Method, device and system for determining parameters of yaw collecting ring of wind driven generator

Abstract

The invention provides a parameter determination method, device and system for a yaw collecting ring of a wind driven generator, and belongs to the technical field of wind power generation electric energy transmission. The method comprises the steps that first torque generated when a cabin rotates is obtained; acquiring a second torque generated between the rotor and the stator when the rotor rotates along with the cabin; and according to the first torque and the second torque, torque transmission parameters of the yaw collecting ring of the wind driven generator are determined. The safety and reliability of the equipment can be improved, and the yaw failure rate is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation and electric energy transmission, and in particular to a method, device and system for determining parameters of a yaw collector ring of a wind turbine. Background Art

[0002] At present, wind power generation, as an important part of global clean energy, has put forward higher requirements for power transmission technology under the trend of scale and high power. Especially in wind turbines, realizing the efficient transmission of high-power electric energy between the rotating part and the stationary part has become a key link to ensure the stable operation of the system. The electric energy rotation transmission system is usually used to transmit the electric energy output by the generator in the wind turbine cabin to the tower base or converter equipment. Its core technology involves rotating contact technology, mechanical stability and environmental adaptability.

[0003] In the prior art, the yaw collector ring of a wind turbine is divided into two parts: the stator and the rotor. During the transmission process, the conductive slip ring and the brush mechanism form an electrical connection through continuous sliding contact, transferring the electrical energy collected on the rotating side to the stationary side. However, under high power and high load conditions, this dynamic contact method is easily affected by mechanical vibration, installation deviation, and changes in ambient temperature and humidity, resulting in unstable contact surfaces and increased contact resistance, making it impossible to effectively transmit the torque generated by the rotation of the nacelle, which may cause damage to the collector ring and reduce transmission efficiency. Summary of the invention

[0004] The present application provides a method, device and system for determining parameters of a yaw collector ring of a wind turbine generator, which can improve the safety and reliability of the equipment and reduce the yaw failure rate.

[0005] To solve the above technical problems, the technical solution of this application is as follows: A method for determining parameters of a yaw collector ring of a wind turbine generator, wherein the yaw collector ring of the wind turbine generator comprises a stator and a rotor, wherein the stator is fixed at the top of a tower, and the rotor rotates with the nacelle, and the method comprises: acquiring a first torque generated when the nacelle rotates; Acquire a second torque generated between the rotor and the stator when the rotor rotates with the cabin; A torque transmission parameter of the yaw collector ring of the wind turbine generator is determined according to the first torque and the second torque.

[0006] Optionally, obtaining a first torque generated when the nacelle rotates includes: The wind load torque generated by the wind load on the nacelle when the nacelle rotates, the friction torque caused by the weight of the nacelle and the rotor, and the dynamic torque generated when the nacelle accelerates or decelerates are obtained to obtain the maximum yaw torque of the yaw system; A first torque is obtained according to the maximum yaw torque and a preset coefficient.

[0007] Optionally, obtaining the first torque according to the maximum yaw torque and a preset coefficient includes: According to Ta=Tmax×S, the first torque is obtained; Among them, Ta is the first torque, Tmax is the maximum yaw torque, S is a preset coefficient, and S is greater than or equal to 1.

[0008] Optionally, obtaining a second torque generated between the rotor and the stator when the rotor rotates with the cabin includes: Obtain the torque strength of the rotor and the friction torque between the rotor and the stator when the rotor rotates with the cabin; A second torque is obtained according to the torque intensity and the friction torque.

[0009] Optionally, obtaining the torque strength of the rotor and the friction torque between the rotor and the stator when the rotor rotates with the cabin includes: Obtain the torque strength of the rotor according to Tq=(π / 16)×τ×d³; Where Tq is the torque strength, τ is the shear stress of the rotor material, and d is the diameter of the stator; Obtain the friction torque between the rotor and the stator when the rotor rotates with the cabin, including: The friction torque is obtained according to Tr=μ×F×r; wherein Tr is the friction torque, μ is the friction coefficient of the collector ring, F is the positive pressure of the contact surface between the collector ring brush and the slip ring, and r is the effective radius of the collector ring.

[0010] Optionally, obtaining the second torque according to the torque intensity and the friction torque includes: According to obtain the second torque; Where, is the second torque, is the weight of, and is the weight of.

[0011] Optionally, determining a torque transmission parameter of a yaw collector ring of a wind turbine generator according to the first torque and the second torque includes: According to the torque transmission parameter of the yaw collector ring of the wind turbine generator; Wherein, is the torque transmission parameter, which is a positive integer less than 1.

[0012] The embodiment of the present application further provides a device for determining parameters of a yaw collector ring of a wind turbine generator, comprising: A first acquisition module, used to acquire a first torque generated when the nacelle rotates; A second acquisition module is used to acquire a second torque generated between the rotor and the stator when the rotor rotates with the cabin; A determination module is used to determine a torque transmission parameter of a yaw collector ring of a wind turbine generator according to the first torque and the second torque.

[0013] An embodiment of the present application also provides a rotational electric energy transmission system, including a yaw collector ring of a wind turbine generator, wherein the yaw collector ring of the wind turbine generator includes a stator and a rotor, the stator is fixed to the top of the tower, and the rotor rotates with the nacelle, and the parameters of the yaw collector ring of the wind turbine generator are determined using the method described above.

[0014] An embodiment of the present application further provides a computer storage medium, comprising: storing instructions, and when the instructions are executed on a computer, the computer executes the method described above.

[0015] The above-mentioned embodiment of the present application obtains the first torque generated when the nacelle rotates; obtains the second torque generated between the rotor and the stator when the rotor rotates with the nacelle; determines the torque transmission parameter of the yaw collector ring of the wind turbine generator according to the first torque and the second torque, and calculates the torque transmission capacity required by the collector ring according to the yaw system design of the wind turbine generator and the maximum yaw torque requirement. According to the torque transmission parameter of the yaw collector ring of the wind turbine generator, the corresponding collector ring is determined to ensure that it can reliably transmit torque, thereby avoiding damage to the collector ring during the yaw process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the flow chart of the method for determining the parameters of the yaw collector ring of the wind turbine generator of the present application Figure 2 A schematic diagram of the structure of a power and electric energy rotation transmission system provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of a power and electric energy rotation transmission system provided in an embodiment of the present application; Figure 4 A schematic diagram of a slip ring rotor assembly provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of the temperature and humidity control device provided in an embodiment of the present application.

[0017] Description of reference numerals: 100-collector stator assembly; 200-collector rotor assembly; 210-center tube; 220-conductive slip ring; 230-input terminal; 231-input terminal terminal; 240-positioning ring; 250-yaw bearing; 260-fork plate; 261-stop arm; 2611-limiting groove; 262-rotor cable inlet; 2621-cable sheath; 263-mounting plate; 300-chassis; 400-protective cover; 500-output junction box; 600-output conductive bar; 610-output copper bar; 611-fastener; 710-heater; 720-cooling fan; 730-temperature and humidity controller; 740-temperature sensor; 741-first temperature sensor; 742-second temperature sensor; 750-humidity sensor; 760-temperature alarm; 770-collector power switch; 771-controller power indicator light. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0019] like Figure 1 As shown, an embodiment of the present application provides a method for determining parameters of a yaw collector ring of a wind turbine generator, wherein the yaw collector ring of the wind turbine generator comprises a stator and a rotor, wherein the stator is fixed at the top of the tower, and the rotor rotates with the nacelle, and the method comprises: Step 11, obtaining a first torque generated when the nacelle rotates; Step 12, obtaining a second torque generated between the rotor and the stator when the rotor rotates with the cabin; Step 13: determining a torque transmission parameter of the yaw collector ring of the wind turbine generator according to the first torque and the second torque.

[0020] This embodiment of the present application obtains the first torque generated when the nacelle rotates; obtains the second torque generated between the rotor and the stator when the rotor rotates with the nacelle; determines the torque transmission parameters of the yaw collector ring of the wind turbine according to the first torque and the second torque, and calculates the torque transmission capacity required by the collector ring according to the yaw system design of the wind turbine and the maximum yaw torque requirement. According to the torque transmission parameters of the yaw collector ring of the wind turbine, the corresponding collector ring is determined to ensure that it can reliably transmit torque, thereby avoiding damage to the collector ring during the yaw process.

[0021] like Figure 2-Figure 5As shown, the yaw collector ring of the wind turbine generator in the embodiment of the present application is installed in a power and electric energy rotation transmission system, which includes a collector ring stator assembly 100, a collector ring rotor assembly 200, a chassis 300, a protective cover 400, an output junction box 500 and a temperature and humidity control device.

[0022] The slip ring stator assembly 100 is fixedly installed inside the chassis 300, and the slip ring rotor assembly 200 is rotatably arranged in the slip ring stator assembly 100. The slip ring rotor assembly 200 includes a center tube 210, a conductive slip ring 220, an input terminal 230, a positioning ring 240, a yaw bearing 250 and a fork plate 260. A plurality of conductive slip rings 220 are arranged on the periphery of the center tube 210 in a vertically distributed manner. A plurality of input terminals 230 for connecting cables are connected to the conductive slip rings 220. An input terminal terminal 231 is arranged at the upper end of the input terminal 230 to better achieve connection with the input cable. The upper end of the center tube 210 passes through the top of the chassis 300, and a fork plate 260 is installed on the upper end of the center tube 210 for the input cable to pass through. A positioning ring 240 for limiting and fixing multiple input terminals 230 is connected to the center tube 210 below the fork plate 260. The positioning ring 240 is passed through the upper part of each input terminal 230. The bottom end of the center tube 210 is connected to a yaw bearing 250. The collector ring rotor assembly 200 can rotate relative to the collector ring stator assembly 100 in the chassis 300 through the yaw bearing 250. The bottom end of the center tube 210 is connected to a bearing seat fixedly installed at the lower part of the chassis 300 through the yaw bearing 250. The protective cover 400 is installed below the fork plate 260 and is on the chassis 300. The fork plate 260 is fixedly connected above the protective cover 400. The upper side of the fork plate 260 is fixedly connected with a stop arm 261, and the stop arm 261 is provided with a limiting groove 2611. The fork plate 260 is connected to the wind turbine cabin through the stop arm 261. The collector ring stator assembly 100 can transmit electric energy through sliding contact with the conductive slip ring 220 through a brush mechanism. An output junction box 500 is provided on one side of the chassis 300. The output conductive bar 600 of the collector ring stator assembly 100 is provided on the inner box wall of the output junction box 500. A temperature and humidity control device is also provided in the chassis 300.

[0023] A power electric energy rotation transmission system provided by an embodiment of the present application realizes free rotation by fixing a collector ring stator assembly 100 inside a chassis 300, and installing a collector ring rotor assembly 200 inside the stator assembly 100 through a center tube 210 and a yaw bearing 250. A plurality of conductive slip rings 220 are evenly arranged along the vertical direction on the outer periphery of the center tube 210, and each conductive slip ring 220 is connected with a plurality of input terminals 230 for connecting cables. Since the bottom end of the center tube 210 is supported by the yaw bearing 250, this structure can effectively ensure that the center tube 210 always maintains a stable position and good coaxiality during rotation. Therefore, during the rotation process, the conductive slip ring 220 can continuously and stably maintain reliable contact with the brush mechanism on the stator assembly 100, avoiding the increase of contact resistance and aggravated wear caused by mechanical shaking or displacement, and effectively ensuring the stability and continuity of electric energy transmission.

[0024] At the same time, in the embodiment of the present application, the top of the central tube 210 passes through the top of the chassis 300, and a fork plate 260 is provided. A positioning ring 240 is provided below the fork plate 260, and the positioning ring is used to fix and limit the input terminal 230, so that the position of the input terminal 230 is accurately maintained, thereby avoiding loosening caused by vibration or offset during the rotation of the rotor assembly 200. A stop arm 261 is fixedly connected to the fork plate 260, and a limiting groove 2611 is provided on it. The stop arm 261 is connected to the fork rod of the wind turbine nacelle through the limiting groove 2611, thereby further limiting the yaw position of the rotor assembly 200. This structural layout effectively reduces the impact of mechanical vibration on the conductive contact area, and improves the contact reliability of long-term operation, making the power transmission more stable and efficient.

[0025] In the power and electric energy rotation transmission system of the embodiment of the present application, in terms of the connection method, the output junction box 500 is installed on one side of the chassis 300, and an output conductive bar 600 is provided on the inner box wall thereof, which is used to stably output the electric energy transmitted from the stator assembly 100. In addition, a temperature and humidity control device is also provided in the chassis 300 to effectively control the temperature and humidity inside the chassis, reduce the mechanical size changes or contact instability caused by changes in ambient temperature and humidity, and thus make the power transmission more stable. The protective cover 400 is installed under the fork plate 260 and is connected to the chassis 300 to provide necessary protection for the power transmission area. The combination of the close connection design between the above components and the environmental control measures enables the entire system to maintain a good and stable operating state under different environmental conditions, thereby significantly improving the environmental adaptability and long-term stability of the system, and reducing the maintenance frequency and operation risks.

[0026] In some embodiments, the number of the conductive slip rings 220 is six, and the six conductive slip rings 220 are evenly spaced on the central tube 210. The output conductive bars 600 are electrically connected to the brush mechanism. There are two groups of output conductive bars 600, and each group of output conductive bars 600 includes three output copper bars 610. The output copper bars 610 are U-shaped structures, and each output copper bar 610 is installed with multiple fasteners 611 for clamping the output cables.

[0027] In this embodiment, the number of the conductive slip rings 220 is fixed at six, and this uniform distribution enables the current to be evenly distributed among multiple contact points on the rotor side. The balanced distribution helps to reduce the risk of local overheating and reduce the wear of the conductive slip rings 220 caused by excessive local current. At the same time, multiple input terminals 230 cooperate with the conductive slip rings 220 to form a continuous, low-impedance electrical transmission path, thereby improving the transmission efficiency and stability of the overall system. The output conductive bus 600 is divided into two groups, each group includes three output copper busbars 610, and each output copper busbar 610 adopts a U-shaped structure design. This grouping arrangement enables the power output end to achieve multi-way diversion in a limited space, which not only expands the output area, but also achieves uniform distribution of current.

[0028] The U-shaped structure adopted by the output copper busbar 610 is conducive to improving the heat dissipation efficiency. At the same time, the arrangement of each group of copper busbars is gradually decreasing from top to bottom, which helps to optimize the overall current distribution and electromagnetic field balance, thereby achieving more efficient power output. Each output copper busbar 610 is installed with a plurality of fasteners 611, which are used to firmly clamp the output cable to prevent the cable from loosening or falling off due to vibration or long-term operation during operation. The application of fasteners 611 further strengthens the stable electrical connection between the output conductive busbar 600 and the brush mechanism.

[0029] Through the above-mentioned structural layout and connection design, the electric energy rotation transmission system of this embodiment can better maintain low contact resistance under high-load operating conditions, reduce energy loss and local heating problems caused by poor contact, thereby improving the long-term operation reliability of the system, reducing maintenance frequency, and reducing operation risks.

[0030] In some embodiments, the two groups of output conductive bars 600 are distributed vertically and arranged in a left-right staggered structure, and the degree of outward protrusion of the three output copper bars 610 of each group of output conductive bars 600 decreases from top to bottom.

[0031] In this embodiment, each group of output conductive bars 600 is composed of three output copper bars 610, and the degree of outward protrusion of these three output copper bars 610 decreases step by step from top to bottom. This hierarchical arrangement allows the current to be orderly shunted between the output copper bars 610, avoiding a single copper bar from bearing a large current load too concentratedly. The copper bars 610 located at a higher position and protruding more preferentially carry the current, and then gradually shun it downward, which helps to alleviate the problems of excessive local resistance and heat accumulation, thereby improving the overall transmission efficiency. This hierarchical design in structure objectively achieves a better uniform distribution of current and effectively improves the heat dissipation performance.

[0032] At the same time, in this embodiment, the two groups of output conductive bars 600 are arranged in a vertically distributed and staggered layout. This staggered layout can make the overall structure more balanced. The copper bars 610 staggered in the left and right reduce the crowding of the output conductive bars in the same side area, which is convenient for the reasonable arrangement of cables and effective heat dissipation management. At the same time, the hierarchical prominent layout in the vertical direction forms a reasonable space spacing between the output copper bars 610, effectively controls electromagnetic interference, and facilitates the natural flow and discharge of heat. These measures work together to ensure that the system can still maintain stable operation under long-term and high-power conditions.

[0033] In addition, a plurality of fasteners 611 are installed on each output copper busbar 610, and these fasteners 611 are used to firmly clamp the output cables, thereby realizing a more reliable mechanical fixation and electrical connection between the output cables and the copper busbar. Since the protrusion of the copper busbar 610 decreases from top to bottom, the arrangement of the output cables is more standardized and orderly, effectively avoiding the poor contact problem caused by the chaotic arrangement of the cables, further improving the continuity and stability of the power transmission, reducing the energy loss caused by loose contact, and thus improving the overall reliability of the system under long-term high-load operation environment.

[0034] In some embodiments, a plurality of rotor cable inlets 262 are provided on the fork plate 260 , the number of the rotor cable inlets 262 is consistent with the number of the input terminals 230 , and a cable sheath 2621 is installed at each rotor cable inlet 262 .

[0035] In the structural composition of this embodiment, by pre-opening a plurality of rotor cable inlets 262 on the fork disc 260 and matching their number with the input terminal 230, each rotating side cable can enter at a designated position, thereby avoiding uneven cable distribution. This one-to-one configuration makes the arrangement of the cables inside the rotor assembly more balanced, reduces the poor contact and local heating caused by uneven local loads, and enhances the continuity and stability of power transmission as a whole. In terms of layout, the rotor cable inlets 262 are evenly distributed on the fork disc 260. This careful planning reserves appropriate spacing between the cable inlets, which facilitates the orderly introduction and arrangement of the cables. The cable sheath 2621 installed at each inlet can not only guide the cable, but also protect it during rotation to avoid damage during friction or impact, so that the cable can maintain a good working condition for a long time and further improve the quality of power transmission. In terms of connection relationship, the rotor cable inlet 262 is matched with the input terminal 230 one by one, which helps to avoid confusion in cable connection. The setting of the cable sheath 2621 improves the mechanical strength of the interface and reduces the fatigue of the cable at the interface due to bending vibration, thereby making the electrical contact of the system more stable and bringing greater convenience to subsequent installation, inspection and maintenance. In addition, during high-power transmission, this reliable connection method is conducive to extending the service life of the system and maintaining its high reliability.

[0036] In some embodiments, the temperature and humidity control device includes a heater 710, a heat dissipation fan 720 and a temperature and humidity controller 730. The heater 710 is installed at the inner bottom end of the chassis 300 and is used to heat the air in the chassis 300. The heat dissipation fan 720 is installed on the side of the chassis 300 and is used to blow air to dissipate heat in the chassis 300. The heater 710 and the heat dissipation fan 720 are electrically connected to the temperature and humidity controller 730 respectively. The temperature and humidity controller 730 is installed at the inner bottom end of the chassis 300. The heater 710 and the heat dissipation fan 720 can be started and stopped under the control of the temperature and humidity controller 730.

[0037] The temperature and humidity control device used in this embodiment is composed of a heater 710, a heat dissipation fan 720 and a temperature and humidity controller 730. The heater 710 is installed at the bottom of the chassis 300, and can transfer heat to the chassis space relatively evenly; the heat dissipation fan 720 is located on the side of the chassis 300, and discharges internal heat with the help of lateral airflow; the temperature and humidity controller 730 is set at the bottom of the chassis 300, and is connected to the heater 710 and the heat dissipation fan 720 to form a closed-loop control system. In this way, the various components of the temperature and humidity control device can cooperate to achieve effective regulation of the temperature and humidity inside the chassis, maintain a relatively stable operating environment, and thus reduce the adverse effects of external changes on the power transmission components.

[0038] At the same time, in this embodiment, the heater 710, the heat dissipation fan 720 and the temperature and humidity controller 730 of the temperature and humidity control device are arranged reasonably inside the chassis 300. The heater 710 is located at the bottom. When the temperature inside the chassis is too low, the temperature inside the chassis can be raised in time to reduce the shrinkage or condensation of components caused by low temperature; the heat dissipation fan 720 is installed on the side to quickly discharge the excess heat in the chassis by lateral ventilation to avoid performance degradation caused by high temperature; the temperature and humidity controller 730 is close to the bottom for easy installation, and can automatically start or stop the heater 710 and the heat dissipation fan 720 according to the set threshold in actual application. This layout realizes the flexible response of temperature and humidity control as a whole, and plays a good role in maintaining the smooth operation of the system. Moreover, this design method makes the heater 710 and the heat dissipation fan 720 centrally managed by the temperature and humidity controller 730, which is convenient for automatic adjustment. When the temperature inside the chassis reaches or exceeds the preset value, the temperature and humidity controller 730 starts the cooling fan 720 to cool down; when the temperature is too low, the heater 710 is used to supplement the heat. This helps to keep the inside of the chassis in a relatively suitable temperature and humidity range, reducing the size changes and contact obstacles of components caused by temperature and humidity fluctuations. It can be seen that during high-power transmission, the system as a whole can maintain low contact resistance and high transmission efficiency, extend the service life of the device, and reduce maintenance frequency and operation risks.

[0039] In some embodiments, the temperature and humidity control device also includes a temperature sensor 740 and a humidity sensor 750, which are respectively connected to the temperature and humidity controller 730. The temperature sensor 740 includes a plurality of first temperature sensors 741 arranged at different positions inside the chassis 300 and a second temperature sensor 742 arranged on the outside of the output junction box 500. The humidity sensor 750 is set on the inner side of the top plate of the chassis 300.

[0040] In the structural composition of this embodiment, by further providing a temperature sensor 740 and a humidity sensor 750 for the temperature and humidity control device, a more complete environmental monitoring system is formed. Moreover, the temperature sensor 740 is further subdivided into a plurality of first temperature sensors 741 arranged at different positions inside the chassis 300 and a second temperature sensor 742 arranged outside the output junction box 500. This multi-point monitoring structure layout enables the temperature status of the internal and external areas of the chassis to be detected in a timely and accurate manner, providing sufficient data support for subsequent control. At the same time, the humidity sensor 750 is installed on the inner side of the top plate of the chassis 300, which helps to capture the humidity changes that may occur on the top of the chassis, thereby achieving comprehensive monitoring of the overall environment.

[0041] In terms of layout, this embodiment fully considers the comprehensiveness and representativeness of environmental information collection. The first temperature sensor 741 is distributed in different areas inside the chassis, so that it can better reflect the temperature distribution of the entire internal space; and the second temperature sensor 742 monitors the temperature changes outside the output junction box 500, making up for the blind spots that may exist in internal monitoring. The humidity sensor 750 is installed on the inside of the chassis top plate because the top of the chassis is more susceptible to external humidity. The layout of each sensor is reasonable and can quickly capture local temperature and humidity fluctuations, thereby providing accurate data for the temperature and humidity control device, ensuring that the system can respond to temperature or humidity changes in a timely manner.

[0042] In terms of connection relationship, the temperature sensor 740 and the humidity sensor 750 are both electrically connected to the temperature and humidity controller 730, forming a real-time feedback loop. This close electrical connection enables the temperature and humidity controller 730 to continuously obtain environmental data from each monitoring point, thereby achieving precise control of the heater 710 and the cooling fan 720 device. Through this control mechanism, the system of this embodiment can quickly adjust when an abnormality occurs in the internal environment to achieve a relatively stable temperature and humidity state. As a result, the size change and poor contact problems of mechanical components caused by environmental fluctuations are effectively avoided, thereby ensuring the continuity and efficiency of high-power power transmission.

[0043] In some embodiments, the temperature and humidity control device further includes a temperature alarm 760, which is disposed on the fork plate 260, and a mounting plate 263 is fixedly disposed on one side of the edge of the fork plate 260, and the temperature alarm 760 is fixedly mounted on the mounting plate 263, and the temperature alarm 760 is connected to the temperature and humidity controller 730 and can sound an alarm under the control of the temperature and humidity controller 730; There are six first temperature sensors 741, and the positions and heights of the six first temperature sensors 741 correspond to the heights of the conductive slip rings 220 respectively. When the temperature T1 detected by any one of the six first temperature sensors 741 exceeds 85°C, the temperature and humidity controller 730 controls the temperature alarm 760 to sound an alarm.

[0044] In this embodiment, by installing a temperature alarm 760 on the fork plate 260, when any of the first temperature sensors 741 detects that the temperature exceeds 85°C, the temperature and humidity controller 730 will quickly trigger the temperature alarm 760 to alarm, helping the system to issue a warning in time at the early stage of temperature abnormality, thereby reducing problems such as local overheating and electrical contact failure caused by excessive temperature. In terms of layout, the first temperature sensors 741 are distributed inside the chassis 300, and the number is 6, which are respectively aligned with the height position of the conductive slip ring 220. This distribution method helps to monitor the temperature of the key power transmission area and avoid local temperature blind spots. After collecting these evenly distributed temperature data, the temperature and humidity controller 730 can more accurately determine the overall temperature level of the transmission area, thereby realizing precise control of the temperature alarm 760, so that the system can react faster when the temperature is abnormal, and improve the overall environmental adaptability and operation safety. The temperature alarm 760 is fixedly installed on one side of the edge of the fork plate using the mounting plate 263. The fixed installation of the temperature alarm 760 and the mounting plate 263 makes it difficult for the position of the temperature alarm 760 to shift. In this embodiment, through such control logic, when any first temperature sensor 741 detects that the temperature T1 exceeds 85°C, the temperature and humidity controller 730 can activate the alarm mechanism in time, thereby helping the entire power transmission system to maintain low contact resistance and stable transmission under high-power operation, thereby reducing the risk of failure.

[0045] In some embodiments, the temperature and humidity control device further includes a collector ring power switch 770, the collector ring power switch 770 is arranged at the lower side of the output junction box 500, and the lower side of the output junction box 500 is also provided with a controller power indicator light 771 located above the collector ring power switch 770, the collector ring power switch 770 is a knob switch, the collector ring power switch 770 is connected to the tower wall uninterruptible power supply through a wire, and the collector ring power switch 770 is electrically connected to the temperature and humidity controller 730; The temperature and humidity controller 730 can realize heat dissipation, low-temperature condensation prevention and moisture removal operations inside the chassis 300 by controlling the heat dissipation fan 720 and the heater 710 when receiving temperature data from the first temperature sensor 741, the second temperature sensor 742 and the humidity data from the humidity sensor 750; The control logic configuration of the temperature and humidity controller 730 is as follows: When the temperature T1 detected by any first temperature sensor 741 is ≥45°C, the temperature and humidity controller 730 implements a control strategy for heat dissipation: the temperature and humidity controller 730 controls the heat dissipation fan 720 to turn on and keep it on for a preset time; after the preset time is reached, if the temperature T1 detected by each first temperature sensor 741 is ≤40°C, the heat dissipation fan 720 is controlled to turn off, otherwise, the heat dissipation fan 720 continues to be turned on; When the temperature T2 detected by the second temperature sensor 742 is less than 0°C and the temperature T1 detected by any of the first temperature sensors 741 is less than or equal to 5°C, the temperature and humidity controller 730 implements a control strategy for low-temperature anti-condensation operation: the temperature and humidity controller 730 controls the heater 710 to turn on for heating until the temperature T1 detected by each of the first temperature sensors 741 is greater than or equal to 10°C, then stops heating; When the temperature detected by the second temperature sensor 742 is 0℃≤T1<35℃, the temperature and humidity controller 730 implements the control strategy for moisture removal operation: if the temperature T1 detected by any of the first temperature sensor 741 and the temperature T2 detected by the second temperature sensor 742 satisfies T1<T2+2℃, the temperature and humidity controller 730 controls the heater 710 to turn on for heating, and stops heating when T1≥T2+5℃ and the humidity detected by the humidity sensor 750 is ≤40%.

[0046] In this embodiment, by setting the collector ring power switch 770 and the controller power indicator light 771, the temperature and humidity control device can form a more intuitive and reliable power management system. The collector ring power switch 770 adopts a knob design and is connected to the uninterruptible power supply of the tower wall through a wire, which can provide a stable power supply for the system. At the same time, the indicator light 771 is installed above the switch and can display the power status in real time. This tightly integrated design allows the operator to understand the power supply of the system more intuitively and quickly perform manual control or adjustment when necessary, which helps to improve the safety and operation stability of the system.

[0047] At the same time, in this embodiment, the temperature and humidity controller 730 is connected to a plurality of first temperature sensors 741, second temperature sensors 742 and humidity sensors 750, and a multi-point monitoring feedback system is constructed. Each sensor is arranged in the internal key area of ​​the chassis 300 and the outside of the output junction box 500, respectively, to better obtain the environmental data of the chassis. Based on these data, the temperature and humidity controller 730 controls the start and stop of the cooling fan 720 and the heater 710 according to the pre-set logic, so as to perform more accurate temperature and humidity control inside the chassis. Through this dynamic adjustment method, the system of this embodiment can reduce the expansion, condensation or poor contact of components caused by excessively high or low ambient temperature, and further maintain the continuity and efficiency of power transmission.

[0048] In addition, in this embodiment, by closely combining the collector ring power switch 770 with the temperature and humidity controller 730, a control system integrating environmental management and power supply management is formed. When the temperature and humidity controller 730 receives data from multiple temperature sensors and humidity sensors, it will use segmented control logic to make timely adjustments to the cooling fan 720 and the heater 710: if the temperature exceeds the preset upper limit, the cooling mode is started; when the temperature is lower than the lower limit, the anti-condensation heating is triggered; when the specific humidity conditions are met, the moisture removal adjustment is performed. By using this data-driven control mechanism, the system in this embodiment can better reduce the risk of size changes and contact instability of mechanical components caused by temperature and humidity fluctuations, thereby maintaining better reliability and transmission efficiency in long-term operation.

[0049] In some embodiments, the heat dissipation fan 720 is an axial flow fan equipped with a filter.

[0050] In this embodiment, the heat dissipation fan 720 uses an axial flow fan equipped with a filter. During use, the air is first filtered through the filter before entering the fan, which can prevent dust and impurities from entering the chassis 300, thereby protecting the internal components of the fan from pollution, and also helping the fan to maintain good heat dissipation efficiency during long-term operation, reducing performance degradation caused by pollution. The use of the axial flow fan allows the air to maintain a relatively stable and uniform flow direction, thereby forming an efficient heat dissipation airflow inside the chassis.

[0051] In some embodiments, the cable sheath 2621 is a sheath made of rubber material.

[0052] In this embodiment, the cable sheath 2621 is made of rubber material. Rubber has good flexibility and wear resistance and can remain intact under repeated bending and mechanical stress. In addition, due to its excellent insulation performance, it can also better block external interference and reduce the loss caused by friction. This material selection helps to provide more complete protection for the cable in long-term operation.

[0053] At the same time, the cable sheath 2621 is evenly installed at each cable inlet 262 and matches each input terminal 230. This arrangement allows all cables entering the system to receive consistent protection at the cable inlet 262. The rubber sheath tightly covers the cable inlet 262, which can effectively block the intrusion of environmental pollutants such as dust and moisture, thereby maintaining good electrical contact and transmission performance.

[0054] In addition, the use of rubber material in the cable sheath 2621 provides a certain degree of flexible transition and buffering between the cable and the cable inlet 262. It can play a role in shock and friction prevention at the cable inlet 262, and reduce the looseness or wear of the interface caused by mechanical vibration and temperature changes. Through this reliable connection method, the system can maintain relatively stable power transmission under high load and long-term operation conditions, which helps each connection point maintain better electrical performance while reducing maintenance frequency and operation risks.

[0055] In an optional embodiment of the present application, in step 11, obtaining a first torque generated when the nacelle rotates includes: Step 111, obtaining the wind load torque generated by the wind load on the nacelle when the nacelle rotates, the friction torque caused by the weight of the nacelle and the rotor, and the dynamic torque generated when the nacelle accelerates or decelerates, and obtaining the maximum yaw torque of the yaw system; Step 112: Obtain a first torque according to the maximum yaw torque and a preset coefficient.

[0056] In this embodiment, when the nacelle is yawed, the rotating part of the collector ring will be subjected to a certain torque, such as torque caused by rotational inertia, so the collector ring needs to have a certain torque transmission capacity, or its supporting structure needs to be able to withstand a certain torque. When the yaw system starts or stops, there may be dynamic torque, or the static torque caused by wind load needs to be borne by the structure of the collector ring; the torque transmission capacity required by the collector ring = maximum yaw torque × safety factor, and the maximum yaw torque is usually determined by the design parameters of the wind turbine, such as wind load, weight distribution of the nacelle and rotor, friction coefficient of the yaw bearing, etc. The calculation of the maximum yaw torque may involve the following factors: the torque generated by the wind load on the nacelle, the friction torque caused by the weight of the nacelle and rotor, and the dynamic torque of the yaw drive system during acceleration or deceleration. The torque transmission capacity required by the collector ring may need to be calculated based on this maximum torque to ensure that the collector ring does not fail mechanically in extreme cases.

[0057] Here, wind load torque = a×ρ×A×V 2 ×C×d; where ρ is the air density (kg / m³), A is the windward area of ​​the cabin (m²), V is the design wind speed (m / s), C is the wind torque coefficient (dimensionless, determined by experiment or simulation), d is the distance from the wind pressure center to the yaw axis (m), and a is a constant between 1 and 1; Friction torque = μ × F × avg , where μ is the friction coefficient of the yaw bearing, F is the total load on the bearing (N, including the nacelle weight and the axial component of the wind load), r avg is the average friction radius of the bearing, Where, is the outer diameter of the yaw bearing, is the inner diameter of the yaw bearing, and b is a constant between 0 and 0.5; Inertia torque = T_a = I × α, where I is the moment of inertia of the nacelle and rotor (kg·m²) and α is the yaw acceleration (rad / s²).

[0058] In an optional embodiment of the present application, in step 112, obtaining the first torque according to the maximum yaw torque and the preset coefficient includes: According to Ta=Tmax×S, the first torque is obtained, wherein Ta is the first torque, Tmax is the maximum yaw torque, S is a preset coefficient, and S is greater than or equal to 1. Tmax=wind load torque+friction torque+inertia torque.

[0059] In this embodiment, the collector ring is used as part of the transmitted torque, that is, the collector ring itself needs to transmit the torque generated by the yaw system. This may happen when the collector ring is designed to withstand mechanical torque, for example, if the collector ring is designed to have the function of a mechanical coupling, or its installation method needs to transmit part of the torque. In this case, the torque transmission capacity of the collector ring needs to be at least equal to or greater than the maximum torque required by the system, multiplied by a certain safety factor.

[0060] In an optional embodiment of the present application, in step 12, obtaining a second torque generated between the rotor and the stator when the rotor rotates with the cabin includes: Step 121, obtain the torque strength of the rotor and the friction torque between the rotor and the stator when the rotor rotates with the cabin; specifically, the torque strength of the rotor can be obtained according to Tq=(π / 16)×τ×d³; wherein Tq is the torque strength, τ is the shear stress of the rotor material, and d is the diameter of the stator; the calculation of the torque transmission capacity of the collector ring needs to consider the maximum shear stress that its mechanical structure can withstand, the friction force of the contact surface, etc.

[0061] Step 122, obtaining a second torque according to the torque strength and the friction torque. Specifically, the friction torque can be obtained according to Tr=μ×F×r; wherein Tr is the friction torque, μ is the friction coefficient of the collector ring, F is the normal pressure of the contact surface between the collector ring brush and the slip ring, and r is the effective radius of the collector ring.

[0062] In this embodiment, the friction torque of the collector ring is one of the loads of the yaw system and needs to be overcome by the yaw drive system. At this time, the friction torque of the collector ring should be calculated into the total yaw load torque. According to the torque strength and the friction torque, the second torque is obtained, which may include: The second torque is obtained according to ; where is the second torque, is the weight of , and is the weight of .

[0063] The friction torque and torque strength of the collector ring itself are comprehensively considered to determine the torque that the collector ring itself can provide, so that the torque transmission parameters of the collector ring are determined more accurately.

[0064] In addition, if the stator part of the collector ring is fixed to the tower and the rotor part rotates with the yaw, then when the nacelle rotates, the collector ring structure may be subjected to the torque caused by the rotation, especially when it is suddenly started or stopped, the inertia moment may generate a torque load on the collector ring structure. At this time, the structural strength of the collector ring needs to be able to withstand this dynamic torque.

[0065] In an optional embodiment of the present application, in step 13, determining the torque transmission parameter of the yaw collector ring of the wind turbine generator according to the first torque and the second torque includes: Step 131, obtaining the torque transfer parameter of the yaw collector ring of the wind turbine generator; wherein is the torque transfer parameter, which is a positive integer less than 1.

[0066] In this embodiment, when it is infinitely close to 1, the torque transmission parameter is the maximum torque required by the system, which can avoid damage to the collector ring to the greatest extent.

[0067] The embodiment of the present application further provides a device for determining parameters of a yaw collector ring of a wind turbine generator, comprising: A first acquisition module, used to acquire a first torque generated when the nacelle rotates; A second acquisition module is used to acquire a second torque generated between the rotor and the stator when the rotor rotates with the cabin; A determination module is used to determine a torque transmission parameter of a yaw collector ring of a wind turbine generator according to the first torque and the second torque.

[0068] Optionally, obtaining a first torque generated when the nacelle rotates includes: The wind load torque generated by the wind load on the nacelle when the nacelle rotates, the friction torque caused by the weight of the nacelle and the rotor, and the dynamic torque generated when the nacelle accelerates or decelerates are obtained to obtain the maximum yaw torque of the yaw system; A first torque is obtained according to the maximum yaw torque and a preset coefficient.

[0069] Optionally, obtaining the first torque according to the maximum yaw torque and a preset coefficient includes: According to Ta=Tmax×S, the first torque is obtained; Among them, Ta is the first torque, Tmax is the maximum yaw torque, S is a preset coefficient, and S is greater than or equal to 1.

[0070] Optionally, obtaining a second torque generated between the rotor and the stator when the rotor rotates with the cabin includes: Obtain the torque strength of the rotor and the friction torque between the rotor and the stator when the rotor rotates with the cabin; A second torque is obtained according to the torque intensity and the friction torque.

[0071] Optionally, obtaining the torque strength of the rotor and the friction torque between the rotor and the stator when the rotor rotates with the cabin includes: Obtain the torque strength of the rotor according to Tq=(π / 16)×τ×d³; Where Tq is the torque strength, τ is the shear stress of the rotor material, and d is the diameter of the stator; Obtain the friction torque between the rotor and the stator when the rotor rotates with the cabin, including: Obtain the friction torque according to Tr=μ×F×r; Among them, Tr is the friction torque, μ is the friction coefficient of the collector ring, F is the positive pressure of the contact surface between the collector ring brush and the slip ring, and r is the effective radius of the collector ring.

[0072] Optionally, obtaining the second torque according to the torque intensity and the friction torque includes: According to obtain the second torque; Where, is the second torque, is the weight of, and is the weight of.

[0073] Optionally, determining a torque transmission parameter of a yaw collector ring of a wind turbine generator according to the first torque and the second torque includes: According to the torque transmission parameter of the yaw collector ring of the wind turbine generator; Wherein, is the torque transmission parameter, which is a positive integer less than 1.

[0074] It should be noted that the device is a device corresponding to the above method, and all implementation methods in the above method embodiments are applicable to the embodiments of the device and can achieve the same technical effects.

[0075] An embodiment of the present application also provides a rotational electric energy transmission system, including a yaw collector ring of a wind turbine generator, wherein the yaw collector ring of the wind turbine generator includes a stator and a rotor, the stator is fixed to the top of the tower, and the rotor rotates with the nacelle, and the parameters of the yaw collector ring of the wind turbine generator are determined using the method described above.

[0076] The specific implementation of this system is as follows Figures 2 to 5 In the embodiments shown, all implementations of the above methods and devices are applicable to the embodiments of the system and can achieve the same technical effects.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for determining parameters of a yaw collector ring of a wind turbine, characterized in that: The yaw collector ring of a wind turbine generator comprises: a stator and a rotor, wherein the stator is fixed on the top of a tower and the rotor rotates with the nacelle. The method comprises: acquiring a first torque generated when the nacelle rotates; Acquire a second torque generated between the rotor and the stator when the rotor rotates with the cabin; A torque transmission parameter of the yaw collector ring of the wind turbine generator is determined according to the first torque and the second torque.

2. The method for determining parameters of a yaw collector ring of a wind turbine according to claim 1, characterized in that: The first torque generated when the nacelle rotates is obtained, including: The wind load torque generated by the wind load on the nacelle when the nacelle rotates, the friction torque caused by the weight of the nacelle and the rotor, and the dynamic torque generated when the nacelle accelerates or decelerates are obtained to obtain the maximum yaw torque of the yaw system; A first torque is obtained according to the maximum yaw torque and a preset coefficient.

3. The method for determining parameters of a yaw collector ring of a wind turbine according to claim 2, characterized in that: Obtaining a first torque according to the maximum yaw torque and a preset coefficient includes: According to Ta=Tmax×S, the first torque is obtained; Among them, Ta is the first torque, Tmax is the maximum yaw torque, S is a preset coefficient, and S is greater than or equal to 1.

4. The method for determining parameters of a yaw collector ring of a wind turbine according to claim 3, characterized in that: The second torque generated between the rotor and the stator when the rotor rotates with the cabin is obtained, including: Obtain the torque strength of the rotor and the friction torque between the rotor and the stator when the rotor rotates with the cabin; A second torque is obtained according to the torque intensity and the friction torque.

5. The method for determining parameters of a yaw collector ring of a wind turbine according to claim 4, characterized in that: Obtain the torque strength of the rotor and the friction torque between the rotor and the stator when the rotor rotates with the cabin, including: Obtain the torque strength of the rotor according to Tq=(π / 16)×τ×d³; Where Tq is the torque strength, τ is the shear stress of the rotor material, and d is the diameter of the stator; Obtain the friction torque between the rotor and the stator when the rotor rotates with the cabin, including: Obtain the friction torque according to Tr=μ×F×r; Among them, Tr is the friction torque, μ is the friction coefficient of the collector ring, F is the positive pressure of the contact surface between the collector ring brush and the slip ring, and r is the effective radius of the collector ring.

6. The method for determining parameters of a yaw collector ring of a wind turbine according to claim 5, characterized in that: According to the torque intensity and the friction torque, a second torque is obtained, including: According to obtain the second torque; Where, is the second torque, is the weight of, and is the weight of.

7. The method for determining parameters of a yaw collector ring of a wind turbine according to claim 6, characterized in that: Determining a torque transmission parameter of a yaw collector ring of a wind turbine generator according to the first torque and the second torque includes: According to the torque transmission parameter of the yaw collector ring of the wind turbine generator; Wherein, is the torque transmission parameter, which is a positive integer less than 1.

8. A device for determining parameters of a yaw collector ring of a wind turbine, characterized in that: include: A first acquisition module, used to acquire a first torque generated when the nacelle rotates; A second acquisition module is used to acquire a second torque generated between the rotor and the stator when the rotor rotates with the cabin; A determination module is used to determine a torque transmission parameter of a yaw collector ring of a wind turbine generator according to the first torque and the second torque.

9. A rotary electric energy transmission system, comprising a yaw collector ring of a wind turbine, wherein the yaw collector ring of the wind turbine comprises a stator and a rotor, wherein the stator is fixed to the top of a tower, and the rotor rotates with the nacelle, and the parameters of the yaw collector ring of the wind turbine are determined by the method described in any one of claims 1 to 7.

10. A computer storage medium, characterized in that: include: Instructions are stored, and when the instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 7.

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