Multi-energy complementary "fire-light-storage-hydrogen" park power distribution network system and control method

Abstract

The application relates to the new energy technology field, in particular to a multi-energy complementary fire-light-storage-hydrogen park power distribution network system and a control method. The system is composed of a distributed fire-light complementary power generation system, an energy storage regulation system, a hydrogen production circulation system and an electricity load. In the two working modes of conventional operation and island operation, the multi-energy complementary fire-light-storage-hydrogen park power distribution network system optimizes and adjusts the electric power, realizes electric power balance, stabilizes the voltage and frequency of the power distribution network, reliably supplies power and optimizes the electric energy quality. The distributed fire power generation and the distributed photovoltaic power generation are combined as power sources and assist the energy storage regulation system to form a power supply source, so that the advantages of traditional energy and new energy can be complemented. The distributed fire-light complementary power generation system, the energy storage regulation system and the hydrogen production circulation system cooperate with each other, can produce hydrogen from redundant energy, recycle hydrogen energy to form hydrogen energy storage, and fully realize multi-energy complementation and recycling.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system and control method. Background Technology

[0002] As the global energy structure shifts towards cleaner and lower-carbon energy, the power distribution network in industrial parks is gradually developing towards multi-energy complementarity and intelligent control. Traditional energy systems are mainly based on thermal power generation, supplemented by new energy sources such as photovoltaics.

[0003] While related technologies integrate thermal power, photovoltaics, and energy storage, each energy unit operates independently, lacking a dynamic coordination mechanism. For example, photovoltaic output fluctuates greatly due to weather conditions, and thermal power has a slow response time, resulting in insufficient power supply stability. Energy storage systems (such as lithium batteries and supercapacitors) and hydrogen energy systems do not achieve cross-timescale coordination, failing to meet both instantaneous frequency regulation and long-term energy storage requirements. When the industrial park's distribution network operates independently from the main grid, traditional solutions rely on diesel generators or single energy storage devices, resulting in response delays and low regulation accuracy, making it difficult to meet high-reliability power supply requirements. Therefore, existing technologies struggle to achieve efficient coordination between thermal power, photovoltaics, energy storage, and hydrogen energy, resulting in insufficient power supply stability in islanded operation, low hydrogen recycling rates, and lagging intelligent control methods. Summary of the Invention

[0004] This application provides a multi-energy complementary "thermal-solar-storage-hydrogen" industrial park power distribution network system and control method to solve the problems in related technologies, such as difficulty in achieving efficient coordination of thermal power, photovoltaic, energy storage and hydrogen energy, insufficient power supply stability in islanded mode, low hydrogen energy recycling rate and lagging intelligent control methods.

[0005] To achieve the above objectives, a first aspect of this application provides a multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system, comprising: a power generation system, wherein the power generation system includes a distributed fire-solar complementary power generation system composed of distributed fire power generation units and solar power generation units, generating electricity based on the distributed fire power generation units and solar power generation units; an energy storage regulation system, used to call the corresponding energy storage system to perform corresponding power generation, hydrogen energy storage, or power distribution network voltage and power balancing operations under different target operating modes; a hydrogen production cycle system, which uses the electrical energy stored in the energy storage regulation system to produce hydrogen, stores the hydrogen in hydrogen tanks to convert it into hydrogen energy, and uses the stored hydrogen energy to regulate the power distribution network voltage and power balance; and a control system, which acquires the load data of the industrial park power distribution network, determines the target operating mode of the industrial park power distribution network based on the load data, and adjusts the power generation system, the energy storage regulation system, and the hydrogen production cycle system according to the target operating mode.

[0006] Optionally, the energy storage regulation system includes a first energy storage system, a second energy storage system, and a third energy storage system, wherein the first energy storage system is composed of a lithium iron phosphate battery pack, the second energy storage system is composed of a nickel-metal hydride battery pack, and the third energy storage system is composed of a supercapacitor pack.

[0007] Optionally, the first energy storage system is used to: adjust the total current output of the lithium iron phosphate battery pack in the first energy storage system during normal operation of the distribution network, smooth the power generation output of the power generation system, and make the output voltage of the power generation system approach the sinusoidal alternating current.

[0008] Optionally, the second energy storage unit is connected to a water electrolysis hydrogen production device, which is used to store excess electrical energy in the second energy storage system and start the hydrogen production cycle to convert it into hydrogen energy storage during the off-peak period of the power distribution network under normal operating conditions.

[0009] Optionally, the third energy storage unit is used to regulate power balance when the distribution network is in islanded operation mode.

[0010] A second aspect of this application provides a control method for a multi-energy complementary "thermal-solar-storage-hydrogen" industrial park power distribution network system. The method is applied to the multi-energy complementary "thermal-solar-storage-hydrogen" industrial park power distribution network system described in the above embodiment. The method includes the following steps: acquiring load data of the industrial park power distribution network; determining the target operating mode of the industrial park power distribution network based on the load data; and scheduling the power generation system, the energy storage regulation system, and the hydrogen production cycle system according to the target operating mode.

[0011] Optionally, scheduling the power generation system, the energy storage regulation system, and the hydrogen production cycle system according to the target operating mode includes: if the target operating mode is a normal operating mode, then the power generation system, the energy storage regulation system, and the hydrogen production cycle system generate electricity; if the target operating mode is an islanded operating mode, then the active power balance is regulated through the third energy storage system of the energy storage regulation system and the reactive power balance is regulated through the SVG (Static Var Generator).

[0012] Optionally, if the target operating mode is a normal operating mode, the power generation system, the first energy storage system of the energy storage regulation system, and the hydrogen production cycle system generate electricity, including: if the current time is during a peak electricity consumption period, the power generation system and the energy storage regulation system generate electricity, and the excess electricity is stored in the second energy storage unit of the energy storage regulation system; if the current time is during a low electricity consumption period, the excess electricity is stored in the second energy storage unit to produce hydrogen and store it in a hydrogen tank to form hydrogen energy storage.

[0013] Optionally, before adjusting the balance of active and reactive power through the third energy storage system, the process includes: detecting whether the output frequency and output voltage of the distribution network deviate from the corresponding preset safety range; if the output frequency and output voltage deviate from the preset safety range, calculating the change in active power and the change in reactive power; adjusting the active power based on the change in frequency and adjusting the reactive power based on the change in voltage until the output frequency and output voltage are within the preset safety range; and the voltage regulation system assists in adjusting the voltage magnitude.

[0014] Optionally, the formula for calculating the change in active power is:

[0015]

[0016] Where Δp is the change in the active power of the capacitor bank. f is the rate of change of the capacitor bank's frequency, θ is the proportion of the capacitor bank involved in frequency modulation, and f n The rated frequency is ΔE, and the change in power of the capacitor bank is ΔE.

[0017] Optionally, the formula for calculating the change in the output voltage is:

[0018]

[0019] Where X is the line reactance, Q is the reactive power, V is the output voltage of the distribution network, and β is the proportion of SVG participating in voltage regulation.

[0020] Optionally, after adjusting the reactive power balance via SVG, the following steps are included:

[0021] The voltage amplitude is adjusted by combining high-voltage and low-voltage control. The voltage control system monitors the voltage amplitude in real time and calculates the optimal value for voltage amplitude adjustment. The switching of the thyristors is controlled to select the corresponding number of transformer turns for switching, thereby stabilizing the voltage. At the same time, reactive power is adjusted to maintain reactive power balance. The specific steps are as follows:

[0022] The system acquires the voltage, current, and power parameters of each node in the distribution network; analyzes whether the current voltage level deviates from the set safe range based on these parameters; if the current voltage level deviates from the set safe range, it uses an optimization algorithm to calculate the optimal configuration of the corresponding voltage adjustment amount and transformer turns ratio; it controls the energy storage regulation system to send commands to the thyristors to adjust the trigger angle of the thyristors, or to fully open / close the thyristors; it determines the transformer turns ratio based on the optimal configuration of the voltage adjustment amount and transformer turns ratio, and adjusts the turns ratio between the primary and secondary windings based on the transformer turns ratio; after each adjustment, it monitors the voltage change again to ensure that the current voltage level is within the safe range.

[0023] Therefore, this application has at least the following beneficial effects:

[0024] This application embodiment comprises a distributed thermal-solar power generation system, an energy storage regulation system, a hydrogen production cycle system, and electrical loads forming a "thermal-solar-storage-hydrogen" park distribution network. Under both conventional and islanded operation modes, the "thermal-solar-storage-hydrogen" park distribution network's regulation system optimizes power supply, achieving power balance, stable voltage and frequency, reliable power supply, and optimized power quality. When distributed thermal power generation and distributed photovoltaic power generation are combined as power sources and assisted by the energy storage regulation unit to form a power supply, the advantages of traditional and new energy sources can be complemented. Energy storage plays different roles in different "thermal-solar-storage-hydrogen" distribution networks. The distributed thermal-solar power generation system, energy storage regulation system, and hydrogen production cycle system work together to produce hydrogen from excess energy, and the hydrogen energy is recycled and reused to form hydrogen energy storage, fully realizing multi-energy complementarity.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0027] Figure 1 This is a schematic diagram of the overall structure of a multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system according to an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the specific structure of the energy storage regulation system of the multi-energy complementary "fire-solar-storage-hydrogen" park power distribution network system provided in the embodiments of this application;

[0029] Figure 3 This is a schematic diagram of the specific structure of the voltage regulation system of the multi-energy complementary "fire-solar-storage-hydrogen" park power distribution network system provided in the embodiments of this application;

[0030] Figure 4 This is a flowchart of a control method for a multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system provided according to an embodiment of this application. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0032] The following description, with reference to the accompanying drawings, illustrates a multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system and control method according to embodiments of this application.

[0033] Figure 1 This is a schematic diagram of the overall structure of a multi-energy complementary "fire-solar-storage-hydrogen" park power distribution network system provided in an embodiment of this application.

[0034] like Figure 1 As shown, the multi-energy complementary "fire-solar-storage-hydrogen" park power distribution network system includes:

[0035] The power generation system includes a distributed thermal power generation unit and a solar power generation unit, which are composed of distributed thermal power generation units and solar power generation units, and generate electricity based on the distributed thermal power generation units and solar power generation units.

[0036] Energy storage regulation system is used to call the corresponding energy storage system to perform corresponding power generation, hydrogen energy storage or distribution network voltage and power balancing operations under different target operating modes;

[0037] The hydrogen production cycle system uses the electrical energy stored in the energy storage and regulation system to produce hydrogen, stores the hydrogen in hydrogen tanks and converts it into hydrogen energy, and uses the stored hydrogen energy to regulate the voltage and power balance of the power distribution network.

[0038] The control system acquires load data of the park's power distribution network, determines the target operating mode of the park's power distribution network based on the load data, and adjusts the power generation system, energy storage regulation system, and hydrogen production cycle system according to the target operating mode.

[0039] It should be noted that thermal power generation units are mainly responsible for providing a stable power output when solar energy resources are unavailable or insufficient. This usually includes traditional energy facilities such as gas turbines or coal-fired power plants. Solar power generation units mainly use solar photovoltaic technology to convert solar radiation into electrical energy. This clean energy can generate a large amount of electricity during the day, especially when there is plenty of sunshine.

[0040] Energy storage regulation systems are not only used to store excess electrical energy, such as daytime peak energy from solar power generation units, but also to enhance grid stability in the following ways: (1) Frequency regulation: quickly respond to frequency fluctuations in the grid to help maintain grid frequency stability; (2) Voltage support: provide reactive power support by adjusting the charging and discharging state of energy storage devices to maintain grid voltage levels.

[0041] The control system can determine the optimal operating mode and resource allocation strategy based on real-time load data and predictive models. Taking into account multiple factors such as cost, environmental impact, and reliability, it seeks the optimal solution to meet the needs at different time scales and makes rapid adjustments according to the actual situation.

[0042] Specifically, through multi-energy complementarity, intelligent control, and hydrogen energy closed-loop, not only can the synergistic optimization of power supply reliability, energy efficiency, and environmental protection be achieved, improving energy utilization efficiency and reducing dependence on a single energy source, but also the goals of power balance, stable distribution network voltage and frequency, reliable power supply, and optimized power quality can be achieved.

[0043] like Figure 2 As shown in the embodiments of this application, the energy storage regulation system includes a first energy storage system, a second energy storage system, and a third energy storage system. The first energy storage system is composed of a lithium iron phosphate battery pack, the second energy storage system is composed of a nickel-metal hydride battery pack, and the third energy storage system is composed of a supercapacitor pack.

[0044] Specifically, the first energy storage system is used to: regulate the total current output of the lithium iron phosphate battery packs in the first energy storage system during normal operation of the distribution network, smooth the power generation output of the power generation system, and make the output voltage of the power generation system approach a sinusoidal alternating current. The second energy storage unit is connected to a water electrolysis hydrogen production device, used to store excess electrical energy in the second energy storage system and start the hydrogen production cycle to convert it into hydrogen energy storage during off-peak periods in normal operation of the distribution network. The third energy storage unit is used to regulate power balance during islanded operation of the distribution network.

[0045] It should be noted that the first energy storage system smooths the power output of the power generation system by adjusting the total current output of the lithium iron phosphate battery pack, ensuring that the output voltage of the power generation system is as close as possible to the ideal sinusoidal AC waveform. Among them, the lithium iron phosphate battery has a long life, high safety and good charge and discharge efficiency, which helps to improve power quality and reduce the impact on the power grid.

[0046] The second energy storage system is primarily used to store excess electrical energy during off-peak periods and support the operation of the hydrogen production cycle system. Nickel-metal hydride batteries, with their good durability and high energy density, are suitable for long-term energy storage. When the grid is in normal operating mode and the load is low, the second energy storage system collects excess electrical energy and uses it to start the water electrolysis hydrogen production unit, converting electrical energy into hydrogen energy for storage. This not only solves the problem of wasted electricity during off-peak hours but also provides the grid with an effective long-term energy storage method, increasing the diversity of energy storage and facilitating more flexible energy management strategies.

[0047] The third energy storage system is particularly suitable for rapid response needs in the event of emergencies or in islanded operation modes. Its supercapacitors, capable of extremely rapid charging and discharging, are ideal for short-term power compensation. When the distribution network enters islanded operation mode, the third energy storage system quickly adjusts the power balance to ensure the continuity and security of power supply to critical loads.

[0048] The multi-energy complementary "thermal-solar-storage-hydrogen" park distribution network system proposed in this application consists of a distributed thermal-solar power generation system, an energy storage regulation system, a hydrogen production cycle system, and electrical loads. Under both conventional and islanded operation modes, the regulation system of the "thermal-solar-storage-hydrogen" park distribution network optimizes power regulation, achieving power balance, stable voltage and frequency of the distribution network, reliable power supply, and optimized power quality. When distributed thermal power generation and distributed photovoltaic power generation are combined as power sources and assisted by the energy storage regulation unit to form a power supply, the advantages of traditional energy and new energy can be complemented. Energy storage plays different roles in different "thermal-solar-storage-hydrogen" distribution networks. The distributed thermal-solar power generation system, energy storage regulation system, and hydrogen production cycle system cooperate to produce hydrogen from excess energy and recycle hydrogen energy to form hydrogen energy storage, fully realizing multi-energy complementarity.

[0049] Figure 4 This is a flowchart of a control method for a multi-energy complementary "fire-solar-storage-hydrogen" park power distribution network system according to an embodiment of this application.

[0050] like Figure 4 As shown, the control method for the multi-energy complementary "thermal-solar-storage-hydrogen" park distribution network system is applied to the multi-energy complementary "thermal-solar-storage-hydrogen" park distribution network of the above embodiment. The method includes the following steps:

[0051] Step S101: Obtain load data of the park's power distribution network.

[0052] It should be noted that this application can collect real-time power consumption information through smart meters and other monitoring devices installed in the park's power distribution network. This data includes, but is not limited to, power consumption for each time period, peak load time, and average load. The data is then processed and analyzed using IoT technology and a big data analytics platform to obtain accurate load curves and trend predictions.

[0053] Step S102: Determine the target operation mode of the park's power distribution network based on the load data.

[0054] It should be noted that the target operating mode includes normal operating mode and islanded operating mode.

[0055] Specifically, based on the data collected in step S101, high-load periods, low-load periods, and possible peak demand are identified; combined with weather forecasts (for solar-dependent cases), historical data, and current system status, the most suitable operating mode for different time periods is evaluated.

[0056] Step S103: Dispatch the power generation system, energy storage regulation system and hydrogen production cycle system according to the target operation mode.

[0057] Specifically, (1) Power generation system: Adjust the operating parameters of thermal power generation unit and solar power generation unit, for example, increase thermal power generation output during high load periods and maximize solar power generation efficiency during sunny days.

[0058] (2) Energy storage regulation system: It determines whether to charge or discharge the first, second or third energy storage system based on the load conditions. For example, it charges the nickel-metal hydride battery pack and starts the hydrogen production process during low load periods; and releases the energy of the lithium iron phosphate battery pack to smooth the load during high load periods.

[0059] (3) Hydrogen production cycle system: The hydrogen production process is usually started during the off-peak period to convert excess electrical energy into hydrogen energy for storage, so that it can be used as a backup energy source or for peak shaving in the future.

[0060] In this embodiment of the application, controlling the power generation system, energy storage regulation system, and hydrogen production cycle system according to the target operating mode includes: if the target operating mode is a normal operating mode, the power generation system, energy storage regulation system, and hydrogen production cycle system generate electricity; if the target operating mode is an islanded operating mode, the active power balance is regulated by the third energy storage system of the energy storage regulation system and the reactive power balance is regulated by the SVG.

[0061] Specifically, normal operating mode:

[0062] (1) Power generation system: Under normal operating conditions, the thermal power generation unit and the solar power generation unit are adjusted according to load demand. For example, solar power generation is given priority during the day, and thermal power generation output is increased at night or when weather conditions are poor.

[0063] (2) Energy Storage and Regulation System: The first energy storage system (lithium iron phosphate battery pack) is used to smooth the output of the power generation system and ensure grid voltage stability. The second energy storage system (nickel-metal hydride battery pack) stores excess electrical energy during off-peak periods and starts the water electrolysis hydrogen production device to convert electrical energy into hydrogen energy for storage. The third energy storage system (supercapacitor pack) serves as a backup in this mode, ready to deal with any emergencies.

[0064] (3) Hydrogen production cycle system: Hydrogen is produced by electrolyzing water using the electrical energy stored in the second energy storage system. The produced hydrogen can be stored and converted back into electrical energy when needed.

[0065] Isolated operation mode:

[0066] (1) Energy storage regulation system: In islanded mode, the third energy storage system (supercapacitor bank) plays a key role, responding quickly and regulating the active power balance to maintain the stable operation of the power grid. Static var generators are used to adjust reactive power in real time, maintain the grid voltage level, and ensure power quality.

[0067] (2) Other systems: Since islanded mode is typically used to respond to emergencies or unplanned grid outages, the operation of power generation and hydrogen production cycle systems may be limited. The focus is on maintaining existing energy reserves and minimizing unnecessary energy consumption.

[0068] In this embodiment of the application, if the target operating mode is the normal operating mode, the power generation system, the first energy storage system of the energy storage regulation system, and the hydrogen production cycle system generate electricity, including: if the current time is during the peak electricity consumption period, the power generation system and the energy storage regulation system generate electricity, and the excess electricity is stored in the second energy storage unit of the energy storage regulation system; if the current time is during the off-peak electricity consumption period, the excess electricity is stored in the second energy storage unit to produce hydrogen and store it in a hydrogen tank to form hydrogen energy storage.

[0069] Specifically, peak electricity consumption periods (high load periods) under normal operating conditions:

[0070] (1) Power generation system: Thermal power generation units and solar power generation units operate at full capacity to meet peak demand. In particular, when solar energy resources are abundant, solar power generation units are used first to reduce dependence on traditional energy sources.

[0071] (2) Energy Storage and Regulation System: The first energy storage system (lithium iron phosphate battery pack): primarily used to smooth the output of the power generation system, ensuring the stability and continuity of power supply and avoiding voltage fluctuations caused by the intermittency of renewable energy sources. The second energy storage system (nickel-metal hydride battery pack): stores excess energy when power generation exceeds current demand. This helps alleviate grid pressure and prepares for subsequent low-load periods.

[0072] Off-peak electricity consumption periods (low load periods) under normal operating conditions:

[0073] (1) Power generation system: Reduce the output of thermal power generation unit appropriately according to actual needs, and maximize the use of electrical energy generated by solar power generation unit.

[0074] (2) Energy Storage and Regulation System: Second Energy Storage System (NiMH Battery Pack): Absorbs excess electrical energy when power demand is low. This electrical energy can then be used to start the water electrolysis hydrogen production unit, converting electrical energy into hydrogen energy and storing it in hydrogen tanks to form hydrogen energy storage. Third Energy Storage System (Supercapacitor Pack): Serves as a backup, providing rapid energy response when necessary, but is mainly used to maintain standby status during this stage.

[0075] In this embodiment of the application, before adjusting the balance of active and reactive power through the third energy storage system, the process includes: detecting whether the output frequency and output voltage of the distribution network deviate from the corresponding preset safety range; if the output frequency and output voltage deviate from the preset safety range, calculating the change value of active power and the change value of reactive power; adjusting the active power according to the change value of frequency and adjusting the reactive power according to the change value of voltage until the output frequency and output voltage are within the preset safety range; and the voltage regulation system assists in adjusting the voltage magnitude.

[0076] The formula for calculating the change in active power is as follows:

[0077]

[0078] Where Δp is the change in the active power of the capacitor bank. f is the rate of change of the capacitor bank's frequency, θ is the proportion of the capacitor bank involved in frequency modulation, and f n The rated frequency is ΔE, and the change in power of the capacitor bank is ΔE.

[0079] The formula for calculating the change in output voltage is:

[0080]

[0081] Where X is the line reactance, Q is the reactive power, V is the output voltage of the distribution network, and β is the proportion of SVG participating in voltage regulation.

[0082] Specifically, this application requires real-time monitoring of the output frequency and voltage of the distribution network to ensure they remain within a preset safety range. If the output frequency or voltage deviates from the set safety range, it is necessary to identify the relevant parameters of the distribution network and calculate the corresponding changes in active power and output voltage. Based on the calculated Δp, the supercapacitor of the third energy storage system is charged and discharged to adjust the active power level in the grid. The reactive power is adjusted using SVG based on the calculated ΔV to stabilize the grid voltage. The voltage regulation system further fine-tunes the voltage to ensure that the final output voltage is within a safe range, thereby improving the overall stability of the grid.

[0083] In this embodiment of the application, after adjusting the reactive power balance through SVG, the process includes: adjusting the switching of thyristors by combining high-voltage and low-voltage circuits to adjust the voltage amplitude; the voltage control system monitors the voltage amplitude in real time and calculates the optimal value for voltage amplitude adjustment; controlling the switching of thyristors to select the corresponding number of transformer turns for switching on and off, adjusting the voltage to stabilize, and simultaneously adjusting the reactive power to maintain reactive power balance. The specific steps are as follows:

[0084] The system acquires voltage, current, and power parameters for each node in the distribution network; analyzes whether the current voltage level deviates from the set safe range based on these parameters; if so, it uses an optimization algorithm to calculate the optimal configuration of the corresponding voltage adjustment and transformer turns ratio; it controls the energy storage regulation system to send commands to the thyristors to adjust their trigger angle or fully open / close them; it determines the transformer turns ratio based on the optimal configuration of the voltage adjustment and transformer turns ratio, and adjusts the turns ratio between the primary and secondary windings accordingly. After each adjustment, it monitors the voltage change again to ensure the current voltage level is within the safe range.

[0085] It should be noted that, as Figure 3 As shown, this application uses a voltage regulation system to assist in adjusting the voltage level. Specifically, it monitors and acquires voltage parameters (such as voltage amplitude and phase), current parameters (such as current intensity and phase), and power parameters (such as active power and reactive power) of each node in the distribution network in real time. Based on the collected data, it uses data analysis tools to assess whether the current voltage level deviates from the set safe range. If the voltage level is detected to deviate from the safe range, it uses an optimization algorithm to calculate the required voltage adjustment amount and the optimal configuration of the transformer turns ratio. The optimization algorithm can be a genetic algorithm, particle swarm optimization, etc.

[0086] By controlling the thyristor conduction angle, the voltage amplitude is adjusted. When the voltage deviation exceeds a preset threshold, full-on / full-off control is executed. The transformer turns are switched via thyristor valve groups to avoid arc losses. After each adjustment, the system monitors voltage changes again to ensure the current voltage level is within a safe range. If a deviation still exists, the above process is repeated until the ideal state is reached. This achieves high-precision voltage regulation through thyristors, with real-time feedback and iterative optimization to ensure long-term stability of voltage and reactive power.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0088] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0089] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0090] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or more of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0091] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium. When executed, the program includes one or a combination of the steps of the method embodiments.

Claims

1. A control method for a multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system, characterized in that, Includes the following steps: Obtain load data for the park's power distribution network; The target operating mode of the park's power distribution network is determined based on the load data. Control the power generation system, energy storage regulation system, and hydrogen production cycle system according to the target operating mode; The step of controlling the power generation system, the energy storage regulation system, and the hydrogen production cycle system according to the target operating mode includes: If the target operating mode is the normal operating mode, then the power generation system, the energy storage regulation system, and the hydrogen production cycle system will generate electricity; If the target operating mode is an islanded operating mode, the active power balance is adjusted by the third energy storage system of the energy storage regulation system and the reactive power balance is adjusted by the SVG. After adjusting the reactive power balance via SVG, the following is included: The voltage amplitude is adjusted by combining high-voltage and low-voltage circuits to control the switching of the thyristor. The voltage control system monitors the voltage amplitude in real time and calculates the optimal value for voltage amplitude adjustment; The switching on and off of the thyristors is controlled to select the corresponding number of transformer turns to be switched on and off, thereby regulating voltage stability and adjusting reactive power to maintain reactive power balance. The specific steps are as follows: Obtain the voltage, current, and power parameters of each node in the distribution network; Analyze whether the current voltage level deviates from the set safe range based on the voltage, current, and power parameters. If the current voltage level deviates from the set safety range, an optimization algorithm is used to calculate the optimal configuration of the corresponding voltage adjustment amount and transformer turns ratio; The control energy storage regulation system sends commands to the thyristor to adjust the trigger angle of the thyristor, or to fully turn the thyristor on / off; The transformer turns ratio is determined based on the optimal configuration of the voltage adjustment amount and the transformer turns ratio, and the turns ratio between the primary winding and the secondary winding is adjusted according to the transformer turns ratio. After each adjustment, the voltage change is monitored again to ensure that the current voltage level is within a safe range.

2. The control method for the multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system according to claim 1, characterized in that, If the target operating mode is a normal operating mode, then the power generation system, the first energy storage system of the energy storage regulation system, and the hydrogen production cycle system generate electricity, including: If the current time is during the peak electricity consumption period, the power generation system and the energy storage regulation system are used to generate electricity, and the excess electricity is stored in the second energy storage system of the energy storage regulation system; If the current time is a period of low electricity demand, the excess electrical energy will be stored in the second energy storage system to produce hydrogen, which will then be stored in hydrogen tanks to form hydrogen energy storage.

3. The control method for the multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system according to claim 1, characterized in that, Before adjusting the balance of active and reactive power through the third energy storage system, the following steps are included: Detect whether the output frequency and output voltage of the power distribution network deviate from the corresponding preset safety range; If the output frequency and the output voltage deviate from the preset safety range, the change in active power and the change in reactive power are calculated. The active power is adjusted according to the change in frequency, and the reactive power is adjusted according to the change in voltage, until the output frequency and the output voltage are within a preset safe range; the voltage regulation system assists in adjusting the voltage magnitude.

4. The control method for the multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system according to claim 3, characterized in that, The formula for calculating the change in active power is: ； in, This represents the change in active power of the capacitor bank. This represents the rate of change of the capacitor bank's frequency. This represents the proportion of the capacitor bank involved in frequency modulation. For the rated frequency, This represents the change in power of the capacitor bank.

5. The control method for the multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system according to claim 3, characterized in that, The formula for calculating the change in output voltage is: Where X is the line reactance, Q is the reactive power, and V is the output voltage of the distribution network. .

6. A multi-energy complementary "thermal-solar-storage-hydrogen" industrial park power distribution network system, used to implement the control method of the multi-energy complementary "thermal-solar-storage-hydrogen" industrial park power distribution network system as described in any one of claims 1-5, characterized in that, include: A power generation system, wherein the power generation system comprises a distributed thermal power generation unit and a solar power generation unit, forming a distributed thermal-solar hybrid power generation system, and generates electricity based on the distributed thermal power generation unit and the solar power generation unit; Energy storage regulation system is used to call the corresponding energy storage system to perform corresponding power generation, hydrogen energy storage or distribution network voltage and power balancing operations under different target operating modes; The hydrogen production cycle system uses the electrical energy stored in the energy storage and regulation system to produce hydrogen, stores the hydrogen in a hydrogen tank and converts it into hydrogen energy, and uses the stored hydrogen energy to regulate the voltage and power balance of the power distribution network. The control system acquires load data of the park's power distribution network, determines the target operating mode of the park's power distribution network based on the load data, and adjusts the power generation system, the energy storage regulation system, and the hydrogen production cycle system according to the target operating mode.

7. The multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system according to claim 6, characterized in that, The energy storage and regulation system includes a first energy storage system, a second energy storage system, and a third energy storage system, wherein, The first energy storage system consists of a lithium iron phosphate battery pack, the second energy storage system consists of a nickel-metal hydride battery pack, and the third energy storage system consists of a supercapacitor pack.

8. The multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system according to claim 7, characterized in that, The first energy storage system is used to: adjust the total current output of the lithium iron phosphate battery pack in the first energy storage system during normal operation of the distribution network, smooth the power generation output of the power generation system, and make the output voltage of the power generation system approach the sinusoidal alternating current.

9. The multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system according to claim 7, characterized in that, The second energy storage system is connected to the water electrolysis hydrogen production device. During the off-peak period of the power distribution network under normal operating conditions, excess electrical energy is stored in the second energy storage system and the hydrogen production cycle is started to convert it into hydrogen energy storage.

10. The multi-energy complementary "fire-solar-storage-hydrogen" industrial park power distribution network system according to claim 7, characterized in that, The third energy storage system is used to regulate power balance when the distribution network is in islanded operation mode.

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