A dynamic operation simulation method of an umbrella ladder type land-based high-altitude wind power generation system

Abstract

The present disclosure relates to a dynamic operation simulation method of an umbrella ladder type land-based high-altitude wind power generation system, comprising: determining a plurality of modules based on the structural characteristics, operation principle and environmental factors of the umbrella ladder type land-based high-altitude wind power generation system, including: a main cable module, an air component module, a ground module, a wind field and environment field module; establishing a model of each module; wherein the model of the main cable module comprises a main cable model, the model of the air component module comprises a auxiliary air lifting device sub-model, a wind catching device sub-model and a balancing device sub-model, the model of the ground module comprises an air lifting pile sub-model, a universal pulley seat sub-model, a hoist sub-model and a generator sub-model, and the wind field and environment field module comprises an air density sub-model and a wind speed sub-model; and based on the model of each module, the dynamic simulation of the system's lifting process and recovery process is carried out. Through the present disclosure, the dynamic operation of the umbrella ladder type land-based high-altitude wind power generation system is simulated.

Description

Technical Field

[0001] This disclosure relates to the field of wind power generation technology, and in particular to a dynamic operation simulation method for a ladder-type land-based high-altitude wind power generation system. Background Technology

[0002] With the escalating global energy crisis and climate change, developing sustainable new energy technologies has become crucial for addressing these challenges. Wind energy is an important clean energy source with large reserves and wide distribution, and wind power generation technology has experienced rapid development over the past century. With advancements in technology, high-altitude wind power generation technology has received increasing attention in recent years. High-altitude wind energy generally refers to wind energy resources within a range of 0.5-12 km above the ground. Wind resources within this range are more stable and abundant. It can be said that the practice and development of high-altitude wind power generation technology has opened up new avenues for modern energy production.

[0003] Current high-altitude wind power generation technologies can be divided into two main categories based on the location of the generator: air-based and land-based technologies. The umbrella-ladder high-altitude wind power generation system is a novel power generation technology based on land-based power generation. Existing land-based high-altitude wind power generation technologies mainly rely on rigid and flexible wing umbrellas, with very few cases employing umbrella-ladder structures, and there is a lack of dynamic operation simulations for umbrella-ladder land-based high-altitude wind power generation systems. Summary of the Invention

[0004] In view of this, this disclosure proposes a dynamic operation simulation method, device, electronic equipment, storage medium, and computer program product for a ladder-type land-based high-altitude wind power generation system.

[0005] According to one aspect of this disclosure, a dynamic operation simulation method for a ladder-type land-based high-altitude wind power generation system is provided, the method comprising:

[0006] Based on the structural characteristics, operating principles, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system, multiple modules are identified, including: a main cable module, an aerial component module, a ground module, and a wind farm and environmental field module. The main cable module includes the main cable of the umbrella ladder-type land-based high-altitude wind power generation system; the aerial component module includes other aerial devices of the umbrella ladder-type land-based high-altitude wind power generation system besides the main cable; the ground module includes the ground equipment of the umbrella ladder-type land-based high-altitude wind power generation system; and the wind farm and environmental field module includes the external environment in which the umbrella ladder-type land-based high-altitude wind power generation system operates.

[0007] Models are established for each of the multiple modules; wherein, the model of the main cable module includes a main cable model, the model of the aerial components module includes an auxiliary lift device sub-model, a wind-catching device sub-model, and a balancing device sub-model, the model of the ground module includes a lift pile model, a universal pulley seat model, a winch sub-model, and a generator sub-model, and the wind field and environmental field module includes an air density sub-model and a wind speed sub-model;

[0008] Based on the models of each module, the ascent and recovery processes of the umbrella ladder-type land-based high-altitude wind power generation system are dynamically simulated.

[0009] In one possible implementation, establishing the model of each module among the plurality of modules includes:

[0010] The main cable model is constructed using the lumped mass method. The main cable model includes multiple mass points, wherein any two adjacent mass points are connected by a spring, and the forces acting on any mass point include at least the spring force and the external force.

[0011] Based on the models of each module, the rising and recovery processes of the umbrella-ladder type land-based high-altitude wind power generation system are dynamically simulated, including:

[0012] If the distance between two adjacent mass points exceeds a first threshold, mass points are added to the main cable model to simulate the release of the main cable during the ascent of the umbrella ladder-type land-based high-altitude wind power generation system.

[0013] If the distance between two adjacent mass points is less than a second threshold, the mass points are deleted from the main cable model to simulate the retrieval of the main cable during the retrieval process of the umbrella ladder-type land-based high-altitude wind power generation system.

[0014] In one possible implementation, for any mass point on the main cable model,

[0015] The velocity of the particle at time t+1 is determined by the velocity of the particle at time t, the acceleration at time t, and the acceleration at time t+1.

[0016] The acceleration of the particle at time t+1 is determined by the force acting on the particle at time t+1 and the mass of the particle.

[0017] The position of the particle at time t+1 is determined by the particle's velocity at time t, acceleration at time t, and position at time t.

[0018] In one possible implementation, the dynamic simulation of the ascent and recovery processes of the umbrella-ladder land-based high-altitude wind power generation system based on the models of each module includes:

[0019] The force exerted by the airflow relative to the auxiliary lift device sub-model is taken as the force acting on the auxiliary lift device sub-model.

[0020] The force exerted by the air relative to the wind-catching device sub-model is used as the force acting on the wind-catching device sub-model.

[0021] The force exerted by the airflow relative to the balancing device sub-model is used as the force acting on the balancing device sub-model.

[0022] In one possible implementation, the air resistance experienced by the auxiliary lift device sub-model is determined by the radius of the auxiliary lift device, the drag coefficient of the auxiliary lift device, the air density at the altitude of the auxiliary lift device, and the relative wind speed of the auxiliary lift device; wherein, the auxiliary lift device is a sphere;

[0023] The aerodynamic lift force on the wind-catching device sub-model is determined by the air density at the height of the wind-catching device, the aerodynamic lift coefficient of the wind-catching device, the direction of the aerodynamic lift force, and the relative wind speed of the wind-catching device.

[0024] The aerodynamic drag experienced by the wind-catching device sub-model is determined by the air density at the height of the wind-catching device, the aerodynamic drag coefficient of the wind-catching device, the direction of aerodynamic drag, and the relative wind speed of the wind-catching device.

[0025] The aerodynamic drag experienced by the sub-model of the balancing device is determined by the air density at the altitude of the balancing device, the aerodynamic drag coefficient of the balancing device, the direction of the aerodynamic drag, and the relative wind speed of the balancing device.

[0026] In one possible implementation, the dynamic simulation of the ascent and recovery processes of the umbrella-ladder land-based high-altitude wind power generation system based on the models of each module includes:

[0027] Calculate the loss coefficients for the aerial pile model, the universal pulley seat model, the winch sub-model, and the generator sub-model respectively;

[0028] Based on the loss coefficients corresponding to the lifting pile model, the universal pulley seat model, the winch sub-model, and the generator sub-model, the corresponding energy loss is determined;

[0029] Based on the energy losses corresponding to the lifting pile model, the universal pulley seat model, the winch sub-model, and the generator sub-model, the output power of the umbrella ladder type land-based high-altitude wind power generation system is calculated.

[0030] In one possible implementation, establishing the model of each module among the plurality of modules includes:

[0031] The wind speed sub-model is established by fitting a function to the relationship between wind speed and altitude;

[0032] The air density sub-model is established by fitting a function to the relationship between air density and altitude.

[0033] According to another aspect of this disclosure, a dynamic operation simulation device for an umbrella-ladder type land-based high-altitude wind power generation system is provided, the device comprising:

[0034] Modular modules are used to determine multiple modules based on the structural characteristics, operating principles, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system. These modules include: a main cable module, an aerial component module, a ground module, and a wind farm and environmental field module. The main cable module includes the main cable of the umbrella ladder-type land-based high-altitude wind power generation system. The aerial component module includes other aerial devices of the umbrella ladder-type land-based high-altitude wind power generation system besides the main cable. The ground module includes the ground equipment of the umbrella ladder-type land-based high-altitude wind power generation system. The wind farm and environmental field module includes the environment in which the umbrella ladder-type land-based high-altitude wind power generation system operates.

[0035] The modeling module is used to create models for each of the multiple modules; wherein, the model of the main cable module includes a main cable model, the model of the aerial components module includes sub-models of the auxiliary lift device, wind capture device, and balancing device, the model of the ground module includes a lift pile model, a universal pulley seat model, a winch model, and a generator model, and the wind field and environmental field module includes an air density sub-model and a wind speed sub-model.

[0036] The simulation module is used to dynamically simulate the ascent and recovery processes of the umbrella ladder-type land-based high-altitude wind power generation system based on the models of the various modules.

[0037] According to another aspect of this disclosure, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the above-described method.

[0038] According to another aspect of this disclosure, a non-volatile computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the steps of the above-described method.

[0039] According to another aspect of this disclosure, a computer program product is provided, including a computer program or a non-volatile computer-readable storage medium carrying the computer program, wherein the computer program, when executed by a processor, implements the steps of the above-described method.

[0040] Based on the structural characteristics, operating principles, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system, this disclosure identifies multiple modules, including: a main cable module, an aerial component module, a ground module, and a wind farm and environmental field module. The main cable module comprises the main cable of the umbrella ladder-type land-based high-altitude wind power generation system; the aerial component module comprises other aerial devices of the umbrella ladder-type land-based high-altitude wind power generation system besides the main cable; the ground module comprises the ground equipment of the umbrella ladder-type land-based high-altitude wind power generation system; and the wind farm and environmental field module comprises the umbrella ladder... The external environment of the parachute-type land-based high-altitude wind power generation system is simulated by establishing models for each module. Specifically, the main cable module model includes a main cable model; the aerial component module model includes sub-models of the auxiliary ascent device, wind capture device, and balancing device; the ground module model includes models of the ascent pile, universal pulley seat, winch, and generator; and the wind field and environmental field module includes sub-models of air density and wind speed. Based on these models, the ascent and retrieval processes of the parachute-type land-based high-altitude wind power generation system are dynamically simulated. Thus, by comprehensively considering the structural characteristics, operating principles, and environmental factors of the parachute-type land-based high-altitude wind power generation system, the system is divided into main cable module, aerial component module, ground module, and wind field and environmental field module. Models are established for the characteristics of each module, and then, based on the models of different modules, dynamic simulations of the ascent and retrieval processes of the parachute-type land-based high-altitude wind power generation system are achieved. Meanwhile, by modularizing the operation of the umbrella ladder-type land-based high-altitude wind power generation system, the components and related parameters of each module can be flexibly configured according to design requirements and actual conditions, thereby meeting the simulation requirements of different umbrella ladder-type land-based high-altitude wind power generation systems. This provides effective support for the structural design and operation control strategy design of the umbrella ladder-type land-based high-altitude wind power generation system, and promotes the rapid progress of umbrella ladder-type land-based high-altitude wind power generation technology.

[0041] Other features and aspects of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0042] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this disclosure together with the specification and serve to explain the principles of this disclosure.

[0043] Figure 1 A schematic diagram of a ladder-type land-based high-altitude wind power generation system according to an embodiment of the present disclosure is shown.

[0044] Figure 2 A flowchart is shown showing a dynamic operation simulation method for a ladder-type land-based high-altitude wind power generation system according to an embodiment of the present disclosure;

[0045] Figure 3 A schematic flowchart illustrating a simulation of a main cable module according to an embodiment of the present disclosure is shown.

[0046] Figure 4 A schematic flowchart illustrating a simulation of an airborne component module according to an embodiment of the present disclosure is shown.

[0047] Figure 5 A schematic flowchart illustrating a simulation of a ground module according to an embodiment of the present disclosure is shown.

[0048] Figure 6 A schematic flowchart illustrating a simulation of a wind field and environmental field module according to an embodiment of the present disclosure is shown.

[0049] Figure 7 A schematic diagram is shown of a dynamic operation simulation method for a land-based high-altitude wind power generation system according to an embodiment of the present disclosure;

[0050] Figure 8 A schematic diagram showing the structural composition and operating principle of a ladder-type land-based high-altitude wind power generation system according to an embodiment of the present disclosure is provided.

[0051] Figure 9 A schematic diagram of the calculation process of a dynamic operation simulation method for a ladder-type land-based high-altitude wind power generation system according to an embodiment of the present disclosure is shown.

[0052] Figure 10 A structural diagram of a dynamic operation simulation device for a ladder-type land-based high-altitude wind power generation system according to an embodiment of the present disclosure is shown.

[0053] Figure 11 A block diagram of an electronic device 1900 according to an embodiment of the present disclosure is shown. Detailed Implementation

[0054] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0055] As used herein, the terms “comprising,” “including,” “having,” or variations thereof are open-ended and include one or more of the stated features, integrals, elements, steps, components, or functions, but do not exclude the presence or addition of one or more other features, integrals, elements, steps, components, functions, or groups thereof.

[0056] When an element is referred to as “connected,” “coupled,” “responding,” or a variation thereof relative to another element, it may be directly connected, coupled, or responding to another element, or there may be an intermediate element present.

[0057] Although the terms first, second, third, etc., may be used herein to describe various elements / operations, these elements / operations should not be limited by these terms. These terms are only used to distinguish one element / operation from another. Therefore, without departing from the teachings of the inventive concept, a first element / operation in some embodiments may be referred to as a second element / operation in other embodiments.

[0058] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0059] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0060] The following section provides an exemplary description of possible application scenarios for the dynamic operation simulation method of the umbrella ladder-type land-based high-altitude wind power generation system in this disclosure embodiment.

[0061] Figure 1 A schematic diagram of a tiered, land-based high-altitude wind power generation system according to an embodiment of this disclosure is shown. Figure 1 As shown, the umbrella-ladder type land-based high-altitude wind power generation system may include: aerial equipment, ground equipment, and control equipment (not shown in the figure);

[0062] For example, the aerial equipment may include auxiliary lift devices, balancing devices, wind-catching devices, and main cables; the aerial equipment plays a role in capturing and transmitting wind energy in a ladder-type land-based high-altitude wind power generation system. Specifically, the auxiliary lift device provides lift to the wind-catching device, enabling it to ascend to a set height; the balancing device maintains the stability of the auxiliary lift device, wind-catching device, and main cable in the air; the wind-catching device captures wind energy at high altitudes and converts it into mechanical energy, thereby driving a ground-based generator to produce electricity; there are multiple wind-catching devices arranged in a ladder-like pattern; and the main cable connects the auxiliary lift device, balancing device, wind-catching device, etc., to the ground equipment.

[0063] For example, the ground equipment may include devices such as lifting piles, universal pulley seats, winches, and generators; the ground equipment plays a role in the main cable deployment and energy conversion in the umbrella ladder-type land-based high-altitude wind power generation system. The lifting piles are used to maintain the stability of the main cable and effectively convert wind power at high altitudes into mechanical energy; the universal pulley seats are used to adapt to changes in wind direction at high altitudes, ensuring that the direction of the main cable can be adjusted with changes in wind direction, thereby maximizing wind energy capture; the winch is connected to the air-based equipment via the main cable; the generator, driven by the main cable, generates electrical energy, which can be transmitted and distributed through the power transmission network.

[0064] For example, the control device can be an electronic device with data processing and signal transmission functions for controlling the operation of ground equipment and air equipment.

[0065] It should be noted that, Figure 1 The structure and number of components of the umbrella ladder-type land-based high-altitude wind power generation system shown are merely examples. The system may include more or fewer devices or apparatuses, and there is no limitation on this.

[0066] The actual operation of the umbrella ladder-type land-based high-altitude wind power generation system can be divided into an ascent process (also known as a launch or takeoff process) and a recovery process. During the ascent process, the auxiliary launch device provides initial buoyancy to the wind-catching device and balancing device. The winch rotates forward to release the main cable. After the wind-catching device is activated, it captures wind energy and drives the generator on the ground to generate electricity via the main cable. During the recovery process, the wind-catching device is deactivated, the winch reverses to retrieve the main cable, and the balancing device maintains the stability of the wind-catching device, auxiliary launch device, and main cable, ensuring the safe retrieval of the wind-catching device and auxiliary launch device to the designated height and preparing for the next power cycle. In this way, like "flying and reeling in a kite," the system achieves aerial flight and ground power generation through the up-and-down power cycle of the wind-catching device.

[0067] Compared to other high-altitude wind power technologies, the umbrella ladder-type land-based high-altitude wind power generation system has the potential for high power generation and significant advantages in large-scale operation. However, the operation of this system in actual wind field environments is quite complex. On the one hand, the wind speed and direction in the natural wind profile are constantly changing, which makes the system always in a highly unsteady environment. On the other hand, the system's own working state is quite complex. For example, the opening and closing of the wind-catching device is also accompanied by the main cable being retracted and extended.

[0068] In related technologies, there is a lack of simulation schemes for the dynamic operation of umbrella ladder-type land-based high-altitude wind power generation systems. Therefore, this disclosure provides a dynamic operation simulation method for umbrella ladder-type land-based high-altitude wind power generation systems (detailed description below). Considering the complex structure and operation process of umbrella ladder-type land-based high-altitude wind power generation systems and the numerous influencing factors, this dynamic operation simulation method adopts a modular simulation approach to facilitate the simulation of its dynamic operation process. It comprehensively considers the structural characteristics, operating principles, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system, dividing it into a main cable module, an aerial component module, a ground module, and a wind field and environmental field module. Models are established for the characteristics of each module, and then the models of each module are integrated to dynamically simulate the ascent and retrieval processes of the umbrella ladder-type land-based high-altitude wind power generation system. The dynamic operation simulation method of the umbrella ladder-type land-based high-altitude wind power generation system can dynamically simulate the ascent and recovery processes of the system under complex wind field conditions. This helps to conduct a detailed study on the dynamic operation process and laws of the system under complex wind field conditions. Furthermore, this method can be applied to the optimization configuration of key components in the design process of the system. In addition, it can also provide support for optimizing the operation plan during the operational phase of the system.

[0069] The following provides a detailed description of the dynamic operation simulation method for the umbrella-ladder type land-based high-altitude wind power generation system provided in the embodiments of this disclosure.

[0070] Figure 2 The flowchart illustrates a dynamic operation simulation method for a ladder-type land-based high-altitude wind power generation system according to an embodiment of the present disclosure. Exemplarily, this method can be executed by a processing device with data processing capabilities, such as a computer, processor, server, etc. Figure 2 As shown, the method may include the following steps:

[0071] Step 201: Based on the structural characteristics, operating principle, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system, multiple modules are determined, including: a main cable module, an aerial component module, a ground module, and a wind field and environmental field module. The main cable module includes the main cable of the umbrella ladder-type land-based high-altitude wind power generation system; the aerial component module includes other aerial devices of the umbrella ladder-type land-based high-altitude wind power generation system besides the main cable; the ground module includes the ground equipment of the umbrella ladder-type land-based high-altitude wind power generation system; and the wind field and environmental field module includes the external environment of the umbrella ladder-type land-based high-altitude wind power generation system.

[0072] Based on the above Figure 1 Taking the umbrella-ladder type land-based high-altitude wind power generation system as an example, the system structure can include ground equipment, aerial equipment, and control equipment. Among them, the ground equipment and aerial equipment are key components that capture wind energy to generate electricity. For the ground equipment, devices such as the lifting piles, universal pulley seats, winches, and generators are all deployed on the ground. These devices work together to achieve the deployment and retraction of the main cable and energy conversion. Therefore, each device in the ground equipment is considered as a module, resulting in the ground equipment module. For the aerial equipment, the auxiliary lifting device, wind-catching device, and balancing device have similar structures and principles. However, the main cable, as a key component of the umbrella-ladder type land-based high-altitude wind power generation system, differs significantly in structure and function from the auxiliary lifting device, wind-catching device, and balancing device. Therefore, the main cable is considered as a module, resulting in the main cable module, and the auxiliary lifting device, wind-catching device, and balancing device are considered as a module, resulting in the aerial component module. Meanwhile, considering that the operating scenario of the umbrella ladder-type land-based high-altitude wind power generation system is generally a complex wind field, and that as a wind power generation system, wind often has a significant impact on the system's operating status and power generation efficiency, and that the system's operation is affected by environmental factors such as air density, a wind field and an environmental field module are therefore defined. Thus, based on the structural characteristics, operating principle, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system, four modules are identified: the main cable module, the aerial component module, the ground module, and the wind field and environmental field module. This allows for convenient modeling analysis of each module, simulating the dynamic operation process of the umbrella ladder-type land-based high-altitude wind power generation system.

[0073] For example, the divided modules can be flexibly configured according to design requirements and actual application conditions. For instance, the aerial component module can support the configuration of different types of auxiliary launch devices, wind-catching devices, and balancing devices. The auxiliary launch devices can be spherical or airship-shaped, the wind-catching devices can be circular or wing-shaped power parachutes, and the balancing devices can be installed sideways to the main cable or across the main cable. Similarly, the ground module can also be configured with components of different structural types. In this way, by modularizing the parachute-type land-based high-altitude wind power generation system and supporting flexible configuration of components within each module, the simulation requirements of different parachute-type land-based high-altitude wind power generation systems can be met.

[0074] Step 202: Establish models for each module in the plurality of modules; wherein, the model of the main cable module includes a main cable model, the model of the aerial component module includes an auxiliary lift device sub-model, a wind-catching device sub-model, and a balancing device sub-model, the model of the ground module includes a lift pile model, a universal pulley seat model, a winch sub-model, and a generator sub-model, and the wind field and environmental field module includes an air density sub-model and a wind speed sub-model.

[0075] Step 203: Based on the models of each module, perform dynamic simulation of the ascent and recovery processes of the umbrella ladder-type land-based high-altitude wind power generation system.

[0076] In this step, based on the established main cable model, auxiliary lifting device sub-model, wind-catching device sub-model, balancing device sub-model, lifting pile model, universal pulley seat model, winch sub-model, generator sub-model, air density sub-model, and wind speed sub-model, the ascent and retrieval processes of the umbrella ladder-type land-based high-altitude wind power generation system are dynamically simulated by integrating these models. For example, these models can be integrated based on the connection relationships between the corresponding physical devices.

[0077] As an example, simulations can be used to obtain the height and force changes of each model in the aerial component module, the force changes of the main cable model in the main cable module, and the output power of the ground module, thereby providing theoretical support for engineering design and practice.

[0078] In this embodiment, based on the structural characteristics, operating principle, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system, multiple modules are determined. These modules include: a main cable module, an aerial component module, a ground module, and a wind farm and environmental field module. The main cable module includes the main cable of the umbrella ladder-type land-based high-altitude wind power generation system. The aerial component module includes other devices in the aerial equipment of the umbrella ladder-type land-based high-altitude wind power generation system besides the main cable. The ground module includes the ground equipment of the umbrella ladder-type land-based high-altitude wind power generation system. The wind farm and environmental field module includes the umbrella ladder-type... The external environment of the land-based high-altitude wind power generation system: Models of each module are established. The main cable module model includes the main cable model; the aerial component module model includes sub-models of the auxiliary ascent device, wind-catching device, and balancing device; the ground module model includes models of the ascent pile, universal pulley seat, winch, and generator; and the wind field and environmental field module includes sub-models of air density and wind speed. Based on these models, the ascent and retrieval processes of the umbrella ladder-type land-based high-altitude wind power generation system are dynamically simulated. Thus, considering the structural characteristics, operating principles, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system, the system is divided into main cable module, aerial component module, ground module, and wind field and environmental field module. Models are established for the characteristics of each module, and then, based on the models of different modules, dynamic simulations of the ascent and retrieval processes of the umbrella ladder-type land-based high-altitude wind power generation system are achieved. Meanwhile, by modularizing the operation of the umbrella ladder-type land-based high-altitude wind power generation system, the components and related parameters of each module can be flexibly configured according to design requirements and actual conditions, thereby meeting the simulation requirements of different umbrella ladder-type land-based high-altitude wind power generation systems. This provides effective support for the structural design and operation control strategy design of the umbrella ladder-type land-based high-altitude wind power generation system, and promotes the rapid progress of umbrella ladder-type land-based high-altitude wind power generation technology.

[0079] The following is a summary of the above. Figure 2 The simulation of the main cable module divided into sections is used as an example to illustrate the process.

[0080] Figure 3 This diagram illustrates a simulation flow chart of a main cable module according to an embodiment of the present disclosure, as shown below. Figure 3 As shown, the following steps may be included:

[0081] Step 301: Construct the main cable model using the lumped mass method. The main cable model includes multiple mass points, wherein any two adjacent mass points are connected by a spring, and the force acting on any mass point includes at least the spring force and the external force.

[0082] Step 301 can be used as described above. Figure 2 One possible implementation of step 202.

[0083] The lumped mass method typically describes the interactions and motion states between particles by solving a set of differential equations. Specifically, the lumped mass method replaces the continuous structure with discrete particles, representing the corresponding properties of the original structure by describing the properties of the particle group (i.e., a mechanical system composed of many interacting particles) such as displacement and acceleration. This method can be applied to simplify the dynamic simulation of complex continuous structures.

[0084] Considering that the main cable is generally made of flexible rope, which is prone to large deformation under various external forces, the lumped mass method is used as the simulation method in this step. The main cable is discretized into several mass points, and the mass of the main cable is evenly distributed to each mass point. Adjacent mass points are connected by springs. Each mass point has physical quantities such as mass, position, velocity, and acceleration, thus forming a dynamic system. For example, the mass of each mass point in the main cable model can be determined according to the actual mass of the main cable and the number of discrete mass points.

[0085] Generally, the more discrete points the main cable is divided into, the more accurate the description of the main cable deformation will be, but the higher the computational cost will be. Therefore, factors such as the length of the main cable and computational efficiency can be considered comprehensively, and the discrete division can be performed according to requirements to determine the number of mass points in the main cable model, where the original length between any two adjacent mass points is the same.

[0086] Assuming the main cable is discretized into N mass points, and a main cable model composed of N mass points is constructed, the dynamic equation of the main cable model can be expressed by the following formula (1):

[0087]

[0088] Among them, M i This represents the mass of the i-th mass point in the main cable model; F represents the acceleration vector of the i-th mass in the main cable model; i (x1,x2,...,x N ) represents the force exerted on the i-th mass in the main cable model, including spring force, external force, etc., and N represents the number of mass points.

[0089] For example, the interaction force between any two adjacent mass points in the main cable is generated by the deformation of the spring connecting these two mass points, i.e., the spring force, which is calculated according to Hooke's law, as shown in the following formula (2):

[0090]

[0091] Among them, fi,i+1 Let represent the spring force between the i-th mass and the (i+1)-th mass in the main cable model; k represents the spring constant; r i r represents the position vector of the i-th mass point in the main cable model. i+1 represents the position vector of the (i+1)th mass in the main cable model; l represents the original length of the spring connecting the two mass points.

[0092] For example, the spring constant k can be calculated based on the Young's modulus of the main cable, which is generally provided by the cable manufacturer. Given the cross-sectional area or diameter of the main cable, the spring constant can be calculated using the following formula (3):

[0093]

[0094] Where E represents the Young's modulus of the main cable; A represents the cross-sectional area of ​​the main cable; and l represents the original length of the spring connecting the two mass points.

[0095] Thus, the spring force on any mass point can be calculated using the above formula (2), wherein any mass point in the main cable model other than the two ends should be subject to the spring force provided by the two mass points it is connected to.

[0096] Specifically, for any mass point in the main cable model, the external force acting on that mass point can include wind resistance. For a mass point connected to an aerial component, the external force acting on that mass point can also include: the force applied by the aerial component, for example, a mass point connected to an auxiliary lift device is subjected to the force applied by the auxiliary lift device; a mass point connected to a balancing device is subjected to the force applied by the balancing device; a mass point connected to a wind-catching device is subjected to the force applied by the wind-catching device.

[0097] For example, the wind resistance experienced by any mass point in the main cable model is the sum of half of the wind resistance experienced by the upper and lower cable segments connected to that mass point. The wind resistance experienced by the upper cable segment connected to that mass point can be calculated using the following formula (4):

[0098]

[0099] Where, d i c represents the wind resistance experienced by the upper section of the cable connecting the i-th mass in the main cable model; d ρ represents the aerodynamic drag coefficient of the main cable. h(i) This indicates the average air density corresponding to the upper section of the cable; D represents the diameter of the main cable; v i The average velocity of the wind relative to the upper section of the cable can be represented by the vector difference between the average wind speed corresponding to the upper section of the cable and the average velocity of the upper section of the cable; ||v i|| indicates the magnitude of the average speed of the wind relative to the upper section of the cable.

[0100] Therefore, the resultant force F of the spring force and air resistance (i.e., wind resistance) acting on the i-th mass point in the main cable model is... i It can be expressed by the following formula (5):

[0101] F i =f i-1,i +f i,i+1 +d i-1 +d i …………………………(5)

[0102] Among them, f i-1,i f represents the spring force between the (i-1)th mass and the ith mass in the main cable model. i,i+1 d represents the spring force between the i-th mass and the (i+1)-th mass in the main cable model; i d represents half of the wind resistance experienced by the upper section of the cable connected to the i-th mass point in the main cable model. i-1 This represents half of the wind resistance experienced by the lower cable segment connected to the i-th mass point in the main cable model.

[0103] For example, for a mass point connected to an aerial component in the main cable model, the force acting on the mass point includes not only the spring force and air resistance shown in (5) above, but also the force exerted on the mass point by the aerial component.

[0104] Step 302: Based on the main cable model, perform dynamic simulation of the main cable during the ascent and retrieval processes of the umbrella ladder-type land-based high-altitude wind power generation system.

[0105] Step 302 above can be used as the above Figure 2 One possible implementation of step 203.

[0106] To describe the dynamic behavior of the main cable in a ladder-type land-based high-altitude wind power generation system, it is necessary to accurately solve the dynamic equations of each mass point in the main cable model. For example, the improved Verlet algorithm, namely the Velocity-Verlet algorithm, can be used to solve the dynamic equations of the main cable.

[0107] The Verlet algorithm is a numerical solution to classical mechanics equations. It solves the dynamic equations by iteratively calculating the displacement and velocity of each particle. Its core idea is to estimate the current position using the displacement and acceleration of the current time step and the displacement of the previous step.

[0108] The following formula (6) is used to represent the i-th mass R in the main cable model at time t+Δt. i position r iPerform a Taylor expansion:

[0109]

[0110] Where, r i (t+Δt) represents the position of the i-th mass point in the main cable model at time t+Δt, r i (t) represents the position of the i-th mass point in the main cable model at time t; v i (t) represents the velocity of the i-th particle in the main cable model at time t; a i (t) represents the acceleration of the i-th mass in the main cable model at time t; f (3) (t) represents the third derivative of the force acting on the i-th particle at time t; Δt represents the time step, O(Δt) 4 ) represents Δt 4 The higher-order infinitesimals.

[0111] The i-th mass R in the main cable model at time t-Δt is obtained by using the following formula (7). i position r i Perform a Taylor expansion:

[0112]

[0113] Where, r i (t-Δt) represents the position of the i-th mass in the main cable model at time t-Δt, r i (t) represents the position of the i-th mass point in the main cable model at time t; v i (t) represents the velocity of the i-th particle in the main cable model at time t; a i (t) represents the acceleration of the i-th mass in the main cable model at time t; f (3) (t) represents the third derivative of the force acting on the i-th particle at time t; Δt represents the time step, O(Δt) 4 ) represents Δt 4 (a higher-order infinitesimal).

[0114] Adding formulas (6) and (7) together, the result is shown in formula (8) below:

[0115] r i (t+Δt)=2r i (t)-r i (t-Δt)+a i (t)Δt 2 +Ο(Δt 4 )………………(8)

[0116] Where, r i(t+Δt) represents the position of the i-th mass point in the main cable model at time t+Δt, r i (t-Δt) represents the position of the i-th mass in the main cable model at time t-Δt, r i (t) represents the position of the i-th mass point in the main cable model at time t; a i (t) represents the acceleration of the i-th mass in the main cable model at time t; Δt represents the time step, O(Δt) 4 ) represents Δt 4 (a higher-order infinitesimal).

[0117] Subtracting formulas (6) and (7) from the above results in formula (9) as follows:

[0118]

[0119] Among them, v i (t) represents the velocity of the i-th mass in the main cable model at time t, r i (t+Δt) represents the position of the i-th mass point in the main cable model at time t+Δt, where r i (t-Δt) represents the position of the i-th mass in the main cable model at time t-Δt, where Δt represents the time step. ∟(Δt) 2 ) represents Δt 2 (a higher-order infinitesimal).

[0120] If we omit the higher-order minor quantities in the above formulas (6)-(9), we obtain the iterative format for calculating displacement and velocity using the classic Verlert algorithm. Since calculating the velocity of a particle at its next position requires knowledge of its previous position, a major drawback of this algorithm is that velocity calculation lags behind displacement calculation. The Velocity-Verlet algorithm, however, can update both the particle's position and velocity simultaneously, and explicitly (i.e., can be solved directly at the same time) consider the influence of acceleration on these two quantities. This ensures that the Velocity-Verlet algorithm does not lag behind displacement calculation when calculating velocity, thus improving computational accuracy.

[0121] In one possible implementation, for any particle in the main cable model, the position of that particle at time t+1 is determined by its velocity at time t, its acceleration at time t, and its position at time t. Here, time t+1 can be represented by time t+Δt, where Δt represents the time step, and its specific value can be set according to requirements.

[0122] For example, the position of the mass can be updated using the current acceleration using the Velocity-Verlet algorithm, as shown in the following formula (10):

[0123]

[0124] Where, r i (t+Δt) represents the position of the i-th mass point in the main cable model at time t+Δt, r i (t) represents the position of the i-th mass point in the main cable model at time t; v i (t) represents the velocity of the i-th particle in the main cable model at time t; a i (t) represents the acceleration of the i-th mass in the main cable model at time t; Δt represents the time step.

[0125] In one possible implementation, for any particle in the main cable model, the acceleration of that particle at time t+1 is determined by the force acting on that particle at time t+1 and the mass of that particle. Here, time t+1 can be represented by time t+Δt.

[0126] For example, the Velocity-Verlet algorithm can be used to calculate the acceleration of the mass at the new position based on the force at the new position, as shown in the following formula (11):

[0127]

[0128] Among them, a i (t+Δt) represents the acceleration of the i-th mass in the main cable model at time t+Δt; F i (t+Δt) represents the force exerted on the i-th mass in the main cable model at time t+Δt; M i This represents the mass of the i-th mass point in the main cable model.

[0129] In one possible implementation, for any mass point on the main cable model, the velocity of the mass point at time t+1 is determined by the velocity of the mass point at time t, the acceleration at time t, and the acceleration at time t+1; wherein time t+1 can be represented by time t+Δt.

[0130] For example, the velocity of a particle at a new moment can be calculated using the following equation (12):

[0131]

[0132] Among them, v i (t+Δt) represents the velocity of the i-th particle in the main cable model at time t+Δt; v i (t) represents the velocity of the i-th particle in the main cable model at time t; a i (t) represents the acceleration of the i-th mass in the main cable model at time t; a i(t+Δt) represents the acceleration of the i-th mass in the main cable model at time t+Δt; Δt represents the time step.

[0133] In this way, by calculating all the mass points in the main cable model using the above formulas (10)-(12), the dynamic equation of the entire main cable model can be solved, and the dynamic information (velocity, acceleration, position, etc.) of each mass point in the main cable model can be obtained, thereby describing the motion behavior of the main cable in the operation of the umbrella ladder type land-based high-altitude wind power generation system.

[0134] Furthermore, to simulate the ascent and retrieval processes of a ladder-type land-based high-altitude wind power generation system, it is necessary to describe the length changes caused by the release and retrieval of the main cable. In this embodiment, the main cable deployment and retrieval simulation is performed by determining the relative distance between mass points and adding or deleting mass points under appropriate conditions.

[0135] In one possible implementation, when the distance between two adjacent mass points exceeds a first threshold, mass points are added to the main cable model to simulate the release of the main cable during the ascent of the umbrella ladder-type land-based high-altitude wind power generation system.

[0136] During the ascent of the umbrella ladder-type land-based high-altitude wind power generation system, new mass points need to be added to the main cable model to simulate the effect of the main cable continuously elongating. This requires defining the critical length l′ (i.e., the first threshold) of the newly added mass points, as shown in the following formula (13):

[0137] l′=(1+k′)l………………(13)

[0138] Wherein, k′ represents the scaling parameter, which is used to measure the distance between the newly added mass point and the original mass point in the main cable model. The specific value of k′ can be set as needed. k′ can be a small value close to 0, for example, it can be 0.1 or 0.01; l represents the original length of the spring between two adjacent mass points in the main cable.

[0139] In this way, the position of each mass point in the main cable model can be calculated, and when the distance between two adjacent mass points exceeds the critical length shown in (13) above, a new mass point is added to the main cable model, which is denoted as the (n+1)th mass point.

[0140] For example, when assigning initial motion conditions to the newly added (n+1)th particle, in order to avoid causing unnecessary numerical oscillations, it can be assumed that the motion state of the newly added particle is the same as that of the previous particle, that is, it has the same motion state as the nth particle.

[0141] In one possible implementation, if the distance between two adjacent mass points is less than a second threshold, the mass points are deleted from the main cable model to simulate the retrieval of the main cable during the retrieval process of the umbrella ladder-type land-based high-altitude wind power generation system.

[0142] In the recovery process of the umbrella ladder-type land-based high-altitude wind power generation system, the effect of the main cable continuously shortening is simulated by deleting mass points in the main cable model, as shown in the following formula (14):

[0143] l″<k″l……………………(14)

[0144] Where l″ represents the distance between the (n-1)th mass point and the nth mass point in the main cable model; k″ represents the scaling parameter when deleting mass points, used to measure the length of the last cable segment; and l represents the original length of the spring between two adjacent mass points after the main cable is discretized into mass points.

[0145] In this way, the position of each mass point in the main cable model can be calculated. Using formula (14), if the distance between two adjacent mass points is less than k″l (i.e., the second threshold), the nth mass point in the main cable model is deleted.

[0146] For example, in order to keep the dynamic state of the system continuous, after deleting the nth mass in the main cable, the motion parameters of the (n-1)th mass in the main cable model are set to the motion parameters of the new n′th mass. The purpose of this is to prevent abrupt changes in the position and velocity of other masses. Generally speaking, the smaller the value of k″, the smaller the simulation error.

[0147] In this embodiment, the lumped mass method is used to construct the main cable model, which includes multiple mass points. Any two adjacent mass points are connected by springs, and the forces acting on any mass point include at least the spring force and external forces. Based on the main cable model, dynamic simulations are performed on the main cable during the ascent and retrieval processes of the umbrella ladder-type land-based high-altitude wind power generation system. Thus, using the lumped mass method as the simulation approach, the main cable is discretized into several mass points connected by springs. Considering wind resistance, external forces provided by aerial components, etc., the actual deformation of the main cable is simulated. As an example, by determining the relative distance between two mass points, mass points are added or removed under appropriate conditions to simulate the release and retrieval of the main cable during the ascent and retrieval processes of the umbrella ladder-type land-based high-altitude wind power generation system.

[0148] The following is a summary of the above. Figure 2 The simulation of the air component module divided in the middle is used as an example to illustrate the process.

[0149] Figure 4This diagram illustrates a simulation flow of an airborne component module according to an embodiment of the present disclosure, as shown below. Figure 4 As shown, the following steps may be included:

[0150] Step 401: Establish sub-models for the auxiliary lift device, wind capture device, and balancing device.

[0151] Step 401 can be used as described above. Figure 2 One possible implementation of step 202.

[0152] For example, sub-models of the auxiliary lift device, wind-catching device, and balancing device can be constructed based on the lumped mass method. Taking the construction of the wind-catching device sub-model as an example, the lumped mass method can be used to describe the wind-catching device, resulting in multiple mass points. For any mass point among the multiple mass points, the corresponding mechanical unit is determined, wherein the mechanical unit is used to connect the mass point to at least one other mass point among the multiple mass points. The mechanical unit includes one or more of bending springs, shear springs, and tension springs. Based on the multiple mass points and the mechanical units corresponding to each mass point among the multiple mass points, the wind-catching device sub-model is established.

[0153] For example, the lumped mass method can be used to describe the wind-catching device in its fully open state, thereby using multiple mass points to represent the wind-catching device and realizing the Lagrange particle model of the wind-catching device; for each mass point, the corresponding mechanical unit includes bending spring, shear spring and tension spring, and the mass point is connected to other different mass points through different springs, thereby establishing a mass spring model, which is the sub-model of the wind-catching device.

[0154] Step 402: Based on the auxiliary lift device sub-model, wind capture device sub-model, and balancing device sub-model, perform dynamic simulation of the auxiliary lift device sub-model, wind capture device sub-model, and balancing device sub-model during the ascent and retrieval processes of the umbrella ladder type land-based high-altitude wind power generation system.

[0155] Step 402 above can be used as the above Figure 2 One possible implementation of step 203.

[0156] For example, airflow field models surrounding the auxiliary launch device sub-model, wind-catching device sub-model, and balancing device sub-model can be established based on the Smoothed Particle Hydrodynamics (SPH) method. SPH is a meshless hydrodynamic analysis method, avoiding problems such as mesh distortion that may occur during traditional mesh model calculations. It is also unaffected by the randomness of actual particle distribution, and the free boundaries of the generated model will not exhibit numerical divergence. For instance, taking the wind-catching device sub-model as an example, the target airflow field region can be determined based on the wind-catching device sub-model, ensuring the wind-catching device sub-model is immersed within the target airflow field region. Using SPH, multiple fluid particles within the target airflow field region are determined; and an airflow field model is established based on these multiple fluid particles. The shape, range, and boundary conditions of the target airflow field can be set according to requirements, provided that the wind-catching device sub-model can be immersed in the target airflow field. Furthermore, all fluid particles in the target airflow field can be used as fluid particles in the airflow field model surrounding the wind-catching device sub-model. Each fluid particle carries part of the fluid's mass and has velocity, density, pressure, and viscosity attributes, thereby enabling the establishment of an airflow field model surrounding the wind-catching device sub-model within the target airflow field.

[0157] For example, the components of the airflow field model include multiple fluid particles; the number, density, distribution, etc. of the fluid particles included in the airflow field model can be set according to requirements and are not limited thereto.

[0158] For the sub-model of the auxiliary lift device:

[0159] The auxiliary lift-off device provides initial buoyancy for the operation of the parachute-type land-based high-altitude wind power generation system by filling it with a gas less dense than air, preventing capsizing at low wind speeds. Exemplarily, the auxiliary lift-off device can be a spherical helium balloon, an airship-shaped buoy, or other types of devices, without limitation.

[0160] As an example, when the auxiliary lift device is a sphere, i.e. a spherical capsule filled with a gas less dense than air (such as helium), the forces acting on the sphere during the operation of a parachute-type land-based high-altitude wind power generation system can include gravity, buoyancy, and air resistance.

[0161] In one possible implementation, the buoyancy of the auxiliary lift device sub-model is determined by the radius of the auxiliary lift device, the air density at the altitude of the auxiliary lift device, and the density of the gas filling the auxiliary lift device; wherein the auxiliary lift device is a sphere.

[0162] For example, taking a helium balloon as the auxiliary lifting device, the buoyancy of the helium balloon can be calculated using the following formula (15):

[0163]

[0164] Among them, F b This represents the buoyancy force acting on the helium balloon; r b ρh represents the radius of the helium balloon's contents. ( b ) ρ0 represents the air density at altitude h of the helium balloon; ρ0 represents the helium density; and g is the acceleration due to gravity.

[0165] In one possible implementation, the air resistance experienced by the auxiliary lift device sub-model is determined by the radius of the auxiliary lift device, the drag coefficient of the auxiliary lift device, the air density at the altitude of the auxiliary lift device, and the relative wind speed of the auxiliary lift device; wherein the auxiliary lift device is a sphere.

[0166] For example, taking a helium balloon as the auxiliary lifting device, the air resistance experienced by the helium balloon can be calculated using the following formula (16):

[0167]

[0168] Among them, F d C represents the air resistance experienced by the helium balloon. d ρ represents the drag coefficient of a helium balloon, which is determined by factors such as the balloon material; h(b) W represents the air density at altitude h of the helium balloon. h ′ (b) The velocity vector representing the wind relative to the motion of the helium balloon, also known as relative wind speed; ||W h ′ (b) || indicates the magnitude of the relative wind speed.

[0169] In one possible implementation, the force exerted by the airflow relative to the auxiliary lift device sub-model is used as the force acting on the auxiliary lift device sub-model; thus, considering the wind speed vector and the motion of the auxiliary lift device itself, the force acting on the auxiliary lift device is transformed into a force generated relative to the wind speed, as shown in the following formula (17):

[0170] W h ′ (b) =W h(b) -V b …………………………(17)

[0171] Among them, W h(b) V represents the wind speed vector. b W represents the velocity vector of the helium balloon.h ′ (b) This represents the relative wind speed, which is the vector difference between the two.

[0172] For the wind-catching device sub-model:

[0173] Wind-catching devices are typically made of flexible materials and are activated by the aerodynamic forces generated by the wind, which in turn pull a cable to convert wind energy into mechanical energy. Examples of wind-catching devices include circular power umbrellas and wing-shaped power umbrellas.

[0174] As an example, let's take a circular working umbrella as an example to introduce its force modeling method; the circular working umbrella has an opening at the top, through which the main cable passes horizontally, and small holes are opened around the perimeter to connect to and fix a thin cable to the main cable. Its effective wind-catching area can be approximated as a circle, and the wind-catching section is perpendicular to the cable.

[0175] When the umbrella-type land-based high-altitude wind power generation system is in operation, the main considerations are the gravity, aerodynamic lift, and aerodynamic drag experienced by the circular working umbrella.

[0176] In one possible implementation, the force exerted by the airflow relative to the wind-catching device sub-model is used as the force acting on the wind-catching device sub-model; for example, taking a circular umbrella as the wind-catching device, the relative wind speed W of the circular umbrella... h ′ (p) You can refer to the above formula (17) for calculation.

[0177] To calculate the aerodynamic lift and drag on a circular power parachute, it is also necessary to determine the direction and angle of attack of the aerodynamic lift and drag.

[0178] First, determine the plane containing the aerodynamic lift and aerodynamic drag. The effective wind-catching surface of the circular working umbrella is perpendicular to the cable. The projection of the relative wind speed of the working umbrella onto the effective wind-catching surface can be expressed by the following formula (18):

[0179] W h " (p) =W h ′ (p) -r(r·W h ′ (p) (18)

[0180] Among them, W h " (p) W represents the projection of the relative wind speed of the power parachute onto the effective wind-catching surface, r represents the direction vector of the main cable connecting the power parachute, and W represents the direction vector of the main cable connecting the power parachute. h ′ (p) This indicates relative wind speed.

[0181] The projection and the effective wind speed vector of the circular working umbrella, as shown in (18) above, constitute a plane S, in which the aerodynamic lift and aerodynamic drag direction vectors of the circular working umbrella both lie; wherein, the direction of aerodynamic drag can be expressed by the following formula (19):

[0182]

[0183] Among them, e x W represents the direction vector of aerodynamic drag. h ′ (p) Represents relative wind speed, ||W h ′ (p) || indicates the magnitude of the relative wind speed.

[0184] Aerodynamic lift direction vector e z and the direction vector of aerodynamic drag e x To remain vertical, the following formula (20) must be satisfied:

[0185] e x ·e z =0…………………………(20)

[0186] Therefore, the perpendicular vector of the plane S containing the aerodynamic lift direction vector and the aerodynamic drag direction vector is constructed as shown in the following formula (21):

[0187]

[0188] Among them, e y W represents the perpendicular vector to the plane S containing the aerodynamic lift direction vector and the aerodynamic drag direction vector. h ′ (p) W represents relative wind speed. h " (p) This represents the projection of the relative wind speed onto the effective wind-catching surface of a circular working umbrella.

[0189] The direction of aerodynamic lift can then be expressed in the form of the following formula (22):

[0190] e z =e x ×e y …………………………(twenty two)

[0191] Among them, e x e represents the direction vector of aerodynamic drag. z e represents the aerodynamic lift direction vector. y It represents the perpendicular vector to the plane S containing the aerodynamic lift direction vector and the aerodynamic drag direction vector.

[0192] The angle of attack is the angle between the relative wind speed and the effective wind-catching surface of a circular working umbrella, which can be calculated using the following formula (23):

[0193]

[0194] Where α represents the angle of attack, r represents the direction vector of the main cable connecting the circular power parachute, and W h ′ (p) Represents relative wind speed, ||W h ′ (p) || represents the magnitude of the relative wind speed, and ||r|| represents the magnitude of the direction vector.

[0195] In one possible implementation, the aerodynamic lift force on the wind-catching device sub-model is determined by the air density at the altitude of the wind-catching device, the aerodynamic lift coefficient of the wind-catching device, the direction of the aerodynamic lift force, and the relative wind speed of the wind-catching device.

[0196] For example, the aerodynamic lift force on the working parachute can be expressed by the following formula (24):

[0197]

[0198] Among them, F L ρ represents the aerodynamic lift force on a circular working umbrella. h(p) C represents the air density at the altitude of a circular working umbrella. L (α) represents the aerodynamic lift coefficient of a circular power parachute, α represents the angle of attack, and e z ||W represents the direction vector of aerodynamic lift. h ′ (p) || represents the relative wind speed, and A represents the cross-sectional area of ​​the circular umbrella.

[0199] In one possible implementation, the aerodynamic drag on the wind-catching device sub-model is determined by the air density at the height of the wind-catching device, the aerodynamic drag coefficient of the wind-catching device, the direction of the aerodynamic drag, and the relative wind speed of the wind-catching device.

[0200] For example, the aerodynamic drag experienced by the working umbrella can be expressed by the following formula (25):

[0201]

[0202] Among them, F D ρ represents the aerodynamic lift force on a circular working umbrella. h(p) C represents the air density at the altitude of a circular working umbrella. D (α) represents the aerodynamic drag coefficient of a circular power parachute, α represents the angle of attack, and e x ||W represents the direction vector of aerodynamic drag.h ′ (p) || represents the relative wind speed, and A represents the cross-sectional area of ​​the circular umbrella.

[0203] The aerodynamic coefficient of a wind-catching device is generally determined by the angle of attack. For example, a rigid circular working umbrella can be calculated using a high-precision constant-flow computational fluid dynamics (CFD) numerical simulation method, and the aerodynamic coefficient values ​​for different angles of attack are shown in Table 1.

[0204] Table 1. Reference values ​​for aerodynamic coefficients of a rigid circular working umbrella with a radius of 40m.

[0205]

[0206] In practical applications, considering the difference in air permeability between rigid materials and flexible fabrics, the values ​​in Table (1) above should be reduced accordingly. For ease of calculation, the aerodynamic coefficient and angle of attack are fitted with a function. To improve the accuracy of the simulation, for example, the lift and drag coefficients of a circular power umbrella can be experimentally determined, and the experimental data can be interpolated to obtain a more accurate fitting function.

[0207] For the sub-model of the balancing device:

[0208] The balancing device is an aerial component with a structure similar to the wind-catching device. In the operation of the umbrella ladder-type land-based high-altitude wind power generation system, the main function of the balancing device is to maintain system stability and assist in system recovery. The modeling of the balancing device mainly involves its installation method. The first method is the same as the installation method of the wind-catching device. In this case, the balancing device is considered to be a small wind-catching device, and its force modeling method is the same as that of the wind-catching device. In one possible implementation, the force of the air flow relative to the balancing device sub-model is used as the force on the balancing device sub-model. Its calculation can refer to the above formula (17). The second method is to hang the balancing device on the main cable by a cable. During operation, it is assumed that its axis is on the same straight line as the relative wind speed. In this case, the angle of attack of the balancing device is always 90° and it is only subject to aerodynamic drag. The calculation of aerodynamic drag can refer to the above formula (25).

[0209] In one possible implementation, the aerodynamic drag on the balancing device sub-model is determined by the air density at the altitude of the balancing device, the aerodynamic drag coefficient of the balancing device, the direction of the aerodynamic drag, and the relative wind speed of the balancing device. For example, the aerodynamic drag can be calculated using the above formula (25).

[0210] In one possible implementation, a flexible umbrella dynamic fluid-structure interaction simulation method can be used to simulate the dynamic opening and closing process of the wind-catching device sub-model. This method can be implemented using existing techniques. For example, a lumped mass method is used to model the flexible working umbrella, and smoothed particle fluid dynamics is used to simulate the incoming flow. The force curve of the flexible working umbrella over time is calculated and normalized using the force at stable opening, thereby simulating the dynamic opening and closing process of the wind-catching device.

[0211] In this embodiment, sub-models of the auxiliary lift device, wind-catching device, and balancing device are established. Based on these sub-models, dynamic simulations are performed on the lift and recovery processes of the umbrella-ladder type land-based high-altitude wind power generation system. Thus, a simulation module considering flight attitude and dynamic opening and closing of the aerial components performs modeling analysis on the auxiliary lift device, wind-catching device, and balancing device. As an example, considering wind speed and the motion of the aerial components themselves, the forces acting on the aerial components are converted into the forces exerted by the airflow relative to the aerial components; exemplaryly, these forces include drag along the direction of the incoming flow and lateral forces perpendicular to the direction of the incoming flow. As another example, CFD numerical simulation is used to simulate the aerodynamic lift and drag coefficients as a function of angle of attack. If measured data is available, measured interpolation can also be considered to further improve accuracy.

[0212] The following is a summary of the above. Figure 2 The simulation of the ground module divided in the middle is used as an example to illustrate the process.

[0213] The ground equipment of a ladder-type land-based high-altitude wind power generation system mainly consists of lifting piles, universal pulley seats, winches, and generators, and is crucial for energy transmission and conversion. During system operation, energy loss occurs due to mechanical transmission and rope friction. This disclosure proposes a multi-level transient loss superposition method to model the ground equipment. Here, transient refers to the brief process of the system changing from one stable state to another. During this process, the generator typically experiences changes in speed, resulting in energy loss. Moreover, this loss is generated by the superposition of various levels of devices within the ground equipment.

[0214] Figure 5 This diagram illustrates a simulation flow chart of a ground module according to an embodiment of the present disclosure, as shown below. Figure 5 As shown, the following steps may be included:

[0215] Step 501: Establish the model of the lifting pile, the model of the universal pulley seat, the model of the winch, and the model of the generator.

[0216] Step 501 can be used as described above. Figure 2 One possible implementation of step 202.

[0217] For example, the type, size, structure and other parameters of the aerial pile, universal pulley seat, winch and generator can be determined according to actual needs, so as to establish the aerial pile model, universal pulley seat model, winch sub-model and generator sub-model accordingly.

[0218] Step 502: Based on the lifting pile model, the universal pulley seat model, the winch sub-model, and the generator sub-model, perform dynamic simulation of energy transfer and loss during the ascent and recovery processes of the umbrella ladder type land-based high-altitude wind power generation system.

[0219] Step 502 above can be used as the above Figure 2 One possible implementation of step 203.

[0220] In one possible implementation, the loss coefficients corresponding to the lifting pile model, the universal pulley seat model, the winch sub-model, and the generator sub-model are calculated respectively; based on the loss coefficients corresponding to the lifting pile model, the universal pulley seat model, the winch model, and the generator sub-model, the corresponding energy loss is determined; based on the energy loss corresponding to the lifting pile model, the universal pulley seat model, the winch model, and the generator sub-model, the output power of the umbrella ladder-type land-based high-altitude wind power generation system is calculated.

[0221] For example, the energy loss coefficient of each device at different rope speeds of the main cable can be measured by experimental methods, thereby establishing a loss coefficient matrix under different operating conditions, calculating the cable tension that drives the generator to generate electricity, and finally calculating the output power of the umbrella ladder type land-based high-altitude wind power generation system.

[0222] For example, the generator speed-output power curve can be obtained by fitting.

[0223] In this embodiment, models of the lifting pile, the universal pulley base, the winch, and the generator are established. Based on these models, dynamic simulations are performed to analyze the energy transfer and loss during the ascent and recovery processes of the umbrella-ladder type land-based high-altitude wind power generation system. As an example, the energy transfer and loss effects in ground equipment such as the lifting pile, universal pulley base, winch, and generator are simulated using a multi-level transient loss superposition method. Exemplarily, a loss coefficient matrix can be established based on the structural characteristics of each level of ground equipment, and the generator's speed-power curve can ultimately be provided.

[0224] The following is a summary of the above. Figure 2 The simulation of the wind field and environmental field modules divided in the diagram is illustrated by example.

[0225] Figure 6 This diagram illustrates a simulation flow of a wind field and environmental field module according to an embodiment of the present disclosure, as shown below. Figure 6 As shown, the following steps may be included:

[0226] Step 601: Establish wind speed sub-model and air density sub-model.

[0227] Step 601 can be used as described above. Figure 2 One possible implementation of step 202.

[0228] In one possible implementation, the wind speed sub-model is established by fitting a function to the relationship between wind speed and altitude;

[0229] In reality, wind speed changes with altitude, forming a wind speed gradient. In practical applications, power functions, logarithmic functions, or exponential functions can be used to establish a wind profile (i.e., a curve showing wind speed changing with altitude) fitting function for wind speed W and altitude h. Furthermore, interpolation based on field measurements can improve the fit of the theoretical function, thereby calculating the corresponding wind speed W based on the altitude of each component in the system. (h) As shown in equation (26):

[0230] W (h) =W(h)……………………(26)

[0231] Among them, W (h) Let h represent the wind speed at height h, and W(h) represent the fitted wind profile function.

[0232] In one possible implementation, the air density sub-model is established by fitting a function to the correspondence between air density and altitude.

[0233] In reality, air density typically changes with altitude. Air density is a key parameter for calculating aerodynamic forces. To improve the accuracy of simulations, an air density ρ is established based on the international standard atmospheric model. h The fitting function is the same as the height h. Furthermore, it can be interpolated based on actual measurements to improve the fit of the theoretical function, thereby calculating the corresponding air density according to the height of each component of the system, as shown in equation (27):

[0234] ρ (h) =ρ(h)……………………(27)

[0235] Where, ρ(h) Let ρ(h) represent the air density at height h, and let ρ(h) represent the air density sub-model function.

[0236] Step 602: Simulate the external environment of the umbrella ladder-type land-based high-altitude wind power generation system during its ascent and retrieval processes using the wind speed sub-model and the air density sub-model.

[0237] Step 602 can be used as described above. Figure 2 One possible implementation of step 203.

[0238] In this embodiment, a wind speed sub-model and an air density sub-model are established. These sub-models are used to simulate the external environment of the parachute-type land-based high-altitude wind power generation system during its ascent and descent. This is because the height of each device in the aerial components continuously changes during the operation of the parachute-type land-based high-altitude wind power generation system; therefore, wind speed and air density sub-models are established to account for the characteristics of air density (also known as atmospheric density) and wind speed varying with altitude. As an example, interpolation can be considered when measured data is available to further improve the fit of the theoretical functions of air density and wind speed varying with altitude.

[0239] Figure 7 This diagram illustrates a dynamic operation simulation method for a ladder-type land-based high-altitude wind power generation system according to an embodiment of the present disclosure. Figure 7 As shown, the wind field and environmental field module serves as the input for the environmental conditions of the system operation, while the main cable module, aerial component module, and ground module simulate the system structure. Specifically, in the wind field and environmental field module, a wind field fitting function is implemented based on wind profiles, theoretical functions, field measurements, and data interpolation. Furthermore, an atmospheric density fitting function is implemented based on the international standard atmospheric model and function fitting (corresponding to the above). Figure 6 In the aerial component module, the gravity, buoyancy, and aerodynamic drag acting on the auxiliary lift device are simulated. The dynamic opening and closing of the wind-catching device is simulated through CFD numerical simulation, aerodynamic lift, and aerodynamic drag simulation. The balancing device is also simulated based on its installation method (corresponding to the above). Figure 4 In the main cable module, the lumped mass method is used to simulate the main cable through cable discretization, spring force, air resistance, and the Velocity-Verlet algorithm; cable release and retrieval are simulated by increasing or decreasing the number of mass points (corresponding to the above). Figure 3 In the ground module, multi-level transient losses are superimposed through the energy loss, loss coefficient matrix, and output power of the ground device (corresponding to the above). Figure 5 ).

[0240] Figure 8 The diagram illustrates the structural composition and operating principle of a ladder-type land-based high-altitude wind power generation system according to an embodiment of the present disclosure. Figure 8 As shown, the system's ascent and retrieval processes are simulated using divided modules: wind field and environmental field, main cable, aerial components, and ground modules. Specifically, in the wind field and environmental field module, fitting functions for wind speed and altitude, and air density and altitude are established based on measured values ​​(corresponding to the above...). Figure 6 In the aerial component module, for auxiliary lift devices, the forces acting on different types of devices, such as spherical and airship-shaped devices, are analyzed; for balancing devices, the forces acting on the balancing devices are analyzed based on the installation method, such as frontal and lateral installation; for wind-catching devices, the forces acting on different types of devices and the dynamic opening and closing process are simulated, such as circular and airfoil-shaped devices performing work (corresponding to the above). Figure 4 In the main cable module, the lumped mass method is used to simulate the deformation of the flexible cable and the length change during release and retrieval (corresponding to the above). Figure 3 In the ground module, based on the characteristics of ground structures such as generators, a multi-level transient loss superposition method is used to simulate energy transfer losses (corresponding to the above). Figure 5 ).

[0241] Figure 9 This diagram illustrates the calculation flow of a dynamic operation simulation method for a ladder-type land-based high-altitude wind power generation system according to an embodiment of the present disclosure. Figure 9 As shown, firstly, the relationships between wind speed and atmospheric density and altitude are fitted using functions, serving as environmental input parameters for calculation. Then, using the lumped mass method, the main cable is discretized to determine the resultant force on each mass point in the main cable model, simulating the release and retrieval of the main cable. Next, the forces acting on the aerial devices are modeled, adding the forces acting on the aerial devices to the main cable model. Finally, the dynamic equations of the main cable model are solved to describe the system's motion behavior, calculating the changes in the main cable force and the system's output power. Figure 9 The specific implementation process of each step can be referred to the above. Figure 2 The relevant statements in the text will not be repeated here.

[0242] Based on the same inventive concept in the above method embodiments, the present disclosure also provides a dynamic operation simulation device for an umbrella ladder-type land-based high-altitude wind power generation system, which can be used to execute the technical solutions described in the above method embodiments.

[0243] Figure 10 This diagram shows a structural diagram of a dynamic operation simulation device for a ladder-type land-based high-altitude wind power generation system according to an embodiment of the present disclosure. Figure 10As shown, the device includes: a modular module 1001, used to determine multiple modules based on the structural characteristics, operating principle, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system. These multiple modules include: a main cable module, an aerial component module, a ground module, and a wind farm and environmental field module. The main cable module includes the main cable of the umbrella ladder-type land-based high-altitude wind power generation system; the aerial component module includes other aerial devices of the umbrella ladder-type land-based high-altitude wind power generation system besides the main cable; the ground module includes the ground equipment of the umbrella ladder-type land-based high-altitude wind power generation system; and the wind farm and environmental field module includes the wind farm and environmental field module of the umbrella ladder-type land-based high-altitude wind power generation system. The environment in which the wind power generation system operates: Modeling module 1002, used to establish models of each module among the multiple modules; wherein, the model of the main cable module includes a main cable model, the model of the aerial component module includes auxiliary lift device sub-models, wind capture device sub-models, and balancing device sub-models, the model of the ground module includes lift pile model, universal pulley seat model, winch sub-model, and generator sub-model, and the wind field and environmental field module includes air density sub-model and wind speed sub-model; Simulation module 1003, used to dynamically simulate the ascent and retrieval processes of the umbrella ladder type land-based high-altitude wind power generation system based on the models of each module.

[0244] In this embodiment, based on the structural characteristics, operating principle, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system, multiple modules are determined. These modules include: a main cable module, an aerial component module, a ground module, and a wind farm and environmental field module. The main cable module includes the main cable of the umbrella ladder-type land-based high-altitude wind power generation system. The aerial component module includes other devices in the aerial equipment of the umbrella ladder-type land-based high-altitude wind power generation system besides the main cable. The ground module includes the ground equipment of the umbrella ladder-type land-based high-altitude wind power generation system. The wind farm and environmental field module includes the umbrella ladder-type... The external environment of the land-based high-altitude wind power generation system: Models of each module are established. The main cable module model includes the main cable model; the aerial component module model includes sub-models of the auxiliary ascent device, wind-catching device, and balancing device; the ground module model includes models of the ascent pile, universal pulley seat, winch, and generator; and the wind field and environmental field module includes sub-models of air density and wind speed. Based on these models, the ascent and retrieval processes of the umbrella ladder-type land-based high-altitude wind power generation system are dynamically simulated. Thus, considering the structural characteristics, operating principles, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system, the system is divided into main cable module, aerial component module, ground module, and wind field and environmental field module. Models are established for the characteristics of each module, and then, based on the models of different modules, dynamic simulations of the ascent and retrieval processes of the umbrella ladder-type land-based high-altitude wind power generation system are achieved. Meanwhile, by modularizing the operation of the umbrella ladder-type land-based high-altitude wind power generation system, the components and related parameters of each module can be flexibly configured according to design requirements and actual conditions, thereby meeting the simulation requirements of different umbrella ladder-type land-based high-altitude wind power generation systems. This provides effective support for the structural design and operation control strategy design of the umbrella ladder-type land-based high-altitude wind power generation system, and promotes the rapid progress of umbrella ladder-type land-based high-altitude wind power generation technology.

[0245] In one possible implementation, the modeling module 1002 is further configured to: construct the main cable model using the lumped mass method, the main cable model comprising multiple mass points, wherein any two adjacent mass points are connected by a spring, and the force acting on any mass point includes at least: spring force and external force; the simulation module 1003 is further configured to: add mass points to the main cable model when the distance between two adjacent mass points exceeds a first threshold, to simulate the release of the main cable during the ascent of the umbrella ladder-type land-based high-altitude wind power generation system; and delete mass points from the main cable model when the distance between two adjacent mass points is less than a second threshold, to simulate the retrieval of the main cable during the retrieval of the umbrella ladder-type land-based high-altitude wind power generation system.

[0246] In one possible implementation, for any mass on the main cable model, the velocity of the mass at time t+1 is determined by the velocity of the mass at time t, the acceleration at time t, and the acceleration at time t+1; the acceleration of the mass at time t+1 is determined by the force acting on the mass at time t+1 and the mass of the mass; and the position of the mass at time t+1 is determined by the velocity of the mass at time t, the acceleration at time t, and the position at time t.

[0247] In one possible implementation, the simulation module 1003 is further configured to: use the force of air flowing relative to the auxiliary lift device sub-model as the force acting on the auxiliary lift device sub-model; use the force of air flowing relative to the wind-catching device sub-model as the force acting on the wind-catching device sub-model; and use the force of air flowing relative to the balancing device sub-model as the force acting on the balancing device sub-model.

[0248] In one possible implementation, the air resistance experienced by the auxiliary lift device sub-model is determined by the radius of the auxiliary lift device, the drag coefficient of the auxiliary lift device, the air density at the altitude of the auxiliary lift device, and the relative wind speed of the auxiliary lift device; wherein the auxiliary lift device is a sphere; the aerodynamic lift experienced by the wind-catching device sub-model is determined by the air density at the altitude of the wind-catching device, the aerodynamic lift coefficient of the wind-catching device, the direction of the aerodynamic lift, and the relative wind speed of the wind-catching device; the aerodynamic drag experienced by the wind-catching device sub-model is determined by the air density at the altitude of the wind-catching device, the aerodynamic drag coefficient of the wind-catching device, the direction of the aerodynamic drag, and the relative wind speed of the wind-catching device; the aerodynamic drag experienced by the balancing device sub-model is determined by the air density at the altitude of the balancing device, the aerodynamic drag coefficient of the balancing device, the direction of the aerodynamic drag, and the relative wind speed of the balancing device.

[0249] In one possible implementation, the simulation module 1003 is further configured to: calculate the loss coefficients corresponding to the lifting pile model, the universal pulley seat model, the winch sub-model, and the generator sub-model, respectively; determine the corresponding energy loss based on the loss coefficients corresponding to the lifting pile model, the universal pulley seat model, the winch model, and the generator sub-model; and calculate the output power of the umbrella ladder-type land-based high-altitude wind power generation system based on the energy loss corresponding to the lifting pile model, the universal pulley seat model, the winch model, and the generator model.

[0250] In one possible implementation, the modeling module 1002 is further configured to: establish the wind speed sub-model by performing function fitting on the correspondence between wind speed and altitude; and establish the air density sub-model by performing function fitting on the correspondence between air density and altitude.

[0251] In some embodiments, the functions or modules of the apparatus provided in this disclosure can be used to perform the methods described in the above method embodiments. The specific implementation can be referred to the description of the above method embodiments, and for the sake of brevity, it will not be repeated here.

[0252] This disclosure also provides an electronic device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the above method.

[0253] This disclosure also provides a non-volatile computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the above-described method.

[0254] This disclosure also provides a computer program product, including a computer program or a non-volatile computer-readable storage medium carrying the computer program, wherein the computer program, when executed by a processor, implements the steps of the above method.

[0255] Figure 11 A block diagram of an electronic device 1900 according to an embodiment of the present disclosure is shown. For example, the electronic device 1900 may be provided as a server or a terminal device. (Refer to...) Figure 11 The electronic device 1900 includes a processing component 1922, which further includes one or more processors, and memory resources represented by memory 1932 for storing instructions, such as application programs, that can be executed by the processing component 1922. The application programs stored in memory 1932 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 1922 is configured to execute instructions to perform the methods described above.

[0256] Electronic device 1900 may also include a power supply component 1926 configured to perform power management of electronic device 1900, a wired or wireless network interface 1950 configured to connect electronic device 1900 to a network, and an input / output interface 1958 (I / O interface). Electronic device 1900 can operate on an operating system, such as Windows Server, stored in memory 1932. TM Mac OS X TM Unix TM Linux TM FreeBSD TM Or similar.

[0257] In an exemplary embodiment, a non-volatile computer-readable storage medium is also provided, such as a memory 1932 including computer program instructions that can be executed by a processing component 1922 of an electronic device 1900 to perform the above-described method.

[0258] Computer-readable storage media can be tangible devices capable of holding and storing programs / instructions used by instruction execution devices. Computer-readable storage media can be, for example—but not limited to—electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination of the foregoing. The computer-readable storage media used herein are not to be construed as transient signals themselves, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or electrical signals transmitted through wires.

[0259] The computer program (or computer-readable program instructions) described herein can be downloaded from a computer-readable storage medium to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage medium in the respective computing / processing device.

[0260] The computer program (or computer program instructions) used to perform the operations of this disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuits, such as programmable logic circuits, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), are personalized by utilizing state information of computer-readable program instructions. These electronic circuits can execute computer-readable program instructions to implement various aspects of this disclosure.

[0261] Various aspects of this disclosure are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-readable program instructions.

[0262] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that, when executed by the processor of the computer or other programmable data processing apparatus, they create means for implementing the functions / actions specified in one or more blocks of the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium that causes a computer, programmable data processing apparatus, and / or other device to operate in a particular manner; thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing aspects of the functions / actions specified in one or more blocks of the flowchart and / or block diagram.

[0263] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to perform the functions / actions specified in one or more boxes of a flowchart and / or block diagram.

[0264] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0265] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A dynamic operation simulation method for a ladder-type land-based high-altitude wind power generation system, characterized in that, The method includes: Based on the structural characteristics, operating principles, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system, multiple modules are identified, including: a main cable module, an aerial component module, a ground module, and a wind farm and environmental field module. The main cable module includes the main cable of the umbrella ladder-type land-based high-altitude wind power generation system; the aerial component module includes other aerial devices of the umbrella ladder-type land-based high-altitude wind power generation system besides the main cable; the ground module includes the ground equipment of the umbrella ladder-type land-based high-altitude wind power generation system; and the wind farm and environmental field module includes the external environment in which the umbrella ladder-type land-based high-altitude wind power generation system operates. Models are established for each of the multiple modules; wherein, the model of the main cable module includes a main cable model, the model of the aerial components module includes an auxiliary lift device sub-model, a wind-catching device sub-model, and a balancing device sub-model, the model of the ground module includes a lift pile model, a universal pulley seat model, a winch sub-model, and a generator sub-model, and the wind field and environmental field module includes an air density sub-model and a wind speed sub-model; Based on the models of each module, the ascent and recovery processes of the umbrella ladder-type land-based high-altitude wind power generation system are dynamically simulated.

2. The method according to claim 1, characterized in that, The process of establishing models for each of the multiple modules includes: The main cable model is constructed using the lumped mass method. The main cable model includes multiple mass points, wherein any two adjacent mass points are connected by a spring, and the forces acting on any mass point include at least the spring force and the external force. Based on the models of each module, the rising and recovery processes of the umbrella-ladder type land-based high-altitude wind power generation system are dynamically simulated, including: If the distance between two adjacent mass points exceeds a first threshold, mass points are added to the main cable model to simulate the release of the main cable during the ascent of the umbrella ladder-type land-based high-altitude wind power generation system. If the distance between two adjacent mass points is less than a second threshold, the mass points are deleted from the main cable model to simulate the retrieval of the main cable during the retrieval process of the umbrella ladder-type land-based high-altitude wind power generation system.

3. The method according to claim 2, characterized in that, For any mass point on the main cable model, The velocity of the particle at time t+1 is determined by the velocity of the particle at time t, the acceleration at time t, and the acceleration at time t+1. The acceleration of the particle at time t+1 is determined by the force acting on the particle at time t+1 and the mass of the particle. The position of the particle at time t+1 is determined by the particle's velocity at time t, acceleration at time t, and position at time t.

4. The method according to claim 1, characterized in that, Based on the models of each module, the rising and recovery processes of the umbrella-ladder type land-based high-altitude wind power generation system are dynamically simulated, including: The force exerted by the airflow relative to the auxiliary lift device sub-model is taken as the force acting on the auxiliary lift device sub-model. The force exerted by the air relative to the wind-catching device sub-model is used as the force acting on the wind-catching device sub-model. The force exerted by the airflow relative to the balancing device sub-model is used as the force acting on the balancing device sub-model.

5. The method according to claim 4, characterized in that, The air resistance experienced by the auxiliary lift device sub-model is determined by the radius of the auxiliary lift device, the drag coefficient of the auxiliary lift device, the air density at the altitude of the auxiliary lift device, and the relative wind speed of the auxiliary lift device; wherein, the auxiliary lift device is a sphere; The aerodynamic lift force on the wind-catching device sub-model is determined by the air density at the height of the wind-catching device, the aerodynamic lift coefficient of the wind-catching device, the direction of the aerodynamic lift force, and the relative wind speed of the wind-catching device. The aerodynamic drag experienced by the wind-catching device sub-model is determined by the air density at the height of the wind-catching device, the aerodynamic drag coefficient of the wind-catching device, the direction of aerodynamic drag, and the relative wind speed of the wind-catching device. The aerodynamic drag experienced by the sub-model of the balancing device is determined by the air density at the altitude of the balancing device, the aerodynamic drag coefficient of the balancing device, the direction of the aerodynamic drag, and the relative wind speed of the balancing device.

6. The method according to claim 1, characterized in that, Based on the models of each module, the rising and recovery processes of the umbrella-ladder type land-based high-altitude wind power generation system are dynamically simulated, including: Calculate the loss coefficients for the aerial pile model, the universal pulley seat model, the winch sub-model, and the generator sub-model respectively; Based on the loss coefficients corresponding to the lifting pile model, the universal pulley seat model, the winch sub-model, and the generator sub-model, the corresponding energy loss is determined; Based on the energy losses corresponding to the lifting pile model, the universal pulley seat model, the winch sub-model, and the generator sub-model, the output power of the umbrella ladder type land-based high-altitude wind power generation system is calculated.

7. The method according to claim 1, characterized in that, The process of establishing models for each of the multiple modules includes: The wind speed sub-model is established by fitting a function to the relationship between wind speed and altitude; The air density sub-model is established by fitting a function to the relationship between air density and altitude.

8. A dynamic operation simulation device for an umbrella-ladder type land-based high-altitude wind power generation system, characterized in that, The device includes: Modular modules are used to determine multiple modules based on the structural characteristics, operating principles, and environmental factors of the umbrella ladder-type land-based high-altitude wind power generation system. These modules include: a main cable module, an aerial component module, a ground module, and a wind farm and environmental field module. The main cable module includes the main cable of the umbrella ladder-type land-based high-altitude wind power generation system. The aerial component module includes other aerial devices of the umbrella ladder-type land-based high-altitude wind power generation system besides the main cable. The ground module includes the ground equipment of the umbrella ladder-type land-based high-altitude wind power generation system. The wind farm and environmental field module includes the environment in which the umbrella ladder-type land-based high-altitude wind power generation system operates. The modeling module is used to create models for each of the multiple modules; wherein, the model of the main cable module includes a main cable model, the model of the aerial components module includes sub-models of the auxiliary lift device, wind capture device, and balancing device, the model of the ground module includes a lift pile model, a universal pulley seat model, a winch model, and a generator model, and the wind field and environmental field module includes an air density sub-model and a wind speed sub-model. The simulation module is used to dynamically simulate the ascent and recovery processes of the umbrella ladder-type land-based high-altitude wind power generation system based on the models of the modules.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 7.

10. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

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