Control method and device of energy system and electronic equipment

Abstract

The invention provides an energy system control method and device and electronic equipment, and the method comprises the steps: obtaining the real-time output power of a fluctuation energy supply unit; when it is determined that the real-time output power is smaller than a preset first power threshold value, obtaining a real-time commercial power price for the commercial power network; the first power threshold value is the minimum power supply power required by normal operation of the electrolytic cell unit; and under the condition of determining that the real-time commercial power price does not exceed the preset electricity price threshold value, controlling to conduct the first power grid interface so as to supply power to the electrolytic cell unit through the commercial power network. Therefore, the electricity price consideration factor is introduced in the operation process of the electricity-hydrogen comprehensive energy system, and the low-cost mains supply network is accessed to perform power compensation when the fluctuation energy supply cannot meet the electrolysis requirement, so that the operation stability of the electricity-hydrogen comprehensive energy system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy systems, and in particular to a control method, device and electronic equipment for an energy system. Background Art

[0002] With the continuous development and popularization of renewable energy technology, the conversion of renewable energy such as wind and solar power to achieve efficient energy utilization through the storage, supply and consumption of electricity, heat and other energies has become an important form of energy utilization at present.

[0003] Hydrogen energy is a clean secondary energy source. The hydrogen produced by water electrolysis is used as a storage medium for wind / solar energy. Based on the development of emerging energy industries such as "renewable energy +" and green hydrogen, it increases the proportion of green electricity connected to the power system of refining and chemical enterprises and is one of the effective ways to promote the electrification substitution of refining and chemical enterprises.

[0004] The wind, solar, and hydrogen multi-energy coupling system under the petrochemical power system has the characteristics of a high proportion of renewable energy and significant power electronics in the power system. Power production faces high uncertainty. In addition, petrochemical enterprises have the characteristics of stable and long-term production. It is necessary to have analysis methods and means that can support the scenarios of petrochemical enterprises, and guide and implement a stable control and efficient management and control technology system that can meet the process needs of petrochemical enterprises. Summary of the invention

[0005] The present invention provides a control method, device, electronic device and storage medium of an energy system, which are used to at least solve the defect of unstable operation of an integrated energy system caused by real-time output power fluctuation of a fluctuating energy supply unit in the prior art.

[0006] The present invention provides a control method for an energy system, wherein the energy system comprises a fluctuating energy supply unit, an electrolyzer unit and a hydrogen storage unit connected in series, wherein the fluctuating energy supply unit comprises a wind power supply module and / or a photovoltaic power supply module, wherein the electrolyzer unit is used to generate hydrogen by electrolysis operation, and the electrolyzer unit is provided with a first grid interface for connecting to a mains power network, and the hydrogen storage unit is used to store the hydrogen generated by the electrolyzer unit, wherein the method comprises: obtaining the real-time output power of the fluctuating energy supply unit; when it is determined that the real-time output power is less than a preset first power threshold, obtaining the real-time mains power price for the mains power network; the first power threshold is the minimum power supply required for the normal operation of the electrolyzer unit; when it is determined that the real-time mains power price does not exceed the preset power price threshold, controlling the first grid interface to be turned on so as to supply power to the electrolyzer unit through the mains power network.

[0007] According to a control method for an energy system provided by the present invention, the energy system further includes an energy storage unit, and the energy storage unit is connected in series between the fluctuating energy supply unit and the electrolyzer unit, wherein after obtaining the real-time city electricity price for the city electricity network, the method further includes: when it is determined that the real-time city electricity price exceeds the electricity price threshold, obtaining a first energy storage remaining capacity of the energy storage unit; when it is determined that the first energy storage remaining capacity exceeds a preset first energy storage capacity threshold, controlling the electrolyzer unit to be powered by the energy storage unit.

[0008] According to a control method for an energy system provided by the present invention, after obtaining the first energy storage remaining capacity of the energy storage unit, the method also includes: when it is determined that the first energy storage remaining capacity does not exceed the first energy storage capacity threshold, controlling the first grid interface to be turned on to supply power to the electrolyzer unit through the municipal power network.

[0009] According to a control method for an energy system provided by the present invention, after obtaining the real-time mains electricity price for the mains power network, the method further includes: when it is determined that the real-time mains electricity price does not exceed a preset electricity price threshold, sending a first mode instruction to the electrolytic cell unit, so that the electrolytic cell unit performs electrolysis operation according to a preset rated electrolysis power according to the first mode instruction.

[0010] According to a control method for an energy system provided by the present invention, after obtaining the real-time output power of the fluctuating energy supply unit, the method further includes: when it is determined that the real-time output power is greater than or equal to the first power threshold, detecting the real-time power loss of the energy system, and calculating the effective output power for the electrolyzer unit based on the real-time output power and the real-time power loss; when it is determined that the effective output power is greater than a preset rated electrolysis power, sending a second mode instruction to the electrolyzer unit, so that the electrolyzer unit performs electrolysis operation according to the rated electrolysis power according to the second mode instruction.

[0011] According to a control method for an energy system provided by the present invention, the energy storage unit is provided with a second grid interface for connecting to a mains power network, wherein, after sending a second mode instruction to the electrolyzer unit, the method further comprises: in the case of determining that a hydrogen storage full signal is detected, obtaining a second energy storage remaining capacity of the energy storage unit; the hydrogen storage full signal is used to indicate that the hydrogen storage unit is full of hydrogen; in the case of determining that the second energy storage remaining capacity exceeds a preset second energy storage capacity threshold, controlling the second grid interface to be turned on to supply power to the mains power network through the energy storage unit.

[0012] According to a control method for an energy system provided by the present invention, after calculating the effective output power for the electrolyzer unit based on the real-time output power and the real-time power loss, the method further includes: when it is determined that the effective output power is less than or equal to the rated electrolysis power, sending a third mode instruction to the electrolyzer unit, so that the electrolyzer unit performs electrolysis operation according to the effective output power according to the third mode instruction.

[0013] According to a control method of an energy system provided by the present invention, after sending a third mode instruction to the electrolyzer unit, the method also includes: obtaining a third energy storage remaining capacity of the energy storage unit; and when it is determined that the third energy storage remaining capacity is greater than or equal to a preset third energy storage capacity threshold, controlling the electrolyzer unit to be powered by the energy storage unit according to the difference between the rated electrolysis power and the effective output power.

[0014] The present invention also provides a control device for an energy system, the device comprising a fluctuating energy supply unit, an electrolyzer unit, a hydrogen storage unit and a main control unit connected in series, the fluctuating energy supply unit comprising a wind power supply module and / or a photovoltaic power supply module, the electrolyzer unit being used to generate hydrogen through electrolysis operation, and the electrolyzer unit being provided with a first grid interface for connecting to a mains power network, the hydrogen storage unit being used to store the hydrogen generated by the electrolyzer unit, wherein the main control unit is used to perform the following operations: obtaining the real-time output power of the fluctuating energy supply unit; when it is determined that the real-time output power is less than a preset first power threshold, obtaining the real-time mains power price for the mains power network; the first power threshold is the minimum power supply required for the normal operation of the electrolyzer unit; when it is determined that the real-time mains power price does not exceed the preset power price threshold, controlling the first grid interface to be turned on to supply power to the electrolyzer unit through the mains power network.

[0015] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a control method for an energy system as described above is implemented.

[0016] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the control method of the energy system as described in any one of the above is implemented.

[0017] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the control method of the energy system as described above is implemented.

[0018] The present invention provides a control method, device, electronic device and storage medium for an energy system. In the method, during the operation of the electric-hydrogen integrated energy system, when the real-time output power of the fluctuating energy supply unit cannot meet the minimum power supply for the normal operation of the electrolyzer unit, the real-time mains electricity price of the mains network is obtained, and when the real-time mains electricity price is low, the mains network is connected to supply power to the electrolyzer unit. Thus, the electricity price consideration factor is introduced during the operation of the electric-hydrogen integrated energy system, and when the fluctuating energy supply cannot meet the electrolysis demand, the low-cost mains electricity supply is connected for power compensation, thereby improving the operational stability of the electric-hydrogen integrated energy system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A structural block diagram of an example of an energy system according to an embodiment of the present invention is shown;

[0021] Figure 2 A flowchart showing an example of a method for controlling an energy system according to an embodiment of the present invention is shown;

[0022] Figure 3 A structural block diagram of an example of an energy system according to an embodiment of the present invention is shown;

[0023] Figure 4 A flowchart showing an example of a method for controlling an energy system according to an embodiment of the present invention is shown;

[0024] Figure 5 A flowchart showing an example of a method for controlling an energy system according to an embodiment of the present invention;

[0025] Figure 6 A flowchart showing an example of a method for controlling an energy system according to an embodiment of the present invention is shown;

[0026] Figure 7 A flowchart showing an example of a method for controlling an energy system according to an embodiment of the present invention;

[0027] Figure 8 A structural block diagram showing an example of a control device for an energy system according to an embodiment of the present invention;

[0028] Fig. 9 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Figure 1 A structural block diagram of an example of an energy system according to an embodiment of the present invention is shown.

[0031] like Figure 1 As shown, the energy system includes a fluctuating energy supply unit 110, an electrolyzer unit 120 and a hydrogen storage unit 130 connected in series. Here, the fluctuating energy supply unit 110 can represent a renewable energy power supply unit, for example, the fluctuating energy supply unit 110 includes a wind power supply module 111 and a photovoltaic power supply module 113. The electrolyzer unit 120 is used to generate hydrogen by electrolysis operation, and the electrolyzer unit 120 is provided with a first grid interface 121 for connecting to a mains power network (not shown), for example, by switching control of a relay or a crystal diode to achieve connection or disconnection with the mains power network. The hydrogen storage unit 130 is used to store the hydrogen generated by the electrolyzer unit 120.

[0032] In some embodiments, each of the above units may further include corresponding optional auxiliary equipment. For example, a compressor (not shown) is also provided in the electrolyzer unit 120 to store the generated hydrogen in the hydrogen storage unit 130 after being pressurized by the compressor. In addition, a sensor module (not shown) may also be included in the hydrogen storage unit 130 to achieve rapid and accurate perception of the stored hydrogen reserves.

[0033] Figure 2 A flowchart showing an example of a method for controlling an energy system according to an embodiment of the present invention is shown.

[0034] Regarding the execution subject of the method of the embodiment of the present invention, it can be any controller with computing or processing capabilities to improve the comprehensive operating performance of the integrated energy system. In some examples, it can be integrated and configured in an electronic device through software, hardware, or a combination of software and hardware, and can be a smart phone, smart watch, desktop computer, laptop, virtual reality terminal, augmented reality terminal, wireless terminal, laptop portable computer, edge computing node, cloud server, etc., which should not be limited here.

[0035] In some embodiments, the executive body controller can be connected to the fluctuating energy supply unit, the electrolyzer unit, and the hydrogen storage unit, respectively, to improve the comprehensive operating performance of the electric-hydrogen integrated energy system by implementing personalized strategy control.

[0036] like Figure 2 As shown, in step S210, the real-time output power of the fluctuation energy supply unit is obtained.

[0037] In some examples of the embodiments of the present invention, the fluctuating energy supply unit adopts a renewable energy unit, and the power it can output is related to the external environmental conditions. For example, the greater the light intensity or the stronger the wind, the greater the real-time output power output by the fluctuating energy supply unit. In some implementations, a power meter is provided for the output interface of the fluctuating energy supply unit to achieve timely and accurate measurement of the real-time output power.

[0038] In step S220, when it is determined that the real-time output power is less than the preset first power threshold, the real-time mains electricity price for the mains electricity network is obtained.

[0039] Here, the first power threshold is the minimum power supply required for the normal operation of the electrolyzer unit. Therefore, by comparing the real-time output power with the first power threshold, it is determined in real time whether the power supply of the fluctuating energy supply unit can meet the minimum demand for the normal operation of the electrolyzer unit.

[0040] In some embodiments, the real-time city electricity price is collected by querying a preset peak-valley power supply price table, which includes local power supply prices at different times. As an additional or alternative embodiment, the real-time city electricity price is queried by sending a query instruction to a third-party server.

[0041] In step S230, when it is determined that the real-time city electricity price does not exceed the preset electricity price threshold, the first grid interface is controlled to be turned on to supply power to the electrolyzer unit through the city electricity network.

[0042] Here, the electricity price threshold can be set according to the actual business scenario or personalized needs. For example, the electricity price threshold can represent the boundary basis for dividing valley electricity. Therefore, by comparing the real-time city electricity price with the electricity price threshold, it is possible to quickly identify whether the current electricity price is a low valley electricity price, and use valley electricity to power the electrolyzer unit, which can not only meet the power supply needs of the electrolyzer unit, but also meet the needs of effectively controlling the operating costs of the electricity-hydrogen integrated energy system.

[0043] Through the embodiments of the present invention, demand response is introduced in the electricity market, peak and valley electricity prices are introduced in the operation of the electricity-hydrogen integrated energy system, the total electricity load of the system is reduced as much as possible during peak electricity consumption periods, and during valley electricity consumption periods, the electricity load is appropriately increased according to its own conditions, thereby achieving adaptive adjustment of the hydrogen production load under various working conditions, greatly improving the economy of the system and maintaining the operational stability of the electricity-hydrogen integrated energy system.

[0044] In some examples of embodiments of the present invention, when it is determined that the real-time market electricity price does not exceed the preset electricity price threshold, a first mode instruction is sent to the electrolyzer unit, so that the electrolyzer unit performs electrolysis operation according to the preset rated electrolysis power according to the first mode instruction. Here, the rated electrolysis power can represent the power supply power of the electrolyzer unit corresponding to the rated working state, or the maximum working power that the electrolyzer unit can withstand. Thus, the power supply at the valley electricity price is fully utilized, and the electrolyzer unit is controlled to maintain the rated high-power working state, so as to achieve low-cost investment and high-return output for the energy system, and improve the comprehensive operation performance of the electric-hydrogen integrated energy system.

[0045] Figure 3 A structural block diagram of an example of an energy system according to an embodiment of the present invention is shown.

[0046] like Figure 3 As shown, the energy system 300 includes a fluctuating energy supply unit 310, an energy storage unit 320, an electrolyzer unit 330 and a hydrogen storage unit 340 connected in series. Here, the energy storage unit 320 is used to store the fluctuating electric energy output by the fluctuating energy supply unit 310, and can provide a constant power output to the electrolyzer unit 330, which can achieve a more stable power supply than the fluctuating energy supply unit. Exemplarily, the energy storage unit can be a battery.

[0047] In some embodiments, the energy storage unit 320 is provided with a second grid interface 321 for connecting to a mains network (not shown). Exemplarily, through coupling of the second grid interface 321, the energy storage unit 320 is used to provide power supply to the mains network.

[0048] Figure 4 A flowchart showing an example of a method for controlling an energy system according to an embodiment of the present invention is shown.

[0049] like Figure 4 As shown, in step S410, the real-time output power of the fluctuation energy supply unit is obtained.

[0050] In step S420, when it is determined that the real-time output power is less than a preset first power threshold, a real-time mains electricity price for the mains electricity network is obtained.

[0051] In step S430, when it is determined that the real-time market electricity price exceeds a preset electricity price threshold, a first energy storage remaining capacity of the energy storage unit is obtained.

[0052] In step S440, when it is determined that the first energy storage remaining capacity exceeds the preset first energy storage capacity threshold, the energy storage unit is controlled to supply power to the electrolyzer unit, and the electrolyzer unit is controlled to operate according to the first power threshold.

[0053] Here, the first energy storage capacity threshold may be set based on individual business requirements or energy storage units, such as the minimum energy storage capacity that the energy storage unit can output for external power supply.

[0054] Through the embodiments of the present invention, when it is detected that the power output of the fluctuating energy supply unit cannot meet the normal operation requirements of the electrolyzer unit and the current city electricity price is high, an energy storage unit with a certain energy storage capacity is used to provide power supply to the electrolyzer unit to maintain the lowest power operating state of the electrolyzer unit, thereby meeting the dual requirements of the integrated energy system for stability and operating costs.

[0055] With respect to the above step S440, in another aspect of the embodiment of the present invention, when it is determined that the remaining capacity of the first energy storage does not exceed the first energy storage capacity threshold, the first grid interface is controlled to be turned on to supply power to the electrolyzer unit through the mains network. Thus, when the remaining capacity of the energy storage unit is low, the mains supply is controlled to be connected to give priority to ensuring the operational stability of the system.

[0056] Figure 5 A flowchart showing an example of a method for controlling an energy system according to an embodiment of the present invention is shown.

[0057] like Figure 5 As shown, in step S510, the real-time output power of the fluctuation energy supply unit is obtained.

[0058] In step S520, when it is determined that the real-time output power is greater than or equal to the first power threshold, the real-time power loss of the energy system is detected, and the effective output power for the electrolyzer unit is calculated according to the real-time output power and the real-time power loss.

[0059] Here, the effective output power may represent the working power acting on both ends of the electrolyzer unit. Specifically, the effective output power of the electrolyzer unit may be obtained by subtracting the real-time output power from the real-time power loss.

[0060] It should be understood that the power output by the fluctuating energy supply unit cannot be fully or completely applied to the electrolyzer unit. For example, in order to maintain the functional integrity of the energy system, there are various load components in the energy system, such as compressors, resistors and inductors, etc., which will occupy a certain amount of power during the operation of the system, that is, a certain degree of power loss will be generated.

[0061] In some embodiments, a power loss model for the energy system is constructed in advance based on the load properties (e.g., resistance value), quantity, and connection relationships of the load components in the energy system to output corresponding real-time power loss for different real-time output powers.

[0062] In step S530, when it is determined that the effective output power is greater than the preset rated electrolysis power, a second mode instruction is sent to the electrolysis cell unit, so that the electrolysis cell unit performs electrolysis operation according to the rated electrolysis power according to the second mode instruction.

[0063] Therefore, when the effective output power provided by the fluctuating energy supply unit is sufficient, the mode of the electrolyzer unit is set based on the second mode instruction, so that the electrolyzer unit can maintain working in the rated state, thereby improving the hydrogen production efficiency.

[0064] In step S540, when it is determined that a hydrogen storage full signal is detected, a second energy storage remaining capacity of the energy storage unit is acquired, and the hydrogen storage full signal is used to indicate that the hydrogen storage unit is full of hydrogen.

[0065] Exemplarily, the hydrogen storage content in the hydrogen storage unit is monitored by receiving a hydrogen storage fullness signal from a sensor module in the hydrogen storage unit.

[0066] In step S550, when it is determined that the remaining capacity of the second energy storage exceeds the preset second energy storage capacity threshold, the second grid interface is controlled to be turned on to supply power to the mains network through the energy storage unit. In some embodiments, the second energy storage capacity threshold may represent a value point close to full capacity to enable monitoring and identification of the full charge state of the energy storage unit.

[0067] Therefore, based on the sufficient power supply of the fluctuating energy supply unit, the electrolyzer unit is controlled to maintain the rated working state, and when the energy storage unit is kept with sufficient energy storage margin, the energy storage unit is used to provide a constant power supply to the municipal power network, thereby realizing the power supply of the energy system to the grid and improving the economic benefits of the energy system.

[0068] Figure 6 A flowchart showing an example of a method for controlling an energy system according to an embodiment of the present invention is shown.

[0069] like Figure 6As shown, in step S610, the real-time output power of the fluctuation energy supply unit is obtained.

[0070] In step S620, when it is determined that the real-time output power is greater than or equal to the first power threshold, the real-time power loss of the energy system is detected, and the effective output power for the electrolyzer unit is calculated according to the real-time output power and the real-time power loss.

[0071] In step S630, when it is determined that the effective output power is less than or equal to the rated electrolysis power, a third mode instruction is sent to the electrolyzer unit, so that the electrolyzer unit performs electrolysis operation according to the effective output power according to the third mode instruction.

[0072] Therefore, when it is detected that the effective output power is insufficient to reach the rated electrolysis power, the electrolyzer unit is controlled to be switched to a working state in which the power can be adjusted in real time. The power of the electrolyzer unit is controlled by utilizing the effective output power that the fluctuation energy supply unit can provide in real time, thereby ensuring the hydrogen production efficiency of the energy system to the greatest extent.

[0073] In step S640, a third energy storage remaining capacity of the energy storage unit is obtained.

[0074] In step S650, when it is determined that the third energy storage remaining capacity is greater than or equal to a preset third energy storage capacity threshold, power is supplied to the electrolytic cell unit through the energy storage unit according to the difference between the rated electrolysis power and the effective output power.

[0075] Here, the third energy storage capacity threshold may also be set according to business requirements, for example, it may be the same value as the first energy storage capacity threshold or the second energy storage capacity threshold, or a value between the first energy storage capacity threshold and the second energy storage capacity threshold.

[0076] Thus, when the power provided by the fluctuating energy supply unit is slightly insufficient, the energy storage unit is used to provide power supplement to the electrolyzer unit. In some embodiments, the energy storage unit is controlled to output power according to the difference between the rated electrolysis power and the effective output power, so as to keep the electrolyzer unit operating at the rated electrolysis power, thereby further improving the hydrogen production efficiency of the energy system.

[0077] Figure 7 A flowchart showing an example of a method for controlling an energy system according to an embodiment of the present invention is shown.

[0078] like Figure 7 As shown, in step S710, the wind power, photovoltaic power output sequence and load sequence are determined. Specifically, by collecting the output of renewable energy such as wind power and photovoltaic power, the corresponding renewable energy output value, that is, the renewable energy power value, is determined.

[0079] In step S720, it is determined whether the renewable energy power value is greater than or equal to the minimum operating power of the electrolyzer.

[0080] In step S7310, when the renewable energy power value is less than the minimum operating power of the electrolyzer, the real-time electricity price of the mains network is obtained, and it is determined whether the real-time electricity price is greater than the valley electricity price.

[0081] In step S7311, when the real-time electricity price is greater than the valley electricity price, the electrolytic cell is controlled to operate in the minimum load operating state.

[0082] In step S7313, it is determined whether the remaining capacity of the energy storage unit is greater than or equal to the minimum capacity.

[0083] In step S7315, when the remaining capacity of the energy storage unit is greater than or equal to the minimum capacity, the energy storage unit is controlled to supply power to the electrolytic cell.

[0084] In step S7317, when the remaining capacity of the energy storage unit is less than the minimum capacity, the control purchases electricity from the city power grid to produce hydrogen, and stores the hydrogen in the hydrogen storage tank.

[0085] On the other hand, in step S7312, when the real-time electricity price does not exceed the valley electricity price, the electrolytic cell is set to the rated operating state.

[0086] In step S7314, the control purchases electricity from the city power grid to produce hydrogen, and stores the hydrogen in a hydrogen storage tank.

[0087] On the other hand, in step S7320, when the renewable energy power value is greater than the minimum operating power of the electrolytic cell, it is determined whether the remaining power after the load exceeds the maximum power of the electrolytic cell.

[0088] In step S7321, when the remaining power exceeds the maximum power of the electrolytic cell, the electrolytic cell is set to a rated operating state.

[0089] In step S7323, the control stores hydrogen in the hydrogen storage tank.

[0090] In step S7325, check whether the hydrogen storage tank is full.

[0091] In step S7327, when the hydrogen storage tank is full, it is further detected whether the remaining capacity of the energy storage unit exceeds a preset remaining power threshold.

[0092] In step S7329, when the remaining capacity of the energy storage unit does not exceed the remaining power threshold, the energy storage unit is controlled to store the remaining power.

[0093] In step S73211, when the remaining capacity of the energy storage unit exceeds the remaining power threshold, the remaining power of the energy storage unit is controlled to be connected to the mains network to achieve the surplus power access.

[0094] In addition, in step S7322, when the remaining power does not exceed the maximum power of the electrolytic cell, the electrolytic cell is set to an adjustable operating state, and its operating power is floatingly adjusted according to the remaining power.

[0095] In step S7324, the control stores hydrogen in the hydrogen storage tank.

[0096] In step S7326, it is detected whether the remaining capacity of the energy storage unit is greater than or equal to the minimum capacity threshold.

[0097] In step S7328, when the remaining capacity of the energy storage unit is greater than or equal to the minimum capacity threshold, the energy storage unit is used to power the electrolyzer to achieve power compensation and improve hydrogen production efficiency.

[0098] Through the embodiment of the present invention, when the output of renewable energy is lower than the minimum operating power of the electrolyzer and the electricity price is the valley electricity price, the electrolyzer operates in the rated state, and when the output of renewable energy is lower than the minimum operating power of the electrolyzer and the electricity price is greater than the valley electricity price, the electrolyzer is in the minimum load operating state. In addition, when the electrolyzer operates in the rated operating state and there is surplus output of renewable energy, the energy storage battery is charged. When the electrolyzer operates in the minimum load operating state or the adjustable state, the energy storage battery has surplus capacity, the energy storage battery is in a discharge state, and power is supplied to the electrolyzer. In addition, when the electrolyzer operates in the rated operating state, the energy storage battery is full and there is still surplus renewable energy, the remaining renewable energy is incorporated into the power grid. In addition, when the electrolyzer operates in the rated operating state, the energy storage battery is full and there is still surplus renewable energy, the remaining renewable energy is incorporated into the power grid.

[0099] It should be noted that in the example of the embodiment of the present invention, the electrolyzer is configured to have three different operating states, namely, the minimum load operating state, the rated operating state, and the adjustable operating state. In the minimum load operating state, the electrolyzer operates at the minimum power; in the rated operating state, the electrolyzer operates at the rated power; in the adjustable operating state, the operating power of the electrolyzer is adjusted as the real-time output power changes.

[0100] In some examples, when the power of renewable energy such as wind power / photovoltaic is not less than the rated power of the electrolyzer, the electrolyzer is set to the rated operating state or the adjustable operating state; when the power of renewable energy such as wind power / photovoltaic is not greater than the minimum operating power of the electrolyzer, the working state of the electrolyzer is determined according to the electricity price. If the electricity price is not valley electricity, it is set to the minimum load operating state, and if the electricity price is valley electricity, it is set to the rated operating state. Here, the minimum operating power of the electrolyzer can be set to 5% to 10% of the corresponding rated power.

[0101] In one or more exemplary embodiments of the present invention, the electric-hydrogen integrated energy system has eight operating modes, specifically including:

[0102] Operation mode 1: All electricity generated by renewable energy is utilized, the electrolyzer is in a power-adjustable operation state, hydrogen is pressurized by the compressor and stored in the hydrogen storage tank, and energy storage is in a stopped state.

[0103] Operation mode 2: All the electricity generated by renewable energy is utilized, the electrolyzer is in a power-adjustable operation state, the hydrogen is pressurized by the compressor and stored in the hydrogen storage tank, and the energy storage supplies power to the electrolyzer and the compressor.

[0104] Operation mode 3: All the electricity generated by renewable energy is utilized, the electrolyzer is in rated operation, the hydrogen is pressurized by the compressor and stored in the hydrogen storage tank, the hydrogen storage tank is full, and the energy storage unit stores the remaining electricity.

[0105] Operation mode 4: Abandon some renewable energy to maintain the energy balance of the system. The electrolyzer is in rated operation. The hydrogen is boosted by the compressor and stored in the hydrogen storage tank. The hydrogen storage tank is full and the energy storage unit stores the remaining electrical energy to the maximum charge state.

[0106] Operation mode 5: All the electricity generated by renewable energy is utilized, the electrolyzer is in rated operation, the hydrogen is pressurized by the compressor and stored in the hydrogen storage tank, the hydrogen storage tank is full, and the energy storage is stopped.

[0107] Operation mode 6: All electricity generated by renewable energy is utilized, the electricity price is off-peak, the electrolyzer is in rated operation, electricity is purchased to produce hydrogen, the hydrogen is boosted by the compressor and stored in the hydrogen storage tank, and the hydrogen storage tank is full.

[0108] Operation mode 7: All electricity generated by renewable energy is utilized, the electrolyzer is in the lowest load operation state, the real-time electricity price is greater than the valley electricity price, electricity is purchased to produce hydrogen, the hydrogen is pressurized by the compressor and stored in the hydrogen storage tank, and energy storage is in a stopped state.

[0109] Operation mode 8: All electricity generated by renewable energy is utilized, the electrolyzer is in the lowest load operation state, the real-time electricity price is greater than the valley electricity price, electricity is purchased to produce hydrogen, the hydrogen is pressurized by the compressor and stored in the hydrogen storage tank, and the energy storage powers the electrolyzer and the compressor.

[0110] Through the embodiments of the present invention, the adaptive adjustment of the hydrogen production load under various working conditions is achieved without increasing repeated construction, which greatly improves the economy of the system and the comprehensive operating performance of the electric-hydrogen integrated energy system. In addition, the free adjustment capability of the power supply of the new power system equipment or devices of the refining enterprise is improved. Furthermore, the operation control method of the electric-hydrogen integrated energy system based on peak-valley electricity prices can be applied to the design, operation and management of new power systems of refining enterprises, the preparation and application of green hydrogen in petrochemical enterprises, and the improvement of system safety with the participation of demand-side resources.

[0111] The control device of the energy system provided by the present invention is described below. The control device of the energy system described below and the control method of the energy system described above can be referred to each other.

[0112] Figure 8 A structural block diagram of an example of a control device for an energy system according to an embodiment of the present invention is shown.

[0113] like Figure 8 As shown, the control device 800 of the energy system includes a fluctuating energy supply unit 810, an electrolyzer unit 820, a hydrogen storage unit 830 and a main control unit 840 connected in series, the fluctuating energy supply unit 810 includes a wind power supply module and / or a photovoltaic power supply module, the electrolyzer unit 820 is used to generate hydrogen by electrolysis operation, and the electrolyzer unit is provided with a first grid interface for connecting to a mains power network, the hydrogen storage unit 830 is used to store the hydrogen generated by the electrolyzer unit, wherein the main control unit 840 is used to perform the following operations: obtaining the real-time output power of the fluctuating energy supply unit; when it is determined that the real-time output power is less than a preset first power threshold, obtaining the real-time mains power price for the mains power network; the first power threshold is the minimum power supply required for the normal operation of the electrolyzer unit; when it is determined that the real-time mains power price does not exceed the preset power price threshold, controlling the first grid interface to be turned on to supply power to the electrolyzer unit through the mains power network.

[0114] Fig. 9 An example of a physical structure diagram of an electronic device is shown in FIG. Fig. 9As shown, the electronic device may include: a processor 910, a communication interface 920, a memory 930 and a communication bus 940, wherein the processor 910, the communication interface 920 and the memory 930 communicate with each other through the communication bus 940. The processor 910 may call the logic instructions in the memory 930 to execute the control method of the energy system, the method comprising: obtaining the real-time output power of the fluctuating energy supply unit; when it is determined that the real-time output power is less than a preset first power threshold, obtaining the real-time mains price for the mains network; the first power threshold is the minimum power supply required for the normal operation of the electrolyzer unit; when it is determined that the real-time mains price does not exceed the preset power price threshold, controlling the first grid interface to be turned on to supply power to the electrolyzer unit through the mains network.

[0115] In addition, the logic instructions in the above-mentioned memory 930 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0116] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method of the energy system provided by the above-mentioned methods, which includes: obtaining the real-time output power of the fluctuating energy supply unit; when it is determined that the real-time output power is less than a preset first power threshold, obtaining the real-time mains electricity price for the mains network; the first power threshold is the minimum power supply required for the normal operation of the electrolyzer unit; when it is determined that the real-time mains electricity price does not exceed the preset electricity price threshold, controlling the first grid interface to be turned on to supply power to the electrolyzer unit through the mains network.

[0117] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the control method of the energy system provided by the above-mentioned methods, the method comprising: obtaining the real-time output power of the fluctuating energy supply unit; when it is determined that the real-time output power is less than a preset first power threshold, obtaining the real-time mains electricity price for the mains power network; the first power threshold is the minimum power supply required for the normal operation of the electrolyzer unit; when it is determined that the real-time mains electricity price does not exceed the preset electricity price threshold, controlling the first power grid interface to be turned on to supply power to the electrolyzer unit through the mains power network.

[0118] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0119] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for an energy system, characterized in that: The energy system comprises a fluctuating energy supply unit, an electrolyzer unit and a hydrogen storage unit connected in series, wherein the fluctuating energy supply unit comprises a wind power supply module and / or a photovoltaic power supply module, the electrolyzer unit is used to generate hydrogen by electrolysis operation, and the electrolyzer unit is provided with a first grid interface for connecting to a mains power network, and the hydrogen storage unit is used to store the hydrogen generated by the electrolyzer unit, wherein the method comprises: Obtaining the real-time output power of the fluctuation energy supply unit; When it is determined that the real-time output power is less than a preset first power threshold, obtaining a real-time mains electricity price for the mains network; the first power threshold is the minimum power supply power required for the normal operation of the electrolyzer unit; When it is determined that the real-time mains electricity price does not exceed a preset electricity price threshold, the first grid interface is controlled to be turned on to supply power to the electrolyzer unit through the mains network.

2. The control method of the energy system according to claim 1, characterized in that: The energy system further comprises an energy storage unit, which is connected in series between the fluctuation energy supply unit and the electrolyzer unit. Wherein, after obtaining the real-time mains electricity price for the mains electricity network, the method further comprises: When it is determined that the real-time market electricity price exceeds the electricity price threshold, obtaining a first energy storage remaining capacity of the energy storage unit; When it is determined that the first energy storage remaining capacity exceeds a preset first energy storage capacity threshold, the energy storage unit is controlled to supply power to the electrolyzer unit, and the electrolyzer unit is controlled to operate according to the first power threshold.

3. The control method of the energy system according to claim 2, characterized in that: After obtaining the first energy storage remaining capacity of the energy storage unit, the method further includes: When it is determined that the first energy storage remaining capacity does not exceed the first energy storage capacity threshold, the first grid interface is controlled to be turned on to supply power to the electrolyzer unit through the mains network.

4. The control method of the energy system according to claim 1, characterized in that: After obtaining the real-time mains electricity price for the mains electricity network, the method further comprises: When it is determined that the real-time market electricity price does not exceed the preset electricity price threshold, a first mode instruction is sent to the electrolyzer unit, so that the electrolyzer unit performs electrolysis operation according to the preset rated electrolysis power according to the first mode instruction.

5. The control method of the energy system according to claim 1, characterized in that: After obtaining the real-time output power of the fluctuating energy supply unit, the method further includes: In the case of determining that the real-time output power is greater than or equal to the first power threshold, detecting the real-time power loss of the energy system, and calculating the effective output power for the electrolyzer unit according to the real-time output power and the real-time power loss; When it is determined that the effective output power is greater than the preset rated electrolysis power, a second mode instruction is sent to the electrolysis cell unit, so that the electrolysis cell unit performs electrolysis operation according to the rated electrolysis power according to the second mode instruction.

6. The control method of the energy system according to claim 5, characterized in that: The energy storage unit is provided with a second grid interface for connecting to a mains power network. Wherein, after sending the second mode instruction to the electrolyzer unit, the method further includes: In the case where it is determined that a hydrogen storage full signal is detected, obtaining a second energy storage remaining capacity of the energy storage unit; the hydrogen storage full signal is used to indicate that the hydrogen storage unit is full of hydrogen; When it is determined that the second energy storage remaining capacity exceeds a preset second energy storage capacity threshold, the second grid interface is controlled to be turned on to supply power to the mains network through the energy storage unit.

7. The control method of the energy system according to claim 5, characterized in that: After calculating the effective output power for the electrolyzer unit according to the real-time output power and the real-time power consumption, the method further comprises: When it is determined that the effective output power is less than or equal to the rated electrolysis power, a third mode instruction is sent to the electrolyzer unit, so that the electrolyzer unit performs electrolysis operation according to the effective output power according to the third mode instruction.

8. The control method of the energy system according to claim 7, characterized in that: After sending the third mode instruction to the electrolyzer unit, the method further includes: Obtaining a third energy storage remaining capacity of the energy storage unit; When it is determined that the third energy storage remaining capacity is greater than or equal to a preset third energy storage capacity threshold, the energy storage unit is controlled to supply power to the electrolytic cell unit according to the difference between the rated electrolysis power and the effective output power.

9. A control device for an energy system, characterized in that: The device comprises a fluctuating energy supply unit, an electrolyzer unit, a hydrogen storage unit and a main control unit connected in series, wherein the fluctuating energy supply unit comprises a wind power supply module and / or a photovoltaic power supply module, the electrolyzer unit is used to generate hydrogen by electrolysis, and the electrolyzer unit is provided with a first grid interface for connecting to a mains power network, and the hydrogen storage unit is used to store the hydrogen generated by the electrolyzer unit. The main control unit is used to perform the following operations: Obtaining the real-time output power of the fluctuation energy supply unit; When it is determined that the real-time output power is less than a preset first power threshold, obtaining a real-time mains electricity price for the mains network; the first power threshold is the minimum power supply power required for the normal operation of the electrolyzer unit; When it is determined that the real-time mains electricity price does not exceed a preset electricity price threshold, the first grid interface is controlled to be turned on to supply power to the electrolyzer unit through the mains network.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the control method of the energy system according to any one of claims 1 to 8 is implemented.

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