Lightning suppression control system and method based on wind power plant

Abstract

The invention belongs to the field of lightning suppression control, and provides a lightning suppression control system and method based on a wind power plant, and the main scheme is that a first threshold value and a second threshold value are set in a control unit, and the remaining service life information of components contained in a pilot channel is compared with the first threshold value; when the remaining service life information of the components contained in the pilot channel is lower than the first threshold value and / or the remaining service life information of the components contained in the thunder and lightning suppression channel is lower than the second threshold value, the thunder and lightning suppression channel carries out thunder and lightning suppression on the components contained in the pilot channel. Sending a first notification instruction to a communication control unit; a communication control strategy is set in the communication control unit, and when a first notification instruction of the control unit is received, a maintenance instruction is sent to a local control center or a remote control center by selecting a corresponding control strategy. According to the invention, all components used in the lightning suppression process can be accurately monitored, and related personnel can be timely notified to carry out maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning suppression control, and particularly to a lightning suppression control system and method based on a wind farm. Background Art

[0002] At present, after a lightning suppression device is installed on the high-voltage cable of a wind farm, when lightning strikes occur, if the internal circuit absorbs lightning or electrical components are broken down by lightning and need to be reinstalled, the results generated by the lightning suppression device due to lightning strikes need to be transmitted to the local control center and remote control center of the wind farm. Generally, the staffing of wind farms is relatively small, and many staff members need to be more involved in equipment inspection and maintenance of fan-related equipment. Although the local control center of the wind farm can perform certain data monitoring functions, however, since most of the areas where wind farms are located have relatively poor signals, it causes the staff to be unable to know in time the rapid response when the lightning suppression device fails, unable to replace and repair in time. On the premise that the staff themselves are relatively few in number, adding additional inspection and maintenance work to the staff may affect the production capacity of the entire wind farm.

[0003] At the same time, currently when using a lightning suppression device to suppress lightning, an integrated status monitoring device is usually used. Lightning suppression can not only suppress lightning when lightning strikes occur, but also form an air capacitor between the air and the lightning suppression device when there are thunderclouds near the wind farm. The air capacitor itself will also store a certain amount of charge, and the lightning suppression device also needs to eliminate these charges to reduce the lightning strike risk. Therefore, the integrated status monitoring device obviously cannot meet the monitoring requirements of the lightning suppression device. Summary of the Invention

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

[0005] To solve the technical problems of the present invention, the technical solution adopted is: On the one hand, the present invention provides a lightning suppression control system based on a wind farm, including: A lightning suppression unit, including a pilot channel and a lightning suppression channel, for dissipating lightning using the pilot channel and reducing the steepness and amplitude of lightning waves using the lightning suppression channel; A first monitoring unit, for monitoring the remaining service life information of the components contained in the pilot channel; A second monitoring unit, for monitoring the remaining service life information of the components contained in the lightning suppression channel; The control unit is set with a first threshold and a second threshold, and is 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 set with a communication control strategy, and is used to send a maintenance instruction to the local control center or the remote control center by selecting a corresponding control strategy when receiving the first notification instruction from the control unit.

[0006] As a further optimization, a standard lightning electric field intensity threshold is set in the lightning suppression unit. When the real-time lightning electric field intensity value is lower than the marked lightning intensity threshold, the lightning suppression unit controls the use of the pilot channel to dissipate lightning. When the real-time lightning electric field intensity value is higher than the marked lightning intensity threshold, the lightning suppression unit controls the use of the lightning suppression channel to reduce the steepness and amplitude of the lightning wave.

[0007] As a further optimization, the first threshold is greater than the second threshold.

[0008] As a further optimization, the components contained in the pilot channel include 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.

[0009] As a further optimization, a timer is set in the control unit. The timer counts the first number of times of lightning dissipation and the second number of times of reducing the steepness and amplitude of the lightning wave. When the first number of times or the second number of times reaches 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 second notification instruction to the communication control unit every first specified time; When the first number of times or the second number of times 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 specified time; The first specified time is less than the second specified time.

[0010] As a further optimization, 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 terminals, local control center, and remote control center within the communication range; When the communication control unit receives the second notification instruction, it sends maintenance instructions to the maintenance terminals and local control center within the communication range, and forwards the maintenance instructions to the remote control center through the maintenance terminal or local control center; When the communication control unit receives the third notification instruction, it sends maintenance instructions to the local control center, and forwards the maintenance instructions to the maintenance terminals and remote control center within the communication range through the local control center.

[0011] On the other hand, the present invention provides a lightning suppression control method based on a wind farm, which is applied to the lightning suppression control system based on the wind farm, and includes the following steps: Use the leader channel in the lightning suppression unit to dissipate lightning, and use the lightning suppression channel in the lightning suppression unit to reduce the steepness and amplitude of the lightning wave; Monitor the remaining service life information of the components contained in the leader channel through the first monitoring unit; Monitor the remaining service life information of the components contained in the lightning suppression channel through the second monitoring unit; Set a first threshold and a second threshold in the control unit, compare the remaining service life information of the components contained in the leader 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 leader 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; Set a communication control strategy in the communication control unit, and when receiving the first notification instruction from the control unit, send maintenance instructions to the local control center or remote control center by selecting the corresponding control strategy.

[0012] The beneficial effects of the present invention are as follows: For the two possible lightning risk situations in a wind farm, the present invention respectively sets corresponding monitoring units for the leader channel and the lightning suppression channel in the lightning suppression unit to accurately monitor the safe use of all components. In addition, the present invention also sets a communication control strategy. Under different situations of the lightning suppression unit, different communication control strategies can be selected to send information to the remote control center or the local control center to maintain whether the lightning suppression device needs to be replaced after a lightning strike and the lightning absorption situation, so as to ensure that there are intact lightning suppression devices at positions on the high-voltage cables of the wind farm where lightning is likely to occur, thereby avoiding direct lightning damage to the cables and not increasing the extra workload of the staff, reducing the notification time when the device fails, and minimizing the impact on the wind farm as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It 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; Figure 2 It is an equivalent circuit schematic diagram of the leader channel and the lightning suppression channel when there is lightning in the air in Embodiment 1 of the present invention; Figure 3 It is a flowchart of the lightning suppression control method based on a wind farm in Embodiment 2 of the present invention.

[0014] Among them, C represents the first capacitor, R represents the adjustable resistor, and L represents the same inductor multiplexed by the first inductor and the second inductor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0016] Embodiment 1

[0017] What this embodiment provides is a lightning suppression control system based on a wind farm. The schematic diagram of its composition structure is shown in Figure 1 , among which, the system includes: A lightning suppression unit, including a leader channel and a lightning suppression channel, for dissipating lightning using the leader channel and reducing the steepness and amplitude of lightning waves using the lightning suppression channel; A first monitoring unit, for monitoring the remaining service life information of the components included in the leader channel; A second monitoring unit, for monitoring the remaining service life information of the components included in the lightning suppression channel; A control unit, which is set with a first threshold and a second threshold, is 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; A communication control unit, which is set with a communication control strategy, is used to send a maintenance instruction to the local control center or the remote control center by selecting the corresponding control strategy when receiving the first notification instruction from the control unit.

[0018] Since the lightning suppression unit in this embodiment can respond to the risk situation when lightning does not occur, that is, it can dissipate lightning through the pilot channel, and can also respond to the risk situation when lightning occurs, that is, it can reduce the steepness and intensity of the lightning wave through the lightning suppression channel, thereby reducing the safety hazards of various electrical equipment in the wind farm. Therefore, it is necessary to monitor the above two situations separately. Therefore, it is necessary to set a standard lightning electric field intensity threshold, and compare the real-time lightning electric field intensity with it to determine whether to introduce lightning into the pilot channel or the lightning suppression channel. Therefore, in this embodiment, a standard lightning electric field intensity threshold is set in the lightning suppression unit. When the real-time lightning electric field intensity value is lower than the marked lightning intensity threshold, the lightning suppression unit controls the use of the pilot channel to dissipate lightning. When the real-time lightning electric field intensity value is higher than the marked lightning intensity threshold, the lightning suppression unit controls the use of the lightning suppression channel to reduce the steepness and amplitude of the lightning wave.

[0019] It should be noted that when dissipating lightning through the pilot channel, the lightning voltage at this time will be relatively lower than the lightning voltage during a lightning strike. Even if lightning is dissipated through the pilot channel, it will not cause the breakdown of each electrical component in the pilot channel. Therefore, the allowable number of times for each component in the pilot channel to dissipate lightning is relatively more than that for lightning breakdown. That is to say, when reducing the steepness and amplitude of the lightning wave through the lightning suppression channel, due to the relatively high instantaneous lightning voltage during a lightning strike, the possibility of the electrical components used in the lightning suppression channel being broken down is higher. Therefore, it is necessary to satisfy that the first threshold is greater than the second threshold.

[0020] In the actual application process, the threshold voltage corresponding to the second threshold can be 20 kv, that is, when there is space charge around the lightning suppression unit to form a space voltage, if the range of the space voltage is 0 - 20 kv, then at this time, the lightning is ablated through the pilot channel; the threshold voltage corresponding to the first threshold can be 30 kv, that is, when there is space charge around the lightning suppression unit to form a space voltage, if the space voltage reaches 30 kv, then at this time, the steepness and amplitude of the lightning wave are reduced through the lightning suppression channel. Here, both the first threshold and the second threshold can be adjusted and set according to actual needs, not limited to the above specific voltage values.

[0021] See Figure 2 The equivalent circuit schematic diagram of the pilot channel and the lightning suppression channel in the air when there is lightning. In this embodiment, the pilot channel has a capacitive characteristic, and the lightning can be eliminated by charging and then discharging the air charge using a capacitive component, while the lightning suppression channel has a high-resistance characteristic to cope with the instantaneous high voltage during a lightning strike. Therefore, in this embodiment, the components included in the pilot channel are a first capacitor C and a first inductor, and the lightning suppression channel includes a variable resistor R and a second inductor; The remaining service life information of the components included 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 included in the lightning suppression channel refers to the remaining service life of the variable resistor R and the second inductor.

[0022] In the actual application process, since the first inductor and the second inductor are not damaged greatly when using the pilot channel to dissipate lightning and using the lightning suppression channel to reduce the steepness and amplitude of the lightning wave, and there are relatively low safety hazards even for subsequent maintenance, therefore, they can be reused as the same inductor L.

[0023] Generally speaking, after the lightning suppression unit is installed and put into use in a wind farm, if there is no lightning or the number of lightning occurrences is small, at this time, since each electrical component in the lightning suppression channel can have a long remaining service life, only normal component monitoring is required. However, if the frequency of lightning occurrences is high, then both the number of times the pilot channel dissipates lightning and the number of times the steepness and amplitude of the lightning wave are reduced through the lightning suppression channel are accurately counted, so as to timely notify the local control center of the wind farm and the operation and maintenance terminals within the communication range for subsequent maintenance.

[0024] Therefore, in this embodiment, a timer is provided in the control unit to count the first number of lightning dissipations and the second number of times to reduce the steepness and amplitude of lightning waves. When the first number or the second number 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 specified time; When the first number or the second number does not reach 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 third notification instruction to the communication control unit every second specified time; The first specified time is less than the second specified time.

[0025] It should be noted that in order to cope with different situations of the lightning frequency and the number of lightning strikes around the wind farm, it is necessary to notify the corresponding maintenance ends in a timely manner under different circumstances, such as the local control center, the maintenance terminals used by maintenance personnel, and the remote control terminals, etc. Therefore, in this embodiment, the communication control strategy set in the communication control unit refers to: When the communication control unit receives the first notification instruction, it sends maintenance instructions to the maintenance terminals, the local control center, and the remote control center within the communication range at the same time; When the communication control unit receives the second notification instruction, it sends maintenance instructions to the maintenance terminals and the local control center within the communication range, and forwards the maintenance instructions to the remote control center through the maintenance terminal or the local control center; When the communication control unit receives the third notification instruction, it sends maintenance instructions to the local control center, and forwards the maintenance instructions to the maintenance terminals and the remote control center within the communication range through the local control center.

[0026] Embodiment 2

[0027] Based on Embodiment 1, this embodiment provides a lightning suppression control method for a wind farm, and its flowchart is shown in Figure 3 wherein, the method includes the following steps: S1. Use the pilot channel in the lightning suppression unit to dissipate lightning, and use the lightning suppression channel in the lightning suppression unit to reduce the steepness and amplitude of lightning waves; S2. Monitor the remaining service life information of the components contained in the pilot channel through the first monitoring unit; S3. Monitor the remaining service life information of the components contained in the lightning suppression channel through the second monitoring unit; S4. Set a first threshold and a second threshold in the control unit, compare the remaining service life information of the components included in the pilot channel with the first threshold, and compare the remaining service life information of the components included in the lightning suppression channel with the second threshold. When the remaining service life information of the components included in the pilot channel is lower than the first threshold and / or the remaining service life information of the components included in the lightning suppression channel is lower than the second threshold, send a first notification instruction to the communication control unit; S5. Set a communication control strategy in the communication control unit, and when receiving the first notification instruction from the control unit, send a maintenance instruction to the local control center or the remote control center by selecting the corresponding control strategy.

[0028] 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 elaborated here.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A lightning suppression control system based on a wind farm, characterized in that: include: A lightning suppression unit, including a pilot channel and a lightning suppression channel, for dissipating lightning using the pilot channel and reducing the steepness and amplitude of lightning waves using the lightning suppression channel; A first monitoring unit, used to monitor the remaining service life information of the components contained in the pilot channel; A second monitoring unit is used to monitor the remaining service life information of the components contained in the lightning suppression channel; A control unit is provided with a first threshold and a second threshold, and is used to compare the remaining service life information of the components contained in the pilot channel with the first threshold, and to compare the remaining service life information of the components contained in the lightning suppression channel with the second threshold, and 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 provided with a communication control strategy, which is used to send a maintenance instruction to a local control center or a remote control center by selecting a corresponding control strategy when receiving a first notification instruction from the control unit.

2. The wind farm-based lightning suppression control system according to claim 1 is characterized in that: A standard lightning electric field strength threshold is set in the lightning suppression unit. When the real-time electric field strength value of lightning is lower than the marked lightning strength threshold, the lightning suppression unit controls the use of the pilot channel to dissipate the lightning. When the real-time electric field strength value of lightning is higher than the marked 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 wind farm-based lightning suppression control system according to claim 1 is characterized in that: The first threshold is greater than the second threshold.

4. The wind farm-based lightning suppression control system according to claim 1 is characterized in that: The components contained in the pilot channel include 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 wind farm-based lightning suppression control system according to claim 1, characterized in that: The control unit is provided with a timer, and the timer is used to count the first number of times the lightning is dissipated and the second number of times the steepness and amplitude of the lightning wave are reduced. When the first number or the second number 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 specified time; When the first number or the second number does not reach 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 third notification instruction to the communication control unit every second specified time; The first prescribed time is shorter than the second prescribed time.

6. The wind farm-based lightning suppression control system according to claim 5, 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 the maintenance instruction 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 the third notification instruction, it sends a maintenance instruction to the local control center, and forwards the maintenance instruction to the maintenance terminal and the remote control center within the communication range through the local control center.

7. A wind farm-based lightning suppression control method, applied to a wind farm-based lightning suppression control system according to any one of claims 1 to 6, characterized in that: The steps include: The pilot channel in the lightning suppression unit is used to dissipate lightning, and the lightning suppression channel in the lightning suppression unit is used to reduce the steepness and amplitude of the lightning wave; Monitoring the remaining service life information of the components contained in the pilot channel by the first monitoring unit; Monitoring the remaining service life information of the components contained in the lightning suppression channel by the second monitoring unit; A first threshold and a second threshold are set in the control unit, and 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, and 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; A communication control strategy is set in the communication control unit, and upon receiving a first notification instruction of the control unit, a maintenance instruction is sent to a local control center or a remote control center by selecting a corresponding control strategy.

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