Lightning suppression system and lightning suppression method based on lightning cloud monitoring

Abstract

The present application belongs to the technical field of lightning protection, and proposes a lightning suppression system and method based on thundercloud monitoring. The main scheme is as follows: a standard lightning electric field intensity threshold is set by a thundercloud monitoring unit, the real-time lightning electric field intensity value is monitored, and the real-time lightning electric field intensity value is compared with the standard lightning electric field intensity threshold; the lightning suppression unit is adapted to the thundercloud monitoring unit, and the comparison result of the real-time lightning electric field intensity value and the standard lightning electric field intensity threshold is obtained; when the real-time lightning electric field intensity value is lower than the standard lightning electric field intensity threshold, the lightning suppression unit is controlled to have a capacitance characteristic, and is connected in series with a space capacitor to form a leader channel, so that the lightning is dissipated through the leader channel; when the real-time lightning electric field intensity value is higher than the standard lightning electric field intensity value, the lightning suppression unit is controlled to have a resistance characteristic, and forms a lightning suppression channel with the space capacitor, so that the steepness and amplitude of the lightning wave are reduced through the lightning suppression channel.

Description

Technical Field

[0001] This invention relates to the field of lightning protection technology, and in particular to a lightning suppression system and method based on lightning cloud monitoring. Background Technology

[0002] With the rapid development of the national economy and the continuous growth in demand for stable and reliable electricity, the safety of power production has become increasingly prominent. For transmission lines, lightning has always been a significant factor affecting the reliability of high-voltage transmission line power supply. my country's power grid suffers over 350,000 lightning strikes annually, with lightning-induced faults accounting for as much as 47.6%. Frequent lightning strikes can damage electrical equipment and even trigger major safety accidents, seriously threatening the safe operation of the power grid. Therefore, exploring the lightning response patterns of high-voltage transmission lines, studying the impact of lightning intrusion waves on power equipment, and developing new methods and technologies for lightning protection have become urgent needs to avoid or reduce lightning-related accidents on high-voltage transmission lines. Research on the application of new lightning protection technologies in high-voltage transmission lines has yielded good engineering application examples, providing reference and guidance for lightning protection engineering designers. Lightning strikes can cause significant damage to high-altitude wind turbines and overhead collector lines. The fact that wind turbines and collector lines are all located in open, high-altitude areas makes the equipment highly vulnerable to lightning strikes. Lightning strikes can cause line tripping, equipment damage, and substantial economic losses. With the application of wind turbines at high altitudes, increased capacity, and increased fuselage height, and the widespread adoption of microelectronic devices with extremely low overcurrent resistance and high operating efficiency in control systems, the severity of lightning damage to wind turbines will become increasingly prominent, and the resulting indirect economic losses will also increase.

[0003] Therefore, the negative impacts of lightning strikes under different operating conditions, especially in high-altitude wind farms, urgently need to be addressed. Furthermore, due to the complexity and variability of lightning processes, particularly in high-altitude mountain wind farm areas, these areas were mostly uninhabited before the construction of wind farm projects, resulting in extremely limited means of lightning suppression and protection. Summary of the Invention

[0004] The purpose of this invention is to provide a lightning suppression system and method based on thundercloud monitoring, which can monitor and effectively suppress lightning intrusion waves under different operating conditions, especially under the operating conditions of high-altitude wind farms, thereby significantly improving the lightning protection level of wind turbine units in wind farms and effectively reducing the occurrence of lightning damage accidents.

[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 system based on thundercloud monitoring, comprising:

[0007] The location acquisition unit is used to acquire location information of possible lightning strikes under different lightning suppression scenarios;

[0008] The lightning cloud monitoring unit is used to select the installation location based on the location information of possible lightning strikes under different lightning suppression scenarios. After installation, it is set to the always-on state and is equipped with a standard lightning electric field strength threshold to monitor the real-time lightning electric field strength value and compare the real-time lightning electric field strength value with the standard lightning electric field strength threshold.

[0009] The lightning suppression unit, adapted to the thundercloud monitoring unit, is used to obtain the comparison results of the real-time lightning electric field strength value and the standard lightning electric field strength threshold. When the real-time lightning electric field strength value is lower than the standard lightning electric field strength threshold, the lightning suppression unit is controlled to exhibit capacitive characteristics and form a pilot channel in series with the space capacitor to dissipate the lightning through the pilot channel. When the real-time lightning electric field strength value is higher than the standard lightning electric field strength value, the lightning suppression unit is controlled to exhibit resistive characteristics and form a lightning suppression channel with the space capacitor to reduce the steepness and amplitude of the lightning wave by passing the lightning suppression channel.

[0010] As a further optimization, the location acquisition unit acquires the location information of the lightning strike that has occurred, acquires the location distribution information of possible lightning strikes, and filters out the location information of possible lightning strikes based on the location distribution information of possible lightning strikes.

[0011] As a further optimization, the step of filtering out potential lightning strike location information based on the distribution information of possible lightning strike locations refers to:

[0012] Based on the location distribution information of potential lightning strikes, obtain the location information of power equipment that has been struck by lightning, as well as the location information of power equipment with a probability of being struck by lightning greater than 40%.

[0013] The top locations of electrical equipment that have already been struck by lightning, as well as the top locations of electrical equipment with a greater than 40% probability of being struck by lightning, are selected as potential lightning strike locations.

[0014] As a further optimization, the space capacitance is denoted as C1;

[0015] When the real-time electric field strength value of lightning is lower than the standard lightning electric field strength threshold, the lightning leader channel includes a space capacitor C1, a first capacitor C2 and an inductor L, and the lightning is guided to the ground and dissipated through the space capacitor C1, the first capacitor C2 and the inductor.

[0016] When the real-time electric field strength value of lightning is higher than the standard electric field strength value of lightning, the lightning suppression channel includes a space capacitor C1, an adjustable resistor R, and an inductor L. Lightning is conducted to the ground through the space capacitor C1, the adjustable resistor R, and the inductor L.

[0017] As a further optimization, the adjustable resistor R is made of zinc oxide element.

[0018] On the other hand, the present invention also provides a lightning suppression method based on thundercloud monitoring, applied to the aforementioned lightning suppression system based on thundercloud monitoring, comprising the following steps:

[0019] The location acquisition unit obtains location information of possible lightning strikes under different lightning suppression scenarios;

[0020] The lightning cloud monitoring unit selects the installation location based on the location information of possible lightning strikes under different lightning suppression scenarios. After installation, it is set to a constantly active state and a standard lightning electric field strength threshold is set to monitor the real-time lightning electric field strength value and compare the real-time lightning electric field strength value with the standard lightning electric field strength threshold.

[0021] The lightning suppression unit is adapted to the thundercloud monitoring unit, and the comparison results of the real-time lightning electric field strength value and the standard lightning electric field strength threshold are obtained.

[0022] When the real-time electric field strength value of lightning is lower than the standard lightning electric field strength threshold, the lightning suppression unit is controlled to exhibit capacitive characteristics and is connected in series with the space capacitor to form a pilot channel, which dissipates the lightning through the pilot channel.

[0023] When the real-time electric field strength value of lightning is higher than the standard electric field strength value of lightning, the lightning suppression unit is controlled to exhibit resistive characteristics and forms a lightning suppression channel with the space capacitor, thereby reducing the steepness and amplitude of the lightning wave by passing the lightning through the lightning suppression channel.

[0024] The beneficial effects of this invention are as follows: Through the aforementioned lightning suppression system and method based on thundercloud monitoring, firstly, the location acquisition unit obtains location information of possible lightning strikes under different lightning suppression scenarios. Then, the thundercloud monitoring unit selects the installation location based on the location information of possible lightning strikes under different lightning suppression scenarios. After installation, it is set to a constantly active state and a standard lightning electric field strength threshold is set. The real-time lightning electric field strength value is monitored, and the real-time lightning electric field strength value is compared with the standard lightning electric field strength threshold. Finally, the lightning... The suppression unit is adapted to the thundercloud monitoring unit and obtains the comparison results of the real-time electric field strength value of lightning with the standard lightning electric field strength threshold. When the real-time electric field strength value of lightning is lower than the standard lightning electric field strength threshold, the lightning suppression unit is controlled to exhibit capacitive characteristics and is connected in series with the space capacitor to form a pilot channel, which dissipates the lightning through the pilot channel. When the real-time electric field strength value of lightning is higher than the standard lightning electric field strength value, the lightning suppression unit is controlled to exhibit resistive characteristics and is connected with the space capacitor to form a lightning suppression channel, which reduces the steepness and amplitude of the lightning wave.

[0025] On the one hand, it can predict the location and time of lightning strikes with relatively high accuracy, avoiding the waste of hardware investment costs due to the installation of too many lightning suppression units. On the other hand, under different lightning electric field intensities, if the lightning electric field intensity is relatively low, the lightning can be directly introduced into the ground, and the pilot channel can be opened directly to dissipate the lightning. If the lightning electric field intensity is relatively high, the lightning cannot be directly introduced into the ground, and the lightning suppression channel can be opened to suppress high-voltage lightning, thereby reducing the steepness and amplitude of the lightning wave and reducing the damage to power equipment at the lightning strike location. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the composition structure of the lightning suppression system based on thundercloud monitoring in Embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the equivalent circuit in Embodiment 1 during a lightning strike;

[0028] Figure 3 This is a flowchart of the lightning suppression method based on thundercloud monitoring in Embodiment 2 of the present invention.

[0029] Where C1 represents the space capacitor, C2 represents the first capacitor, R represents the adjustable resistor, and L represents the inductor. Detailed Implementation

[0030] 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.

[0031] Example 1

[0032] This embodiment provides a lightning suppression system based on lightning cloud monitoring. See the schematic diagram of its structure below. Figure 1 The method includes:

[0033] The location acquisition unit is used to acquire location information of possible lightning strikes under different lightning suppression scenarios;

[0034] The lightning cloud monitoring unit is used to select the installation location based on the location information of possible lightning strikes under different lightning suppression scenarios. After installation, it is set to the always-on state and is equipped with a standard lightning electric field strength threshold to monitor the real-time lightning electric field strength value and compare the real-time lightning electric field strength value with the standard lightning electric field strength threshold.

[0035] The lightning suppression unit, adapted to the thundercloud monitoring unit, is used to obtain the comparison results of the real-time lightning electric field strength value and the standard lightning electric field strength threshold. When the real-time lightning electric field strength value is lower than the standard lightning electric field strength threshold, the lightning suppression unit is controlled to exhibit capacitive characteristics and form a pilot channel in series with the space capacitor to dissipate the lightning through the pilot channel. When the real-time lightning electric field strength value is higher than the standard lightning electric field strength value, the lightning suppression unit is controlled to exhibit resistive characteristics and form a lightning suppression channel with the space capacitor to reduce the steepness and amplitude of the lightning wave by passing the lightning suppression channel.

[0036] For different lightning strike scenarios, taking wind power equipment as an example, if lightning suppression units are installed on the top of each wind power unit, the installation density needs to be considered. If the installation density is too low, it will not effectively protect against lightning; if the installation density is too high, the hardware investment cost will be too high. Therefore, in this embodiment, in order to accurately deal with the damage of lightning strikes to power equipment and minimize hardware investment costs, it is necessary to know the specific location information of the lightning suppression units in advance. Therefore, in this embodiment, the location acquisition unit can obtain relatively accurate location information of lightning strikes that have occurred and location information of possible lightning strikes. Therefore, in this embodiment, the location acquisition unit obtains the location information of lightning strikes that have occurred and obtains the location distribution information of possible lightning strikes, and filters out the location information of possible lightning strikes based on the location distribution information of possible lightning strikes.

[0037] Here, the phrase "filtering out potential lightning strike locations based on the distribution information of possible lightning strike locations" specifically refers to:

[0038] Based on the location distribution information of potential lightning strikes, obtain the location information of power equipment that has been struck by lightning, as well as the location information of power equipment with a probability of being struck by lightning greater than 40%.

[0039] The top locations of electrical equipment that have already been struck by lightning, as well as the top locations of electrical equipment with a greater than 40% probability of being struck by lightning, are selected as potential lightning strike locations.

[0040] It should be noted that since thundercloud locations change with the weather and are difficult to fix, the real-time electric field strength of lightning emitted by different thunderclouds will also change. Therefore, for the two scenarios mentioned above where the leader channel and lightning suppression channel eliminate or reduce lightning damage, it is necessary to record the specific thundercloud location and the corresponding real-time electric field strength value of lightning in order to record the usage frequency of the lightning suppression unit and guide its subsequent maintenance. Therefore, in this embodiment, when the thundercloud monitoring unit monitors the real-time electric field strength value of lightning, it records the first thundercloud location information and the first real-time electric field strength value when the real-time electric field strength value is lower than the standard lightning electric field threshold, and stores them in the first storage list according to the recording time sequence. It also records the second thundercloud location information and the second real-time electric field strength value when the real-time electric field strength value is higher than the standard lightning intensity threshold, and stores them in the second storage list according to the recording time sequence.

[0041] Meanwhile, in order to provide installation guidance for lightning suppression units for other operating conditions, it is also necessary to realize real-time synchronization of lightning elimination or lightning suppression by the meteorological system. Therefore, in this embodiment, the first thundercloud location information and the first real-time electric field strength value of lightning in the first storage list, and the second thundercloud location information and the second real-time electric field strength value of lightning in the second storage list are included.

[0042] For specific applications, please refer to Figure 2 The equivalent circuit diagram during a lightning strike is shown below. The space capacitor can be represented as C1. When the real-time lightning electric field strength is lower than the standard lightning electric field strength threshold, the lightning leader channel includes the space capacitor C1, the first capacitor C2, and the inductor L. The lightning is dissipated into the ground through the space capacitor C1, the first capacitor C2, and the inductor. When the real-time lightning electric field strength is higher than the standard lightning electric field strength, the lightning suppression channel includes the space capacitor C1, the adjustable resistor R, and the inductor L. The lightning is dissipated into the ground through the space capacitor C1, the adjustable resistor R, and the inductor L.

[0043] As a preferred embodiment, the adjustable resistor R can be made of zinc oxide elements.

[0044] Example 2

[0045] Based on Example 1, this example provides a lightning suppression method based on thundercloud monitoring, the flowchart of which can be found here. Figure 3 The method includes the following steps:

[0046] S1. Obtain location information of possible lightning strikes under different lightning suppression scenarios through the location acquisition unit;

[0047] S2. The installation location is selected by the lightning cloud monitoring unit based on the location information of possible lightning strikes under different lightning suppression scenarios. After installation, it is set to the always-on state and a standard lightning electric field strength threshold is set. The real-time lightning electric field strength value is monitored and compared with the standard lightning electric field strength threshold.

[0048] S3. Adapt the lightning suppression unit to the thundercloud monitoring unit and obtain the comparison results between the real-time lightning electric field strength value and the standard lightning electric field strength threshold.

[0049] S4. When the real-time electric field strength value of lightning is lower than the standard lightning electric field strength threshold, the lightning suppression unit is controlled to exhibit capacitive characteristics and connected in series with the space capacitor to form a pilot channel, which dissipates the lightning through the pilot channel.

[0050] S5. When the real-time electric field strength value of lightning is higher than the standard electric field strength value of lightning, the lightning suppression unit is controlled to exhibit resistive characteristics and form a lightning suppression channel with the space capacitor. The lightning is then passed through the lightning suppression channel to reduce the steepness and amplitude of the lightning wave.

[0051] As can be seen from the description of Embodiment 1, the application conditions and implementation principles of this embodiment are the same as those of Embodiment 1, so they will not be repeated here.

[0052] 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 system based on thundercloud monitoring, characterized in that, include: The location acquisition unit is used to acquire location information of possible lightning strikes under different lightning suppression scenarios; The lightning cloud monitoring unit is used to select the installation location based on the location information of possible lightning strikes under different lightning suppression scenarios. After installation, it is set to the always-on state and is equipped with a standard lightning electric field strength threshold to monitor the real-time lightning electric field strength value and compare the real-time lightning electric field strength value with the standard lightning electric field strength threshold. A lightning suppression unit, adapted to a thundercloud monitoring unit, is used to obtain a comparison result between the real-time lightning electric field strength value and the standard lightning electric field strength threshold. When the real-time lightning electric field strength value is lower than the standard lightning electric field strength threshold, the lightning suppression unit is controlled to exhibit capacitive characteristics and connected in series with a space capacitor to form a lightning leader channel. The lightning leader channel includes a space capacitor C1, a first capacitor C2, and an inductor L. Lightning is conducted to the ground and dissipated through the space capacitor C1, the first capacitor C2, and the inductor. When the real-time lightning electric field strength value is higher than the standard lightning electric field strength value, the lightning suppression unit is controlled to exhibit resistive characteristics and forms a lightning suppression channel with the space capacitor. The lightning is conducted to the ground by reducing the steepness and amplitude of the lightning wave through the lightning suppression channel. The lightning suppression channel includes a space capacitor C1, an adjustable resistor R, and an inductor L. Lightning is conducted to the ground through the space capacitor C1, the adjustable resistor R, and the inductor L.

2. The lightning suppression system based on thundercloud monitoring according to claim 1, characterized in that, The location acquisition unit acquires the location information of the lightning strike that has occurred, and acquires the location distribution information of possible lightning strikes, and filters out the location information of possible lightning strikes based on the location distribution information of possible lightning strikes.

3. The lightning suppression system based on thundercloud monitoring according to claim 2, characterized in that, The process of filtering out potential lightning strike locations based on the distribution information of possible lightning strike locations refers to: Based on the location distribution information of potential lightning strikes, obtain the location information of power equipment that has been struck by lightning, as well as the location information of power equipment with a probability of being struck by lightning greater than 40%. The top locations of electrical equipment that have already been struck by lightning, as well as the top locations of electrical equipment with a greater than 40% probability of being struck by lightning, are selected as potential lightning strike locations.

4. The lightning suppression system based on thundercloud monitoring according to claim 1, characterized in that, The adjustable resistor R is made of zinc oxide element.

5. A lightning suppression method based on thundercloud monitoring, applied to the lightning suppression system based on thundercloud monitoring as described in any one of claims 1-4, characterized in that, Includes the following steps: The location acquisition unit obtains location information of possible lightning strikes under different lightning suppression scenarios; The lightning cloud monitoring unit selects the installation location based on the location information of possible lightning strikes under different lightning suppression scenarios. After installation, it is set to a constantly active state and a standard lightning electric field strength threshold is set to monitor the real-time lightning electric field strength value and compare the real-time lightning electric field strength value with the standard lightning electric field strength threshold. The lightning suppression unit is adapted to the thundercloud monitoring unit, and the comparison results of the real-time lightning electric field strength value and the standard lightning electric field strength threshold are obtained. When the real-time electric field strength value of lightning is lower than the standard lightning electric field strength threshold, the lightning suppression unit is controlled to exhibit capacitive characteristics and is connected in series with the space capacitor to form a lightning leader channel, which dissipates the lightning through the lightning leader channel. When the real-time electric field strength value of lightning is higher than the standard electric field strength value of lightning, the lightning suppression unit is controlled to exhibit resistive characteristics and forms a lightning suppression channel with the space capacitor, thereby reducing the steepness and amplitude of the lightning wave by passing the lightning through the lightning suppression channel.

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