A method for deploying drone decoy equipment for hierarchical substations

Abstract

The present invention discloses a method for arranging drone decoy equipment for hierarchical substations, which relates to the technical field of communication interference and anti-interference. The method establishes a physical model of the interference influence range of drone decoy equipment on substation timing equipment under different transmission powers and adjusts and verifies specific parameters in combination with experiments. Then, according to the area size of substations at different levels and the structural layout of each device in the substation, the specific arrangement position of the drone decoy equipment in substations at different levels is determined when the drone decoy equipment will not interfere with the substation timing equipment during operation. The present invention uses theoretical analysis and experimental verification to ensure that the drone decoy equipment will not interfere with the substation timing equipment during operation.

Description

Technical Field

[0001] The present invention relates to the technical field of communication interference and anti-interference, and in particular to a method for arranging drone deception equipment for hierarchical substations. Background Art

[0002] Substations are an important part of the power system. They directly affect the safety and economic operation of the entire power system. They are the intermediate link between power plants and users, and play the role of converting and distributing electric energy. The automation system monitors and measures the operation of all equipment in the substation. Drone decoy devices emit false signals in the GPS frequency band, which will affect the timing equipment of the automation system, causing time asynchrony, so that the automation system cannot perform measurement and monitoring normally, which will cause greater economic losses to the substation and even the entire power system. For example: the fault point of the transmission line cannot be calculated through traveling wave ranging. If it cannot be handled in time, the impact of the fault will be expanded, and more seriously, the power system will be paralyzed.

[0003] Currently, there is no patent that proposes different methods for the layout of drone decoy equipment for substations. Currently, only a drone navigation decoy system is proposed, which focuses on the functional structure of the decoy countermeasure system, and does not mention what aspects need to be paid attention to when installing and deploying drone decoy equipment; a radio counter-interference system used for substation drone security defense focuses on the suppression counter-interference system used in substations, and the transmission power is much greater than the 10mW set by the national standard, which is no longer suitable for substations at this stage. Therefore, the current patents cannot provide effective help for the problems faced by substations.

[0004] According to national standards, drone decoy equipment must be installed in important substations. However, substations currently do not have drone decoy equipment because they cannot guarantee that the timing equipment inside the substations and the navigation of cars on the roads around the substations will not be affected. Currently, there are no patents or documents proposing different methods for deploying drone decoy equipment for substations. In addition, the sizes of substations at different levels vary greatly. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a method for analyzing the layout of drone decoy equipment for substations at different levels. Through theoretical analysis and experimental verification, the drone decoy equipment will not interfere with the substation timing equipment during operation.

[0006] To achieve the above object, the present invention can adopt the following technical solutions:

[0007] A method for deploying drone deception equipment for hierarchical substations, comprising:

[0008] A physical model of the interference impact range of drone decoy devices on substation timing equipment under different transmission powers is established, and specific parameters are adjusted and verified in combination with experiments. Then, according to the area size of substations at different levels and the structural layout of various equipment in the substation, the specific layout positions of drone decoy devices in substations at different levels are determined when the drone decoy devices will not interfere with the substation timing equipment during operation, which specifically includes the following steps:

[0009] Step 1: Investigate and summarize the area size of substations at different levels and the structural layout of each equipment in the substation, and the different levels include 110kV, 220kV, and 500kV;

[0010] Step 2: Theoretically analyze and calculate the interference impact range of the drone decoy device on the substation timing equipment under different transmission powers, wherein the different transmission powers include 5mW and 10mW;

[0011] Step 3: Experimental verification summarizes the interference impact range of drone decoy devices on substation timing equipment under different transmission powers;

[0012] Step 4: Based on the above conclusions, drone decoy equipment is reasonably deployed in substations at different levels.

[0013] The above-mentioned method for arranging drone deception equipment for hierarchical substations, further, the physical model is specifically:

[0014]

[0015] Where, P2 is the power intensity of the detection point at different distances, in dBm; P1 is the transmission power of the drone decoy device, in mW; λ is the GPS carrier wavelength; R is the distance between the drone decoy device and the antenna of the substation timing equipment.

[0016] As described above, the method for arranging drone decoy equipment for hierarchical substations, further, the substation timing equipment includes a time synchronizer and a time synchronization device that are sequentially signal-connected, the time synchronization device is provided with a deception interference detection module, the deception interference detection module is electrically connected to GPS and BDS antennas, and the drone decoy equipment applies GPS deception signals to the GPS and BDS antennas at a set horizontal distance.

[0017] The above-mentioned method for arranging drone decoy equipment for hierarchical substations, further, the specific parameters are adjusted and verified in combination with experiments, including:

[0018] In order to measure and verify the impact distance of the GPS spoofing signal emitted by the drone decoy device on the substation timing equipment, field measurements of the time synchronization device were carried out at different target distances; in order to detect the number of satellites received and the timing accuracy of the time synchronization device under the interference of the GPS signal of the drone decoy device, the drone decoy device was used to apply GPS spoofing signal interference to the GPS and BDS antennas of the time synchronization device through the omnidirectional antenna.

[0019] The above-mentioned method for arranging drone decoy equipment for hierarchical substations, further, the specific parameters are adjusted and verified in combination with experiments, including:

[0020] The drone decoy device is set to different transmission powers and different distances. The impact of the drone decoy device on the time synchronization device is determined by observing the number of satellites received by the time synchronization device, the one pulse time accuracy of the transistor-transistor logic interface of the time synchronization device obtained by the time synchronizer, and the optical fiber interface remote interval instrument group-B code time accuracy.

[0021] As described above, the method for arranging drone decoy equipment for hierarchical substations, further, the antenna used by the drone decoy equipment is a horn antenna, and the horn antenna mouth faces upward, and at the same time, the signal gain of the horn antenna transmitting the signal facing the ground is weak, and the signal gain of the horn antenna transmitting the signal facing the low altitude is strong, so that the drone decoy equipment has less impact on the electromagnetic interference on the ground, but has a greater impact on the electromagnetic interference of drones at low altitudes.

[0022] The method for deploying drone decoy devices for hierarchical substations as described above can further determine whether the drone decoy devices will interfere with the substation timing equipment during operation by judging the spatial electromagnetic intensity distribution of the GPS decoy signals emitted by the drone decoy devices, the number of receiving satellites of the substation timing equipment, and the timing accuracy of the timing equipment.

[0023] As described above, the method for deploying drone decoy equipment for hierarchical substations further, when the power strength of the deceptive signal at the GPS antenna is higher than -60dBm, the GPS module of the time synchronization device is deceivingly interfered by the drone decoy equipment and loses step; when the power strength of the deceiving signal at the BDS antenna is higher than -40dBm, the performance of the BDS receiver is interfered, the number of captured BDS satellites is less than 4, and the BDS module of the time synchronization device loses step.

[0024] As described above, the method for arranging drone decoy devices for hierarchical substations can further, for 110kV substations, place the drone decoy devices in the middle area of ​​the substation, 30-40m away from the drone decoy devices, and adjust the transmission power of the drone decoy devices to 3.38-4.67mW, so that the signal strength of the drone decoy devices at the antenna of the time synchronization device is lower than -60.5dBm.

[0025] As described above, the method for arranging drone decoy devices for hierarchical substations can further, for 220kV substations, place the drone decoy devices in the middle area of ​​the substation, 110-130m away from the drone decoy devices, and adjust the transmission power of the drone decoy devices to 10mW, so that the signal strength of the drone decoy devices at the antenna of the time synchronization device is lower than -60.5dBm.

[0026] As described above, the method for arranging drone decoy devices for hierarchical substations can be further applied to 500kV substations by placing drone decoy devices in the area around the substation, with the distance between them not exceeding 1km, and the distance between them and the antenna of the time synchronization device exceeding 750m. The transmission power of the drone decoy devices can be adjusted to 10mW, so that the signal strength of the drone decoy devices at the antenna of the time synchronization device is lower than -60.5dBm.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The method proposed in the present invention responds to national policies in a timely manner and provides a reference for installing and starting drone decoy equipment in substations.

[0029] 2. The present invention takes into account that the drone decoy device will affect the GPS receiving signal of the roads around the substation. Therefore, the transmitting antenna of the drone decoy device is a horn antenna with the mouth facing upward. The signal gain of its transmitting signal facing the ground is weak, and the signal gain of its transmitting signal facing the low altitude is strong, so that the drone decoy device has less impact on the electromagnetic interference on the ground, but has a greater impact on the electromagnetic interference of drones at low altitudes.

[0030] 3. The present invention determines whether the drone decoy device will affect the substation timing equipment by judging the spatial electromagnetic intensity distribution of the GPS decoy signal emitted by the drone decoy device, the number of receiving satellites of the timing equipment, and the timing accuracy of the timing equipment, thereby ensuring the reliability of the experimental conclusion.

[0031] 4. The present invention obtains the degree of influence of drone decoy equipment on substation timing equipment through theoretical analysis and calculation and experimental verification comparison and summary, and then proposes a method for arranging drone decoy equipment to ensure that substation timing equipment is not affected, which is accurate and effective.

[0032] 5. The present invention obtains the optimal layout method of using different drone decoy devices in substations of different levels (110kV, 220kV, 500kV) through theoretical analysis, calculation and experimental verification. It is more targeted and effective, filling the current domestic blank areas, solving the problems that urgently need to be solved in current substations, and providing a guarantee for the safe and stable operation of substations. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A schematic diagram of the structure of the horn antenna of the drone decoy device used in an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of interference environment setting and timing accuracy detection according to an embodiment of the present invention;

[0036] Figure 3 This is a layout diagram of a drone decoy device in a 110kV substation according to an embodiment of the present invention;

[0037] Figure 4 This is a layout diagram of a drone decoy device in a 220kV substation according to an embodiment of the present invention;

[0038] Figure 5 This is a layout diagram of the drone decoy equipment in a 500kV substation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] Example:

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations of the embodiments of the present invention are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise clearly defined. In addition, unless otherwise clearly defined and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The word “exemplary” is used hereinafter to mean “serving as an example, example, or illustration.” Any embodiment described as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0044] According to national standards, drone decoy equipment needs to be installed and deployed in important substations. However, the current substations cannot guarantee that the timing equipment inside the substation and the navigation of cars on the roads around the substation will not be affected, so drone decoy equipment is not turned on. The present invention responds to national policies in a timely manner. Through theoretical analysis and experimental verification, a method for analyzing the layout of drone decoy equipment for substations at different levels is proposed, so that the drone decoy equipment will not interfere with the substation timing equipment during operation, providing a reference for substations to install and turn on drone decoy equipment.

[0045] See also Figures 1 to 5 , a method for deploying drone deception equipment for hierarchical substations, comprising:

[0046] A physical model of the interference impact range of drone decoy devices on substation timing equipment under different transmission powers is established, and specific parameters are adjusted and verified in combination with experiments. Then, according to the area size of substations at different levels and the structural layout of various equipment in the substation, the specific layout positions of drone decoy devices in substations at different levels are determined when the drone decoy devices will not interfere with the substation timing equipment during operation, which specifically includes the following steps:

[0047] Step 1: Investigate and summarize the area size of substations at different levels and the structural layout of each equipment in the substation, the different levels include 110kV, 220kV, and 500kV;

[0048] Step 2: Theoretically analyze and calculate the interference impact range of the drone decoy device on the substation timing equipment under different transmission powers, wherein the different transmission powers include 5mW and 10mW;

[0049] Step 3: Experimental verification summarizes the interference impact range of drone decoy devices on substation timing equipment under different transmission powers;

[0050] Step 4: Based on the above conclusions, reasonably arrange drone decoy equipment in substations at different levels.

[0051] The above-mentioned method for arranging drone deception equipment for hierarchical substations, further, the physical model is specifically:

[0052]

[0053] Where, P2 is the power intensity of the detection point at different distances, in dBm; P1 is the transmission power of the drone decoy device, in mW; λ is the GPS carrier wavelength; R is the distance between the drone decoy device and the antenna of the substation timing equipment.

[0054] As described above, the method for arranging drone decoy equipment for hierarchical substations, further, the substation timing equipment includes a time synchronizer and a time synchronization device that are sequentially signal-connected, the time synchronization device is provided with a deception interference detection module, the deception interference detection module is electrically connected to GPS and BDS antennas, and the drone decoy equipment applies GPS deception signals to the GPS and BDS antennas at a set horizontal distance.

[0055] The above-mentioned method for arranging drone decoy equipment for hierarchical substations, further, the specific parameters are adjusted and verified in combination with experiments, including:

[0056] In order to measure and verify the impact distance of the GPS spoofing signal emitted by the drone decoy device on the substation timing equipment, field measurements of the time synchronization device were carried out at different target distances; in order to detect the number of satellites received and the timing accuracy of the time synchronization device under the interference of the GPS signal of the drone decoy device, the drone decoy device was used to apply GPS spoofing signal interference to the GPS and BDS antennas of the time synchronization device through the omnidirectional antenna.

[0057] The above-mentioned method for arranging drone decoy equipment for hierarchical substations, further, the specific parameters are adjusted and verified in combination with experiments, including:

[0058] The drone decoy device is set to different transmission powers and different distances. The impact of the drone decoy device on the time synchronization device is determined by observing the number of satellites received by the time synchronization device, the one pulse time accuracy of the transistor-transistor logic interface of the time synchronization device obtained by the time synchronizer, and the optical fiber interface remote interval instrument group-B code time accuracy.

[0059] As described above, the method for arranging drone decoy equipment for hierarchical substations, further, the antenna used by the drone decoy equipment is a horn antenna, and the horn antenna mouth faces upward, and at the same time, the signal gain of the horn antenna transmitting the signal facing the ground is weak, and the signal gain of the horn antenna transmitting the signal facing the low altitude is strong, so that the drone decoy equipment has less impact on the electromagnetic interference on the ground, but has a greater impact on the electromagnetic interference of drones at low altitudes.

[0060] The method for deploying drone decoy devices for hierarchical substations as described above can further determine whether the drone decoy devices will interfere with the substation timing equipment during operation by judging the spatial electromagnetic intensity distribution of the GPS decoy signals emitted by the drone decoy devices, the number of receiving satellites of the substation timing equipment, and the timing accuracy of the timing equipment.

[0061] As described above, the method for deploying drone decoy equipment for hierarchical substations further, when the power strength of the deceptive signal at the GPS antenna is higher than -60dBm, the GPS module of the time synchronization device is deceivingly interfered by the drone decoy equipment and loses step; when the power strength of the deceiving signal at the BDS antenna is higher than -40dBm, the performance of the BDS receiver is interfered, the number of captured BDS satellites is less than 4, and the BDS module of the time synchronization device loses step.

[0062] As described above, the method for arranging drone decoy devices for hierarchical substations can further, for 110kV substations, place the drone decoy devices in the middle area of ​​the substation, 30-40m away from the drone decoy devices, and adjust the transmission power of the drone decoy devices to 3.38-4.67mW, so that the signal strength of the drone decoy devices at the antenna of the time synchronization device is lower than -60.5dBm.

[0063] As described above, the method for arranging drone decoy devices for hierarchical substations can further, for 220kV substations, place the drone decoy devices in the middle area of ​​the substation, 110-130m away from the drone decoy devices, and adjust the transmission power of the drone decoy devices to 10mW, so that the signal strength of the drone decoy devices at the antenna of the time synchronization device is lower than -60.5dBm.

[0064] As described above, the method for arranging drone decoy devices for hierarchical substations can be further applied to 500kV substations by placing drone decoy devices in the area around the substation, with the distance between them not exceeding 1km, and the distance between them and the antenna of the time synchronization device exceeding 750m. The transmission power of the drone decoy devices can be adjusted to 10mW, so that the signal strength of the drone decoy devices at the antenna of the time synchronization device is lower than -60.5dBm.

[0065] See also Figures 1 to 5 ,A method for analyzing the layout of drone decoy devices for substations at different levels may include the following steps:

[0066] Step 1: Research and summarize the size and structural layout of substations at different levels (110kV, 220kV, 500kV).

[0067] Step 2: Theoretically analyze and calculate the interference impact range of drone decoy devices on substation timing equipment under different transmission powers (5mW, 10mW).

[0068] Step 3: Experimental verification summarizes the scope of interference impact of drone decoy devices on substation timing equipment under different transmission powers.

[0069] Step 4: Based on the above conclusions, drone decoy equipment is reasonably deployed in substations at different levels.

[0070] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0071] like Figure 1 , Figure 1The schematic diagram of the structure of the horn antenna of the drone decoy device used in the embodiment of the present invention is shown, that is, a drone decoy device with a horn antenna. The influence range of the drone decoy device is not less than 500m, and the influence of the GPS spoofing signal of the drone decoy device on the ground GPS navigation system is effectively reduced, and the influence on the mid-air drone GPS navigation system is increased. Considering that the drone decoy device will affect the GPS receiving signal of the road around the substation, it can be seen from the figure that the drone decoy device includes a drone decoy device host and a horn antenna set on a fixed pole, and the horn antenna mouth faces upward. At the same time, the signal gain of the horn antenna transmitting signal facing the ground is weak, and the signal gain of the horn antenna transmitting signal facing the low altitude is strong, so that the drone decoy device has less electromagnetic interference on the ground, but has a greater electromagnetic interference effect on low-altitude drones.

[0072] Furthermore, in order to estimate the impact distance of the GPS spoofing signal emitted by the drone decoy device on the substation timing equipment, the signal power intensity calculation formula (1) at different distances from the target can be expressed as:

[0073]

[0074] Where P2 is the power intensity of the detection point at different distances, in dBm; P1 is the transmission power of the drone decoy device, in mW; λ is the GPS carrier wavelength; R is the distance between the drone decoy device and the timing device antenna. And formula (1) shows that the drone decoy device also affects the substation timing equipment at 50m.

[0075] Furthermore, in order to measure and verify the impact distance of the GPS spoofing signal emitted by the drone decoy device on the substation timing equipment, field measurements were conducted on the time synchronization device at different distances from the target. In order to detect the number of satellites received and the timing accuracy of the time synchronization device under the interference of the GPS signal of the drone decoy device, the drone decoy device was used to apply GPS spoofing signal interference to the GPS and BDS antennas of the time synchronization device through the omnidirectional antenna. Figure 2As shown in the figure, different transmission powers (5mW, 10mW) and different distances (60m, 50m, 35m, 30m, 25m, 20m, 15m, 10m, 7m, 5m, 3m, 1m) of the drone decoy device are set. The influence of the drone decoy device on the time synchronization device is judged by observing the number of satellites of the time synchronization device and the PPS time accuracy of the TTL interface of the time synchronization device and the IRIG-B code time accuracy of the optical fiber interface obtained by the time synchronizer. The results show that when the power intensity of the deceptive signal at the GPS antenna is higher than -60±0.50dBm, the GPS module of the time synchronization device is deceivingly interfered by the drone decoy device and loses synchronization. When the power intensity of the deceiving signal at the BDS antenna is higher than -40±1.85dBm, the performance of the BDS receiver is interfered, the number of captured BDS satellites is less than 4, and the BDS module of the time synchronization device loses synchronization. In order to minimize the influence of the drone decoy device on the time synchronization device, the signal strength of the drone decoy device at the antenna of the time synchronization device should be lower than -60.5dBm. The present invention determines whether the drone decoy device will affect the substation timing equipment by judging the spatial electromagnetic intensity distribution of the GPS decoy signal emitted by the drone decoy device, the number of receiving satellites of the timing equipment and the timing accuracy of the timing equipment, thereby ensuring the reliability of the experimental conclusion.

[0076] Further, such as Figure 3 As shown, for a small 110kV substation, the drone decoy device can be placed in the middle area of ​​the substation, 30-40m away from the drone decoy device. In order to make the drone decoy device signal strength at the time synchronization device antenna lower than -60.5dBm, the drone decoy device transmission power should be adjusted to 3.38-4.67mW.

[0077] Further, such as Figure 4 As shown in the figure, for a medium-sized 220kV substation, the drone decoy device can be placed in the middle area of ​​the substation, 110-130m away from the drone decoy device. From formula (1), it can be seen that when the drone decoy device uses the maximum transmission power of 10mW and is 60m away from the drone decoy device, the signal strength of the drone decoy device is lower than -60.5dBm, so the transmission power of the drone decoy device should be adjusted to 10mW.

[0078] Further, such as Figure 5 As shown, for large 500kV substations, drone decoy devices can be placed in the surrounding areas of the substation, with a distance of no more than 1km between them, and the distance between them and the time synchronization device antenna is more than 750m. Therefore, the transmission power of the drone decoy device should be adjusted to 10mW. This will not affect the normal operation of the substation timing equipment, and can cover the countermeasure range to the entire substation.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0080] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable ordinary technicians in the field to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made based on the essence of the content of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for deploying drone decoy equipment for hierarchical substations, characterized in that: include: A physical model of the interference impact range of drone decoy devices on substation timing equipment under different transmission powers is established, and specific parameters are adjusted and verified in combination with experiments. Then, according to the area size of substations at different levels and the structural layout of various equipment in the substation, the specific layout positions of drone decoy devices in substations at different levels are determined when the drone decoy devices will not interfere with the substation timing equipment during operation, which specifically includes the following steps: Step 1: Investigate and summarize the area size of substations at different levels and the structural layout of each equipment in the substation, and the different levels include 110kV, 220kV, and 500kV; Step 2: Theoretically analyze and calculate the interference impact range of the drone decoy device on the substation timing equipment under different transmission powers, wherein the different transmission powers include 5mW and 10mW; Step 3: Experimental verification summarizes the interference impact range of drone decoy devices on substation timing equipment under different transmission powers; Step 4: Based on the above conclusions, drone decoy equipment is reasonably deployed in substations at different levels.

2. The method for deploying drone decoy equipment for hierarchical substations according to claim 1 is characterized in that: The physical model is specifically: Where, P2 is the power intensity of the detection point at different distances, in dBm; P1 is the transmission power of the drone decoy device, in mW; λ is the GPS carrier wavelength; R is the distance between the drone decoy device and the antenna of the substation timing equipment.

3. The method for deploying drone decoy equipment for hierarchical substations according to claim 1 is characterized in that: The substation timing equipment includes a time synchronizer and a time synchronization device which are connected in sequence by signals. The time synchronization device is provided with a deception interference detection module which is electrically connected to GPS and BDS antennas. The drone deception device applies GPS deception signals to the GPS and BDS antennas at a set horizontal distance.

4. The method for deploying drone decoy equipment for hierarchical substations according to claim 3 is characterized in that: The combined experiment adjusts and verifies specific parameters, including: In order to measure and verify the impact distance of the GPS spoofing signal emitted by the drone decoy device on the substation timing equipment, field measurements of the time synchronization device were carried out at different target distances; in order to detect the number of satellites received and the timing accuracy of the time synchronization device under the interference of the GPS signal of the drone decoy device, the drone decoy device was used to apply GPS spoofing signal interference to the GPS and BDS antennas of the time synchronization device through the omnidirectional antenna.

5. The method for deploying drone decoy equipment for hierarchical substations according to claim 4 is characterized in that: The combined experiment adjusts and verifies specific parameters, including: The drone decoy device is set to different transmission powers and different distances. The impact of the drone decoy device on the time synchronization device is determined by observing the number of satellites received by the time synchronization device, the one pulse time accuracy of the transistor-transistor logic interface of the time synchronization device obtained by the time synchronizer, and the optical fiber interface remote interval instrument group-B code time accuracy.

6. The method for deploying drone decoy equipment for hierarchical substations according to claim 1 is characterized in that: The antenna used by the drone decoy device is a horn antenna, and the mouth of the horn antenna faces upward. At the same time, the signal gain of the horn antenna transmitting the signal facing the ground is weak, and the signal gain of the horn antenna transmitting the signal facing the low altitude is strong, which makes the drone decoy device have less impact on the electromagnetic interference on the ground, but has a greater impact on the electromagnetic interference of low-altitude drones.

7. The method for deploying drone decoy equipment for hierarchical substations according to claim 3 is characterized in that: By judging the spatial electromagnetic intensity distribution of the GPS deception signal emitted by the drone decoy device, the number of receiving satellites of the substation timing equipment, and the timing accuracy of the timing equipment, it is possible to determine whether the drone decoy device will interfere with the substation timing equipment during operation.

8. The method for deploying drone decoy equipment for hierarchical substations according to claim 3 is characterized in that: When the spoofing signal power strength at the GPS antenna is higher than -60dBm, the GPS module of the time synchronization device is deceivingly interfered by the drone decoy device and loses synchronization; when the spoofing signal power strength at the BDS antenna is higher than -40dBm, the BDS receiver performance is interfered with, the number of captured BDS satellites is less than 4, and the BDS module of the time synchronization device loses synchronization.

9. The method for deploying drone decoy equipment for hierarchical substations according to claim 3 is characterized in that: For 110kV substations, the drone decoy device is placed in the middle area of ​​the substation, 30-40m away from the drone decoy device, and the transmission power of the drone decoy device is adjusted to 3.38-4.67mW so that the signal strength of the drone decoy device at the antenna of the time synchronization device is lower than -60.5dBm.

10. The method for deploying drone decoy equipment for hierarchical substations according to claim 3 is characterized in that: For 220kV substations, the drone decoy device is placed in the middle area of ​​the substation, 110-130m away from the drone decoy device, and the transmission power of the drone decoy device is adjusted to 10mW, so that the signal strength of the drone decoy device at the antenna of the time synchronization device is lower than -60.5dBm; For 500kV substations, drone decoy devices are placed in the area around the substation, with a distance of no more than 1km between them, and the distance between them and the antenna of the time synchronization device is more than 750m. The transmission power of the drone decoy device is adjusted to 10mW so that the signal strength of the drone decoy device at the antenna of the time synchronization device is lower than -60.5dBm.

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