Non-contact electrification detection method, device, computer device, medium and product

Abstract

The application relates to a non-contact electrification detection method and device, computer equipment, a medium and a product. The method is applied to a resistance-capacitance coupling detection device and comprises the following steps: erecting the resistance-capacitance coupling detection device in a preset range of a measured conductor, collecting a time-domain voltage signal of the measured conductor, and converting the time-domain voltage signal into an initial frequency-domain signal; obtaining voltage compensation parameters based on a resistance-capacitance coupling voltage division model corresponding to the resistance-capacitance coupling detection device; the voltage compensation parameters comprise amplitude compensation parameters and phase compensation parameters; the resistance-capacitance coupling voltage division model comprises an equivalent resistance of an insulating layer of the measured conductor; compensating each frequency component of the initial frequency-domain signal based on the amplitude compensation parameters and the phase compensation parameters, and determining target amplitudes and target phases of each harmonic component of the measured conductor. The method can reduce the detection error of voltage harmonics and improve the detection accuracy of each harmonic component by considering the equivalent resistance of the insulating layer of the measured conductor.

Description

Technical Field

[0001] This application relates to the field of live-line detection technology, and in particular to a non-contact live-line detection method, apparatus, computer equipment, medium, and product. Background Technology

[0002] With the large-scale integration of power electronic devices, distributed power sources, and nonlinear loads into power systems, voltage waveform distortion problems in distribution networks and user sides are becoming increasingly prominent. Therefore, accurate detection of the harmonic content in operating voltage is a key fundamental technology for power quality monitoring, power equipment condition assessment, and fault analysis.

[0003] Traditionally, non-contact live-line detection technology focuses on measuring the amplitude of power frequency voltage, directly using the equivalent measurement signal for Fourier decomposition to obtain harmonic information.

[0004] However, traditional harmonic detection methods have relatively large detection errors. Summary of the Invention

[0005] Therefore, it is necessary to provide a non-contact live-line detection method, device, computer equipment, computer-readable storage medium, and computer program product that can reduce harmonic detection errors and thus improve the accuracy of harmonic detection, in order to address the above-mentioned technical problems.

[0006] In a first aspect, this application provides a non-contact live-line detection method applied to a resistive-capacitive coupling detection device, the method comprising:

[0007] The RC coupling detection device is set up within a preset range of the conductor under test, the time-domain voltage signal of the conductor under test is collected, and the time-domain voltage signal is converted into an initial frequency-domain signal;

[0008] Based on the RC coupling voltage divider model corresponding to the RC coupling testing equipment, voltage compensation parameters are obtained; the voltage compensation parameters include amplitude compensation parameters and phase compensation parameters; the RC coupling voltage divider model includes the equivalent resistance of the insulation layer of the conductor under test;

[0009] Based on amplitude compensation parameters and phase compensation parameters, compensation processing is performed on each frequency component of the initial frequency domain signal to determine the target amplitude and target phase of each harmonic component of the conductor under test.

[0010] In one embodiment, the voltage compensation parameters include amplitude compensation parameters and phase compensation parameters corresponding to each frequency component. Based on the amplitude compensation parameters and phase compensation parameters, compensation processing is performed on each frequency component of the initial frequency domain signal to determine the target amplitude and target phase of each harmonic component of the conductor under test, including:

[0011] For each frequency component of the initial frequency domain signal, amplitude compensation processing is performed on the frequency components based on the amplitude compensation parameters corresponding to the frequency components to determine the target amplitude of the harmonic components corresponding to the frequency components.

[0012] Based on the phase compensation parameters corresponding to the frequency components, phase compensation processing is performed on the frequency components to determine the target phase of the harmonic components corresponding to the frequency components.

[0013] In one embodiment, the RC coupling detection device includes a first electrode, a second electrode, and a signal detection and acquisition unit. The first electrode and the second electrode are spaced apart by a preset distance. The first electrode is close to the conductor under test, and the second electrode is far from the conductor under test and grounded. The signal detection and acquisition unit is connected to the first electrode and the second electrode respectively.

[0014] The RC coupling voltage divider model includes the conductor under test, the equivalent resistance of the insulating layer, the first equivalent capacitance of the first electrode to the conductor under test, the second equivalent capacitance of the first electrode to ground, the third equivalent capacitance of the first electrode and the second electrode, and the first electrode and the second electrode.

[0015] In this configuration, the conductor under test is connected to the first end of the first electrode in sequence through the equivalent resistance of the insulating layer and the first equivalent capacitance. The second end of the first electrode is connected to the first end of the second electrode through the third equivalent capacitance. The second end of the second electrode is grounded. The first end of the second equivalent capacitance is connected to the first end of the first electrode. The second end of the second equivalent capacitance is grounded.

[0016] In one embodiment, voltage compensation parameters are obtained based on the RC coupling voltage divider model corresponding to the RC coupling detection device, including:

[0017] The voltage compensation parameters are determined based on the equivalent resistance of the insulation layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance, and the frequency components of the initial frequency domain signal.

[0018] In one embodiment, the voltage compensation parameters include amplitude compensation parameters and phase compensation parameters corresponding to each frequency component. Based on the equivalent resistance of the insulating layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance, and each frequency component of the initial frequency domain signal, the voltage compensation parameters are determined, including:

[0019] For each frequency component, the impedance mode corresponding to the frequency component is determined based on the equivalent resistance of the insulation layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance, and the frequency component. The amplitude compensation parameter corresponding to the frequency component is then determined based on the impedance mode corresponding to the frequency component.

[0020] Based on the equivalent resistance of the insulation layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance, and the frequency components, the complex frequency domain transfer function corresponding to the frequency components is determined, and the phase compensation parameters corresponding to the frequency components are determined based on the complex frequency domain transfer function.

[0021] In one embodiment, the first electrode is a spherical electrode and the second electrode is a planar electrode; the method further includes:

[0022] The equivalent resistance of the insulation layer is determined based on the resistivity of the insulation layer, the outer diameter of the insulation layer of the conductor under test, the diameter of the conductor under test, and the coupling length.

[0023] The second equivalent capacitance is determined based on the vacuum permittivity, the relative permittivity of the dielectric, and the radius of the spherical electrode.

[0024] The third equivalent capacitance is determined based on the vacuum permittivity, the relative permittivity of the medium, the radius of the sphere electrode, and the shortest distance from the sphere electrode to the plate electrode.

[0025] The first equivalent capacitance is determined based on the equivalent resistance of the insulation layer, the second equivalent capacitance, the third equivalent capacitance, the actual fundamental voltage of the conductor under test, and the measured fundamental voltage of the conductor under test.

[0026] Secondly, this application also provides a non-contact live-line detection device for use in resistive-capacitive coupling detection equipment, the device comprising:

[0027] The signal acquisition module is used to set up the RC coupling detection device within a preset range of the conductor under test, acquire the time-domain voltage signal of the conductor under test, and convert the time-domain voltage signal into an initial frequency-domain signal;

[0028] The parameter acquisition module is used to acquire voltage compensation parameters based on the RC coupling voltage divider model corresponding to the RC coupling detection device. The voltage compensation parameters include amplitude compensation parameters and phase compensation parameters. The RC coupling voltage divider model includes the equivalent resistance of the insulation layer of the conductor under test.

[0029] The harmonic compensation module is used to compensate each frequency component of the initial frequency domain signal based on amplitude compensation parameters and phase compensation parameters, and to determine the target amplitude and target phase of each harmonic component of the conductor under test.

[0030] 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 the steps of the non-contact live detection method in the first aspect described above.

[0031] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the non-contact live detection method described in the first aspect above.

[0032] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the non-contact live detection method described in the first aspect above.

[0033] The aforementioned non-contact live-line detection method, apparatus, computer equipment, storage medium, and computer program product, applied to an RC coupling detection device, specifically includes: setting up the RC coupling detection device within a preset range of the conductor under test, acquiring the time-domain voltage signal of the conductor under test, and converting the time-domain voltage signal into an initial frequency-domain signal; then, based on the RC coupling voltage divider model corresponding to the RC coupling detection device, obtaining voltage compensation parameters, wherein the voltage compensation parameters include amplitude compensation parameters and phase compensation parameters, and the RC coupling voltage divider model includes the equivalent resistance of the insulation layer of the conductor under test; further, based on the amplitude compensation parameters and phase compensation parameters, performing compensation processing on each frequency component of the initial frequency-domain signal to determine the target amplitude and target phase of each harmonic component of the conductor under test. In other words, the live-line detection method proposed in this application uses a non-contact RC coupling detection device to perform live-line detection on the conductor under test. Simultaneously, considering the equivalent resistance of the insulation layer of the conductor under test, an RC coupling voltage divider model incorporating this equivalent resistance is obtained. Then, based on this RC coupling voltage divider model, voltage compensation parameters including amplitude compensation parameters and phase compensation parameters are determined. Finally, for each frequency component, compensation processing is performed based on the amplitude compensation parameters and phase compensation parameters, ultimately obtaining the target amplitude and target phase of each harmonic component of the conductor under test. Because this example comprehensively considers the equivalent resistance of the insulation layer of the conductor under test, the obtained RC coupling voltage divider model is closer to the actual measurement environment, and the obtained voltage compensation parameters are more accurate. Therefore, by using these voltage compensation parameters to compensate each frequency component separately, the amplitude and phase of each harmonic component obtained are also closer to the actual amplitude and phase of each harmonic component of the conductor under test, thus reducing the detection error of voltage harmonics and improving the detection accuracy of each harmonic component. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a diagram illustrating the application environment of a non-contact live-line detection method in one embodiment.

[0036] Figure 2 This is a flowchart illustrating a non-contact live-line detection method in one embodiment;

[0037] Figure 3 This is a schematic diagram of the circuit structure of a resistor-capacitor coupled voltage divider model in one embodiment;

[0038] Figure 4 This is a schematic diagram of the complete process of a non-contact live-line detection method in one embodiment;

[0039] Figure 5 This is a structural block diagram of a non-contact live-line detection device in one embodiment;

[0040] Figure 6 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0041] 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.

[0042] With the large-scale integration of power electronic devices, distributed power sources, and nonlinear loads into power systems, voltage waveform distortion problems in distribution networks and user-side systems are becoming increasingly prominent. Voltage harmonics not only cause additional losses, insulation aging, and overheating in power equipment, but can also lead to relay protection malfunctions, metering errors, and electromagnetic compatibility issues, becoming a significant factor affecting power quality and the safe operation of the power grid. Therefore, accurate detection of the harmonic content in operating voltage is a key fundamental technology for power quality monitoring, power equipment condition assessment, and fault analysis.

[0043] Currently, voltage harmonic detection mainly relies on contact-type measuring devices, such as voltage transformers, capacitive dividers, or direct electrical connection sampling devices, to acquire the actual voltage signal before performing Fourier analysis. However, in practical applications, this type of contact measurement method generally suffers from problems such as complex installation, the need for power outages, or damage to the original insulation structure, and is difficult to implement in high-voltage, fully insulated, or space-constrained environments. Furthermore, contact-type devices are susceptible to environmental factors, insulation aging, and ferroresonance during long-term operation, and their frequency response characteristics may be distorted in the higher harmonic frequency bands, further limiting the accuracy and applicability of harmonic measurements.

[0044] To overcome the aforementioned shortcomings, non-contact voltage measurement technology has gradually gained attention. Among them, non-contact live-line detection methods based on capacitive coupling have significant advantages in terms of safety and installation flexibility. However, existing non-contact live-line detection technologies mostly focus on power frequency voltage amplitude measurement, directly using the equivalent measurement signal for Fourier decomposition to obtain harmonic information, resulting in large detection errors. Existing voltage harmonic detection methods have the following two drawbacks:

[0045] 1. Existing technologies generally treat the insulating layer of the conductive core as an ideal insulator, ignoring the equivalent resistance of the insulating layer and only focusing on the capacitive coupling effect. This cannot avoid the amplitude attenuation and phase shift of high-order harmonics caused by system frequency response distortion.

[0046] 2. Existing technology ignores the objective fact that non-contact RC coupling voltage divider structures have different transmission characteristics for different frequency components, resulting in large deviations in the calculation results of harmonic voltage content, especially in the analysis of higher harmonics.

[0047] Therefore, it is necessary to consider the influence of the equivalent resistance of the insulation layer on the test circuit, construct a non-contact RC coupling voltage divider model, and combine the frequency characteristics of non-contact RC coupling to perform targeted conversion of each frequency component for harmonic charging detection method, so as to achieve accurate and reliable measurement of voltage harmonic content without electrical contact. This is of great significance for improving the engineering practicality of non-contact power quality monitoring technology.

[0048] Based on this, this application provides a non-contact live detection method. By acquiring the equivalent resistance of the insulation layer of the conductor under test, and establishing a resistance-capacitance coupled voltage divider model based on the equivalent resistance of the insulation layer, the acquired voltage signal is processed based on the resistance-capacitance coupled voltage divider model to obtain accurate and reliable voltage compensation parameters. Based on the voltage compensation parameters, each frequency component is compensated to obtain amplitude and phase data of each harmonic component that are closer to the real result, providing accurate data support for subsequent analysis and thus improving the accuracy of subsequent analysis applications.

[0049] The non-contact live-line detection method provided in this application embodiment can be applied to, for example... Figure 1In the application environment shown, the RC coupling detection device 101 can be a non-contact voltage measurement device, including a non-contact sensing unit and a signal detection and acquisition unit. The non-contact sensing unit can be designed with two opposing electrode components based on the capacitive coupling principle. The upper electrode (such as the first electrode) is close to the conductor being measured, and the lower electrode (such as the second electrode) is grounded. The signal detection and acquisition unit is connected to both ends of the upper and lower electrodes. The signal detection and acquisition unit acquires the voltage signal of the conductor being measured through voltage coupling, realizing the detection of the conductor being measured being charged. Furthermore, the signal detection and acquisition unit can also perform a series of harmonic analysis and processing operations on the acquired voltage signal, and finally obtain the accurate amplitude and phase information of each harmonic component of the conductor being measured.

[0050] For example, the upper and lower electrodes can be ball electrodes, plate electrodes, or a combination thereof. For example, both upper and lower electrodes can be ball electrodes, or both upper and lower electrodes can be plate electrodes, or the upper (or lower) electrode can be a ball electrode and the lower (or upper) electrode can be a plate electrode, etc. In practical applications, it is not limited to a combination of ball electrodes and plate electrodes, and may also include electrodes and combinations of other structures. This application does not specifically limit this.

[0051] In one exemplary embodiment, such as Figure 2 As shown, a non-contact live-line detection method is provided, which can be applied to... Figure 1 Taking an RC coupling detection device as an example, the following steps are used: steps 201 to 203. Specifically:

[0052] Step 201: Set up the RC coupling detection device within a preset range of the conductor under test, collect the time-domain voltage signal of the conductor under test, and convert the time-domain voltage signal into an initial frequency-domain signal.

[0053] In actual measurement, the non-contact sensing unit can be placed within a preset range (e.g., 10~30cm) of the conductor being measured and fixed using an insulated operating rod. The upper electrode should be at a height H above the ground, avoiding the metal frame, while the lower electrode should be grounded. By adjusting the distance between the upper and lower electrodes, a suitable output voltage can be achieved, and the original coupled time-domain voltage signal can be recorded by the signal detection and acquisition unit. For example, time-domain voltage signals can be... Anti-aliasing filtering is performed to output a discrete effective voltage signal; then, a Fast Fourier Decomposition is performed on the discrete effective voltage signal to obtain the discrete signal in the time domain. Convert to initial frequency domain signal , k=1,2,…n.

[0054] For example, anti-aliasing filtering may include, but is not limited to, processing steps such as filter settings, filter implementation, and aliasing verification. Filter settings may include setting the cutoff frequency. Set as To provide approximately 10% protection, ensuring a transition zone steepness >40 dB / decade, effectively suppressing [damage / decade]. The frequency components. Filtering implementation: [The text abruptly ends here, likely due to an incomplete sentence or a formatting error.] Real-time filtering is performed to remove noise levels higher than those introduced by environmental electromagnetic interference or stray parameters of the sensor model. High-frequency noise. Aliasing verification: Digital acquisition is performed at a sampling rate no lower than the preset rate (e.g., 27.5 KSPS) to ensure coverage of harmonics of the preset number (e.g., 25th order). Finally, the acquired data is stored as a discrete signal in time series. Where n is a positive integer, such as 25. It should be noted that the preset sampling rate is related to the preset number of times, and the above example is only one possibility.

[0055] For example, when outputting a discrete effective voltage signal, the discrete effective voltage signal can be preprocessed, and then time-frequency conversion can be performed based on the preprocessed discrete effective voltage signal to obtain an initial frequency domain signal. The preprocessing may include, but is not limited to, using mean calculation to eliminate DC components and applying a Hanning window function to suppress spectral leakage caused by non-integer period truncation, etc., and the embodiments of this application do not specifically limit this.

[0056] Step 202: Obtain voltage compensation parameters based on the RC coupling voltage divider model corresponding to the RC coupling detection device.

[0057] The voltage compensation parameters include amplitude compensation parameters and phase compensation parameters; the RC coupling voltage divider model includes the equivalent resistance of the insulation layer of the conductor under test.

[0058] For example, the detection principle of the RC coupling detection device can be equivalent to an RC coupling voltage divider model. This RC coupling voltage divider model comprehensively considers the equivalent resistance of the insulation layer of the conductor under test. Therefore, in this example, the equivalent RC coupling voltage divider model includes the equivalent resistance of the insulation layer of the conductor under test. In the equivalent RC coupling voltage divider model, one end of the equivalent resistance of the insulation layer is connected to the conductor under test, and the other end of the equivalent resistance of the insulation layer is connected to the upper electrode. Of course, the RC coupling voltage divider model may also include at least one equivalent capacitance, including but not limited to one or more of the following: the equivalent stray capacitance of the first electrode to ground (also known as the equivalent capacitance to ground), the equivalent capacitance of the first electrode to the conductor under test, and the relative equivalent capacitance between the first electrode and the second electrode.

[0059] For example, based on the RC-coupled voltage divider model, each model parameter in the model can be determined. Then, based on these model parameters, voltage compensation parameters, including amplitude compensation parameters and phase compensation parameters, are determined. These voltage compensation parameters are used to compensate for each frequency component in each initial frequency signal to obtain the target amplitude and target phase of each harmonic component of the conductor under test. For example, the voltage compensation parameters can be the same or different for each frequency component. It should be noted that the same voltage compensation parameters can include both amplitude compensation parameters and phase compensation parameters being the same, while different voltage compensation parameters can include at least one difference between amplitude compensation parameters and phase compensation parameters. For instance, corresponding amplitude compensation parameters and phase compensation parameters can be determined separately for each frequency component.

[0060] Step 203: Based on the amplitude compensation parameters and phase compensation parameters, perform compensation processing on each frequency component of the initial frequency domain signal to determine the target amplitude and target phase of each harmonic component of the conductor under test.

[0061] For example, for each frequency component of the initial frequency domain signal For k=1,2,…n, amplitude compensation parameters can be used for each frequency component. Amplitude compensation is performed to obtain the target amplitude of each harmonic component, and phase compensation parameters can be used to adjust the amplitude of each frequency component. Phase compensation is performed to obtain the target phase of each harmonic component.

[0062] For example, when the voltage compensation parameters include amplitude compensation parameters and phase compensation parameters corresponding to each frequency component, for each frequency component of the initial frequency domain signal... It can perform amplitude compensation processing on the frequency component based on the amplitude compensation parameter corresponding to the frequency component to determine the target amplitude of the harmonic component corresponding to the frequency component; and perform phase compensation processing on the frequency component based on the phase compensation parameter corresponding to the frequency component to determine the target phase of the harmonic component corresponding to the frequency component.

[0063] In the aforementioned non-contact live-line detection method, the RC coupling detection device is installed within a preset range of the conductor under test to acquire the time-domain voltage signal of the conductor under test and convert the time-domain voltage signal into an initial frequency-domain signal. Then, based on the RC coupling voltage divider model corresponding to the RC coupling detection device, voltage compensation parameters are obtained. The voltage compensation parameters include amplitude compensation parameters and phase compensation parameters, and the RC coupling voltage divider model includes the equivalent resistance of the insulation layer of the conductor under test. Furthermore, based on the amplitude compensation parameters and phase compensation parameters, each frequency component of the initial frequency-domain signal is compensated to determine the target amplitude and target phase of each harmonic component of the conductor under test. In other words, the live-line detection method proposed in this application uses a non-contact RC coupling detection device to perform live-line detection on the conductor under test. Simultaneously, considering the equivalent resistance of the insulation layer of the conductor under test, an RC coupling voltage divider model incorporating this equivalent resistance is obtained. Then, based on this RC coupling voltage divider model, voltage compensation parameters including amplitude compensation parameters and phase compensation parameters are determined. Finally, for each frequency component, compensation processing is performed based on the amplitude compensation parameters and phase compensation parameters, ultimately obtaining the target amplitude and target phase of each harmonic component of the conductor under test. Because this example comprehensively considers the equivalent resistance of the insulation layer of the conductor under test, the obtained RC coupling voltage divider model is closer to the actual measurement environment, and the obtained voltage compensation parameters are more accurate. Therefore, by using these voltage compensation parameters to compensate each frequency component separately, the amplitude and phase of each harmonic component obtained are also closer to the actual amplitude and phase of each harmonic component of the conductor under test, thus reducing the detection error of voltage harmonics and improving the detection accuracy of each harmonic component.

[0064] Furthermore, in this example, based on the amplitude and phase response characteristics of the RC coupling voltage divider model at a specific frequency, the amplitude compensation parameters and phase compensation parameters corresponding to each frequency component can be obtained respectively. The harmonic components in the original harmonic spectrum can be independently compensated and converted, thereby accurately restoring the true harmonic voltage content and phase of the conductor under test, further improving the detection accuracy of each harmonic component, especially improving the accuracy of high-order harmonic measurement. The method proposed in this embodiment not only overcomes the limitations of physical access required for contact measurement and the harmonic analysis error caused by neglecting frequency response in traditional non-contact measurement, but also realizes reliable and accurate detection of voltage harmonic content under safe and convenient non-contact conditions.

[0065] In one exemplary embodiment, such as Figure 3 As shown, a schematic diagram of a resistor-capacitor coupled voltage divider model is presented. Figure 1Taking the structure shown as an example, the RC coupling detection device may include a non-contact sensing unit and a signal detection and acquisition unit. In this example, the non-contact sensing unit may include a first electrode (i.e., the upper electrode, such as the ball electrode Q1) and a second electrode (i.e., the lower electrode, such as the plate electrode Q2). The first electrode Q1 and the second electrode Q2 are spaced apart by a preset distance. The first electrode Q1 is close to the conductor under test, and the second electrode Q2 is far away from the conductor under test and grounded. The signal detection and acquisition unit is connected to the first electrode Q1 and the second electrode Q2 respectively.

[0066] In this example, the upper hemisphere electrode and lower hemisphere electrode structure are used as the core components of the capacitive coupling structure. When an alternating voltage is applied to the conductor under test, an alternating electric field is generated in the surrounding space. Simultaneously, a non-contact sensor couples the voltage signal to the spatial electric field signal generated, thereby acquiring the voltage signal. Based on the device structure of this RC coupling detection device, its corresponding RC coupling voltage divider model can include the conductive core of the conductor under test, the insulating layer of the conductor under test, the upper hemisphere electrode, the lower hemisphere electrode, and the signal detection and acquisition unit.

[0067] Based on this, the RC coupling voltage divider model can also include the equivalent resistance R1 of the insulating layer of the conductive core of the conductor under test, and the first equivalent capacitance C of the first electrode Q1 to the conductor under test. t1 The second equivalent capacitance C of the first electrode Q1 to ground d1 And the third equivalent capacitance C of the first electrode Q1 and the second electrode Q2. 12 The conductive core of the conductor under test is connected in parallel through the equivalent resistance R1 of the insulating layer and the first equivalent capacitance C. t1 The first terminal of the first electrode Q1 is connected to the first terminal, and the second terminal of the first electrode Q1 is connected to the third equivalent capacitance C. 12 The first terminal of the second electrode Q2 is connected to the ground, and the second terminal of the second electrode Q2 is grounded. The second equivalent capacitance C d1 The first terminal is connected to the first terminal of the first electrode Q1, and the second equivalent capacitance C d1 The second terminal is grounded, meaning the first electrode Q1 is connected to the second equivalent capacitance C. d1 It is connected to ground; the two terminals of the signal detection and acquisition unit are respectively connected to the first electrode Q1 and the second electrode Q2.

[0068] It should be noted that in this example, the first electrode is a spherical electrode and the second electrode is a planar electrode. Of course, other electrode types can also be used in other implementations; this application is only used as an example. Based on the RC coupling voltage divider model of this example, the equivalent resistance R1 of the above insulating layer and the first equivalent capacitance C... t1 Second equivalent capacitance C d1 and the third equivalent capacitance C 12 The methods for determining can include, in order:

[0069] The equivalent resistance of the insulation layer can be determined based on the resistivity of the insulation layer, the outer diameter of the insulation layer of the conductor under test, the diameter of the conductor under test, and the coupling length. For example, the equivalent resistance of the insulation layer of the conductor under test can be defined as R1, and its calculation formula is as follows:

[0070] (1)

[0071] in, Where is the resistivity of the insulating layer (insulating material) (in Ω·m), D is the outer diameter of the insulating layer of the conductor under test (in m), d is the diameter of the conductor under test (in m), and L is the coupling length (in m).

[0072] First equivalent capacitance C t1 With the second equivalent capacitance C d1 Determined by spatial location, the third equivalent capacitance C 12 The value is related to the distance between the sphere and the plate electrode and the area directly opposite. With the center of the sphere's base as the polar axis, at a radial distance r from the center, the local gap between the sphere and the plate is:

[0073] (2)

[0074] Where h is the shortest distance from the spherical electrode to the planar electrode, R is the radius of the spherical electrode, and the corresponding infinitesimal capacitance can be expressed as:

[0075] (3)

[0076] in, The vacuum permittivity, Given the relative permittivity of the dielectric, substituting formula (2) into formula (3) yields the relative third equivalent capacitance C between the ball electrode and the plate electrode. 12 That is, for the third equivalent capacitance, it can be based on the vacuum dielectric constant. Relative permittivity of the medium The radius R of the spherical electrode and the closest distance h from the spherical electrode to the plate electrode are used to determine the third equivalent capacitance C. 12 The third equivalent capacitance C 12 It can be represented as:

[0077] (4)

[0078] Regarding the second equivalent capacitance C d1 It can be based on the vacuum permittivity. Relative permittivity of the medium Determine the second equivalent capacitance C based on the radius R of the spherical electrode. d1 The second equivalent capacitance C d1 It can be represented as:

[0079] (5)

[0080] First equivalent capacitance C t1 The value of is determined by the spatial position of the conductor under test and the ball electrode. Based on Kirchhoff's laws, according to the above non-contact RC coupling voltage divider model, when an alternating voltage U0 is applied to the conductive core of the conductor under test, combined with the original fundamental voltage of the conductor under test... Fundamental voltage obtained by non-contact detection The result is obtained through joint calculation. For example, regarding the first equivalent capacitance C... t1 It can be based on the equivalent resistance R1 of the insulation layer and the second equivalent capacitance C. d1 Third equivalent capacitance C 12 The actual fundamental voltage of the conductor being measured and the fundamental voltage of the conductor under test. Determine the first equivalent capacitance C t1 For example: the first equivalent capacitance C t1 It can be represented as:

[0081] (6)

[0082] Furthermore, given that the equivalent resistance of the insulation layer, the first equivalent capacitance, the second equivalent capacitance, and the third equivalent capacitance are determined, step 202 above, "obtaining voltage compensation parameters based on the RC coupling voltage divider model corresponding to the RC coupling detection device," may include:

[0083] Based on the equivalent resistance of the insulation layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance, and the frequency components of the initial frequency domain signal, voltage compensation parameters are determined. These voltage compensation parameters can include amplitude compensation parameters and phase compensation parameters corresponding to each frequency component. The determination process for the amplitude compensation parameters and phase compensation parameters corresponding to each frequency component is described in detail below.

[0084] First, for amplitude compensation parameters, for example, for each frequency component, the impedance mode corresponding to the frequency component can be determined first based on the equivalent resistance of the insulation layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance and the frequency component. Then, the amplitude compensation parameter corresponding to the frequency component can be determined based on the impedance mode corresponding to the frequency component.

[0085] For example, the original harmonic spectrum can be compensated and converted by combining the frequency response characteristics of the non-contact RC voltage divider structure with the various model parameters in the above RC coupling voltage divider model. Assume the harmonic components of the conductor under test are... For k=2,3,…n, the amplitude response can be expressed as:

[0086] (7)

[0087] in, The amplitude compensation parameter represents the amplitude-frequency response (amplitude variation with frequency) of the RC-coupled voltage divider model. This indicates the RC coupling voltage divider model in the frequency component. The square of the impedance magnitude reflects the impedance characteristics of the RC-coupled voltage divider model at the corresponding frequency. The equivalent impedance of a circuit typically consists of a real part (resistive component) and an imaginary part (reactive component). Here, The term is related to the real part of the impedance. The term is related to the imaginary part of the impedance; the square root of the sum of the squares of the two terms represents the voltage divider model of the RC coupling at the frequency component. The impedance mode below.

[0088] Based on this, in formula (7) That is, the amplitude compensation parameter is defined by the "impedance mode". By changing the parameter k, the correction coefficient of the amplitude under different frequency components can be determined, and the amplitude compensation parameter corresponding to each frequency component can be obtained.

[0089] Secondly, for the phase compensation parameters, for example, for each frequency component, the complex frequency domain transfer function corresponding to the frequency component can be determined first based on the equivalent resistance of the insulation layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance and the frequency component, and then the phase compensation parameter corresponding to the frequency component can be determined based on the complex frequency domain transfer function.

[0090] For example, the complex frequency domain transfer function can be determined using the nodal voltage method, and its expression can be:

[0091] (8)

[0092] in, These are the phase compensation parameters. They are determined based on the transfer function (complex frequency domain characteristics) of the RC-coupled voltage divider model, i.e., the frequency response, to identify the phase compensation parameters for different frequency components. Here, j is the imaginary unit (…). ), representing the characteristic of "phase orthogonality"; The first equivalent capacitance The reciprocal of the capacitive reactance (capacitive reactance is) When combined with j, the whole represents the first equivalent capacitance. Admittance characteristics (the ratio of current to voltage) in the complex frequency domain.

[0093] Here is the complex impedance expression for the RC-coupled voltage divider model, where 1 is the reference term. Equivalent resistance of insulation layer First equivalent capacitance Second equivalent capacitance Third equivalent capacitance The real part of the combined RC coupling term (reflecting the loss characteristics of the combined effect of resistor and capacitor). The first equivalent capacitance The capacitive imaginary part (reflecting the phase characteristics of the capacitor).

[0094] The formula on the right side of equation (8) The transfer function of the RC-coupled voltage divider model describes the RC-coupled voltage divider model in the frequency components. Below, the complex ratio of the output to the input (including amplitude and phase information). Among them, As a phase compensation parameter, this formula contains both amplitude and phase information. It is by utilizing the phase characteristics (complex numerical argument) of this transfer function that phase correction is achieved.

[0095] Based on this, given the amplitude compensation parameters and phase compensation parameters corresponding to each frequency component, compensation and correction can be performed on each frequency component of the initial frequency domain signal to obtain the target amplitude and target phase of each harmonic component corresponding to each frequency component. Among these, the amplitude response characteristics can be used to determine... and The amplitude characteristic relationship is as follows:

[0096] (9)

[0097] in, Frequency components The corresponding amplitude compensation parameters are determined using the formula (7) above. Frequency components The measured amplitude of the corresponding harmonic components, Frequency components The target amplitude of the corresponding harmonic components after amplitude compensation.

[0098] By performing the amplitude compensation calculations described above on each harmonic component, the magnitude of each harmonic voltage of the conductor under test can be obtained: .

[0099] Based on the phase response characteristics, it can be determined that... and The phase characteristic relationship is as follows:

[0100] (10)

[0101] in, Frequency components The corresponding phase compensation parameters are determined using the above formula (8), and the frequency components can be determined using formula (10). The target phase after phase compensation of the corresponding harmonic components.

[0102] In this embodiment, by compensating and converting each harmonic component in the original harmonic spectrum, the true voltage content (amplitude) and phase characteristics of the conductor under test at the fundamental frequency and each harmonic frequency are obtained, forming the compensated harmonic spectrum. Since the compensation process is based on the frequency response characteristics of the non-contact RC voltage divider structure and is performed independently for each frequency component, the non-uniform attenuation caused by the non-contact measurement channel to different frequency components is effectively eliminated, thus improving the accuracy of the harmonic voltage calculation results.

[0103] In one exemplary embodiment, such as Figure 4 As shown, a complete embodiment of a non-contact live-line detection method is provided. First, the coupled voltage signal (i.e., time-domain voltage signal) of the conductor under test is acquired through a non-contact RC coupling structure and digitally acquired and preprocessed to obtain a time-domain discrete signal. Then, the preprocessed time-domain discrete signal is transformed and decomposed to obtain the original harmonic spectrum, i.e., the initial frequency domain signal. Next, based on a non-contact RC voltage divider model including the equivalent resistance of the insulation layer, key voltage divider parameters are extracted and calculated, including the equivalent resistance of the insulation layer, the first equivalent capacitance, the second equivalent capacitance, and the third equivalent capacitance. Furthermore, finally, based on the amplitude and phase response characteristics of the voltage divider model at a specific frequency, each harmonic component in the original harmonic spectrum is independently compensated and converted, thereby accurately restoring the true harmonic voltage content and phase of the conductor under test, achieving accurate acquisition of the harmonic voltage content of the conductor under test.

[0104] Specifically, the non-contact voltage divider structure is regarded as a measurement channel with frequency response characteristics. After acquiring the equivalent voltage signal, it is first subjected to Fourier decomposition to obtain the amplitude and phase information of each frequency component. Then, based on the frequency characteristics of the non-contact voltage divider structure, each frequency component is compensated and converted to obtain the true amplitude and phase information of each harmonic voltage of the conductor under test.

[0105] This method overcomes the safety and access limitations of contact-based detection, achieving equivalent accuracy under non-contact conditions, and is suitable for scenarios such as distribution network harmonic monitoring and equipment status analysis. Furthermore, on the one hand, by comprehensively considering the influence of the equivalent resistance of the insulation layer on the test circuit, a non-contact RC coupling voltage divider model is constructed, which avoids amplitude attenuation and phase shift problems caused by system frequency response distortion in higher harmonics, improving the detection accuracy of each harmonic component. On the other hand, the introduction of a frequency-related conversion mechanism avoids systematic errors caused by a uniform scaling factor, especially improving the accuracy of higher harmonic measurements, enabling the non-contact live-line detection method to be reliably applied to voltage harmonic analysis scenarios.

[0106] It should be understood that although the steps in the flowcharts of the embodiments described above 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 embodiments described above 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.

[0107] Based on the same inventive concept, this application also provides a non-contact live-line detection device for implementing the aforementioned non-contact live-line detection method. The solution provided by this device is similar to the implementation described in the above method; therefore, the specific limitations of one or more embodiments of the non-contact live-line detection device provided below can be found in the limitations of the non-contact live-line detection method described above, and will not be repeated here.

[0108] In one exemplary embodiment, such as Figure 5 As shown, a non-contact live-line detection device is provided, applied to resistive-capacitive coupling detection equipment, including: a signal acquisition module 501, a parameter acquisition module 502, and a harmonic compensation module 503, wherein:

[0109] The signal acquisition module 501 is used to set up the RC coupling detection device within a preset range of the conductor under test, acquire the time-domain voltage signal of the conductor under test, and convert the time-domain voltage signal into an initial frequency-domain signal.

[0110] The parameter acquisition module 502 is used to acquire voltage compensation parameters based on the RC coupling voltage divider model corresponding to the RC coupling detection device. The voltage compensation parameters include amplitude compensation parameters and phase compensation parameters. The RC coupling voltage divider model includes the equivalent resistance of the insulation layer of the conductor under test.

[0111] The harmonic compensation module 503 is used to compensate each frequency component of the initial frequency domain signal based on the amplitude compensation parameters and the phase compensation parameters, and to determine the target amplitude and target phase of each harmonic component of the conductor under test.

[0112] In one embodiment, the voltage compensation parameters include amplitude compensation parameters and phase compensation parameters corresponding to each frequency component, and the harmonic compensation module 503 includes:

[0113] The amplitude compensation unit is used to perform amplitude compensation processing on each frequency component of the initial frequency domain signal based on the amplitude compensation parameters corresponding to the frequency component, and to determine the target amplitude of the harmonic component corresponding to the frequency component.

[0114] The phase compensation unit is used to perform phase compensation processing on the frequency component based on the phase compensation parameters corresponding to the frequency component, and to determine the target phase of the harmonic component corresponding to the frequency component.

[0115] In one embodiment, the RC coupling detection device includes a first electrode, a second electrode, and a signal detection and acquisition unit. The first electrode and the second electrode are spaced apart by a preset distance. The first electrode is close to the conductor under test, and the second electrode is far from the conductor under test and grounded. The signal detection and acquisition unit is connected to the first electrode and the second electrode respectively.

[0116] The RC coupling voltage divider model includes the conductor under test, the equivalent resistance of the insulating layer, the first equivalent capacitance of the first electrode to the conductor under test, the second equivalent capacitance of the first electrode to ground, the third equivalent capacitance of the first electrode and the second electrode, and the first electrode and the second electrode.

[0117] In this configuration, the conductor under test is connected to the first end of the first electrode in sequence through the equivalent resistance of the insulating layer and the first equivalent capacitance. The second end of the first electrode is connected to the first end of the second electrode through the third equivalent capacitance. The second end of the second electrode is grounded. The first end of the second equivalent capacitance is connected to the first end of the first electrode. The second end of the second equivalent capacitance is grounded.

[0118] In one embodiment, the parameter acquisition module 502 is specifically used to determine voltage compensation parameters based on the equivalent resistance of the insulation layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance, and each frequency component of the initial frequency domain signal.

[0119] In one embodiment, the voltage compensation parameters include amplitude compensation parameters and phase compensation parameters corresponding to each frequency component. The parameter acquisition module 502 is specifically used to determine the impedance mode corresponding to each frequency component based on the equivalent resistance of the insulating layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance, and the frequency component, and to determine the amplitude compensation parameter corresponding to the frequency component based on the impedance mode corresponding to the frequency component; and to determine the complex frequency domain transfer function corresponding to the frequency component based on the equivalent resistance of the insulating layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance, and the frequency component, and to determine the phase compensation parameter corresponding to the frequency component based on the complex frequency domain transfer function.

[0120] In one embodiment, the first electrode is a spherical electrode, the second electrode is a flat plate electrode, and the device further includes:

[0121] The equivalent resistance determination module is used to determine the equivalent resistance of the insulation layer based on the resistivity of the insulation layer, the outer diameter of the insulation layer of the conductor under test, the diameter of the conductor under test, and the coupling length.

[0122] The second equivalent capacitance determination module is used to determine the second equivalent capacitance based on the vacuum permittivity, the relative permittivity of the dielectric, and the radius of the ball electrode.

[0123] The third equivalent capacitance determination module is used to determine the third equivalent capacitance based on the vacuum dielectric constant, the relative dielectric constant of the medium, the radius of the ball electrode, and the shortest distance from the ball electrode to the plate electrode.

[0124] The first equivalent capacitance determination module is used to determine the first equivalent capacitance based on the equivalent resistance of the insulation layer, the second equivalent capacitance, the third equivalent capacitance, the actual fundamental voltage of the conductor under test, and the measured fundamental voltage of the conductor under test.

[0125] Each module in the aforementioned non-contact live-line detection device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0126] In one exemplary embodiment, a computer device is provided, which may be an RC coupling detection device, including a non-contact sensing unit and a signal detection and acquisition unit, and its internal structure diagram may be as follows. Figure 6As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When executed by the processor, the computer program implements a non-contact live detection method. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0127] Those skilled in the art will understand that Figure 6 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.

[0128] 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 the steps of the non-contact live detection method in any of the above embodiments.

[0129] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the non-contact live detection method in any of the above embodiments.

[0130] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the non-contact live detection method in any of the above embodiments.

[0131] It should be noted that the data involved in this application (including but not limited to data used for analysis, data stored, data displayed, etc.) are all information and data that have been fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0132] Those skilled in the art will understand that all or part of the processes in 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 described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile 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, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0133] 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 specification.

[0134] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent 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 non-contact live-line detection method, characterized in that, An application is made in a resistor-capacitor coupling (RC) detection device, the RRC detection device comprising a first electrode, a second electrode, and a signal detection and acquisition unit, wherein the first electrode and the second electrode are spaced apart by a preset distance, and the signal detection and acquisition unit is connected to both the first electrode and the second electrode; the method includes: The RC coupling detection device is set up within a preset range of the conductor under test. The first electrode is close to the conductor under test, and the second electrode is far away from the conductor under test and grounded. The time-domain voltage signal of the conductor under test is acquired by the signal detection and acquisition unit, and the time-domain voltage signal is converted into an initial frequency domain signal. Based on the RC coupling voltage divider model corresponding to the RC coupling detection device, voltage compensation parameters are obtained; the voltage compensation parameters include amplitude compensation parameters and phase compensation parameters; the RC coupling voltage divider model includes the equivalent resistance of the insulation layer of the conductor under test, and the equivalent resistance of the insulation layer is determined based on the resistivity of the insulation layer, the outer diameter of the insulation layer of the conductor under test, the diameter of the conductor under test, and the coupling length; Based on the amplitude compensation parameters and the phase compensation parameters, compensation processing is performed on each frequency component of the initial frequency domain signal to determine the target amplitude and target phase of each harmonic component of the conductor under test.

2. The method according to claim 1, characterized in that, The voltage compensation parameters include amplitude compensation parameters and phase compensation parameters corresponding to each frequency component. The step of compensating each frequency component of the initial frequency domain signal based on the amplitude compensation parameters and the phase compensation parameters to determine the target amplitude and target phase of each harmonic component of the conductor under test includes: For each frequency component of the initial frequency domain signal, amplitude compensation processing is performed on the frequency component based on the amplitude compensation parameter corresponding to the frequency component to determine the target amplitude of the harmonic component corresponding to the frequency component. Based on the phase compensation parameters corresponding to the frequency components, phase compensation processing is performed on the frequency components to determine the target phase of the harmonic components corresponding to the frequency components.

3. The method according to claim 1 or 2, characterized in that, The RC coupling voltage divider model includes the conductor under test, the equivalent resistance of the insulating layer, the first equivalent capacitance of the first electrode to the conductor under test, the second equivalent capacitance of the first electrode to ground, the third equivalent capacitance of the first electrode and the second electrode, and the first electrode and the second electrode. The conductor under test is connected to the first end of the first electrode in sequence through the equivalent resistance of the insulating layer and the first equivalent capacitance. The second end of the first electrode is connected to the first end of the second electrode through the third equivalent capacitance. The second end of the second electrode is grounded. The first end of the second equivalent capacitance is connected to the first end of the first electrode. The second end of the second equivalent capacitance is grounded.

4. The method according to claim 3, characterized in that, The step of obtaining voltage compensation parameters based on the RC coupling voltage divider model corresponding to the RC coupling detection device includes: The voltage compensation parameters are determined based on the equivalent resistance of the insulating layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance, and each frequency component of the initial frequency domain signal.

5. The method according to claim 4, characterized in that, The voltage compensation parameters include amplitude compensation parameters and phase compensation parameters corresponding to each of the frequency components. Determining the voltage compensation parameters based on the equivalent resistance of the insulating layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance, and each frequency component of the initial frequency domain signal includes: For each frequency component, the impedance mode corresponding to the frequency component is determined based on the equivalent resistance of the insulating layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance, and the frequency component. The amplitude compensation parameter corresponding to the frequency component is then determined based on the impedance mode corresponding to the frequency component. Based on the equivalent resistance of the insulating layer, the first equivalent capacitance, the second equivalent capacitance, the third equivalent capacitance, and the frequency component, the complex frequency domain transfer function corresponding to the frequency component is determined, and based on the complex frequency domain transfer function, the phase compensation parameter corresponding to the frequency component is determined.

6. The method according to claim 3, characterized in that, The first electrode is a spherical electrode, the second electrode is a flat plate electrode, and the method further includes: The second equivalent capacitance is determined based on the vacuum permittivity, the relative permittivity of the medium, and the radius of the ball electrode. The third equivalent capacitance is determined based on the vacuum dielectric constant, the relative dielectric constant of the medium, the radius of the sphere electrode, and the closest distance from the sphere electrode to the plate electrode. The first equivalent capacitance is determined based on the equivalent resistance of the insulation layer, the second equivalent capacitance, the third equivalent capacitance, the actual fundamental voltage of the conductor under test, and the measured fundamental voltage of the conductor under test.

7. A non-contact live-line detection device, characterized in that, An RC coupling detection device is used, comprising a first electrode, a second electrode, and a signal detection and acquisition unit. The first electrode and the second electrode are spaced apart by a preset distance, and the signal detection and acquisition unit is connected to both the first electrode and the second electrode. The device includes: The signal acquisition module is used to set up the RC coupling detection device within a preset range of the conductor under test. The first electrode is close to the conductor under test, and the second electrode is far away from the conductor under test and grounded. The signal detection and acquisition unit acquires the time-domain voltage signal of the conductor under test and converts the time-domain voltage signal into an initial frequency-domain signal. The parameter acquisition module is used to acquire voltage compensation parameters based on the RC coupling voltage divider model corresponding to the RC coupling detection device; the voltage compensation parameters include amplitude compensation parameters and phase compensation parameters; the RC coupling voltage divider model includes the equivalent resistance of the insulation layer of the conductor under test, and the equivalent resistance of the insulation layer is determined based on the resistivity of the insulation layer, the outer diameter of the insulation layer of the conductor under test, the diameter of the conductor under test, and the coupling length; The harmonic compensation module is used to perform compensation processing on each frequency component of the initial frequency domain signal based on the amplitude compensation parameters and the phase compensation parameters, and to determine the target amplitude and target phase of each harmonic component of the conductor under test.

8. 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 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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