity price period, the control module 130 can determine that the distribution order is that the hydrogen production device 120 is prior to the energy storage device 110.

[0222] Further, when the joint operation period belongs to the non-valley electricity price period, the control module 130 can determine that the distribution order is that the energy storage device 110 is prior to the hydrogen production device 120.

[0223] In one variation, when adjusting the operating power of the devices in front of the distribution sequence according to the target power, if the power of the device in front of the distribution sequence reaches the upper limit of the corresponding preset operating power range, the control module 130 can adjust the operating power of the device behind the distribution sequence according to the target power indicated by the frequency modulation signal.

[0224] In one typical application scenario, the energy storage device 110 and the hydrogen production device 120 are jointly operated all day long, wherein the distribution sequence of the frequency modulation signal in the valley electricity price period is the hydrogen production device 120 first and the energy storage device 110 second, and the distribution sequence of the frequency modulation signal in the flat electricity price period and the peak electricity price period is the energy storage device 110 first and the hydrogen production device 120 second.

[0225] Specifically, in this application scenario, the preset operating power range of the hydrogen production device 120 in the valley electricity price period can be [20% of the hydrogen production rated power P h , 110% of the hydrogen production rated power P h ], and the second operating power in the standby state can be 65% P h . In this application scenario, it is necessary to improve the power adjustment range and the adjustment task amount of the hydrogen production device 120. Therefore, the lower limit of the preset operating power range 20% P h is the minimum operating power of the hydrogen production device 120, and below this value, a safety hazard will be caused; and the upper limit of the preset operating power range 110% P h is the maximum operating power of the hydrogen production device 120. The second operating power of the hydrogen production device 120 in the standby state is the average value of the upper limit and the lower limit of the preset operating power range, so as to ensure that the power adjustment range is the same when responding to the frequency modulation signal for upward and downward adjustment.

[0226] Further, in this application scenario, the preset operating power range of the energy storage device 110 can be [-P es , -P es3 ], and the first operating power in the standby state can be the median value of the preset operating power range, that is, -(P es + P es3 ) / 2. The average state of the energy storage device 110 in the joint operation period is the charging state, and the first operating power in the standby state is suitable for charging 80% of the rated power in the valley electricity price period when the energy storage device 110 participates in the frequency modulation process, so as to maximize the frequency modulation auxiliary service.

[0227] The upper limit of the preset operating power range -P es3 can be calculated according to the amount of electricity that needs to be charged by the energy storage device 110 in the valley electricity price period.

[0228] For example, when the SOC of the energy storage device 110 at the starting time of the valley electricity price period (denoted as the second starting time) is 10%, and it needs to charge 80% of the rated capacity within the valley electricity price period, i.e., the SOC of the energy storage device 110 needs to reach 90% at the end of the valley electricity price period. Correspondingly, the upper limit of the preset operating power range of the energy storage device 110 is P es3 The upper limit of the preset operating power range of the energy storage device 110 can be calculated based on the following formula:

[0229]

[0230] wherein E is the rated capacity; and Δt is the duration of the valley electricity price period. es

[0231] In the application scenario, when the frequency modulation benefit is high and the energy storage device 110 stores more electricity, the hydrogen production device 120 and the energy storage device 110 can provide grid frequency modulation service to the maximum extent, which is beneficial to improve the frequency modulation benefit of the energy storage device 110 and the hydrogen production device 120. Further, the energy storage device 110 enters the valley electricity price period at a SOC of 10%, which ensures that the energy storage device 110 can charge sufficient electricity during the valley electricity price period. Moreover, when the SOC of the energy storage device 110 is maintained in the interval of 10% to 90%, the device performance decays the slowest, which is beneficial to delay the device life.

[0232] In another typical application scenario, the joint operation period of the energy storage device 110 and the hydrogen production device 120 can cover the valley electricity price period and at least a part of the flat electricity price period and the peak electricity price period. In the valley electricity price period, the distribution order of the frequency modulation signal is the hydrogen production device 120 first and then the energy storage device 110; in the flat electricity price period and the peak electricity price period, the energy storage device 110 can be mainly used to respond to the frequency modulation signal, and the hydrogen production device 120 can be mainly used to adjust the SOC of the energy storage device 110 to maintain the energy storage device 110 in a set SOC range, so as to better prolong the battery life.

[0233] Specifically, the first starting time of the joint operation period is earlier than the second starting time of the valley electricity price period.

[0234] Further, the time deviation (denoted as t) between the first starting time and the second starting time can be determined according to the time required for the hydrogen production device 120 to consume the state of charge of the energy storage device 110 to a preset state of charge. The preset state of charge can be the minimum SOC of the energy storage device 110 under the premise of guaranteeing the device performance.

[0235] Further, the hydrogen production device 120 is started t hours before the start of the valley electricity price period to consume the SOC of the energy storage device 110 to the lower limit of the preset state of charge (i.e., 10%).

[0236] ​From the above, in the present application scenario, during the joint operation, the control module 130 further considers the attenuation characteristics of the energy storage device 110 when allocating the frequency modulation signal. On the one hand, the energy storage device 110 provides standby power for the hydrogen production device 120, and on the other hand, the hydrogen production device 120 is also added to respond to the frequency modulation signal in order to maintain the shallow charge and shallow discharge state of the energy storage device 110. Among them, the shallow charge and shallow discharge state is to limit the operation rate of the energy storage device 110, and the power adjustment range is set to [-90%P es ,+90%P es ].

[0237] For example, the energy storage device 110 is charged to 90% SOC at the end of the valley electricity price period, and the hydrogen production device 120 is powered by the energy storage device 110 during the flat electricity price and peak electricity price periods to maintain the hydrogen production device 120 in the standby state. The preset operation power range of the energy storage device 110 during the flat electricity price and peak electricity price periods can be [P es4 , +90%P es ], the first operation power in the standby state is P es4 , and the average operation state of the energy storage device 110 during the flat electricity price and peak electricity price periods is to discharge 20%P h power of the hydrogen production device.

[0238] The lower limit P es4 of the preset operation power range can be calculated according to the amount of electricity that needs to be transferred by the energy storage device 110 to adjust the SOC during the flat electricity price and peak electricity price periods. During the flat electricity price and peak electricity price periods, the energy storage device 110 discharges P es4 to power the hydrogen production device 120.

[0239] For example, the lower limit P es4 of the preset operation power range can be calculated based on the formula P es4 = 40%P h -90%P es . Among them, 40%P h means 40% of the rated power of the hydrogen production device 120.

[0240] In the present example, the second operation power of the hydrogen production device 120 decreases to the minimum operation power 20%P h after the end of the valley electricity price period. At this time, the energy storage device 110 independently provides frequency modulation services during the flat electricity price and peak electricity price periods, but the hydrogen production device 120 is not shut down.

[0241] Further, when the SOC of the energy storage device 110 decreases to 50% during the flat and peak electricity price periods, the frequency modulation signal has the least impact on the battery life, and at this time, the control module 130 controls the hydrogen production device 120 to stop, and the energy storage device 110 alone responds to the frequency modulation signal. At this time, the preset operating power range of the energy storage device 110 can be [-90%P es , +90%P es ], that is, the energy storage device 110 determines the preset operating power range according to its maximum adjustable space, and the energy storage device 110 is in standby state in the scheduled state.

[0242] Further, t hours before the start of the valley electricity price period, the hydrogen production device 120 is restarted to consume the electricity of the energy storage device 110, so that the energy storage device 110 can enter the valley electricity price period with a SOC of 10%. During this period, the energy storage device 110 is switched back to the preset operating power range of [P es4 , +90%P es ], the first operating power in the scheduled state is P es4 , and the average operating state is discharged at 20%P h power of the hydrogen production device.

[0243] In the application scenario, the time deviation t between the first start time and the second start time refers to the time required to start the hydrogen production device 120 to consume the SOC of the energy storage device 110 from 50% to 10%.

[0244] For example, the time deviation t between the first start time and the second start time can be calculated based on the following formula:

[0245]

[0246] Wherein, the unit of t can be hours; 40% E es refers to the electricity consumed by the energy storage device 110 to decrease the SOC from 50% to 10%; and 20%P h is the second operating power of the hydrogen production device 120 during this period.

[0247] In a variant, the second operating power of the hydrogen production device 120 during the time deviation t between the first start time and the second start time can be appropriately increased to shorten the time t required to consume the electricity of the energy storage device 110.

[0248] From the above, in the application scenario, the switching transition period of the valley electricity price period and the flat and peak electricity price periods is jointly operated by the energy storage device 110 and the hydrogen production device 120, and the middle period of the flat and peak electricity price periods is independently operated by the energy storage device 110.

[0249] Further, the duration of the independent operation of the energy storage device 110 depends on the power of the energy storage device 110. For example, if a car is charging at the energy storage hydrogen combined power supply system 100 in the first half of the day, the energy storage device 110 enters the state of 50% SOC in advance, and the energy storage device 110 enters the state of responding to the frequency modulation signal in advance. For another example, if a car is charging at the energy storage hydrogen combined power supply system 100 in the second half of the day, the energy storage device 110 enters the combined operation mode in advance.

[0250] In one embodiment, when the dispatch signal is a frequency modulation signal, the step S102 of adjusting the first operating power and the second operating power according to the target power distribution can further include the step of: when the distribution sequence is that the energy storage device 110 is prior to the hydrogen production device 120, and the change amount of the target power is greater than the preset shallow charging and shallow discharging range of the energy storage device 110, the target power is proportionally distributed to the first operating power and the second operating power.

[0251] Therefore, during the combined operation period, the frequency modulation signal can be more reasonably distributed, thereby better prolonging the service life of the device.

[0252] Specifically, the distribution ratio can be 50% each, four-six split, etc.

[0253] For example, during the flat electricity price and peak electricity price period, the energy storage device 110 discharges to maintain the hydrogen production device 120 operating at the lowest 20% P h When the received frequency modulation signal is particularly long, if only the energy storage device 110 responds, the battery life may be damaged, and the control module 130 can call the hydrogen production device 120 to also respond. Among them, the frequency modulation signal is particularly long refers to the change amount of the target power indicated by the frequency modulation signal is relatively large. For example, assuming that the maximum charging power of the energy storage device 110 is 5 megawatts, and the target power indicated by the frequency modulation signal is 6 megawatts, one way is that the hydrogen production device 120 shares 1 megawatt and the energy storage device 110 shares 5 megawatts, and another way is that the hydrogen production device 120 shares 3 megawatts and the energy storage device 110 shares 3 megawatts. For another example, if the target power indicated by the frequency modulation signal is 4 megawatts, even if it does not exceed the maximum power range of the energy storage device 110, the control module 130 still controls the energy storage device 110 and the hydrogen production device 120 to each distribute 2 megawatts of frequency modulation signal. Dynamically allocating the task amount of the two devices can maximize the delay of the attenuation of the energy storage device 110.

[0254] In the present embodiment, since the frequency modulation signal and the peak modulation signal have different characteristics, the frequency modulation signal is a fast power adjustment, and the peak modulation signal is a slow power adjustment. Therefore, during the combined operation period, the preset operating power range of the hydrogen production device 120 corresponding to the frequency modulation signal and the peak modulation signal can be consistent, but the preset operating power range of the energy storage device 110 for different types of dispatch signals is different.

[0255] In one specific implementation, before the step S101 of receiving the dispatching signal, the coupling control method can further include the steps of: determining the service type participating in the dispatching service in the current operation period according to historical data; and calculating the assistable power in the current operation period according to the determined service type and reporting the assistable power.

[0256] Specifically, the historical data can include historical income data of participating in the dispatching service. The dispatching service can include peak shaving service and frequency modulation service.

[0257] Further, the current operation period can be the current day, such as a valley electricity price period, a flat electricity price period, and a peak electricity price period.

[0258] Further, the assistable power can be determined according to a power variation amount, wherein the power variation amount is a difference between an operating power of the device participating in the dispatching service in a to-be-dispatched state and a boundary of a preset operating power range. That is, the assistable power refers to an additional power consumption amount in the original state of the device.

[0259] Due to different service types, the devices participating in the service in different time periods in the current operation period are different, and thus the calculation parameters of the assistable power are also different.

[0260] For example, in the valley electricity price period, the energy storage device 110 and the hydrogen production device 120 are jointly operated in the peak shaving service, and accordingly, the assistable power is the sum of the additional power consumptions of the two devices. For another example, in the flat electricity price period, only the energy storage device 110 operates in the peak shaving service, and accordingly, the assistable power is the additional power consumption of the energy storage device 110. For another example, in the peak electricity price period, the peak shaving service does not participate in bidding, and accordingly, the assistable power can be considered as zero.

[0261] That is, if it is determined to participate in the peak shaving service, the control module 130 performs bidding transactions according to the rated power of the energy storage device 110 and the rated power of the hydrogen production device 120 in the valley electricity price period, performs bidding transactions according to the rated power of the energy storage device 110 in the flat electricity price period, and does not participate in the peak shaving service and thus does not bid in the peak electricity price period.

[0262] For another example, in the different electricity price periods, the preset operating power ranges of the two devices are different in the frequency modulation service, and thus the additional power consumptions are determined according to the sum of the preset operating power ranges of the two devices in different electricity price periods.

[0263] Further, since the frequency modulation service and the peak shaving service are mutually exclusive and cannot be participated in at the same time, the control module 130 can select a service type with better income according to historical income to bid.

[0264] In one embodiment, the control module 130 can repeat the above steps to determine the service types and corresponding assistable power involved in the current operation period on a daily basis. In the process of bidding for the power ancillary service market, the control module 130 determines the overall power regulation range of the energy storage and hydrogen production combined supply system 100 at the corresponding time according to the schemes shown in the embodiments of Figure 2 、 Figure 4 and Figure 5 The energy storage and hydrogen production combined supply system 100 according to the schemes shown in the embodiments of the present application can provide power frequency modulation ancillary services, power peak regulation services, charging services, and hydrogen production services.

[0265] Therefore, the maximum transaction volume of the energy storage and hydrogen production combined supply system 100 in the process of trading in the power ancillary service market does not exceed the overall power regulation range of the energy storage and hydrogen production combined supply system 100, avoiding the dispatch signal exceeding the regulation capacity of the energy storage device 110 and the hydrogen production device 120.

[0266] From the above, the energy storage and hydrogen production combined supply system 100 according to the schemes provided by the present application can provide power frequency modulation ancillary services, power peak regulation services, charging services, and hydrogen production services.

[0267] Further, device failure early warning can also be achieved. The device operation and maintenance management function of the control module 130 can discover abnormal states of the devices, notify the operation and maintenance personnel in advance to perform device maintenance, achieve preventive maintenance based on the device state, avoid maintenance after device failure, reduce unexpected device downtime, and improve device utilization.

[0268] Further, costs can also be reduced. The energy storage and hydrogen production combined supply system 100 uses the power ancillary service income of the energy storage device 110 and the hydrogen production device 120 to reduce the power consumption cost of the charging and hydrogen production device.

[0269] Further, device utilization can also be improved. The energy storage and hydrogen production combined supply system 100 controls the coupled operation of the energy storage device 110 and the hydrogen production device 120 through the control module 130, which can delay the capacity degradation of the battery energy storage and improve the utilization of the device assets.

[0270] Further, the embodiments of the present application also disclose a storage medium having a computer program stored thereon, wherein the computer program is run by a processor to execute the method technical solutions in the embodiments of the present application shown in Figure 2 、 Figure 4 and Figure 5 Preferably, the storage medium can include a computer readable storage medium such as a non-volatile memory or a non-transitory memory. The storage medium can include a ROM, a RAM, a magnetic disk, or an optical disk, etc.

[0271] It should be noted that the terms "first", "second" and the like in the description and in the claims are used only for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the descriptive terms "first", "second", etc. are to be interpreted, by those skilled in the art, as a structural or positional description and not by their reference

[0272] It should be noted that the features of the embodiments of the present application can be combined with each other, if not in contradiction.

[0273] Although the present application has been disclosed with reference to the above embodiments, the above embodiments are not intended to limit the present application. Any person skilled in the art, without departing from the spirit and scope of the present application, can make various modifications and changes, and the scope of protection of the present application should be limited by the scope defined in the claims.

Claims

1. A coupling control method of an energy storage and hydrogen supply combined system, characterized by, The energy storage and hydrogen production combined system participates in power auxiliary services of the power grid as a user side, and the coupling control method comprises: determining a service type participating in dispatching services in a current operation period according to historical data, the dispatching services comprising peak shaving services and frequency modulation services; calculating an auxiliary power in the current operation period according to the determined service type and reporting; receiving a dispatching signal; adjusting a first operation power of the energy storage device and / or a second operation power of the hydrogen production device according to at least the dispatching signal, so that the sum of the first operation power and the second operation power is equal to a target power indicated by the dispatching signal.

2. The coupling control method according to claim 1, characterized by, The dispatching signal is a peak shaving signal, and the adjusting the first operation power of the energy storage device and / or the second operation power of the hydrogen production device according to at least the dispatching signal comprises: adjusting the first operation power and / or the second operation power according to the peak shaving signal, a time period to which a current time belongs, and a peak shaving benefit.

3. The coupling control method according to claim 2, characterized by, The adjusting the first operation power and / or the second operation power according to the peak shaving signal, the time period to which the current time belongs, and the peak shaving benefit comprises: determining a joint operation time period according to the peak shaving benefit; if the current time belongs to the joint operation time period, adjusting the first operation power and the second operation power according to the target power distribution; if the current time does not belong to the joint operation time period, adjusting the first operation power according to the target power.

4. The coupling control method according to claim 3, characterized by, The determining the joint operation time period according to the peak shaving benefit comprises that the greater the peak shaving benefit is, the longer the joint operation time period is.

5. The coupling control method according to claim 3, characterized by, A lower limit of a preset operation power range of the energy storage device in the joint operation time period is determined according to an amount of power transferred by the energy storage device in a non-joint operation time period in response to the peak shaving signal.

6. The coupling control method according to claim 3, characterized by, Further comprising: when the joint operation time period remains a first preset duration, detecting a state of charge of the energy storage device; if the state of charge of the energy storage device is greater than a first preset threshold, increasing the second operation power.

7. The coupling control method according to claim 6, characterized by, Further comprising: if the second operation power of the hydrogen production device has been increased to an upper limit of the preset operation power range, controlling the hydrogen production device to continue operating to consume power of the energy storage device after the joint operation time period ends.

8. The coupling control method of claim 1, wherein, The dispatching signal is a frequency modulation signal, and the adjusting the first operation power of the energy storage device and / or the second operation power of the hydrogen production device according to at least the dispatching signal comprises: adjusting the first operation power and / or the second operation power according to the frequency modulation signal, a time period to which a current time belongs, and a state of charge of the energy storage device.

9. The coupling control method according to claim 8, characterized by, The adjusting the first operation power and / or the second operation power according to the frequency modulation signal, the time period to which the current time belongs, and the state of charge of the energy storage device comprises: determining a joint operation time period according to the state of charge of the energy storage device; if the current time belongs to the joint operation time period, adjusting the first operation power and the second operation power according to the target power distribution; if the current time does not belong to the joint operation time period, adjusting the first operation power according to the target power.

10. The coupling control method according to claim 9, characterized by, An upper limit of a preset operation power range of the energy storage device in the joint operation time period is determined according to an amount of power transferred by the energy storage device in a non-joint operation time period in response to the frequency modulation signal.

11. The coupling control method according to claim 9, characterized by, Also comprising: detecting the state of charge of the energy storage device when the current time is less than the second preset time length from the end of the valley electricity price period; if the state of charge of the energy storage device is less than the second preset threshold, adjusting the distribution order to make the distribution order of the energy storage device prior to the hydrogen production device.

12. The coupling control method of claim 9, wherein, The longer the state of charge of the energy storage device changes, the longer the joint operation period.

13. The coupling control method according to claim 3 or 4 or 9 or 12, characterized by, The joint operation period covers at least the valley electricity price period.

14. The coupling control method according to claim 13, wherein, The first start time of the joint operation period is earlier than the second start time of the valley electricity price period, and the time deviation between the first start time and the second start time is determined according to the time required for the hydrogen production device to consume the state of charge of the energy storage device to a preset state of charge.

15. The coupling control method according to claim 3 or 9, characterized by, If the current time belongs to the joint operation period, the first operation power and the second operation power are adjusted according to the target power distribution adjustment. If the current time belongs to the joint operation period, the distribution order is determined according to the electricity price period to which the joint operation period belongs. The operation power of the device in front of the distribution order is adjusted according to the target power priority. If the target power exceeds the preset operation power range of the operation power of the device in front of the distribution order, the operation power of the device behind the distribution order is adjusted according to the excess part; or If the power of the device in front of the distribution order reaches the upper limit of the preset operation power range, the operation power of the device behind the distribution order is adjusted according to the target power.

16. The coupling control method of claim 15, wherein, When the scheduling signal is a frequency modulation signal, the first operation power and the second operation power are adjusted according to the target power distribution adjustment. When the distribution order is that the energy storage device is prior to the hydrogen production device, and the variation of the target power is greater than the preset shallow charging and discharging range of the energy storage device, the target power is proportionally distributed to the first operation power and the second operation power.

17. The coupling control method of claim 15, wherein, The distribution order is determined according to the electricity price period to which the joint operation period belongs. When the electricity price period to which the joint operation period belongs is the valley electricity price period, it is determined that the distribution order is that the hydrogen production device is prior to the energy storage device. When the electricity price period to which the joint operation period belongs is the non-valley electricity price period, it is determined that the distribution order is that the energy storage device is prior to the hydrogen production device.

18. The coupling control method according to claim 3 or 9, characterized by, The electricity price period to which the joint operation period belongs is different, and the preset operation power range of the hydrogen production device is different.

19. The coupling control method of claim 1, wherein, Also comprising: During the period when no scheduling signal is received, the first operation power and the second operation power are adjusted according to the standby state.

20. The coupling control method of claim 19, wherein, The second operation power of the hydrogen production device in the standby state is determined according to the period to which the current time belongs and the preset operation power range.

21. The coupling control method of claim 19, wherein, The standby state of the energy storage device is a standby state, or the first operation power of the energy storage device in the standby state is determined according to the scheduling signal, the period to which the current time belongs, and the preset operation power range.

22. The coupling control method of claim 19, wherein, When the hydrogen production device operates in the standby state during the period when no scheduling signal is received, the energy is obtained from the energy storage device.

23. The coupling control method of claim 1, wherein, The historical data includes historical income data participating in the scheduling service.

24. The coupling control method of claim 1, wherein, The auxiliary power is determined according to a power variation, wherein the power variation is a difference between an operating power of the device participating in the dispatching service in a to-be-dispatched state and a boundary of a preset operating power range.

25. An energy storage and hydrogen production cogeneration system, comprising: The energy storage and hydrogen production combined system participates in power auxiliary services of a power grid as a user side and includes: An energy storage device for converting alternating current into direct current and storing; A hydrogen production device for preparing hydrogen gas by using electric energy; A control module coupled to the energy storage device and the hydrogen production device, respectively, and configured to execute the coupling control method according to any one of claims 1 to 24 to adjust a first operating power of the energy storage device and a second operating power of the hydrogen production device according to a received dispatching signal.

26. The energy storage and hydrogen co-production system of claim 25, wherein, Further comprising: A charging module coupled to the energy storage device to output the stored electric energy of the energy storage device.

27. The energy storage and hydrogen co-production system of claim 25, wherein, Further comprising: A hydrogen adding module coupled to the hydrogen production device to output the prepared hydrogen gas of the hydrogen production device.

28. A storage medium having stored thereon a computer program, characterized in that The computer program, when executed by a processor, performs the steps of the method according to any one of claims 1 to 24.

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