Electromagnetic interference evaluation method, device and computer equipment for to-be-built wind farm

Abstract

The application relates to an electromagnetic interference evaluation method and device for a to-be-built wind farm and a computer device. The method comprises the following steps: obtaining radiation signal frequencies of wind turbines in a running wind farm by measuring radiation signal field strengths of the running wind farm and background signal field strengths of the to-be-built wind farm at multiple test points in a test frequency band; determining equivalent radiation powers of a single wind turbine at each radiation signal frequency in the running wind farm according to the radiation signal frequencies of the wind turbines and the measured radiation signal field strengths; and simulating an electromagnetic wave propagation process of external radiation signals of each wind turbine in the to-be-built wind farm based on the radiation signal frequencies of the wind turbines, an electromagnetic wave propagation model of the external radiation signals of the wind turbines in the to-be-built wind farm and the equivalent radiation powers of the single wind turbine at each radiation signal frequency, so as to obtain electromagnetic interference evaluation results of the to-be-built wind farm. The method can realize electromagnetic interference evaluation before construction of the wind farm.

Description

Technical Field

[0001] This application relates to the field of wind power planning simulation technology, and in particular to a method, apparatus and computer equipment for assessing electromagnetic interference in a wind farm to be built. Background Technology

[0002] While wind power generation is developing rapidly, it has also brought some negative impacts. For example, during the operation of wind farms, wind turbines and substations may generate electromagnetic radiation. If the frequency of these electromagnetic waves is similar to that of frequency-using equipment (such as radar, communication equipment, etc.), it may cause electromagnetic interference.

[0003] As the number of wind turbines increases, eliminating or mitigating adverse effects after wind farms are built will be extremely costly. Therefore, there is an urgent need for a method to assess electromagnetic interference from wind farms under construction, in order to prevent electromagnetic interference from these farms to frequency-using equipment at the source. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, apparatus, and computer equipment for assessing electromagnetic interference in wind farms under construction, which can achieve electromagnetic interference assessment before the construction of wind farms, in response to the above-mentioned technical problems.

[0005] Firstly, this application provides a method for assessing electromagnetic interference in a wind farm under construction, including:

[0006] By measuring the radiated signal field strength at multiple test points in the operating wind farm within the test frequency band and the background signal field strength of the wind farm to be built, the radiated signal frequency of the wind turbine in the operating wind farm is obtained; the deviation between the site conditions and equipment conditions of the operating wind farm and the wind farm to be built is less than the preset deviation.

[0007] Based on the frequency of the wind turbine's radiation signal and the measured field strength of the radiation signal, determine the equivalent radiation power of a single wind turbine in an operational wind farm at each radiation signal frequency;

[0008] Based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency, the electromagnetic wave propagation process of the external radiation signal of each wind turbine in the wind farm to be built is simulated, and the electromagnetic interference assessment results of the wind farm to be built are obtained.

[0009] In one embodiment, based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency, the electromagnetic wave propagation process of the external radiation signal of each wind turbine in the wind farm to be built is simulated to obtain the electromagnetic interference assessment results of the wind farm to be built, including:

[0010] Based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency, the electromagnetic wave propagation process of the external radiation signal of each wind turbine in the wind farm to be built is simulated to determine the predicted radiation signal field strength of the wind farm to be built at at least one frequency-using equipment location.

[0011] Based on the comparison between the predicted radiated signal field strength at any frequency-using equipment location and the corresponding interference field strength limit, the electromagnetic interference assessment result of the wind farm to be built is determined.

[0012] In one embodiment, based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency, the electromagnetic wave propagation process of the external radiation signal of each wind turbine in the wind farm to be built is simulated to determine the predicted radiation signal field strength of the wind farm to be built at at least one frequency-using equipment location, including:

[0013] In the simulation model, the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, the equivalent radiation power of a single wind turbine at each radiation signal frequency, and the simulation conditions are set.

[0014] Based on the established simulation model, the electromagnetic wave propagation process of all wind turbines in the wind farm to be built is simulated to determine the predicted radiation signal field strength at at least one frequency-using equipment location in the wind farm to be built.

[0015] In one embodiment, the simulation model includes setting the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the wind turbine's external radiation signal in the wind farm to be built, the equivalent radiated power of a single wind turbine at each radiation signal frequency, and simulation conditions, including:

[0016] The spatial location and erection elevation information of multiple wind turbines and frequency-using equipment in the wind farm to be built are imported into the simulation model, and the radiation signal frequency of the wind turbine and the equivalent radiation power of a single wind turbine at each radiation signal frequency are set in the simulation model.

[0017] Add the site conditions and radio wave propagation model corresponding to the wind farm to be built to the simulation model to obtain the completed simulation model.

[0018] In one embodiment, the electromagnetic interference assessment result of the wind farm to be built is determined based on the comparison between the predicted radiated signal field strength at any frequency-using equipment location and the corresponding interference field strength limit, including:

[0019] If the predicted radiated signal field strength at any location of the frequency-using equipment is less than the corresponding interference field strength limit, it is determined that the wind farm to be built does not interfere with the frequency-using equipment; if the predicted radiated signal field strength at any location of the frequency-using equipment is greater than or equal to the corresponding interference field strength limit, it is determined that the wind farm to be built interferes with the frequency-using equipment.

[0020] The interference situation of each frequency-using equipment in the wind farm to be built will be used as the electromagnetic interference assessment result of the wind farm to be built.

[0021] In one embodiment, the multiple test points include a first test point set under any one of the wind turbines in an operating wind farm, a second test point centered on the first test point, and a third test point, wherein the distance between the third test point and the center is greater than the distance between the second test point and the center;

[0022] By measuring the radiated signal field strength at multiple test points in the operational wind farm within the test frequency band and the background signal field strength of the wind farm to be built, the radiated signal frequencies of wind turbines in the operational wind farm are obtained, including:

[0023] The measured radiated signal field strength at the first test point within the test frequency band is compared with the background signal field strength to obtain a first comparison result; and the measured radiated signal field strength at the second test point and the third test point within the test frequency band is compared to obtain a second comparison result.

[0024] Based on the first comparison result and the second comparison result, the initial radiated signal frequency of the wind turbines in the operating wind farm is determined from the test frequency band;

[0025] By filtering out known communication signal frequencies from the initial radiation signal frequencies, the radiation signal frequencies of wind turbines in the operating wind farms are obtained.

[0026] In one embodiment, the equivalent radiated power of a single wind turbine in an operational wind farm at each radiated signal frequency is determined based on the wind turbine's radiated signal frequency and the measured radiated signal field strength, including:

[0027] The spatial locations of multiple wind turbines in the operating wind farm, the location information of the test points, the site conditions corresponding to the operating wind farm, and the electromagnetic wave propagation model of the wind turbine's external radiation signal are all imported into the simulation model. The initial radiation signal power of a single wind turbine in the operating wind farm at each radiation signal frequency is set to zero.

[0028] Based on the established simulation model, the electromagnetic wave propagation process of the external radiation signals of multiple wind turbines in an operational wind farm is simulated to determine the equivalent radiation power of a single wind turbine in an operational wind farm at each radiation signal frequency.

[0029] In one embodiment, the electromagnetic wave propagation process of the radiated signals from multiple wind turbines in the operating wind farm is simulated based on a completed simulation model to determine the equivalent radiated power of a single wind turbine in the operating wind farm at each radiated signal frequency, including:

[0030] Based on the established simulation model, the electromagnetic wave propagation process of the external radiation signals of multiple wind turbines in the operating wind farm is simulated to obtain the initial field strength simulation value of any test point at each radiation signal frequency.

[0031] Based on the difference between the initial field strength simulation value and the measured radiation signal field strength at the test point, the initial radiation signal power is adjusted, and the simulation continues based on the adjusted initial radiation signal power until the difference between the field strength simulation value at the test point and the corresponding measured radiation signal field strength is less than a preset threshold, thus obtaining the equivalent radiation power of a single wind turbine in the operating wind farm at each radiation signal frequency.

[0032] Secondly, this application also provides an electromagnetic interference assessment device for a wind farm under construction, comprising:

[0033] The acquisition module is used to acquire the radiation signal frequency of wind turbines in the operating wind farm by measuring the radiation signal field strength at multiple test points in the operating wind farm within the test frequency band and the background signal field strength of the wind farm to be built; the deviation between the site conditions and equipment conditions of the operating wind farm and the wind farm to be built is less than the preset deviation.

[0034] The determination module is used to determine the equivalent radiated power of a single wind turbine in an operating wind farm at each radiated signal frequency, based on the radiated signal frequency and the measured radiated signal field strength.

[0035] The simulation module is used to simulate the electromagnetic interference assessment results of the wind farm by simulating the electromagnetic wave propagation process of each wind turbine in the wind farm based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency.

[0036] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement any embodiment of the electromagnetic interference assessment method for the wind farm to be built in the first aspect described above.

[0037] Fourthly, this application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements any embodiment of the electromagnetic interference assessment method for the wind farm to be built in the first aspect described above.

[0038] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements any embodiment of the electromagnetic interference assessment method for the wind farm to be built in the first aspect described above.

[0039] The aforementioned electromagnetic interference assessment method, apparatus, and computer equipment for wind farms under construction obtain the radiation signal frequency of wind turbines in the existing wind farm by measuring the radiated signal field strength at multiple test points in the existing wind farm within the test frequency band and the background signal field strength of the wind farm under construction. The deviation between the site conditions and equipment conditions of the existing wind farm and the wind farm under construction is less than the preset deviation. Based on the radiation signal frequency and measured radiated signal field strength of the wind turbines, the equivalent radiated power of a single wind turbine in the existing wind farm at each radiated signal frequency is determined. Based on the radiated signal frequency of the wind turbines, the electromagnetic wave propagation model of the external radiated signal of the wind turbines in the wind farm under construction, and the equivalent radiated power of a single wind turbine at each radiated signal frequency, the electromagnetic wave propagation process of the external radiated signal of each wind turbine in the wind farm under construction is simulated to obtain the electromagnetic interference assessment results of the wind farm under construction. Before assessing the electromagnetic interference (EMI) of the wind farm under construction, this method first selects an existing wind farm near the proposed wind farm for data collection, obtaining the measured radiated signal field strength at multiple test points within the test frequency band. Then, by reverse calculation, the equivalent radiated power of a single wind turbine at each radiated signal frequency is determined. Based on the radiated signal frequency, equivalent radiated power, and the electromagnetic wave propagation model of the radiated signals from the wind turbines in the proposed wind farm, the method can accurately simulate the operation of each wind turbine in the proposed wind farm. The electromagnetic interference assessment results of the proposed wind farm can be accurately obtained based on the electromagnetic wave propagation simulation process of each wind turbine. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is an application environment diagram of an electromagnetic interference assessment method for a wind farm to be built, as shown in one embodiment.

[0042] Figure 2 This is a schematic diagram of the structure of an electromagnetic spectrum testing system in one embodiment;

[0043] Figure 3 This is a schematic diagram of the first process of an electromagnetic interference assessment method for a wind farm to be built in one embodiment;

[0044] Figure 4This is a schematic diagram of multiple test points in an operational wind farm in one embodiment;

[0045] Figure 5 This is a schematic diagram of the structure of an operational wind farm in one embodiment;

[0046] Figure 6 This is a schematic diagram of the second process of an electromagnetic interference assessment method for a wind farm to be built in one embodiment;

[0047] Figure 7 This is a schematic diagram of the third process of an electromagnetic interference assessment method for a wind farm to be built in one embodiment;

[0048] Figure 8 This is a schematic diagram of the fourth step of the electromagnetic interference assessment method for a wind farm to be built in one embodiment;

[0049] Figure 9 This is a schematic diagram of the fifth step of the electromagnetic interference assessment method for a wind farm to be built in one embodiment;

[0050] Figure 10 This is a schematic diagram of the sixth step of the electromagnetic interference assessment method for a wind farm to be built in one embodiment;

[0051] Figure 11 This is a schematic diagram of the seventh step of the electromagnetic interference assessment method for a wind farm to be built in one embodiment.

[0052] Figure 12 This is a schematic diagram of the eighth step of the electromagnetic interference assessment method for a wind farm to be built in one embodiment.

[0053] Figure 13 This is a flowchart illustrating the process of obtaining equivalent radiated power in one embodiment;

[0054] Figure 14 This is a schematic diagram of the ninth step in the electromagnetic interference assessment method for a wind farm to be built, as shown in one embodiment.

[0055] Figure 15 This is a structural block diagram of an electromagnetic interference assessment device for a wind farm to be built in one embodiment.

[0056] Figure 16 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0058] Before providing a detailed introduction to the technical solution of this application, let me first briefly introduce the technical background of this application.

[0059] Wind power, as a clean and sustainable energy source, is gradually becoming a key technology in the global energy transition. However, its rapid development has also brought some negative impacts. For example, during operation, wind turbines and substations may generate electromagnetic noise. If the frequency of the radiated electromagnetic waves is close to that of surrounding frequency-using equipment (e.g., radar, communication equipment), it may cause electromagnetic interference. This interference can increase the noise level of background signals on surrounding frequency-using equipment, reducing the signal-to-noise ratio and thus decreasing the sensitivity and signal recognition capability of the equipment. If the intensity of the radiated signal from the wind farm is sufficiently high, it may also affect the signal transmission quality of nearby communication equipment, leading to communication interruptions or data transmission errors.

[0060] As the number of wind turbines increases, eliminating or mitigating adverse effects after a wind farm is built will be extremely costly. Therefore, electromagnetic impact assessments (EMIAs) must be conducted before a wind farm receives construction permits. Due to the complex internal structure of wind turbines, the causes of electromagnetic noise are difficult to determine, making theoretical calculations challenging. Furthermore, since EMIAs are conducted during the planning and construction phase of a wind farm, before the turbines are actually installed, it is impossible to conduct on-site measurements of the electromagnetic noise signals generated by the wind farm under construction.

[0061] Based on this, this application proposes an electromagnetic interference assessment method for wind farms under construction. This method can obtain the equivalent radiated power of a single wind turbine in an existing wind farm similar to the wind farm under construction, and predict the electromagnetic interference assessment results of the wind farm under construction based on the equivalent radiated power of a single wind turbine. This method is applicable to both marine and terrestrial (plains, mountains, hills, etc.) scenarios. The technical solution of this application will be described in detail below.

[0062] The electromagnetic interference assessment method for wind farms under construction provided in this application can be applied to, for example... Figure 1The application environment shown includes a radiation signal spectrum testing device 101 and a computer device 102, which can communicate wirelessly or via a wired connection. The radiation signal spectrum testing device 101 is used to collect measured radiation signal field strength within a test frequency band at multiple test points in an operational wind farm and transmits the collected measured radiation signal field strength within the test frequency band to the computer device 102. The computer device 102 is used to determine the radiation signal frequency of the wind turbines in the operational wind farm based on the measured radiation signal field strength at multiple test points within the test frequency band. Then, based on the wind turbine's radiation signal frequency and the measured radiation signal field strength, it determines the equivalent radiation power of a single wind turbine in the operational wind farm at each radiation signal frequency. Based on the wind turbine's radiation signal frequency, the electromagnetic wave propagation model of the external radiation signal of the wind turbines in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency, it simulates the electromagnetic wave propagation process of the external radiation signal of each wind turbine in the wind farm to be built, obtaining the electromagnetic interference assessment results of the wind farm to be built. The intensity of the radiation signal can be characterized by radiation power or radiation signal field strength.

[0063] It should be noted that the measured radiated signal field strength at multiple test points in an operational wind farm within the test frequency band can be acquired using either a non-frequency-selective radiation testing method or a frequency-selective method. For the non-frequency-selective radiation testing method, the radiation signal spectrum testing equipment 101 is a field strength meter. It is easy to operate and can quickly measure the electromagnetic radiation signal level of the surrounding environment. However, the test results are generally a superposition of radiated signal levels across a wide frequency band, making it difficult to test the transmission levels of signals at different frequencies.

[0064] For the frequency-selective method, the radiated signal spectrum testing equipment 101 is an electromagnetic spectrum testing system consisting of a receiving antenna and a spectrum analyzer / electromagnetic interference (EMI) receiver. This system includes a multi-band electromagnetic field receiving antenna, an electromagnetic environment testing system controller, a host computer, RF cables, and a spectrum analyzer or EMI receiver. Figure 2 This is a schematic diagram of the electromagnetic spectrum testing system. The test antenna is connected in sequence to the attenuator / amplifier and the electromagnetic environment testing system controller via RF cables. The electromagnetic environment testing system controller is then connected to the spectrum analyzer / EMI receiver via RF cables. The host computer interacts with the electromagnetic environment testing system controller and the spectrum analyzer / EMI receiver through a communication link, thereby controlling the entire set of test hardware and acquiring radiated signals.

[0065] In one exemplary embodiment, such as Figure 3 As shown, an electromagnetic interference assessment method for a wind farm under construction is provided, which is then applied to... Figure 1 Taking a computer device as an example, the explanation includes the following steps S101 to S103. Wherein:

[0066] S101, by measuring the radiated signal field strength at multiple test points in the operating wind farm within the test frequency band and the background signal field strength of the wind farm to be built, the radiated signal frequency of the wind turbine in the operating wind farm is obtained; the deviation between the site conditions and equipment conditions of the operating wind farm and the wind farm to be built is less than the preset deviation.

[0067] Site conditions refer to the geographical location and topography of the wind farm, while equipment conditions refer to the wind turbine structure, dimensions, installed capacity of a single turbine, and the model and power of the converter in the nacelle. When selecting an existing wind farm, it is necessary to choose one that is already in operation and has similar installed capacity, topography, turbine model, tower height, blade material, and length to the wind farm to be built.

[0068] Figure 4 This diagram illustrates multiple test points in an operational wind farm. The operational wind farm includes N wind turbines, designated F1, F2, ..., FN. Each turbine has the same model, power capacity, material, dimensions, and other parameters. Taking an operational wind farm with three test points as an example, test point 1 is a proximity test point. This point is selected based on the surrounding road conditions and operational status of the operational wind farm, and is located close to a specific wind turbine within the operational wind farm (e.g., ...). Figure 4 The nearest location to the F5 wind turbine is designated as test point 1. According to the principle of signal propagation, the closer to the source, the smaller the signal attenuation. By testing the electromagnetic radiation signal level at the nearest point, the maximum radiation intensity emitted by the wind turbine at that point can be obtained.

[0069] Test point 2 is a mid-range signal fading test point. With test point 1 as the center, a location about 3-5 kilometers away from the center is selected as test point 2. The intensity of the radiated signal collected by test point 2 can be used to preliminarily determine the degree of influence of the radiated signal transmission loss in free space.

[0070] Test point 3 is a long-distance signal fading test point. Test points 1 and 2 are connected by a straight line, and the location about 10-50 kilometers away from test point 1 is designated as test point 3. The radiation intensity collected by test point 3 can be used to further determine the degree of influence of the radiation signal transmission loss in free space.

[0071] It should be noted that there are at least three test points in the wind farms that are already in operation.

[0072] In this embodiment of the application, after selecting an operating wind farm, the computer equipment can send a field strength acquisition command to the radiation signal spectrum testing equipment. After receiving the field strength acquisition command, the radiation signal spectrum testing equipment collects signals from multiple test points of the operating wind farm within the test frequency band and sends the measured radiation signal field strength within the test frequency band to the computer equipment.

[0073] Alternatively, the radiation signal spectrum testing equipment can collect measured radiation signal field strengths at multiple test points within the test frequency band of an operating wind farm at preset time intervals, and store each collected measured radiation signal field strength in a database. A computer can retrieve the latest stored measured radiation signal field strength within the test frequency band from the database and use this latest stored measured radiation signal field strength as the measured radiation signal field strength at multiple test points within the test frequency band of the operating wind farm. This application embodiment does not limit the method of obtaining the measured radiation signal field strength within the test frequency band.

[0074] It should also be noted that the radiation signal spectrum test process is as follows: (1) After determining the test point location of the operating wind farm, the test antenna can be selected from biconical antennas, log-periodic antennas, horn antennas, etc., depending on the test frequency band. According to the type of test antenna used, the electromagnetic spectrum test system structure diagram is used ( Figure 2 (1) Connect the test equipment and set the antenna height to be at least 1.5 meters above the ground. (2) Power on the electromagnetic spectrum test system and turn on the equipment to preheat for 10 minutes to make the test equipment work in a stable state. (3) Start the test software and set the parameters such as test frequency range, resolution bandwidth, detection method and scanning method. If the signal to be tested is a pulse signal, the peak or quasi-peak detection method should be used; if the signal to be tested is a continuous wave, the root mean square or average value detection method should be used. (4) After the test parameters are configured, start the test and complete the acquisition of electromagnetic radiation signal spectrum data of the wind farm in operation to obtain the measured radiation signal field strength of multiple test points in the test frequency band. It is understandable that multiple sets of tests can be carried out in different time periods and under different weather conditions as backup data.

[0075] Regarding the background signal strength, since the wind farm under construction has not yet been built, i.e., no wind turbines are operating, the background signal noise test location of the wind farm under construction can be selected as test point 4, which is not shown in the figure. The computer equipment can send a background signal acquisition command to the radiation signal spectrum testing equipment. After receiving the background signal acquisition command, the radiation signal spectrum testing equipment can acquire the background signal strength of the wind farm under construction at test point 4 and send the acquired background signal strength of the wind farm under construction to the computer equipment.

[0076] Based on this, the computer equipment can input the measured radiated signal field strength and background signal field strength of multiple test points within the test frequency band into the frequency determination model. Through analysis by the frequency determination model, the radiated signal frequency of the wind turbines in the operating wind farm can be determined from the test frequency band. Alternatively, the computer equipment can compare and analyze the measured radiated signal field strength and background signal field strength of multiple test points within the test frequency band, and use the test frequency corresponding to the data that conforms to the radio wave propagation characteristics as the radiated signal frequency of the wind turbines in the operating wind farm. This application does not limit the method for obtaining the radiated signal frequency of the wind turbines in the operating wind farm.

[0077] S102, based on the frequency of the wind turbine's radiation signal and the measured field strength of the radiation signal, determine the equivalent radiation power of a single wind turbine in an operational wind farm at each radiation signal frequency.

[0078] In this embodiment of the application, since there are multiple wind turbines in the operating wind farm, the electromagnetic waves radiated by each wind turbine will propagate in space. Therefore, for any test point, the measured radiation signal field strength corresponding to the test point is the superposition field strength of the radiation from multiple wind turbines. Figure 5 This is a schematic diagram of an operational wind farm. The dot in the middle represents any test point. For this test point, the measured radiation signal field strength at each radiation signal frequency is the total field strength obtained by superimposing the radiation signal field strengths of n wind turbines.

[0079] Based on this, for any given radiation signal frequency, the computer equipment can use the equivalent radiated power of a single wind turbine at that frequency as the variable to be optimized. The objective function is constructed using the mean square error between the measured and predicted radiation signal field strengths at all test points at that frequency. Using the range of radiated power values ​​as constraints, the equivalent radiated power of a single wind turbine in an operational wind farm at that frequency is found through iterative optimization.

[0080] Alternatively, the computer equipment can establish the electromagnetic wave propagation equation between the equivalent radiated power of each wind turbine and the measured radiated signal field strength based on the measured radiated signal field strength collected at multiple test points at each radiated signal frequency. This establishes an overdetermined set of equations using multiple test points. The least squares method is then used to minimize the residual between the measured and predicted radiated signal field strengths, and the equivalent radiated power of a single wind turbine in the operating wind farm at each radiated signal frequency is obtained through iterative solution.

[0081] S103, based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency, simulates the electromagnetic wave propagation process of the external radiation signal of each wind turbine in the wind farm to be built, and obtains the electromagnetic interference assessment results of the wind farm to be built.

[0082] Among them, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built can include the land electromagnetic wave propagation model and the ocean electromagnetic wave propagation model.

[0083] In this embodiment, the computer equipment can select an appropriate electromagnetic wave propagation model based on the environment of the wind farm to be built. Then, the radiation signal frequency of the wind turbines, the electromagnetic wave propagation model of the external radiation signals of the wind turbines in the wind farm to be built, and the equivalent radiated power of a single wind turbine at each radiation signal frequency are imported into the simulation model. The simulation model simulates the operation process of each wind turbine in the wind farm to be built, simulates the electromagnetic wave propagation process of the external radiation signals of each wind turbine, determines the electromagnetic noise impact range and non-impact range of the wind farm to be built, and uses the electromagnetic noise impact range and non-impact range as the electromagnetic interference assessment result of the wind farm to be built. Alternatively, the predicted radiation signal field strength at each frequency-using equipment location in the wind farm to be built can be calculated based on the simulation results. Based on the magnitude of the predicted radiation signal field strength, it can be determined whether the wind farm to be built interferes with the location of each frequency-using equipment, and the judgment result is used as the electromagnetic interference assessment result of the wind farm to be built.

[0084] Alternatively, computer equipment can simulate multiple propagation paths of electromagnetic waves in the wind farm, including direct radiation, ground reflection, and diffraction by mountains, based on a propagation model of the electromagnetic waves radiated by wind turbines in the wind farm to be built. Then, using the equivalent radiated power of a single wind turbine at each radiated signal frequency as the radiation source parameter, the superposition result of the field strength at the location of the frequency-using equipment along all propagation paths is statistically analyzed, and this superposition result is used as the predicted radiated signal field strength at the frequency-using equipment location of the wind farm to be built. Based on the magnitude of the predicted radiated signal field strength, it is determined whether the wind farm to be built interferes with the locations of each frequency-using equipment, and the determination result is used as the electromagnetic interference assessment result for the wind farm to be built.

[0085] The aforementioned electromagnetic interference assessment method for wind farms under construction involves obtaining the radiation signal frequency of wind turbines in an existing wind farm by measuring the radiated signal field strength at multiple test points within the test frequency band and the background signal field strength of the wind farm under construction. The deviations in site conditions and equipment conditions between the existing and under-construction wind farms are less than preset deviations. Based on the radiated signal frequency and measured radiated signal field strength, the equivalent radiated power of a single wind turbine at each radiated signal frequency in the existing wind farm is determined. Based on the radiated signal frequency, the electromagnetic wave propagation model of the radiated signal from the wind turbines in the wind farm under construction, and the equivalent radiated power of a single wind turbine at each radiated signal frequency, the electromagnetic wave propagation process of the radiated signal from each wind turbine in the wind farm under construction is simulated to obtain the electromagnetic interference assessment results for the wind farm under construction. Before assessing the electromagnetic interference of the wind farm under construction, this method first selects an existing wind farm near the wind farm under construction for data acquisition, obtaining the measured radiated signal field strength at multiple test points within the test frequency band of the existing wind farm. The equivalent radiated power of a single wind turbine at each radiated signal frequency is determined by reverse calculation. Based on the radiated signal frequency, equivalent radiated power, and electromagnetic wave propagation model of the radiated signal of the wind turbine in the wind farm to be built, the operation of each wind turbine in the wind farm to be built can be accurately simulated. Based on the electromagnetic wave propagation simulation process of each wind turbine, the electromagnetic interference assessment results of the wind farm to be built can be accurately obtained.

[0086] The following section details the electromagnetic interference assessment results of the wind farm under construction, obtained by simulating the electromagnetic wave propagation process of each wind turbine's external radiated signal at each radiated signal frequency, based on the frequency of the wind turbine's radiated signal, the electromagnetic wave propagation model of the wind turbine's external radiated signal in the wind farm to be built, and the equivalent radiated power of a single wind turbine at each radiated signal frequency, as described in the above embodiments. Figure 6 As shown, the details include:

[0087] S201, based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency, simulates the electromagnetic wave propagation process of the external radiation signal of each wind turbine in the wind farm to be built, and determines the predicted radiation signal field strength of the wind farm to be built at at least one frequency-using equipment location.

[0088] In this embodiment, the computer device can import the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency into the simulation model. The computer then controls the simulation model to simulate the electromagnetic wave propagation process of the external radiation signal of each wind turbine in the wind farm to be built. After the simulation is completed, the predicted radiation signal field strength at at least one frequency-using equipment location in the wind farm to be built is obtained. Alternatively, the computer device can simulate the propagation process of electromagnetic waves through multiple propagation paths in the wind farm to be built, such as direct radiation, ground reflection, and mountain diffraction, based on the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built. Then, using the equivalent radiation power of a single wind turbine at each radiation signal frequency as the radiation source parameter, the superposition results of the field strength at the corresponding frequency-using equipment location are statistically analyzed to calculate the predicted radiation signal field strength at the frequency-using equipment location.

[0089] S202, based on the comparison results of the predicted radiated signal field strength at any frequency-using equipment location and the corresponding interference field strength limit, determine the electromagnetic interference assessment result of the wind farm to be built.

[0090] Among them, the interference field strength limit refers to the interference field strength that will affect the normal operation of frequency-using equipment. The interference field strength of different frequency-using equipment may be the same or different.

[0091] In this embodiment, for any frequency-using equipment, the computer device can compare the predicted radiated signal field strength at the location of the frequency-using equipment with the corresponding interference field strength limit. If the predicted radiated signal field strength is greater than or equal to the corresponding interference field strength limit, it indicates that the predicted radiated signal field strength at the location of the frequency-using equipment will interfere with the equipment, and the electromagnetic interference assessment result of the wind farm under construction is determined to be interference with the frequency-using equipment. If the predicted radiated signal field strength is less than the corresponding interference field strength limit, it indicates that the predicted radiated signal field strength at the location of the frequency-using equipment will not interfere with the equipment, and the electromagnetic interference assessment result of the wind farm under construction is determined to be no interference with the equipment.

[0092] Furthermore, assuming the predicted radiated signal field strength is greater than or equal to the corresponding interference field strength limit, the computer equipment can also calculate the difference between the predicted radiated signal field strength and the corresponding interference field strength limit, and map the difference based on the relationship between the field strength difference and the interference level to determine the interference level of the wind farm to be built on the frequency-using equipment, and use the interference level as the electromagnetic interference assessment result of the wind farm to be built.

[0093] The aforementioned electromagnetic interference assessment method for wind farms under construction simulates the electromagnetic wave propagation process of each wind turbine's external radiated signal at each radiated signal frequency, based on the wind turbine's radiation signal frequency, the electromagnetic wave propagation model of the wind turbine's external radiated signal in the wind farm, and the equivalent radiated power of a single wind turbine at each radiation signal frequency. This simulation determines the predicted radiated signal field strength at at least one frequency-using equipment location within the wind farm. The electromagnetic interference assessment result of the wind farm is then determined based on the comparison between the predicted radiated signal field strength at any frequency-using equipment location and the corresponding interference field strength limit. This method combines the wind turbine's radiation signal frequency, the equivalent radiated power of a single wind turbine at each radiation signal frequency, and an electromagnetic wave propagation model adapted to the wind turbine's external radiated signal in the wind farm. By simulating the electromagnetic wave propagation process of each wind turbine's external radiated signal in the wind farm, it can accurately obtain the predicted radiated signal field strength corresponding to the frequency-using equipment locations around the wind farm, realistically restoring the spatial electromagnetic radiation distribution characteristics after the wind farm is completed.

[0094] In one embodiment, such as Figure 7 As shown, this paper introduces the specific details of simulating the electromagnetic wave propagation model of the external radiated signal of the wind turbine in the wind farm to be built, based on the radiation signal frequency of the wind turbine, the equivalent radiated power of a single wind turbine at each radiation signal frequency, and determining the predicted radiation signal field strength at at least one frequency-using equipment location in the wind farm to be built. This detailed content includes:

[0095] S301, in the simulation model, set the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, the equivalent radiation power of a single wind turbine at each radiation signal frequency, and the simulation conditions.

[0096] In this embodiment, the computer device can import information such as the latitude and longitude of multiple wind turbine locations, turbine height, latitude and longitude of surrounding frequency-using equipment, and antenna elevation into the simulation model as simulation conditions. The simulation model then sets the radiation signal frequency of the wind turbines and the equivalent radiation power of a single wind turbine at each radiation signal frequency. Simultaneously, a radio wave propagation model adapted to the terrain of the wind farm to be built is selected within the simulation model.

[0097] In one specific embodiment, such as Figure 8 As shown, the detailed content of setting the radiation signal frequency of the wind turbine in the simulation model, the electromagnetic wave propagation model of the wind turbine's external radiation signal in the wind farm to be built, the equivalent radiated power of a single wind turbine at each radiation signal frequency, and the simulation conditions includes:

[0098] S401 imports the spatial location and erection elevation information of multiple wind turbines and frequency-using equipment in the wind farm to be built into the simulation model, and sets the radiation signal frequency of the wind turbine and the equivalent radiation power of a single wind turbine at each radiation signal frequency in the simulation model.

[0099] The spatial location of multiple wind turbines includes their latitude and longitude and their height, while the spatial location of frequency-using equipment includes their latitude and longitude.

[0100] In this embodiment of the application, the computer device can import the spatial location and erection elevation information of multiple wind turbines and frequency-using equipment as simulation conditions into the simulation model, and set the radiation signal frequency of the wind turbine and the equivalent radiation power of a single wind turbine at each radiation signal frequency in the simulation model.

[0101] S402, add the site conditions and radio wave propagation model corresponding to the wind farm to be built to the simulation model to obtain the completed simulation model.

[0102] In this embodiment of the application, after the simulation conditions in the simulation model are set, the computer device can add site conditions such as the geographical location and topography of the wind farm to be built to the simulation model, and select a radio wave propagation model that is suitable for the topography of the wind farm to be built in the simulation model.

[0103] The aforementioned electromagnetic interference assessment method for wind farms under construction involves importing the spatial locations and elevations of multiple wind turbines and frequency-using equipment into a simulation model. The simulation model then sets the radiation signal frequencies of the wind turbines and the equivalent radiation power of a single turbine at each frequency. Finally, it adds site conditions and a radio wave propagation model corresponding to the wind farm, resulting in a fully configured simulation model. When building the simulation model of the wind farm, this method imports real geographical parameters such as the spatial locations and elevations of the wind turbines and surrounding frequency-using equipment. It also matches standardized radiation signal frequencies and high-precision equivalent radiation power per turbine, combining these with the actual site conditions and a suitable radio wave propagation model to complete the model construction. This ensures the model closely reflects the actual data of the wind farm, leading to more accurate simulation results.

[0104] S302, based on the established simulation model, simulate the electromagnetic wave propagation process of all wind turbines in the wind farm to be built to radiate signals to the outside, and determine the predicted radiation signal field strength of the wind farm to be built at at least one frequency-using equipment location.

[0105] In this embodiment of the application, after the simulation model is set up, the computer device can control the simulation model to simulate the electromagnetic wave propagation process of the radiation signals of multiple wind turbines in the wind farm to be built. After the simulation process is completed, the predicted radiation signal field strength of the wind farm to be built at at least one frequency-using equipment location is obtained.

[0106] The aforementioned electromagnetic interference assessment method for wind farms under construction involves setting the radiation signal frequency of the wind turbines, the electromagnetic wave propagation model of the external radiation signals from the wind turbines in the wind farm, the equivalent radiated power of a single wind turbine at each radiation signal frequency, and simulation conditions in the simulation model. Based on the established simulation model, the electromagnetic wave propagation process of the external radiation signals from all wind turbines in the wind farm is simulated to determine the predicted radiation signal field strength at at least one frequency-using equipment location. Before simulation, this method configures the actual data of the wind farm under construction in the simulation model to unify the simulation parameters with the actual parameters. Thus, the predicted radiation signal field strength at at least one frequency-using equipment location can be accurately obtained through the simulation process.

[0107] The following example details the process of determining the electromagnetic interference assessment results of a wind farm under construction based on the comparison between the predicted radiated signal field strength and the corresponding interference field strength limit at any frequency-using equipment location. Figure 9 As shown, the details include:

[0108] S501, if the predicted radiated signal field strength at any location of the frequency-using equipment is less than the corresponding interference field strength limit, it is determined that the wind farm to be built does not interfere with the frequency-using equipment; if the predicted radiated signal field strength at any location of the frequency-using equipment is greater than or equal to the corresponding interference field strength limit, it is determined that the wind farm to be built interferes with the frequency-using equipment.

[0109] In this embodiment, for any frequency-using equipment, the computer device can compare the predicted radiated signal field strength at the location of the frequency-using equipment with the corresponding interference field strength limit. If it is less than the interference field strength limit, it indicates that the field strength at the location of the frequency-using equipment is likely low, meaning that the wind farm under construction will not interfere with the frequency-using equipment. If it is greater than or equal to the interference field strength limit, it indicates that the field strength at the location of the frequency-using equipment is likely high, meaning that the wind farm under construction will interfere with the frequency-using equipment.

[0110] S502 uses the interference situation of the wind farm to be built on each frequency-using equipment as the electromagnetic interference assessment result of the wind farm to be built.

[0111] The interference situations include electromagnetic interference from the wind farm to be built and electromagnetic interference not from the wind farm to be built.

[0112] In the embodiments of this application, for any frequency-using equipment, after obtaining the interference status of the frequency-using equipment, the interference status of the frequency-using equipment is used as the electromagnetic interference assessment result of the wind farm to be built on the frequency-using equipment.

[0113] In the aforementioned electromagnetic interference assessment method for wind farms under construction, if the predicted radiated signal field strength at any location of frequency-using equipment is less than the corresponding interference field strength limit, it is determined that the wind farm under construction does not interfere with the frequency-using equipment; if the predicted radiated signal field strength at any location of frequency-using equipment is greater than or equal to the corresponding interference field strength limit, it is determined that the wind farm under construction interferes with the frequency-using equipment. The interference status of the wind farm under construction on each frequency-using equipment is taken as the electromagnetic interference assessment result of the wind farm under construction. This method, by comparing the preset interference field strength limit with the predicted radiated signal field strength, can accurately determine whether each frequency-using equipment will be interfered with by the wind farm under construction, thereby accurately obtaining the electromagnetic interference assessment result of the wind farm under construction.

[0114] Assume multiple test points include a first test point located under any wind turbine in an operational wind farm, a second test point centered on the first test point, and a third test point, where the distance between the third test point and the center is greater than the distance between the second test point and the center. Figure 4 For example, the first test point is closest to the wind turbine F5, the second test point is slightly farther from the wind turbine F5, and the third test point is farthest from the wind turbine F5.

[0115] In one embodiment, such as Figure 10 As shown, the detailed content of obtaining the radiation signal frequency of wind turbines in the operating wind farm by measuring the radiation signal field strength at multiple test points in the operating wind farm within the test frequency band and the background signal field strength of the wind farm to be built is explained in detail. This detailed content includes:

[0116] S601, compare the measured radiated signal field strength of the first test point in the test frequency band with the background signal field strength to obtain a first comparison result; and compare the measured radiated signal field strength of the second test point and the third test point in the test frequency band to obtain a second comparison result.

[0117] In this embodiment, if the measured radiated signal field strength within the test frequency band is emitted by a wind turbine, then the measured radiated signal field strength collected at the first test point in an operational wind farm is greater than the background signal field strength collected at test point 4 in the wind farm under construction. The computer equipment can compare the measured radiated signal field strength at the first test point within the test frequency band with the background signal field strength. If the measured radiated signal field strength is greater than the background signal field strength, it is determined that the measured radiated signal field strength is normal; if the measured radiated signal field strength is less than or equal to the background signal field strength, it is determined that the measured radiated signal field strength is abnormal.

[0118] During the propagation of electromagnetic waves in free space, the signal loss increases with distance from the radiation source, resulting in a lower detected radiation signal field strength. In the operational wind farm, the measured radiation signal field strength at the second test point is a mid-range detection field strength, while the measured radiation signal field strength at the third test point is a long-range detection field strength. According to the propagation characteristics of electromagnetic waves, the measured radiation signal field strength at the third test point should be less than that at the second test point; otherwise, an anomaly exists.

[0119] S602, based on the first comparison result and the second comparison result, determine the initial radiation signal frequency of the wind turbines in the operating wind farm from the test frequency band.

[0120] In this embodiment of the application, if the first comparison result is that the measured radiation signal field strength is greater than the background signal field strength, and the second comparison result is that the measured radiation signal field strength at the second test point is greater than the measured radiation signal field strength at the third test point, then it is determined that the measured radiation signal field strength satisfies the electromagnetic wave propagation characteristics and is not an abnormal radiation signal frequency. The test frequency corresponding to the measured radiation signal field strength is directly used as the initial radiation signal frequency of the wind turbine in the operating wind farm.

[0121] If the first comparison result shows that the measured radiated signal field strength is less than or equal to the background signal field strength, or if the second comparison result shows that the measured radiated signal field strength at the second test point is less than or equal to the measured radiated signal field strength at the third test point, then the measured radiated signal field strength is determined to not satisfy the electromagnetic wave propagation characteristics and is an abnormal radiated signal frequency. Computer equipment can filter out these abnormal radiated signal frequencies from the test frequency band to obtain the initial radiated signal frequency of the wind turbines in the operating wind farm.

[0122] S603, the known communication signal frequencies are filtered out from the initial radiation signal frequencies to obtain the radiation signal frequencies of the wind turbines in the operating wind farm.

[0123] Among them, the known communication signal frequencies are the same as those of broadcast signals and mobile phone base station signals.

[0124] In this embodiment of the application, during the process of filtering out abnormal radiation signal frequencies, the computer equipment can also eliminate frequencies such as broadcast signals and mobile phone base station signals to obtain the radiation signal frequencies of wind turbines in the operating wind farm.

[0125] In the aforementioned electromagnetic interference assessment method for wind farms under construction, the measured radiated signal field strength at the first test point within the test frequency band is compared with the background signal field strength to obtain a first comparison result; and the measured radiated signal field strength at the second and third test points within the test frequency band is compared to obtain a second comparison result. Based on the first and second comparison results, the initial radiated signal frequency of the wind turbines in the already operational wind farm is determined from the test frequency band; known communication signal frequencies are then filtered out from the initial radiated signal frequencies to obtain the radiated signal frequency of the wind turbines in the already operational wind farm. This method, through the comparison results of the measured radiated signal field strength at the first test point with the background signal field strength, and the comparison results of the measured radiated signal field strength at the second and third test points, can accurately filter out abnormal radiated signal frequencies that do not conform to the propagation characteristics of electromagnetic waves. This allows for precise filtering out of these abnormal radiated signal frequencies and known communication signal frequencies from the test frequency band, ensuring the reliability of the radiated signal frequency of the wind turbines in the already operational wind farm.

[0126] The following example illustrates the process of determining the equivalent radiated power of a single wind turbine in an operational wind farm at each radiated signal frequency based on the turbine's radiated signal frequency and the measured radiated signal field strength. Figure 11 As shown, the relevant content includes:

[0127] S701 imports the spatial locations of multiple wind turbines in the operating wind farm, the location information of the test points, the site conditions corresponding to the operating wind farm, and the electromagnetic wave propagation model of the wind turbine's external radiation signal into the simulation model, and sets the initial radiation signal power of a single wind turbine in the operating wind farm at each radiation signal frequency to zero.

[0128] In this embodiment, the computer device can model the wind turbines in the operating wind farm based on parameters such as the tower material and height, blade material and length, etc., to obtain an operating wind farm model. Based on the location of the operating wind farm, the operating wind farm model is imported into the geographic information system of the simulation model. Then, the spatial locations of multiple wind turbines and the location information of multiple test points in the operating wind farm are imported into the simulation model, and a suitable radio wave propagation model is selected based on the topography of the operating wind farm. In the simulation model, the initial radiated signal power of a single wind turbine in the operating wind farm at each radiated signal frequency is set to 0.

[0129] This simulation model integrates a visual geographic information system, supporting multiple geographic data formats, including at least raster data (terrain height, land cover), vector data, image data, and regional patches. Terrain height includes elevation information, and land cover defines landform data, including additional elevation, conductivity, dielectric constant, roughness, and landform loss. The simulation model also integrates a radio wave propagation model, providing a comprehensive empirical model that supports radio wave propagation simulation in the 10kHz-300GHz frequency band.

[0130] S702, based on the established simulation model, simulates the electromagnetic wave propagation process of external radiation signals from multiple wind turbines in an operational wind farm, and determines the equivalent radiation power of a single wind turbine in an operational wind farm at each radiation signal frequency.

[0131] In this embodiment of the application, after the simulation conditions are set in the simulation model, the computer device can control the simulation model to perform simulation, simulating the electromagnetic wave propagation process of the radiation signals of multiple wind turbines in the operating wind farm. By continuously iteratively optimizing the initial radiation signal power, the optimized radiation power is used as the equivalent radiation power of a single wind turbine in the operating wind farm at each radiation signal frequency.

[0132] The aforementioned electromagnetic interference assessment method for wind farms under construction imports the spatial locations of multiple wind turbines in an existing wind farm, the location information of test points, the site conditions corresponding to the existing wind farm, and the electromagnetic wave propagation model of the wind turbines' external radiated signals into the simulation model. The initial radiated signal power of a single wind turbine in the existing wind farm at each radiated signal frequency is set to zero. Based on the established simulation model, the electromagnetic wave propagation process of the external radiated signals from multiple wind turbines in the existing wind farm is simulated to determine the equivalent radiated power of a single wind turbine in the existing wind farm at each radiated signal frequency. This method imports actual data from the existing wind farm into the simulation model and simulates the electromagnetic wave propagation process of the external radiated signals from multiple wind turbines in the existing wind farm based on the simulation model. This makes the simulation process more closely resemble the actual operation of the wind turbines, thus enabling a more accurate acquisition of the equivalent radiated power of a single wind turbine in the existing wind farm at each radiated signal frequency.

[0133] In one embodiment, such as Figure 12 As shown, the above simulation based on the established simulation model determines the equivalent radiated power of a single wind turbine at each radiated signal frequency in an operational wind farm by simulating the electromagnetic wave propagation process of multiple wind turbines in the operational wind farm. The specific details include:

[0134] S801 simulates the electromagnetic wave propagation process of externally radiated signals from multiple wind turbines in an operational wind farm based on the established simulation model, and obtains the initial field strength simulation value of any test point at each radiation signal frequency.

[0135] In this embodiment of the application, after the simulation model is set up, the computer device can control the simulation model to simulate the electromagnetic wave propagation process of the external radiation signals of multiple wind turbines in the operating wind farm. After the simulation is completed, the initial field strength simulation values ​​of multiple test points at each radiation signal frequency are obtained.

[0136] S802, based on the difference between the initial field strength simulation value and the measured radiation signal field strength corresponding to the test point, adjusts the initial radiation signal power, and continues the simulation based on the adjusted initial radiation signal power until the difference between the field strength simulation value of the test point and the corresponding measured radiation signal field strength is less than a preset threshold, thus obtaining the equivalent radiation power of a single wind turbine in the operating wind farm at each radiation signal frequency.

[0137] In this embodiment, after obtaining the initial field strength simulation value, for any given radiation signal frequency, the computer device can calculate the difference between the initial field strength simulation value and the corresponding measured radiation signal field strength at each test point, and adjust the initial radiation signal power based on this difference. Then, based on the adjusted initial radiation signal power, the simulation model is used to simulate the electromagnetic wave propagation process of the radiation signals emitted by multiple wind turbines in an operating wind farm. The initial radiation signal power is adjusted through multiple simulations until the difference between the adjusted field strength simulation value and the corresponding measured radiation signal field strength is less than a preset threshold, indicating the end of the simulation process. The adjusted initial radiation signal power is then used as the equivalent radiation power of a single wind turbine in the operating wind farm at each radiation signal frequency.

[0138] Figure 13 The flowchart illustrates the process of obtaining equivalent radiated power, which includes: S11: Modeling the wind turbines of the operating wind farm to obtain the turbine model; S12: Setting the initial radiated signal power of a single wind turbine to zero; S13: Importing the wind turbine model into the simulation model, and selecting the electromagnetic wave propagation model in the simulation model; S14: Simulating the electromagnetic wave propagation process of the wind turbine's external radiated signal through the simulation model to obtain the initial field strength simulation value at the test point location; S15: Determining whether the difference between the initial field strength simulation value at the test point location and the corresponding measured radiated signal field strength is less than a preset threshold. If not, proceeding to step S12, reassigning the initial radiated signal power of a single wind turbine; if yes, proceeding to step S16; S16: Obtaining the equivalent radiated power of a single wind turbine at each radiated signal frequency.

[0139] In the aforementioned electromagnetic interference assessment method for wind farms under construction, the propagation process of electromagnetic waves radiated by multiple wind turbines in an already operating wind farm is simulated based on a pre-established simulation model. This yields the initial simulated field strength value at any test point for each radiated signal frequency. Based on the difference between the initial simulated field strength value and the measured radiated signal field strength at the test point, the initial radiated signal power is adjusted. The simulation continues based on the adjusted initial radiated signal power until the difference between the simulated field strength value and the corresponding measured radiated signal field strength at the test point is less than a preset threshold. This yields the equivalent radiated power of a single wind turbine in the already operating wind farm at each radiated signal frequency. This method, by building a simulation model that conforms to the actual operating environment of the already operating wind farm, continuously updates the initial radiated signal power through iterative correction during the simulation process. The relationship between the difference between the simulated and measured field strength values ​​and a preset threshold serves as the stopping condition for iteration, enabling accurate acquisition of the equivalent radiated power of a single wind turbine in the already operating wind farm at each radiated signal frequency.

[0140] In a detailed embodiment, such as Figure 14 As shown, the electromagnetic interference assessment methods for the aforementioned wind farms to be built include:

[0141] S1001: Collect the measured radiated signal field strength at multiple test points in the operating wind farm within the test frequency band and the background signal field strength of the wind farm to be built;

[0142] S1002: Compare the measured radiated signal field strength of the first test point in the test frequency band with the background signal field strength to obtain a first comparison result; and compare the measured radiated signal field strength of the second test point and the third test point in the test frequency band to obtain a second comparison result;

[0143] S1003: Based on the first comparison result and the second comparison result, determine the initial radiation signal frequency of the wind turbines in the operating wind farm from the test frequency band, and filter out the known communication signal frequencies from the initial radiation signal frequencies to obtain the radiation signal frequency of the wind turbines in the operating wind farm.

[0144] S1004: Import the spatial location of multiple wind turbines in the operating wind farm, the location information of the test point, the site conditions corresponding to the operating wind farm, and the electromagnetic wave propagation model of the wind turbine's external radiation signal into the simulation model, and set the initial radiation signal power of a single wind turbine in the operating wind farm at each radiation signal frequency to zero.

[0145] S1005: Based on the completed simulation model, the electromagnetic wave propagation process of the external radiation signal of multiple wind turbines in the operating wind farm is simulated to obtain the initial field strength simulation value of any test point at each radiation signal frequency.

[0146] S1006: Based on the difference between the initial field strength simulation value and the measured radiation signal field strength corresponding to the test point, adjust the initial radiation signal power, and continue the simulation based on the adjusted initial radiation signal power until the difference between the field strength simulation value of the test point and the corresponding measured radiation signal field strength is less than the preset threshold, and obtain the equivalent radiation power of a single wind turbine in the operating wind farm at each radiation signal frequency.

[0147] S1007: Set the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, the equivalent radiation power of a single wind turbine at each radiation signal frequency, and the simulation conditions in the simulation model.

[0148] S1008: Import the spatial location and erection elevation information of multiple wind turbines and frequency-using equipment in the wind farm to be built into the simulation model, and set the radiation signal frequency of the wind turbine and the equivalent radiation power of a single wind turbine at each radiation signal frequency in the simulation model.

[0149] S1009: Add the site conditions and radio wave propagation model corresponding to the wind farm to be built to the simulation model to obtain the completed simulation model;

[0150] S1010: Based on the completed simulation model, simulate the electromagnetic wave propagation process of all wind turbines in the wind farm to be built to determine the predicted radiation signal field strength at at least one frequency-using equipment location in the wind farm to be built.

[0151] S1011: If the predicted radiated signal field strength at any location of the frequency-using equipment is less than the corresponding interference field strength limit, it is determined that the wind farm to be built does not interfere with the frequency-using equipment; if the predicted radiated signal field strength at any location of the frequency-using equipment is greater than or equal to the corresponding interference field strength limit, it is determined that the wind farm to be built interferes with the frequency-using equipment.

[0152] S1012: The interference situation of the wind farm to be built on each frequency-using equipment shall be used as the electromagnetic interference assessment result of the wind farm to be built.

[0153] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0154] Based on the same inventive concept, this application also provides an electromagnetic interference assessment device for a wind farm under construction, used to implement the electromagnetic interference assessment method for the wind farm under construction described above. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations of one or more embodiments of the electromagnetic interference assessment device for a wind farm under construction provided below can be found in the limitations of the electromagnetic interference assessment method for wind farms under construction described above, and will not be repeated here.

[0155] In one exemplary embodiment, such as Figure 15 As shown, an electromagnetic interference assessment device for a wind farm under construction is provided, comprising: an acquisition module 11, a determination module 12, and a simulation module 13, wherein:

[0156] The acquisition module 11 is used to acquire the radiation signal frequency of the wind turbine in the operating wind farm by measuring the radiation signal field strength of multiple test points in the operating wind farm within the test frequency band and the background signal field strength of the wind farm to be built; the deviation between the site conditions and equipment conditions of the operating wind farm and the wind farm to be built is less than the preset deviation.

[0157] The determination module 12 is used to determine the equivalent radiated power of a single wind turbine in an operating wind farm at each radiated signal frequency based on the radiated signal frequency of the wind turbine and the measured radiated signal field strength.

[0158] Simulation module 13 is used to simulate the electromagnetic interference assessment results of the wind farm under construction based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency.

[0159] In an exemplary embodiment, the simulation module includes a first simulation unit and a result determination unit, wherein:

[0160] The first simulation unit is used to simulate the electromagnetic wave propagation process of the electromagnetic wave of each wind turbine in the wind farm to be built, based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency, and to determine the predicted radiation signal field strength of the wind farm to be built at at least one frequency-using equipment location.

[0161] The result determination unit is used to determine the electromagnetic interference assessment result of the wind farm to be built based on the comparison result between the predicted radiated signal field strength at any frequency-using equipment location and the corresponding interference field strength limit.

[0162] In an exemplary embodiment, the first simulation unit is further configured to set the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, the equivalent radiation power of a single wind turbine at each radiation signal frequency, and simulation conditions in the simulation model; and to simulate the electromagnetic wave propagation process of the external radiation signal of all wind turbines in the wind farm to be built based on the set simulation model, so as to determine the predicted radiation signal field strength of the wind farm to be built at at least one frequency-using equipment location.

[0163] In an exemplary embodiment, the first simulation unit is further configured to import the spatial location and erection elevation information of multiple wind turbines and frequency-using equipment in the wind farm to be built into the simulation model, and set the radiation signal frequency of the wind turbine and the equivalent radiation power of a single wind turbine at each radiation signal frequency in the simulation model; and add the site conditions and radio wave propagation model corresponding to the wind farm to be built into the simulation model to obtain the completed simulation model.

[0164] In an exemplary embodiment, the result determination unit is further configured to determine that the wind farm to be built does not interfere with the frequency-using equipment when the predicted radiated signal field strength at any frequency-using equipment location is less than the corresponding interference field strength limit; and to determine that the wind farm to be built interferes with the frequency-using equipment when the predicted radiated signal field strength at any frequency-using equipment location is greater than or equal to the corresponding interference field strength limit; and to use the interference situation of the wind farm to be built on each frequency-using equipment as the electromagnetic interference assessment result of the wind farm to be built.

[0165] In an exemplary embodiment, the acquisition module includes a comparison unit, a frequency determination unit, and a screening unit, wherein:

[0166] The comparison unit is used to compare the measured radiated signal field strength of the first test point in the test frequency band with the background signal field strength to obtain a first comparison result; and to compare the measured radiated signal field strength of the second test point and the third test point in the test frequency band to obtain a second comparison result.

[0167] The frequency determination unit is used to determine the initial radiated signal frequency of the wind turbines in the operating wind farm from the test frequency band based on the first comparison result and the second comparison result.

[0168] The screening unit is used to screen out known communication signal frequencies from the initial radiation signal frequencies to obtain the radiation signal frequencies of wind turbines in the operating wind farm.

[0169] In an exemplary embodiment, the determination module includes an import unit and a second simulation unit, wherein:

[0170] The import unit is used to import the spatial location of multiple wind turbines in the operating wind farm, the location information of the test point, the site conditions corresponding to the operating wind farm, and the electromagnetic wave propagation model of the wind turbine's external radiation signal into the simulation model. The initial radiation signal power of a single wind turbine in the operating wind farm at each radiation signal frequency is set to zero.

[0171] The second simulation unit is used to simulate the electromagnetic wave propagation process of the external radiation signals of multiple wind turbines in an operational wind farm based on the established simulation model, and to determine the equivalent radiation power of a single wind turbine in the operational wind farm at each radiation signal frequency.

[0172] In an exemplary embodiment, the second simulation unit is further configured to simulate the electromagnetic wave propagation process of the external radiation signals of multiple wind turbines in an operational wind farm based on the established simulation model, to obtain the initial field strength simulation value of any test point at each radiation signal frequency; based on the difference between the initial field strength simulation value and the measured radiation signal field strength corresponding to the test point, the initial radiation signal power is adjusted, and the simulation continues based on the adjusted initial radiation signal power until the difference between the field strength simulation value of the test point and the corresponding measured radiation signal field strength is less than a preset threshold, thereby obtaining the equivalent radiation power of a single wind turbine in the operational wind farm at each radiation signal frequency.

[0173] Each module in the electromagnetic interference assessment device for the aforementioned wind farms can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0174] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 16As shown, the computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs in the non-volatile storage media. The database stores data from the electromagnetic interference assessment process of the wind farm to be built. The I / O interfaces are used for information exchange between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements an electromagnetic interference assessment method for a wind farm to be built.

[0175] Those skilled in the art will understand that Figure 16 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0176] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement any embodiment of the electromagnetic interference assessment method for the wind farm to be built described above.

[0177] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements any embodiment of the electromagnetic interference assessment method for the wind farm to be built described above.

[0178] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the content of any embodiment of the electromagnetic interference assessment method for the wind farm to be built described above.

[0179] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0180] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0181] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0182] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for assessing electromagnetic interference in a wind farm under construction, characterized in that, The method includes: The radiation signal frequency of the wind turbines in the operational wind farm is obtained by measuring the radiation signal field strength at multiple test points in the test frequency band and the background signal field strength of the wind farm to be built; the deviation between the site conditions and equipment conditions of the operational wind farm and the wind farm to be built is less than the preset deviation. Based on the radiation signal frequency of the wind turbine and the measured radiation signal field strength, determine the equivalent radiation power of a single wind turbine in the operating wind farm at each radiation signal frequency; Based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency, the electromagnetic wave propagation process of the external radiation signal of each wind turbine in the wind farm to be built is simulated to obtain the electromagnetic interference assessment results of the wind farm to be built.

2. The method according to claim 1, characterized in that, The electromagnetic interference assessment results of the wind farm are obtained by simulating the electromagnetic wave propagation process of each wind turbine's external radiation signal at each radiation signal frequency, based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency. This simulation includes: Based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the external radiation signal of the wind turbine in the wind farm to be built, and the equivalent radiation power of a single wind turbine at each radiation signal frequency, the electromagnetic wave propagation process of the external radiation signal of each wind turbine in the wind farm to be built is simulated to determine the predicted radiation signal field strength of the wind farm to be built at at least one frequency-using equipment location. The electromagnetic interference assessment result of the wind farm to be built is determined based on the comparison between the predicted radiated signal field strength at any frequency-using equipment location and the corresponding interference field strength limit.

3. The method according to claim 2, characterized in that, The method involves simulating the electromagnetic wave propagation process of the externally radiated signals from each wind turbine in the wind farm under construction, based on the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the externally radiated signals from the wind turbines in the wind farm to be built, and the equivalent radiated power of a single wind turbine at each radiation signal frequency. This simulation determines the predicted radiation signal field strength at at least one frequency-using equipment location within the wind farm to be built, including: The simulation model sets the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the wind turbine's external radiation signal in the wind farm to be built, the equivalent radiation power of a single wind turbine at each radiation signal frequency, and the simulation conditions. Based on the established simulation model, the electromagnetic wave propagation process of the external radiation signals of all wind turbines in the wind farm to be built is simulated to determine the predicted radiation signal field strength of the wind farm at at least one frequency-using equipment location.

4. The method according to claim 3, characterized in that, The steps of setting the radiation signal frequency of the wind turbine, the electromagnetic wave propagation model of the wind turbine's external radiation signal in the wind farm to be built, the equivalent radiated power of a single wind turbine at each radiation signal frequency, and the simulation conditions in the simulation model include: The spatial location and erection elevation information of multiple wind turbines and frequency-using equipment in the wind farm to be built are imported into the simulation model, and the radiation signal frequency of the wind turbine and the equivalent radiation power of a single wind turbine at each radiation signal frequency are set in the simulation model. The site conditions corresponding to the wind farm to be built and the electromagnetic wave propagation model are added to the simulation model to obtain the simulation model with the settings completed.

5. The method according to claim 2, characterized in that, The electromagnetic interference assessment result of the wind farm to be built is determined by comparing the predicted radiated signal field strength at any frequency-using equipment location with the corresponding interference field strength limit, including: If the predicted radiation signal field strength at any location of the frequency-using equipment is less than the corresponding interference field strength limit, it is determined that the wind farm to be built does not interfere with the frequency-using equipment; if the predicted radiation signal field strength at any location of the frequency-using equipment is greater than or equal to the corresponding interference field strength limit, it is determined that the wind farm to be built interferes with the frequency-using equipment. The interference situation of the wind farm to be built on each frequency-using equipment is used as the electromagnetic interference assessment result of the wind farm to be built.

6. The method according to any one of claims 1-5, characterized in that, The plurality of test points include a first test point set under any one of the wind turbines in the operating wind farm, a second test point centered on the first test point, and a third test point, wherein the distance between the third test point and the center is greater than the distance between the second test point and the center; The process of obtaining the radiation signal frequency of wind turbines in an operational wind farm by measuring the radiated signal field strength at multiple test points in the operational wind farm within the test frequency band and the background signal field strength of the wind farm to be built includes: The measured radiated signal field strength of the first test point in the test frequency band is compared with the background signal field strength to obtain a first comparison result; and the measured radiated signal field strength of the second test point and the third test point in the test frequency band is compared to obtain a second comparison result. Based on the first comparison result and the second comparison result, the initial radiation signal frequency of the wind turbines in the operating wind farm is determined from the test frequency band; The known communication signal frequencies are filtered out from the initial radiation signal frequencies to obtain the radiation signal frequencies of the wind turbines in the operating wind farm.

7. The method according to any one of claims 1-5, characterized in that, The step of determining the equivalent radiated power of a single wind turbine in the operating wind farm at each radiated signal frequency based on the radiated signal frequency of the wind turbine and the measured radiated signal field strength includes: The spatial locations of multiple wind turbines in the operating wind farm, the location information of the test points, the site conditions corresponding to the operating wind farm, and the electromagnetic wave propagation model of the wind turbine's external radiation signal are all imported into the simulation model. The initial radiation signal power of a single wind turbine in the operating wind farm at each radiation signal frequency is set to zero. Based on the established simulation model, the electromagnetic wave propagation process of the external radiation signals of multiple wind turbines in the operating wind farm is simulated to determine the equivalent radiation power of a single wind turbine in the operating wind farm at each radiation signal frequency.

8. The method according to claim 7, characterized in that, The simulation model, based on the established parameters, simulates the electromagnetic wave propagation process of the radiated signals from multiple wind turbines in the operational wind farm, determining the equivalent radiated power of a single wind turbine at each radiated signal frequency, including: Based on the established simulation model, the electromagnetic wave propagation process of the external radiation signals of multiple wind turbines in the operating wind farm is simulated to obtain the initial field strength simulation value of any test point at each radiation signal frequency. Based on the difference between the initial field strength simulation value and the measured radiation signal field strength corresponding to the test point, the initial radiation signal power is adjusted, and the simulation continues based on the adjusted initial radiation signal power until the difference between the field strength simulation value of the test point and the corresponding measured radiation signal field strength is less than a preset threshold, thereby obtaining the equivalent radiation power of a single wind turbine in the operating wind farm at each radiation signal frequency.

9. An electromagnetic interference assessment device for a wind farm under construction, characterized in that, The device includes: The acquisition module is used to acquire the radiation signal frequency of the wind turbines in the operating wind farm by measuring the radiation signal field strength at multiple test points in the operating wind farm within the test frequency band and the background signal field strength of the wind farm to be built; the deviation between the site conditions and equipment conditions of the operating wind farm and the wind farm to be built is less than a preset deviation. The determination module is used to determine the equivalent radiated power of a single wind turbine in the operating wind farm at each radiated signal frequency based on the radiated signal frequency of the wind turbine and the measured radiated signal field strength. The simulation module is used to simulate the electromagnetic interference assessment results of the wind farm by simulating the electromagnetic wave propagation process of each wind turbine in ...

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 8.

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