A method for coordinated control of a wind farm and hydrogen production integrated system

Abstract

The application discloses a kind of wind farm and hydrogen production integrated system coordinated control method, belong to control method technical field, method includes: to wind turbine is installed and modeling, obtains wind turbine operation model;Hydrogen production system is installed and modeling, obtains hydrogen production system operation model;According to the wind turbine operation model and hydrogen production system operation model, wind farm and hydrogen production integrated system are installed in parallel, constitute parallel system;The parallel system is installed to the coordinated controller, to realize wind farm and hydrogen production integrated system coordinated control.The method can solve the problem that the current parallel system consisting of wind farm and hydrogen production system cannot fully smooth wind farm output and continuously produce hydrogen while maintaining high capacity factor of hydrogen production system.

Description

Technical Field

[0001] This invention relates to a coordinated control method for an integrated wind farm and hydrogen production system, belonging to the technical field of control methods. Background Technology

[0002] Due to the energy crisis, global warming, and other environmental issues, the penetration rate of renewable energy generation in power systems is rapidly increasing. Wind power, in particular, is widely used due to its cleanliness, sustainability, and cost-effectiveness. However, power systems, including large wind farms, face power quality degradation issues such as frequency and voltage fluctuations. Because wind farm output fluctuates constantly due to changes in wind speed, supply-demand imbalances caused by these fluctuations can lead to power outages. Energy storage systems can mitigate these output fluctuations, but due to their limited energy capacity, they are difficult to store excess power from wind farms for extended periods.

[0003] Today, hydrogen is receiving increasing attention as an alternative energy source to fossil fuels due to environmental concerns. Hydrogen production systems comprised of electrolyzers have garnered significant interest. Electrolyzers produce hydrogen through the electrolysis of water, utilizing energy obtained from renewable energy generation. Therefore, hydrogen production systems are suitable for long-term absorption of excess wind farm output. Furthermore, the rated power and energy capacity of hydrogen production systems can be independently designed, enabling the implementation of large-scale wind farms and the production of alternative sources to fossil fuels.

[0004] Currently, grid-connected systems consisting of wind farms and hydrogen production systems cannot adequately smooth the output of wind farms and continuously produce hydrogen while maintaining a high capacity factor for the hydrogen production system. Therefore, we need to innovate existing methods. Summary of the Invention

[0005] The purpose of this invention is to provide a coordinated control method for an integrated wind farm and hydrogen production system, which can solve the problems that current grid-connected systems composed of wind farms and hydrogen production systems cannot fully smooth the output of wind farms and continuously produce hydrogen while maintaining a high capacity factor of the hydrogen production system.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A coordinated control method for an integrated wind farm and hydrogen production system includes:

[0008] Install and model the wind turbine to obtain the wind turbine operation model;

[0009] Install and model the hydrogen production system to obtain its operational model;

[0010] Based on the wind turbine operation model and the hydrogen production system operation model, the integrated wind farm and hydrogen production system are connected to the grid to form a grid-connected system.

[0011] A coordinating controller is installed in the grid-connected system to achieve coordinated control of the integrated wind farm and hydrogen production system.

[0012] Furthermore, the installation and modeling of wind turbine units includes the installation and modeling of variable speed turbine wind turbines.

[0013] Furthermore, the installation and modeling of the hydrogen production system includes the installation and modeling of the electrolyzer.

[0014] Furthermore, the wind turbine operating model is shown in formula (1):

[0015]

[0016] In formula (1), i is the fan number, i = 1, 2, ..., n, and n is the total number of fans. Let ρ be the wind force captured by the i-th wind turbine, ρ be the radius of the wind turbine blade, R be the air density, and V be the wind force captured by the i-th wind turbine. i Let C be the wind speed at the i-th fan. pi Let β be the power coefficient of the i-th wind turbine. i Let λ be the blade pitch angle of the i-th wind turbine. i Let be the tip velocity ratio of the i-th fan. Let ω be the conversion efficiency coefficient of the i-th wind turbine. i Let ω be the rotor angular frequency of the i-th fan. ipu Let H be the rotor angular frequency of the i-th fan unit. J It is the inertial constant. For the wind force captured by the i-th wind turbine unit, P ipu Let be the output power of the i-th fan unit. The maximum power point tracking output reference for the i-th wind turbine is provided. For the optimal tip velocity ratio, For maximum power coefficient, P serves as the power maximum point tracking output reference for the i-th wind turbine unit. n This provides the rated power output for the wind farm.

[0017] Furthermore, the operating model of the hydrogen production system is shown in formula (2):

[0018]

[0019] In formula (2), I dc V is the output current in the DC-DC converter. dc E0 is the output voltage of the DC-DC converter, R0 is the internal voltage of the electrolyzer, H is the resistance of the resistor, and H is the hydrogen flow rate into the electrolyzer. P represents the total hydrogen flow rate of the hydrogen production system, η represents the overall efficiency of the hydrogen production system converter, and P represents the total hydrogen flow rate of the hydrogen production system converter. H τ represents the power supply of the AC-DC converter, Capacity factor represents the capacity coefficient of the hydrogen production system, and τ represents the simulation period.

[0020] Furthermore, in the grid-connected system, both the wind farm and the hydrogen production system are connected to the power grid; the wind farm supplies power to the power grid and generates hydrogen in the hydrogen production system; the hydrogen production system uses the excess electrical energy output by the wind farm to generate hydrogen.

[0021] Furthermore, the coordination controller includes an FLF controller for extracting the power fluctuation components of the wind farm output, a kinetic energy controller for the wind farm, and a virtual discharge controller for the hydrogen production system.

[0022] Furthermore, the kinetic energy controller compensates for the positive fluctuation component of the output power fluctuation component of the wind farm, and the kinetic energy control compensation formula is shown in formula (3):

[0023]

[0024] In formula (3), P i ref The compensation amount generated for the kinetic energy controller. For the maximum power point tracking output reference of the wind farm, P is the positive fluctuation component of the output power fluctuation component of the wind farm. WF P represents the output power of the wind farm. i Let be the output power of the i-th fan.

[0025] Furthermore, the virtual discharge controller compensates for the negative fluctuation component of the wind farm's output power fluctuation component. The virtual discharge control compensation formula is shown in formula (4):

[0026]

[0027] In formula (4), The compensation amount P generated for the virtual discharge controller b The constant power provided to the wind farm, ΔP WF P is the negative fluctuation component of the wind farm's output power fluctuation component. g For internet access power, P FLF This refers to the output power of the FLF controller.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] The present invention provides a coordinated control method for an integrated wind farm and hydrogen production system. This method involves grid-connecting the integrated wind farm and hydrogen production system to the power grid. In this grid-connected system, both the wind farm and the hydrogen production system are connected to the power grid. The wind farm supplies power to the grid while simultaneously generating hydrogen in the hydrogen production system. When the hydrogen production system uses excess electrical energy from the wind farm to produce hydrogen, it can mitigate output fluctuations in the wind farm and maintain a high capacity factor in the hydrogen production system. In the coordinated controller provided by this invention, the wind farm does not excessively release kinetic energy, and its output fluctuations are effectively mitigated. Since the hydrogen production system does not need to consume all the fluctuating components of the wind farm's output, it does not require a hydrogen production system with a large rated power, thereby improving the capacity factor of the hydrogen production system. The coordinated controller provided by this invention can overcome the problems of wind farm output fluctuations, the inability of the hydrogen production system to continuously produce hydrogen, and the decrease in capacity factor when the grid-connected system is operating. It achieves stable wind farm output during coordinated operation of the wind farm and the hydrogen production system, while maintaining a high capacity factor and continuously producing hydrogen. Attached Figure Description

[0030] Figure 1 This is a flowchart of a coordinated control method for an integrated wind farm and hydrogen production system provided in an embodiment of the present invention. Detailed Implementation

[0031] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0032] The embodiments of this patent are described in detail below. Examples of these 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 are only used to explain this patent, and should not be construed as limiting this patent. Unless otherwise specified, the embodiments of this application and the technical features within them can be combined with each other.

[0033] Example 1:

[0034] Figure 1 This is a flowchart illustrating a coordinated control method for an integrated wind farm and hydrogen production system according to Embodiment 1 of the present invention. This flowchart only shows the logical sequence of the method in this embodiment; however, in other possible embodiments of the present invention, different methods may be used, provided there are no conflicts. Figure 1 Complete the steps shown or described in the order indicated.

[0035] See Figure 1 The method in this embodiment specifically includes the following steps:

[0036] Step 1: Install and model the wind turbine to obtain the wind turbine operation model;

[0037] The installation and modeling of wind turbine units includes the installation and modeling of variable speed turbine wind turbines.

[0038] The wind turbine operating model is shown in formula (1):

[0039]

[0040] In formula (1), i is the fan number, i = 1, 2, ..., n, and n is the total number of fans. Let ρ be the wind force captured by the i-th wind turbine, ρ be the radius of the wind turbine blade, R be the air density, and V be the wind force captured by the i-th wind turbine. i Let C be the wind speed at the i-th fan. pi Let β be the power coefficient of the i-th wind turbine. i Let λ be the blade pitch angle of the i-th wind turbine. i Let be the tip velocity ratio of the i-th fan. Let ω be the conversion efficiency coefficient of the i-th wind turbine. i Let ω be the rotor angular frequency of the i-th fan. ipu Let H be the rotor angular frequency of the i-th fan unit. J It is the inertial constant. For the wind force captured by the i-th wind turbine unit, P ipu Let be the output power of the i-th fan unit. The maximum power point tracking output reference for the i-th wind turbine is provided. For the optimal tip velocity ratio, For maximum power coefficient, P serves as the power maximum point tracking output reference for the i-th wind turbine unit. n This provides the rated power output for the wind farm.

[0041] Step 2: Install and model the hydrogen production system to obtain the operating model of the hydrogen production system;

[0042] The installation and modeling of the hydrogen production system includes the installation and modeling of the electrolyzer.

[0043] The operating model of the hydrogen production system is shown in formula (2):

[0044]

[0045] In formula (2), I dc V is the output current in the DC-DC converter. dc E0 is the output voltage of the DC-DC converter, R0 is the internal voltage of the electrolyzer, H is the resistance of the resistor, and H is the hydrogen flow rate into the electrolyzer. P represents the total hydrogen flow rate of the hydrogen production system, η represents the overall efficiency of the hydrogen production system converter, and P represents the total hydrogen flow rate of the hydrogen production system converter. Hτ represents the power supply of the AC-DC converter, Capacity factor represents the capacity coefficient of the hydrogen production system, and τ represents the simulation period.

[0046] Step 3: Based on the wind turbine operation model and the hydrogen production system operation model, install the integrated wind farm and hydrogen production system to form a grid-connected system;

[0047] A grid-connected integrated wind farm and hydrogen production system is installed, where both the wind farm and the hydrogen production system are connected to the power grid. The wind farm supplies power to the grid while simultaneously generating hydrogen in the hydrogen production system. When the hydrogen production system uses excess electricity from the wind farm to produce hydrogen, it can mitigate output fluctuations from the wind farm and maintain a high capacity factor in the hydrogen production system.

[0048] Step 4: Install a coordinating controller for the grid-connected system to achieve coordinated control of the wind farm and hydrogen production integrated system;

[0049] The coordination controller includes an FLF controller for extracting the power fluctuation components of the wind farm output, a kinetic energy controller for the wind farm, and a virtual discharge controller for the hydrogen production system.

[0050] The kinetic energy controller compensates for the positive fluctuation component of the wind farm's output power fluctuation component. The kinetic energy control compensation formula is shown in formula (3):

[0051]

[0052] In formula (3), P i ref The compensation amount generated for the kinetic energy controller. For the maximum power point tracking output reference of the wind farm, P is the positive fluctuation component of the output power fluctuation component of the wind farm. WF P represents the output power of the wind farm. i Let be the output power of the i-th fan.

[0053] Since the kinetic energy controller can only compensate for the positive fluctuations in wind volume of the wind farm's output power fluctuation component, the wind turbine will not release excessive kinetic energy. When the wind farm is operating on the basis of maximum power point tracking, although the use of the kinetic energy control strategy will reduce the output efficiency of the wind turbine, the wind farm's operating efficiency will be improved compared to not using the kinetic energy control strategy.

[0054] The virtual discharge controller compensates for the negative fluctuation component of the wind farm's output power fluctuation component. The virtual discharge control compensation formula is shown in formula (4):

[0055]

[0056] In formula (4), The compensation amount P generated for the virtual discharge controller b The constant power provided to the wind farm, ΔP WF P is the negative fluctuation component of the wind farm's output power fluctuation component. g For internet access power, P FLF This refers to the output power of the FLF controller.

[0057] Hydrogen storage systems utilize the negative fluctuation components released from the constant power provided by wind farms to supply stable power to the grid.

[0058] The coordinated control method for an integrated wind farm and hydrogen production system provided in this embodiment involves grid-connecting the integrated wind farm and hydrogen production system. In this grid-connected system, both the wind farm and the hydrogen production system are connected to the power grid. The wind farm supplies power to the grid while simultaneously generating hydrogen in the hydrogen production system. When the hydrogen production system uses excess electricity from the wind farm to produce hydrogen, it can mitigate output fluctuations in the wind farm and maintain a high capacity factor in the hydrogen production system. The coordinated controller provided in this embodiment not only smooths the wind farm's output but also ensures uninterrupted hydrogen production. This overcomes the problems of wind farm output fluctuations, discontinuous hydrogen production, and capacity factor decline that occur when the grid-connected system of wind farm and hydrogen production system is operating. It achieves stable wind farm output and continuous hydrogen production while maintaining a high capacity factor in the hydrogen production system during coordinated operation of the wind farm and hydrogen production system.

[0059] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A coordinated control method for an integrated wind farm and hydrogen production system, characterized in that, include: Install and model the wind turbine to obtain the wind turbine operation model; Install and model the hydrogen production system to obtain its operational model; Based on the wind turbine operation model and the hydrogen production system operation model, the integrated wind farm and hydrogen production system are connected to the grid to form a grid-connected system. A coordination controller is installed in the grid-connected system to achieve coordinated control of the integrated wind farm and hydrogen production system; The wind turbine operating model is shown in formula (1): （1）； In formula (1), Number the wind turbine. , This represents the total number of wind turbines. For the first The wind power captured by each wind turbine The radius of the wind turbine blades. air density, For the first Wind speed at each fan. For the first The power coefficient of each fan. For the first The blade pitch angle of each wind turbine For the first The tip speed ratio of each fan blade is... For the first The conversion efficiency coefficient of each fan. For the first The rotor angular frequency of a fan For the first The rotor angular frequency of each fan unit It is the inertial constant. For the first The wind force captured by each wind turbine unit For the first Output power of each fan unit For the first The maximum power point tracking output reference for each fan. For the optimal tip velocity ratio, For maximum power coefficient, For the first The maximum power point tracking output reference for each fan unit. The rated power output of the wind farm; The operating model of the hydrogen production system is shown in formula (2): （2）； In formula (2), The output current in a DC-DC converter. The output voltage in a DC-DC converter. This refers to the internal voltage of the electrolytic cell. The resistance value of the resistor. This refers to the flow rate of hydrogen entering the electrolyzer. This represents the total hydrogen flow rate of the hydrogen production system. For the overall efficiency of the hydrogen production system converter, The power supply for the AC-DC converter, The capacity factor of the hydrogen production system. The simulation cycle; The coordination controller includes an FLF controller for extracting the power fluctuation components of the wind farm output, a kinetic energy controller for the wind farm, and a virtual discharge controller for the hydrogen production system. The kinetic energy controller compensates for the positive fluctuation component of the output power fluctuation component of the wind farm. The kinetic energy control compensation formula is shown in formula (3): （3）； In formula (3), The compensation amount generated for the kinetic energy controller. For the maximum power point tracking output reference of the wind farm, This represents the positive fluctuation component of the wind farm's output power fluctuation component. For the output power of the wind farm, For the first The output power of each fan.

2. The coordinated control method for the integrated wind farm and hydrogen production system according to claim 1, characterized in that, The installation and modeling of wind turbine units includes the installation and modeling of variable speed turbine wind turbines.

3. The coordinated control method for the integrated wind farm and hydrogen production system according to claim 1, characterized in that, The installation and modeling of the hydrogen production system includes the installation and modeling of the electrolyzer.

4. The coordinated control method for the integrated wind farm and hydrogen production system according to claim 1, characterized in that, In the grid-connected system, both the wind farm and the hydrogen production system are connected to the power grid; the wind farm supplies power to the power grid and generates hydrogen in the hydrogen production system; the hydrogen production system uses the excess electrical energy output by the wind farm to generate hydrogen.

5. The coordinated control method for the integrated wind farm and hydrogen production system according to claim 1, characterized in that, The virtual discharge controller compensates for the negative fluctuation component of the output power fluctuation component of the wind farm. The virtual discharge control compensation formula is shown in formula (4): （4）； In formula (4), The compensation amount generated for the virtual discharge controller. The constant power supplied to the wind farm This represents the negative fluctuation component of the wind farm's output power fluctuation component. For internet access power, This refers to the output power of the FLF controller.

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