Light emitting diode display panel and manufacturing method thereof

Abstract

This invention belongs to the field of lightning suppression control and proposes a lightning suppression control system and method based on wind farms. The main scheme is as follows: A first threshold and a second threshold are set in the control unit. The remaining service life information of the components contained in the pilot channel is compared with the first threshold, and the remaining service life information of the components contained in the lightning suppression channel is compared with the second threshold. When the remaining service life information of the components contained in the pilot channel is lower than the first threshold and / or the remaining service life information of the components contained in the lightning suppression channel is lower than the second threshold, a first notification command is sent to the communication control unit. A communication control strategy is set in the communication control unit, and upon receiving the first notification command from the control unit, a maintenance command is sent to the local control center or a remote control center by selecting the corresponding control strategy. This invention can accurately monitor all components used in the lightning suppression process and promptly notify relevant personnel for maintenance.

Description

Technical Field

[0001] This invention relates to the field of lightning suppression and control technology, and particularly to a lightning suppression control system and method based on wind farms. Background Technology

[0002] Currently, after lightning suppression devices are installed on the high-voltage cables of wind farms, in the event of a lightning strike, if the internal circuits absorb lightning or electrical components are damaged by lightning and need to be reinstalled, the results of the lightning suppression device's operation due to the lightning strike must be transmitted to the local control center and remote control center of the wind farm. Wind farms typically have limited staff, with many workers primarily involved in equipment inspections and maintenance of wind turbine-related equipment. While the local control center can provide some data monitoring, signal strength is often poor in most wind farm areas, making it difficult for staff to quickly respond to lightning suppression device malfunctions, hindering timely replacement and repair. Given the already limited staff, adding extra inspection and maintenance work could impact the overall production capacity of the wind farm.

[0003] Meanwhile, when using lightning suppression devices to suppress lightning, an integrated condition monitoring device is usually used. However, lightning suppression can not only suppress lightning when it occurs, but also form an aerial capacitor between the device and the wind farm when there are thunderclouds near the wind farm. The aerial capacitor itself will also store a certain amount of charge, and the lightning suppression device also needs to eliminate these charges to reduce the risk of lightning strikes. Therefore, the integrated condition monitoring device obviously cannot meet the monitoring requirements of lightning suppression devices. Summary of the Invention

[0004] The purpose of this invention is to provide a lightning suppression control system and method based on wind farms, which can accurately monitor all components used in the lightning suppression process and promptly notify relevant personnel for maintenance.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows:

[0006] On one hand, the present invention provides a lightning suppression control system based on a wind farm, comprising:

[0007] The lightning suppression unit includes a leader channel and a lightning suppression channel, which are used to dissipate lightning using the leader channel and to reduce the steepness and amplitude of the lightning wave using the lightning suppression channel.

[0008] The first monitoring unit is used to monitor the remaining service life information of the components contained in the pilot channel;

[0009] The second monitoring unit is used to monitor the remaining service life information of the components contained in the lightning suppression channel;

[0010] The control unit is configured with a first threshold and a second threshold, which are used to compare the remaining service life information of the components contained in the pilot channel with the first threshold and compare the remaining service life information of the components contained in the lightning suppression channel with the second threshold. When the remaining service life information of the components contained in the pilot channel is lower than the first threshold and / or the remaining service life information of the components contained in the lightning suppression channel is lower than the second threshold, a first notification instruction is sent to the communication control unit.

[0011] The communication control unit is equipped with a communication control strategy, which is used to send maintenance instructions to the local control center or remote control center by selecting the corresponding control strategy when it receives the first notification instruction from the control unit.

[0012] As a further optimization, the lightning suppression unit is equipped with a standard lightning electric field strength threshold. When the real-time lightning electric field strength value is lower than the standard lightning strength threshold, the lightning suppression unit controls the use of the pilot channel to dissipate the lightning. When the real-time lightning electric field strength value is higher than the standard lightning strength threshold, the lightning suppression unit controls the use of the lightning suppression channel to reduce the steepness and amplitude of the lightning wave.

[0013] As a further optimization, the first threshold is greater than the second threshold.

[0014] As a further optimization, the pilot channel includes components including a first capacitor and a first inductor, and the lightning suppression channel includes an adjustable resistor and a second inductor;

[0015] The remaining service life information of the components contained in the pilot channel refers to the average remaining service life of the first capacitor and the first inductor.

[0016] The remaining service life information of the components contained in the lightning suppression channel refers to the remaining service life of the adjustable resistor and the second inductor.

[0017] As a further optimization, the control unit is equipped with a timer. The timer counts the first number of times lightning dissipates and the second number of times the steepness and amplitude of the lightning wave are reduced. When the first or second count reaches the corresponding preset number, and the remaining service life information of the components contained in the pilot channel is higher than the first threshold, and the remaining service life information of the components contained in the lightning suppression channel is higher than the second threshold, the control unit sends a second notification instruction to the communication control unit every first predetermined time.

[0018] When the first or second count does not reach the corresponding preset number of times, and the remaining service life information of the components contained in the pilot channel is higher than the first threshold, and the remaining service life information of the components contained in the lightning suppression channel is higher than the second threshold, the control unit sends a third notification instruction to the communication control unit every second predetermined time.

[0019] The first specified time is less than the second specified time.

[0020] As a further optimization, the communication control strategy set in the communication control unit refers to:

[0021] When the communication control unit receives the first notification instruction, it simultaneously sends maintenance instructions to the maintenance terminal, the local control center, and the remote control center within the communication range.

[0022] When the communication control unit receives the second notification instruction, it sends the maintenance instruction to the maintenance terminal and the local control center within the communication range, and forwards the maintenance instruction to the remote control center through the maintenance terminal or the local control center.

[0023] When the communication control unit receives a third notification instruction, it sends a maintenance instruction to the local control center and forwards the maintenance instruction to the maintenance terminal and remote control center within the communication range through the local control center.

[0024] On the other hand, the present invention provides a lightning suppression control method based on a wind farm, which is applied to the aforementioned lightning suppression control system based on a wind farm, and includes the following steps:

[0025] Lightning is dissipated using the leader channel in the lightning suppression unit, and the steepness and amplitude of the lightning wave are reduced using the lightning suppression channel in the lightning suppression unit.

[0026] The remaining service life information of the components contained in the pilot channel is monitored by the first monitoring unit;

[0027] The remaining service life information of the components contained in the lightning suppression channel is monitored by the second monitoring unit;

[0028] The control unit sets a first threshold and a second threshold, compares the remaining service life information of the components contained in the pilot channel with the first threshold, and compares the remaining service life information of the components contained in the lightning suppression channel with the second threshold. When the remaining service life information of the components contained in the pilot channel is lower than the first threshold and / or the remaining service life information of the components contained in the lightning suppression channel is lower than the second threshold, a first notification instruction is sent to the communication control unit.

[0029] The communication control unit sets the communication control strategy, and upon receiving the first notification instruction from the control unit, sends the maintenance instruction to the local control center or remote control center by selecting the corresponding control strategy.

[0030] The beneficial effects of this invention are as follows: This invention addresses two potential lightning risk scenarios in wind farms by setting corresponding monitoring units for the pilot channel and lightning suppression channel in the lightning suppression unit, respectively. This allows for precise monitoring of the safe operation of all components. Furthermore, this invention includes a communication control strategy. Under different conditions of the lightning suppression unit, different communication control strategies can be used to select a remote control center or a local control center to monitor whether the lightning suppression device needs replacement after a lightning strike and to assess its lightning absorption status. This ensures that lightning-prone locations on the high-voltage cables of the wind farm have intact lightning suppression devices, thereby preventing direct damage to the cables by lightning and reducing the workload for staff. It also minimizes the notification time when the device malfunctions, reducing the impact on the wind farm to the lowest possible level. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the composition structure of the lightning suppression control system based on a wind farm in Embodiment 1 of the present invention;

[0032] Figure 2 This is a schematic diagram of the equivalent circuit of the pilot channel and the lightning suppression channel in the air when there is lightning in Embodiment 1 of the present invention;

[0033] Figure 3 This is a flowchart of the lightning suppression and control method based on a wind farm in Embodiment 2 of the present invention.

[0034] Where C represents the first capacitor, R represents the adjustable resistor, and L represents the same inductor that is reused by the first and second inductors. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Example 1

[0037] This embodiment provides a lightning suppression control system based on a wind farm. See the schematic diagram of its structure below. Figure 1 The system includes:

[0038] The lightning suppression unit includes a leader channel and a lightning suppression channel, which are used to dissipate lightning using the leader channel and to reduce the steepness and amplitude of the lightning wave using the lightning suppression channel.

[0039] The first monitoring unit is used to monitor the remaining service life information of the components contained in the pilot channel;

[0040] The second monitoring unit is used to monitor the remaining service life information of the components contained in the lightning suppression channel;

[0041] The control unit is configured with a first threshold and a second threshold, which are used to compare the remaining service life information of the components contained in the pilot channel with the first threshold and compare the remaining service life information of the components contained in the lightning suppression channel with the second threshold. When the remaining service life information of the components contained in the pilot channel is lower than the first threshold and / or the remaining service life information of the components contained in the lightning suppression channel is lower than the second threshold, a first notification instruction is sent to the communication control unit.

[0042] The communication control unit is equipped with a communication control strategy, which is used to send maintenance instructions to the local control center or remote control center by selecting the corresponding control strategy when it receives the first notification instruction from the control unit.

[0043] Since the lightning suppression unit in this embodiment can handle both situations—namely, the risk of lightning strikes occurring but not in which lightning is dissipated via a pilot channel, and the risk of lightning strikes occurring but in which lightning is suppressed to reduce the steepness and intensity of the lightning wave—therefore, it is necessary to monitor both scenarios separately. This requires setting a standard lightning electric field strength threshold and comparing the real-time lightning electric field strength to this threshold to determine whether to introduce the lightning into the pilot channel or the lightning suppression channel. Therefore, in this embodiment, the lightning suppression unit is equipped with a standard lightning electric field strength threshold. When the real-time lightning electric field strength is lower than the threshold, the lightning suppression unit controls the pilot channel to dissipate the lightning. When the real-time lightning electric field strength is higher than the threshold, the lightning suppression unit controls the lightning suppression channel to reduce the steepness and amplitude of the lightning wave.

[0044] It should be noted that when lightning is ablated through the pilot channel, the lightning voltage is relatively lower than the lightning voltage at the time of the lightning strike. Even if the lightning is dissipated through the pilot channel, it will not cause the electrical components in the pilot channel to break down. Therefore, the number of times each component in the pilot channel can dissipate lightning is relatively more than the number of times lightning will break down. In other words, when the steepness and amplitude of the lightning wave are reduced through the lightning suppression channel, the electrical components used in the lightning suppression channel are more likely to break down because the instantaneous lightning voltage is high when the lightning strike occurs. Therefore, the first threshold needs to be greater than the second threshold.

[0045] In practical applications, the threshold voltage corresponding to the second threshold can be 20kV. That is, when there is space charge around the lightning suppression unit, forming a space voltage, if the space voltage ranges from 0-20kV, then the lightning is ablated through the pilot channel. The threshold voltage corresponding to the first threshold can be 30kV. That is, when there is space charge around the lightning suppression unit, forming a space voltage, if the space voltage reaches 30kV, then the steepness and amplitude of the lightning wave are reduced through the lightning suppression channel. Here, both the first and second thresholds can be adjusted and set according to actual needs, and are not limited to the specific voltage values ​​mentioned above.

[0046] See Figure 2 The equivalent circuit diagram of the pilot channel and the lightning suppression channel when there is lightning in the air is shown. In this embodiment, the pilot channel has capacitive characteristics. Lightning can be eliminated by charging and discharging the air charge using a capacitor component. The lightning suppression channel has high resistance characteristics to cope with the instantaneous high voltage when lightning strikes. Therefore, in this embodiment, the components of the pilot channel include a first capacitor C and a first inductor, and the lightning suppression channel includes an adjustable resistor R and a second inductor.

[0047] The remaining service life information of the components contained in the pilot channel refers to the average remaining service life of the first capacitor C and the first inductor; the remaining service life information of the components contained in the lightning suppression channel refers to the remaining service life of the adjustable resistor R and the second inductor.

[0048] In practical applications, the damage to the first and second inductors is not significant when using the pilot channel for lightning dissipation and the lightning suppression channel to reduce the steepness and amplitude of the lightning wave. Even with subsequent maintenance, there is a low safety risk. Therefore, they can be reused as the same inductor L.

[0049] Generally, after the lightning suppression unit is installed and put into use in a wind farm, if there are no lightning strikes or the frequency of lightning strikes is low, then the electrical components in the lightning suppression channel have a relatively long remaining service life. In this case, only normal component monitoring is required. However, if the frequency of lightning strikes becomes high, then the number of times the pilot channel dissipates lightning and the number of times the lightning suppression channel reduces the steepness and amplitude of lightning waves should be accurately counted. This is to promptly notify the local control center of the wind farm and the maintenance terminals within the communication range for subsequent maintenance.

[0050] Therefore, in this embodiment, the control unit is equipped with a timer to count the first number of times lightning dissipates and the second number of times the steepness and amplitude of the lightning wave are reduced. When the first or second count reaches the corresponding preset number, and the remaining service life information of the components contained in the pilot channel is higher than the first threshold, and the remaining service life information of the components contained in the lightning suppression channel is higher than the second threshold, the control unit sends a second notification instruction to the communication control unit every first predetermined time.

[0051] When the first or second count does not reach the corresponding preset number of times, and the remaining service life information of the components contained in the pilot channel is higher than the first threshold, and the remaining service life information of the components contained in the lightning suppression channel is higher than the second threshold, the control unit sends a third notification instruction to the communication control unit every second predetermined time.

[0052] The first specified time is less than the second specified time.

[0053] It should be noted that, in order to cope with different lightning frequencies and strike counts around the wind farm, it is necessary to promptly notify the corresponding maintenance terminals under different circumstances, such as the local control center, the maintenance terminals used by maintenance personnel, and remote control terminals. Therefore, in this embodiment, the communication control strategy set in the communication control unit refers to:

[0054] When the communication control unit receives the first notification instruction, it simultaneously sends maintenance instructions to the maintenance terminal, the local control center, and the remote control center within the communication range.

[0055] When the communication control unit receives the second notification instruction, it sends the maintenance instruction to the maintenance terminal and the local control center within the communication range, and forwards the maintenance instruction to the remote control center through the maintenance terminal or the local control center.

[0056] When the communication control unit receives a third notification instruction, it sends a maintenance instruction to the local control center and forwards the maintenance instruction to the maintenance terminal and remote control center within the communication range through the local control center.

[0057] Example 2

[0058] Based on Example 1, this example provides a lightning suppression and control method based on wind farms, the flowchart of which can be found here. Figure 3 The method includes the following steps:

[0059] S1. Lightning is dissipated using the leader channel in the lightning suppression unit, and the steepness and amplitude of the lightning wave are reduced using the lightning suppression channel in the lightning suppression unit.

[0060] S2. Monitor the remaining service life information of the components contained in the pilot channel through the first monitoring unit;

[0061] S3. Monitor the remaining service life information of the components contained in the lightning suppression channel through the second monitoring unit;

[0062] S4. Set a first threshold and a second threshold in the control unit, compare the remaining service life information of the components contained in the pilot channel with the first threshold, and compare the remaining service life information of the components contained in the lightning suppression channel with the second threshold. When the remaining service life information of the components contained in the pilot channel is lower than the first threshold and / or the remaining service life information of the components contained in the lightning suppression channel is lower than the second threshold, send a first notification instruction to the communication control unit.

[0063] S5. Set the communication control strategy in the communication control unit, and when receiving the first notification instruction from the control unit, send the maintenance instruction to the local control center or remote control center by selecting the corresponding control strategy.

[0064] As can be seen from the description of Embodiment 1, the application scenario and implementation principle of this embodiment are the same as those of Embodiment 1, so they will not be repeated here.

[0065] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A lightning suppression control system based on a wind farm, characterized in that, include: The lightning suppression unit includes a leader channel and a lightning suppression channel, which are used to dissipate lightning using the leader channel and to reduce the steepness and amplitude of the lightning wave using the lightning suppression channel. The first monitoring unit is used to monitor the remaining service life information of the components contained in the pilot channel; The second monitoring unit is used to monitor the remaining service life information of the components contained in the lightning suppression channel; The control unit is configured with a first threshold and a second threshold, which are used to compare the remaining service life information of the components contained in the pilot channel with the first threshold and compare the remaining service life information of the components contained in the lightning suppression channel with the second threshold. When the remaining service life information of the components contained in the pilot channel is lower than the first threshold and / or the remaining service life information of the components contained in the lightning suppression channel is lower than the second threshold, a first notification instruction is sent to the communication control unit. The communication control unit is equipped with a communication control strategy, which is used to send maintenance instructions to the local control center or remote control center by selecting the corresponding control strategy when the first notification instruction of the control unit is received. The control unit is equipped with a timer. The timer counts the first number of times lightning dissipates and the second number of times the steepness and amplitude of the lightning wave are reduced. When the first or second count reaches the corresponding preset number, and the remaining service life information of the components contained in the pilot channel is higher than the first threshold, and the remaining service life information of the components contained in the lightning suppression channel is higher than the second threshold, the control unit sends a second notification instruction to the communication control unit every first predetermined time. When the first or second count does not reach the corresponding preset number of times, and the remaining service life information of the components contained in the pilot channel is higher than the first threshold, and the remaining service life information of the components contained in the lightning suppression channel is higher than the second threshold, the control unit sends a third notification instruction to the communication control unit every second predetermined time. The first specified time is less than the second specified time.

2. The lightning suppression control system based on a wind farm according to claim 1, characterized in that, The lightning suppression unit is equipped with a standard lightning electric field strength threshold. When the real-time lightning electric field strength value is lower than the standard lightning strength threshold, the lightning suppression unit controls the use of the pilot channel to dissipate the lightning. When the real-time lightning electric field strength value is higher than the standard lightning strength threshold, the lightning suppression unit controls the use of the lightning suppression channel to reduce the steepness and amplitude of the lightning wave.

3. The lightning suppression control system based on a wind farm according to claim 1, characterized in that, The first threshold is greater than the second threshold.

4. The lightning suppression control system based on a wind farm according to claim 1, characterized in that, The pilot channel includes components including a first capacitor and a first inductor, and the lightning suppression channel includes an adjustable resistor and a second inductor. The remaining service life information of the components contained in the pilot channel refers to the average remaining service life of the first capacitor and the first inductor. The remaining service life information of the components contained in the lightning suppression channel refers to the remaining service life of the adjustable resistor and the second inductor.

5. The lightning suppression control system based on a wind farm according to claim 1, characterized in that, The communication control strategy set in the communication control unit refers to: When the communication control unit receives the first notification instruction, it simultaneously sends maintenance instructions to the maintenance terminal, the local control center, and the remote control center within the communication range. When the communication control unit receives the second notification instruction, it sends the maintenance instruction to the maintenance terminal and the local control center within the communication range, and forwards the maintenance instruction to the remote control center through the maintenance terminal or the local control center. When the communication control unit receives a third notification instruction, it sends a maintenance instruction to the local control center and forwards the maintenance instruction to the maintenance terminal and remote control center within the communication range through the local control center.

6. A lightning suppression control method based on a wind farm, applied to the lightning suppression control system based on a wind farm as described in any one of claims 1-5, characterized in that, Includes the following steps: Lightning is dissipated using the leader channel in the lightning suppression unit, and the steepness and amplitude of the lightning wave are reduced using the lightning suppression channel in the lightning suppression unit. The remaining service life information of the components contained in the pilot channel is monitored by the first monitoring unit; The remaining service life information of the components contained in the lightning suppression channel is monitored by the second monitoring unit; The control unit sets a first threshold and a second threshold, compares the remaining service life information of the components contained in the pilot channel with the first threshold, and compares the remaining service life information of the components contained in the lightning suppression channel with the second threshold. When the remaining service life information of the components contained in the pilot channel is lower than the first threshold and / or the remaining service life information of the components contained in the lightning suppression channel is lower than the second threshold, a first notification instruction is sent to the communication control unit. The communication control unit sets the communication control strategy, and when it receives the first notification instruction from the control unit, it sends the maintenance instruction to the local control center or remote control center by selecting the corresponding control strategy. The control unit is equipped with a timer. The timer counts the first number of times lightning dissipates and the second number of times the steepness and amplitude of the lightning wave are reduced. When the first or second count reaches the corresponding preset number, and the remaining service life information of the components contained in the pilot channel is higher than the first threshold, and the remaining service life information of the components contained in the lightning suppression channel is higher than the second threshold, the control unit sends a second notification instruction to the communication control unit every first predetermined time. When the first or second count does not reach the corresponding preset number of times, and the remaining service life information of the components contained in the pilot channel is higher than the first threshold, and the remaining service life information of the components contained in the lightning suppression channel is higher than the second threshold, the control unit sends a third notification instruction to the communication control unit every second predetermined time. The first specified time is less than the second specified time.

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