Power generation control system of high-altitude operation hydraulic platform

Abstract

The invention relates to a power generation control system of a high-altitude operation hydraulic platform, which comprises a hydraulic power unit, the hydraulic power unit comprises a hydraulic pump and a hydraulic platform fixedly mounted at the enabling end of the hydraulic pump, and a wind power generation energy storage unit is fixedly arranged on the outer side of the hydraulic platform; the wind power generation energy storage unit at least comprises a vertical axis wind power generator array, and a rectification voltage stabilization module and a super capacitor energy storage group which are electrically connected with the vertical axis wind power generator array; the vertical-axis wind driven generator array is annularly distributed in the circumferential direction of the hydraulic platform, high-altitude wind energy is captured through wind wheel blades and converted into three-phase alternating current, and an intelligent change-over switch is arranged between the rectifying and voltage-stabilizing module and the super-capacitor energy storage set. And the charging and discharging module is used for automatically switching the charging and discharging modes of the super capacitor according to the real-time monitored charge state of the super capacitor, the output power of the wind driven generator and the power demand of the aerial work platform.

Description

Technical Field

[0001] The present application relates to the technical field of aerial work, and in particular to a power generation control system of an aerial work hydraulic platform. Background Art

[0002] Engineering machinery vehicles, especially aerial work machinery several meters high, need to transmit energy over long distances. However, when the distance is long, the energy loss of the hydraulic system of the aerial work platform is high, resulting in huge energy waste.

[0003] During the long-distance transmission of hydraulic oil in the aerial work platform, the loss along the pipeline is ΔP = k × ρ × L × v2 / 2 / d, where k is the flow coefficient, ρ is the liquid density, L is the pipeline length, v is the flow velocity, and d is the pipe diameter. When the hydraulic oil model is selected and the pipe diameter is determined, the loss along the pipeline is related to the pipeline length and flow velocity. The flow velocity v = q / A, where q is the flow rate and A is the cross-sectional area of ​​the pipeline. After the pipeline is selected, A is determined. The flow velocity is related to the flow rate. The flow rate q = V × r, where V is the displacement of the pump and r is the speed. When the displacement and speed of the pump are fixed, the flow rate can be considered unchanged. At this time, the loss along the pipeline is only positively correlated with the length of the pipeline L, that is, the longer the pipeline, the greater the loss along the pipeline (without considering the change in flow coefficient caused by oil temperature changes). However, in the actual pipeline layout, the length of the pipeline is restricted by the structure, especially in the application of engineering machinery several meters high. The pipeline from the chassis to the platform is long and cannot be shortened, which leads to increased loss along the pipeline, increased wasted power, and reduced overall machine efficiency.

[0004] Therefore, we propose here a power generation control system for an aerial work hydraulic platform. Summary of the invention

[0005] The main purpose of this application is to provide a power generation control system for an aerial work hydraulic platform, aiming to solve the problem of energy waste caused by pipeline losses along the way during long-distance energy transmission of the aerial work platform in the prior art, as well as the problem of reduced overall machine efficiency caused by this.

[0006] To achieve the above-mentioned purpose, the present application provides a power generation control system for an aerial work hydraulic platform, comprising: a hydraulic power unit, the hydraulic power unit is used to convert mechanical energy into hydraulic energy, and provide a stable pressure oil source for the entire system, the hydraulic power unit comprises: a hydraulic pump, and a hydraulic platform fixedly mounted on the enabling end of the hydraulic pump, and a wind power generation energy storage unit is fixedly arranged on the outer side of the hydraulic platform;

[0007] The wind power generation and energy storage unit at least includes: a vertical axis wind turbine array, and a rectifier and voltage stabilization module and a supercapacitor energy storage group electrically connected to the vertical axis wind turbine array; the vertical axis wind turbine array is distributed in a ring shape along the circumference of the hydraulic platform, captures high-altitude wind energy through wind rotor blades and converts it into three-phase alternating current, and an intelligent switching switch is configured between the rectifier and voltage stabilization module and the supercapacitor energy storage group, which is used to automatically switch the charging and discharging mode of the supercapacitor according to the real-time monitored supercapacitor charge state, wind turbine output power and power demand of the aerial work platform.

[0008] Preferably, the intelligent switching switch comprises the following steps:

[0009] S1, monitor the charge state of the supercapacitor, the output power of the wind turbine and the power demand of the aerial work platform in real time through the built-in sensors;

[0010] S2. Analyze the current working status according to the data obtained in step S2; when the state of charge of the supercapacitor is lower than the preset threshold and the output power of the wind turbine generator is higher than the current load demand, enter the next working process; and when the state of charge of the supercapacitor is lower than the preset threshold and the output power of the wind turbine generator is lower than the current load demand, disconnect the power supply link of the wind turbine generator and switch to the external power grid for power supply;

[0011] S3, the intelligent switching switch immediately closes the charging circuit, and stores the excess electric energy generated by the wind turbine into the supercapacitor bank through the rectifier and voltage regulator module, and controls the charging efficiency to always be maximized and not exceed the rated charge and discharge rate of the supercapacitor through the preset current regulation logic;

[0012] S4. When the sensor detects that the charge state of the supercapacitor is greater than or equal to the preset threshold, and / or the current load demand suddenly increases, the intelligent switching switch re-evaluates the current working state; if the output power of the wind turbine is greater than or equal to the load demand after the sudden increase, the wind turbine continues to power the platform, disconnects the charging circuit, and stops charging the supercapacitor; if the output power of the wind turbine is less than the load demand after the sudden increase, it switches to the wind-storage combined power supply mode.

[0013] More preferably, the current regulation logic preset in step S3 is specifically:

[0014] S3-1, based on the rated charge and discharge rate of the supercapacitor group and the current state of charge of the supercapacitor, the formula (1) 初 =k 1 ×C 额定×(1-SOC), calculate the initial charging current value; where I initial represents the initial charging current; k1 is the proportionality coefficient, and its value range can be adjusted between 0.5 and 1.5 according to the specific supercapacitor characteristics; C rated is the rated capacity of the supercapacitor group; SOC represents the current state of charge of the supercapacitor, and its value range is from 0 (fully discharged) to 1 (fully charged);

[0015] S3-2, establish a correlation mechanism between charging current and wind turbine output power. 充 =k 2 ×P 风机 ×(1-SOC)+I 基础 , determine the real-time charging current; wherein, to determine the real-time charging current; wherein, Icharge is the actual charging current; k2 is the proportional coefficient related to the output power of the wind turbine generator, and its value can be adjusted between 0.1 and 0.5 according to the power characteristics of the wind turbine generator; Pfan represents the current output power of the wind turbine generator; Ibase is a basic charging current value, which is used to ensure that when the output power of the wind turbine generator is low, the supercapacitor can still be charged with a relatively stable current;

[0016] S3-3, introduce the load demand change factor to dynamically adjust the charging current, and according to formula (3) I 动态 =I 充 -k 3 ×ΔP 负载 , and obtain the final dynamic charging current; where Idynamic is the final charging current after considering the load demand change; k3 is the proportional coefficient of the load demand change factor, which can range from 0.1 to 0.3; APload represents the difference between the current load demand and the load demand at the previous moment.

[0017] Preferably, in step S3, the charging circuit is also provided with upper and lower limit protection values ​​of the charging current.

[0018] Preferably, the wind-storage combined power supply mode is specifically as follows: when the load demand suddenly increases and the output power of the wind turbine is insufficient to meet all electricity demand, the wind turbine will give priority to transmitting the electric energy it can currently generate to the electrical equipment and circuits directly related to the load demand; at the same time, the supercapacitor group releases the stored electric energy through the discharge circuit according to the preset discharge rate and discharge current, and synergistically supplements the power supply of the wind turbine.

[0019] Preferably, the wind-storage combined power supply mode further includes: adjusting the duty cycle through a rectifier and voltage stabilization module to suppress the DC bus voltage fluctuation within the range of ±2%.

[0020] Preferably, the hydraulic pump is a bidirectional variable displacement pump.

[0021] Preferably, a rotating joint is provided at the center of the hydraulic platform for connecting the hydraulic pipelines and cables between the aerial work platform and the ground, so as to ensure that the transmission of hydraulic oil and electricity will not be disturbed during the rotation of the aerial work platform.

[0022] Preferably, the wind power generation energy storage unit also includes an intelligent control module, which is electrically connected to the rectifier and voltage stabilization module, the supercapacitor energy storage group and the control system of the aerial work platform, and is used to monitor the power generation power of the wind turbine, the charge state of the supercapacitor and the power demand of the aerial work platform in real time, and automatically adjust the operating parameters of the wind turbine and the charging and discharging strategy of the supercapacitor based on this information.

[0023] The beneficial effects of the technical solution of the present invention are:

[0024] Through the circular layout design of the vertical axis wind turbine array, the high wind speed environment of the aerial work platform is fully utilized to achieve a 30%-45% increase in wind energy capture efficiency. Combined with the fast charging and discharging characteristics of the supercapacitor energy storage group, the system energy self-sufficiency rate can reach more than 65%, significantly reducing dependence on external power supplies. At the same time, through the use of adaptive PWM control technology in the rectifier and voltage regulator module, the AC-DC conversion efficiency is stabilized at more than 92%, effectively solving the power quality problem caused by high-altitude wind energy fluctuations.

[0025] On the other hand, the wind turbine with coaxial structure is integrated with the outer cover of the hydraulic platform, which increases the functional modules while keeping the overall size of the platform unchanged. At the same time, the annular vertical axis fan array forms an air diversion effect, which improves the platform's ability to resist crosswinds by 15%-20%. And through the setting of intelligent switching switches, when a sudden load change (such as the lifting action of the hydraulic platform) is detected, the "wind-storage-grid" multi-source coordinated power supply is realized to ensure that the power supply voltage fluctuation of key hydraulic actuators does not exceed ±2%.

[0026] Through the synergistic effect of the upper and lower limit protection values ​​of the charging current, the charging circuit can always control the charging current within a safe and stable range when facing various operating conditions, further optimizing the performance of the entire power supply system, improving energy utilization efficiency, ensuring the continuity and stability of the power supply of the aerial work platform, and providing a solid guarantee for the safe and reliable operation of the platform.

[0027] When the external load changes suddenly or the output power of the wind turbine fluctuates due to natural conditions, the supercapacitor group can act like a "buffer" to quickly absorb or release energy, effectively smoothing the fluctuation of the DC bus voltage, ensuring that the power supply quality always meets the strict requirements of the aerial work platform equipment, and ensuring the safe and stable operation of various types of equipment. And because the supercapacitor group shares part of the load, it reduces the pressure of high-load operation in a short period of time and reduces the risk of damage due to overload. At the same time, the supercapacitor group uses a reasonably designed discharge strategy to enable it to perform charge and discharge cycles within a safe working range, which helps to maintain its good performance and long service life, thereby reducing the cost and time loss caused by equipment maintenance or replacement, and improving the overall economic benefits and operational reliability of the entire power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a system block diagram of a hydraulic power unit in one embodiment of the present application;

[0029] Figure 2 This is a system block diagram of a wind power generation energy storage unit in one embodiment of the present application;

[0030] Figure 3 A schematic diagram of the switching steps of the intelligent switching switch in one embodiment of the present application;

[0031] Figure 4 This is a schematic diagram of the judgment process of the intelligent switching switch in one embodiment of the present application;

[0032] Figure 5 Schematic diagram of the flow of current regulation logic in one embodiment of the present application.

[0033] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] In addition, if the description of "first", "second", etc. is involved in this application, it is only used for descriptive purposes (such as for distinguishing the same or similar elements), and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0036] See also Figure 1-Figure 2 The present invention proposes a power generation control system for an aerial work hydraulic platform, comprising: a hydraulic power unit, the hydraulic power unit is used to convert mechanical energy into hydraulic energy, and provide a stable pressure oil source for the entire system, the hydraulic power unit comprises: a hydraulic pump, and a hydraulic platform fixedly installed at the enabling end of the hydraulic pump, and a wind power generation energy storage unit is fixedly arranged on the outer side of the hydraulic platform;

[0037] The wind power generation and energy storage unit at least includes: a vertical axis wind turbine array, and a rectifier and voltage stabilization module and a supercapacitor energy storage group electrically connected to the vertical axis wind turbine array; the vertical axis wind turbine array is distributed in a ring shape along the circumference of the hydraulic platform, captures high-altitude wind energy through wind rotor blades and converts it into three-phase alternating current, and an intelligent switching switch is configured between the rectifier and voltage stabilization module and the supercapacitor energy storage group, which is used to automatically switch the charging and discharging mode of the supercapacitor according to the real-time monitored supercapacitor charge state, wind turbine output power and power demand of the aerial work platform.

[0038] Specifically, when the supercapacitor's state of charge is lower than a preset threshold and the wind turbine's output power is higher than the load demand, the intelligent switching switch closes to store excess electrical energy in the supercapacitor. When the supercapacitor's state of charge is close to full charge or the wind turbine's output power cannot meet the load demand, the intelligent switching switch is disconnected, the supercapacitor stops charging or starts releasing electrical energy to maintain system voltage stability and ensure continuous power supply to the aerial work platform.

[0039] In this embodiment, the annular layout design of the vertical axis wind turbine array makes full use of the high wind speed environment of the aerial work platform to achieve a 30%-45% increase in wind energy capture efficiency. Combined with the fast charging and discharging characteristics of the supercapacitor energy storage group, the system energy self-sufficiency rate can reach more than 65%, significantly reducing dependence on external power supplies. At the same time, through the rectifier and voltage regulator module, the adaptive PWM control technology is adopted to stabilize the AC-DC conversion efficiency at more than 92%, effectively solving the power quality problem caused by high-altitude wind energy fluctuations.

[0040] On the other hand, the wind turbine with coaxial structure is integrated with the outer cover of the hydraulic platform, which increases the functional modules while keeping the overall size of the platform unchanged. At the same time, the annular vertical axis fan array forms an air diversion effect, which improves the platform's ability to resist crosswinds by 15%-20%. And through the setting of intelligent switching switches, when a sudden load change (such as the lifting action of the hydraulic platform) is detected, the "wind-storage-grid" multi-source coordinated power supply is realized to ensure that the power supply voltage fluctuation of key hydraulic actuators does not exceed ±2%.

[0041] See also Figure 3-Figure 4 In one embodiment, the intelligent switching switch includes the following steps:

[0042] S1, monitor the charge state of the supercapacitor, the output power of the wind turbine and the power demand of the aerial work platform in real time through the built-in sensors;

[0043] S2. Analyze the current working state according to the data obtained in step S2; specifically, when the state of charge of the supercapacitor is lower than the preset threshold value and the output power of the wind turbine generator is higher than the current load demand, enter the next working process; and when the state of charge of the supercapacitor is lower than the preset threshold value and the output power of the wind turbine generator is lower than the current load demand, disconnect the power supply link of the wind turbine generator and switch to the external power grid for power supply;

[0044] S3, the intelligent switching switch immediately closes the charging circuit, and stores the excess electric energy generated by the wind turbine into the supercapacitor bank through the rectifier and voltage regulator module, and controls the charging efficiency to always be maximized and not exceed the rated charge and discharge rate of the supercapacitor through the preset current regulation logic;

[0045] S4. When the sensor detects that the charge state of the supercapacitor is greater than or equal to the preset threshold, and / or the current load demand suddenly increases, the intelligent switching switch re-evaluates the current working state; specifically, if the output power of the wind turbine is greater than or equal to the load demand after the sudden increase, the wind turbine continues to power the platform, disconnects the charging circuit, and stops charging the supercapacitor; if the output power of the wind turbine is less than the load demand after the sudden increase, it switches to the wind-storage combined power supply mode.

[0046] In this embodiment, the precise control of intelligent switching is used to achieve efficient use of the electric energy output by the wind turbine. When the supercapacitor charge state is low and the wind turbine output power is surplus, the excess electric energy is stored in the supercapacitor group in time to avoid the waste of electric energy. When the load demand suddenly increases, the power supply mode can be flexibly adjusted according to the comparison between the wind turbine output power and the load demand, giving priority to the use of the wind turbine's electric energy, reducing the dependence on the external power grid, and increasing the proportion of renewable energy in the entire power supply system, thereby improving the overall energy utilization efficiency.

[0047] At the same time, by real-time monitoring of the supercapacitor charge state, wind turbine output power, and load demand, the system can quickly respond to various changes in working conditions. When the supercapacitor is undercharged and the wind turbine cannot meet the load demand, it quickly switches to the external power grid to ensure uninterrupted power supply for the platform; and when the wind turbine output power meets the load demand, the charging circuit and power supply mode are reasonably adjusted to ensure the stability of the power supply and avoid safety risks to high-altitude operations due to power supply fluctuations. And through the preset current regulation logic during the charging process, the charging efficiency is strictly controlled to always maximize it and not exceed the rated charge and discharge rate of the supercapacitor, effectively preventing the supercapacitor from being damaged due to overcharging or over-discharging, extending the service life of the supercapacitor, and reducing equipment maintenance costs.

[0048] See also Figure 5 In one embodiment, the current regulation logic preset in step S3 is specifically:

[0049] S3-1, based on the rated charge and discharge rate of the supercapacitor group and the current state of charge of the supercapacitor, the formula (1) 初 =k 1 ×C 额定 ×(1-SOC), calculate the initial charging current value; where I initial represents the initial charging current; k1 is the proportionality coefficient, and its value range can be adjusted between 0.5 and 1.5 according to the specific supercapacitor characteristics; C rated is the rated capacity of the supercapacitor group; SOC represents the current state of charge of the supercapacitor, and its value range is from 00 (fully discharged) to 11 (fully charged);

[0050] Specifically, when the supercapacitor state of charge is low, that is, the SOC value is small, the value of (1-SOC) is large, and the initial charging current I initial will also increase accordingly to achieve fast charging, but the increase is limited by the product of k1 and C rated to avoid exceeding the rated charge and discharge rate. When the supercapacitor is close to a fully charged state, the value of (1-SOC) approaches 00, and the initial charging current I initial will gradually decrease, ensuring that the supercapacitor can smoothly reach the final charging state when it is close to being fully charged.

[0051] S3-2, establish a correlation mechanism between charging current and wind turbine output power. 充 =k 2 ×P 风机 ×(1-SOC)+I 基础, determine the real-time charging current; where, to determine the real-time charging current. Where, Icharge is the actual charging current; k2 is the proportional coefficient related to the output power of the wind turbine, and its value can be adjusted between 0.1 and 0.5 according to the power characteristics of the wind turbine; Pfan represents the current output power of the wind turbine; Ibase is a basic charging current value, which is used to ensure that when the output power of the wind turbine is low, the supercapacitor can still be charged with a relatively stable current.

[0052] Specifically, when the output power of the wind turbine is strong, the value of Pfan is large, and after multiplying by (1-SOC) and k2, the contribution to the charging current is also large. Under the premise of not exceeding the rated charge and discharge rate of the supercapacitor, the charging current is moderately increased to make full use of the excess electric energy. Conversely, when the output power of the wind turbine is weakened, the value of the corresponding item decreases, and the charging current will also decrease accordingly, ensuring the stability and safety of the charging process.

[0053] S3-3, introduce the load demand change factor to dynamically adjust the charging current, and according to formula (3) I 动态 =I 充 -k 3 ×ΔP 负载 , the final dynamic charging current is obtained; where I dynamic is the final charging current after considering the load demand change; k3 is the proportional coefficient of the load demand change factor, which can range from 0.1 to 0.3; ΔP load represents the difference between the current load demand and the load demand at the previous moment;

[0054] Specifically, when the current load demand is monitored to have an upward trend, ΔP load is positive, and the value of k3×ΔP load is also positive. After subtracting this value from I charge, the charging current I dynamic will be reduced accordingly, giving priority to the platform's power demand. When the load demand is stable or decreasing, ΔP load is zero or negative, and I dynamic will be close to or higher than I charge. Then, according to the state of charge of the supercapacitor and the output power of the wind turbine, the charging current is reasonably adjusted.

[0055] In this embodiment, the three-level current regulation logic of SOC self-adaptation, wind energy dynamic matching, and load demand priority is used to achieve high efficiency, safety, and intelligence in the charging process. While improving the utilization rate of wind energy, the system extends the service life of the supercapacitor and ensures the power supply stability of the aerial work platform under complex working conditions.

[0056] In one embodiment, the charging circuit in step S3 is further provided with upper and lower limit protection values ​​of the charging current.

[0057] In this embodiment, by setting the upper limit protection value of the charging current, when the charging current may exceed the rated charge and discharge rate of the supercapacitor group due to abnormal increase in wind turbine output power, unexpected change in supercapacitor charge state or other unforeseen factors, the charging circuit can automatically limit the charging current to within the upper limit protection value. This not only effectively prevents safety problems such as heating, bulging and even damage of supercapacitors caused by overcurrent charging, but also avoids potential damage to other components of the entire power supply system, ensuring the stability and reliability of the system under various complex working conditions.

[0058] Setting the lower limit protection value of the charging current plays a key role when the charging current may drop to a too low level due to the continuous low output power of the wind turbine, the sudden increase in load demand or other special circumstances. At this time, maintaining the charging current above the lower limit protection value ensures that the supercapacitor can be charged at a relatively stable and reasonable minimum current, avoiding the interruption of the charging process due to too low current or entering an unstable charging state. At the same time, a stable charging current helps to extend the service life of the supercapacitor and reduce the damage to the internal chemical substances and structure of the supercapacitor caused by long-term low current or irregular charging, thereby reducing the maintenance cost and replacement frequency of the equipment.

[0059] In summary, through the synergistic effect of the upper and lower limit protection values ​​of the charging current, the charging circuit can always control the charging current within a safe and stable range when facing various operating conditions, further optimizing the performance of the entire power supply system, improving energy utilization efficiency, ensuring the continuity and stability of the power supply of the aerial work platform, and providing a solid guarantee for the safe and reliable operation of the platform.

[0060] In one embodiment, the wind-storage combined power supply mode is specifically:

[0061] When the load demand suddenly increases and the output power of the wind turbine is insufficient to meet all electricity demand, the wind turbine will give priority to transmitting the electric energy it can currently generate to the electrical equipment and circuits directly related to the load demand; at the same time, the supercapacitor group releases the stored electric energy through the discharge circuit according to the preset discharge rate and discharge current, and synergistically supplements the power supply of the wind turbine.

[0062] In this embodiment, while the wind turbine is fully powered within its own capacity, the supercapacitor group quickly intervenes as an auxiliary power source. The coordinated work of the two avoids power outages or unstable equipment operation caused by insufficient power supply from a single power source. By accurately discharging according to preset parameters, the supercapacitor group can provide just the right amount of additional power at critical moments, meeting the urgent needs of the load without causing overpowering and energy waste.

[0063] Specifically, when the external load changes suddenly or the output power of the wind turbine fluctuates due to natural conditions, the supercapacitor group can act like a "buffer" to quickly absorb or release energy, effectively smoothing the fluctuations in the DC bus voltage, ensuring that the power supply quality always meets the strict requirements of aerial work platform equipment, and ensuring the safe and stable operation of various types of equipment. In addition, since the supercapacitor group shares part of the load, it reduces the pressure of high-load operation in a short period of time and reduces the risk of damage due to overload. At the same time, the supercapacitor group uses a reasonably designed discharge strategy to enable it to perform charge and discharge cycles within a safe working range, which helps maintain its good performance and long service life, thereby reducing the cost and time loss caused by equipment maintenance or replacement, and improving the overall economic benefits and operational reliability of the entire power supply system.

[0064] In one embodiment, the wind-storage combined power supply mode further includes: adjusting the duty cycle through a rectifier and voltage stabilization module to suppress the DC bus voltage fluctuation within a range of ±2%.

[0065] In this embodiment, the DC bus voltage fluctuation is finely controlled by accurately adjusting the duty cycle through the rectifier and voltage regulator module, which can significantly improve the stability and reliability of the entire power supply system. The voltage fluctuation is strictly controlled within a very small range of ±2%, ensuring the provision of high-quality stable power for various sensitive electronic equipment on the aerial work platform, effectively preventing equipment misoperation, data loss or damage caused by unstable voltage, and ensuring the normal operation and service life of the equipment.

[0066] In one embodiment, the hydraulic pump is a bidirectional variable pump, which can achieve forward or reverse flow of hydraulic oil by changing the swash plate angle or piston stroke, thereby adjusting the lifting speed and direction of the hydraulic platform as needed.

[0067] In one embodiment, a rotating joint is provided at the center of the hydraulic platform for connecting the hydraulic pipelines and cables between the aerial work platform and the ground, thereby ensuring that the transmission of hydraulic oil and electricity is not disturbed during the rotation of the aerial work platform.

[0068] In one embodiment, the wind power generation energy storage unit also includes an intelligent control module, which is electrically connected to the rectifier and voltage stabilization module, the supercapacitor energy storage group and the control system of the aerial work platform, and is used to monitor the power generation power of the wind turbine, the charge state of the supercapacitor and the power demand of the aerial work platform in real time, and automatically adjust the operating parameters of the wind turbine and the charging and discharging strategy of the supercapacitor based on this information to achieve optimal utilization of energy and efficient use of the system.

[0069] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, device, article or power generation control system for an aerial work hydraulic platform including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, device, article or power generation control system for an aerial work hydraulic platform. In the absence of more restrictions, an element defined by the sentence "includes one..." does not exclude the existence of other identical elements in the process, device, article or power generation control system for an aerial work hydraulic platform including the element.

[0070] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A power generation control system for an aerial work hydraulic platform, characterized in that: include: A hydraulic power unit, which is used to convert mechanical energy into hydraulic energy and provide a stable pressure oil source for the entire system. The hydraulic power unit includes: a hydraulic pump, and a hydraulic platform fixedly installed at the enabling end of the hydraulic pump, and a wind power generation energy storage unit is fixedly installed on the outer side of the hydraulic platform; The wind power generation and energy storage unit at least includes: a vertical axis wind turbine array, and a rectifier and voltage stabilization module and a supercapacitor energy storage group electrically connected to the vertical axis wind turbine array; the vertical axis wind turbine array is distributed in a ring shape along the circumference of the hydraulic platform, captures high-altitude wind energy through wind rotor blades and converts it into three-phase alternating current, and an intelligent switching switch is configured between the rectifier and voltage stabilization module and the supercapacitor energy storage group, which is used to automatically switch the charging and discharging mode of the supercapacitor according to the real-time monitored supercapacitor charge state, wind turbine output power and power demand of the aerial work platform.

2. The power generation control system of the aerial work hydraulic platform according to claim 1, characterized in that: The intelligent switching switch comprises the following steps: S1, monitor the charge state of the supercapacitor, the output power of the wind turbine and the power demand of the aerial work platform in real time through the built-in sensors; S2. Analyze the current working status according to the data obtained in step S2; when the state of charge of the supercapacitor is lower than the preset threshold and the output power of the wind turbine generator is higher than the current load demand, enter the next working process; and when the state of charge of the supercapacitor is lower than the preset threshold and the output power of the wind turbine generator is lower than the current load demand, disconnect the power supply link of the wind turbine generator and switch to the external power grid for power supply; S3, the intelligent switching switch immediately closes the charging circuit, and stores the excess electric energy generated by the wind turbine into the supercapacitor bank through the rectifier and voltage regulator module, and controls the charging efficiency to always be maximized and not exceed the rated charge and discharge rate of the supercapacitor through the preset current regulation logic; S4. When the sensor detects that the charge state of the supercapacitor is greater than or equal to the preset threshold, and / or the current load demand suddenly increases, the intelligent switching switch re-evaluates the current working state; if the output power of the wind turbine is greater than or equal to the load demand after the sudden increase, the wind turbine continues to power the platform, disconnects the charging circuit, and stops charging the supercapacitor; if the output power of the wind turbine is less than the load demand after the sudden increase, it switches to the wind-storage combined power supply mode.

3. The power generation control system of the aerial work hydraulic platform according to claim 2, characterized in that: The current regulation logic preset in step S3 is specifically: S3-1, based on the rated charge and discharge rate of the supercapacitor group and the current state of charge of the supercapacitor, the formula (1) 初 =k1×C 额定 ×(1-SOC), calculate the initial charging current value; where I initial represents the initial charging current; k1 is the proportionality coefficient, and its value range can be adjusted between 0.5 and 1.5 according to the specific supercapacitor characteristics; C rated is the rated capacity of the supercapacitor group; SOC represents the current state of charge of the supercapacitor, and its value range is from 0 (fully discharged) to 1 (fully charged); S3-2, establish a correlation mechanism between charging current and wind turbine output power. 充 =k2×P 风机 ×(1-SOC)+I 基础 , determine the real-time charging current; wherein, to determine the real-time charging current; wherein, Icharge is the actual charging current; k2 is the proportional coefficient related to the output power of the wind turbine generator, and its value can be adjusted between 0.1 and 0.5 according to the power characteristics of the wind turbine generator; Pfan represents the current output power of the wind turbine generator; Ibase is a basic charging current value, which is used to ensure that when the output power of the wind turbine generator is low, the supercapacitor can still be charged with a relatively stable current; S3-3, introduce the load demand change factor to dynamically adjust the charging current, and according to formula (3) I 动态 =I 充 -k3×ΔP 负载 , and obtain the final dynamic charging current; where Idynamic is the final charging current after considering the load demand change; k3 is the proportional coefficient of the load demand change factor, which can range from 0.1 to 0.3; APload represents the difference between the current load demand and the load demand at the previous moment.

4. The power generation control system of the aerial work hydraulic platform according to claim 1, characterized in that: In step S3, the charging circuit is also provided with upper and lower limit protection values ​​of the charging current.

5. The power generation control system of the aerial work hydraulic platform according to claim 1, characterized in that: The wind-storage combined power supply mode is specifically as follows: when the load demand suddenly increases and the output power of the wind turbine is insufficient to meet all electricity demand, the wind turbine will give priority to transmitting the electric energy it can currently generate to the electrical equipment and circuits directly related to the load demand; at the same time, the supercapacitor group releases the stored electric energy through the discharge circuit according to the preset discharge rate and discharge current, and synergistically supplements the power supply of the wind turbine.

6. The power generation control system of the aerial work hydraulic platform according to claim 5, characterized in that: The wind-storage combined power supply mode also includes: adjusting the duty cycle through a rectifier and voltage stabilization module to suppress the DC bus voltage fluctuation within the range of ±2%.

7. The power generation control system of the aerial work hydraulic platform according to claim 1, characterized in that: The hydraulic pump is a bidirectional variable displacement pump.

8. The power generation control system of the aerial work hydraulic platform according to claim 7, characterized in that: A rotating joint is provided at the center of the hydraulic platform for connecting the hydraulic pipelines and cables between the aerial work platform and the ground, so as to ensure that the transmission of hydraulic oil and electricity will not be disturbed during the rotation of the aerial work platform.

9. The power generation control system of the aerial work hydraulic platform according to claim 1, characterized in that: The wind power generation energy storage unit also includes an intelligent control module, which is electrically connected to the rectifier and voltage stabilization module, the supercapacitor energy storage group and the control system of the aerial work platform, and is used to monitor the power generation power of the wind turbine, the charge state of the supercapacitor and the power demand of the aerial work platform in real time, and automatically adjust the operating parameters of the wind turbine and the charging and discharging strategy of the supercapacitor based on this information.

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