Method and system for discriminating dancing conductors of transmission lines based on ground wire electromagnetic signals

Abstract

The present application proposes a method and system for discriminating dancing conductors of a transmission line based on ground wire electromagnetic signals. The method includes: acquiring electromagnetic signals on two ground wires in a single-circuit transmission line; performing spectral analysis on the electromagnetic signals to determine the number of groups of dancing frequency components in the electromagnetic signals and the phases of each dancing frequency component within the group; judging the dancing conductors in the transmission line according to the number of groups and the phases of each dancing frequency component; wherein, the electromagnetic signals include: the induced current on the per-pole grounded ground wire and the voltage across both ends of the insulator of the section-insulated ground wire. The technical solution proposed by the present application can determine which specific conductors are dancing, making the dancing monitoring technology based on ground wire electromagnetic signals more precise and enabling the operation and maintenance personnel to have a more specific understanding of the dancing situation of the line.

Description

Technical Field

[0001] The present application relates to the field of high voltage, and in particular to a method and system for identifying dancing conductors in power transmission lines based on ground wire electromagnetic signals. Background Art

[0002] Transmission lines are an important part of the power grid, and transmission line failures are the main cause of power grid failures. In recent years, overhead transmission line galloping accidents have occurred frequently in my country, with a wide range of impact and heavy losses. At the end of January 2018, 88 lines in one region alone galloped and 17 lines tripped as a result. Online monitoring of transmission line galloping is an important part of the prevention and control of transmission line galloping. At present, the galloping monitoring technology mainly includes wire contact galloping monitoring devices represented by displacement / acceleration sensors and Beidou positioning terminals, and non-contact optical galloping monitoring devices based on video monitoring. However, the contact wire galloping monitoring device needs to be installed with power off or live operation, which is easy to wear and tear, and the operation and maintenance are very inconvenient. In addition, multiple sets of devices need to be deployed in a large span to take into account the monitoring of galloping characteristics of different half-wave numbers, and the comprehensive cost is high; and the non-contact optical galloping monitoring device based on video monitoring is often affected by bad weather during the galloping period, and cannot monitor the conductor galloping characteristics well.

[0003] The existing technology proposes a scheme based on the electromagnetic coupling of the ground wire to monitor the galloping of the transmission line (i.e., monitoring the line galloping by monitoring the electromagnetic signal of the ground wire), which has the significant advantages of easy installation and maintenance, large monitoring range, and no influence from bad weather. However, it can only determine which gear is galloping, but cannot determine which specific conductor is galloping. Summary of the invention

[0004] The present application provides a method and system for identifying dancing conductors in a power transmission line based on ground wire electromagnetic signals, so as to at least solve the technical problem of being unable to identify which conductor is dancing.

[0005] The first embodiment of the present application provides a method for identifying a dancing conductor of a power transmission line based on a ground wire electromagnetic signal, the method comprising:

[0006] Obtain electromagnetic signals on two ground wires in a single-circuit transmission line;

[0007] Performing spectrum analysis on the electromagnetic signal to determine the number of groups of dancing frequency components in the electromagnetic signal and the phase of each dancing frequency component in the group;

[0008] Determining the dancing conductor in the power transmission line according to the group number and the phase of each dancing frequency component;

[0009] The electromagnetic signal includes: an induced current on the base-by-base ground wire and a voltage across the insulator of the segmented insulation ground wire.

[0010] Preferably, judging the dancing conductor in the transmission line according to the number of groups and the phases of the respective dancing frequency components includes:

[0011] If the number of groups of the dancing frequency components in the electromagnetic signal is 1 or 2, then judge the dancing conductor in the transmission line based on the phase of the frequency component, the phase of the characteristic dancing frequency when the A-phase conductor is dancing preset, the phase of the characteristic dancing frequency when the B-phase conductor is dancing preset, and the phase of the characteristic dancing frequency when the C-phase conductor is dancing preset;

[0012] If the number of groups of the dancing frequency components in the electromagnetic signal is 3, then the A, B, and C phase conductors in the transmission line are all dancing conductors.

[0013] Further, the phase of the characteristic dancing frequency when the preset A-phase conductor is dancing is -31°;

[0014] The phase of the characteristic dancing frequency when the preset B-phase conductor is dancing is 89°;

[0015] The phase of the characteristic dancing frequency when the preset C-phase conductor is dancing is -151°.

[0016] Further, if the number of groups of the dancing frequency components in the electromagnetic signal is 1 or 2, then judging the dancing conductor in the transmission line based on the phase of the frequency component, the phase of the characteristic dancing frequency when the A-phase conductor is dancing preset, the phase of the characteristic dancing frequency when the B-phase conductor is dancing preset, and the phase of the characteristic dancing frequency when the C-phase conductor is dancing preset includes:

[0017] When the number of groups of the dancing frequency components in the electromagnetic signal is 1:

[0018] If the phase of the dancing frequency component is the same as the phase of the characteristic dancing frequency when the preset A-phase conductor is dancing, or the phase of the characteristic dancing frequency when the preset B-phase conductor is dancing, or the phase of the characteristic dancing frequency when the preset C-phase conductor is dancing, then determine that the dancing conductor in the transmission line is the conductor corresponding to the phase of the dancing frequency component as the dancing conductor; otherwise, determine the dancing conductor in the transmission line based on the first scheme;

[0019] When the number of groups of the dancing frequency components in the electromagnetic signal is 2:

[0020] Respectively determine whether the phase of each dancing frequency component is the same as any of the phases of the characteristic dancing frequency when the preset A-phase conductor is dancing, the characteristic dancing frequency when the B-phase conductor is dancing preset, and the characteristic dancing frequency when the C-phase conductor is dancing preset;

[0021] If the phases of the two groups of dancing frequency components are the same as the phases of the preset dancing characteristic frequency of the A-phase conductor when it is dancing and the phases of the preset dancing characteristic frequency of the B-phase conductor when it is dancing, it is determined that the dancing conductors in the power transmission line are the A-phase conductor and the B-phase conductor;

[0022] If the phases of the two groups of dancing frequency components are the same as the phases of the preset dancing characteristic frequency of the A-phase conductor when it is dancing and the phases of the preset dancing characteristic frequency of the C-phase conductor when it is dancing, it is determined that the dancing conductors in the power transmission line are the A-phase conductor and the C-phase conductor;

[0023] If the phases of the two groups of dancing frequency components are the same as the phases of the preset dancing characteristic frequency of the B-phase conductor when it is dancing and the phases of the preset dancing characteristic frequency of the C-phase conductor when it is dancing, it is determined that the dancing conductors in the power transmission line are the B-phase conductor and the C-phase conductor;

[0024] Otherwise, it is determined that the three-phase conductors A, B, and C in the transmission line are all dancing conductors, and the dancing frequencies of two of the conductors are the same.

[0025] Furthermore, the first solution includes:

[0026] Step F1: For the mth time, assume that the i-phase conductor and the j-phase conductor in the transmission line are dancing conductors, and solve equation 1: Get the dancing amplitude Api of the i-phase conductor and the dancing amplitude Apj of the j-phase conductor;

[0027] Step F2: Substitute the dancing amplitude of the i-phase conductor and the dancing amplitude of the j-phase conductor into equation 2: In the process, determine whether the equation of equation 2 is established. If it is established, go to step F3. Otherwise, set m=m+1 and return to step F1 until m+1 is greater than 3, and then go to step F4.

[0028] Step F3: the i-phase conductor and the j-phase conductor in the power transmission line are dancing conductors, and the dancing frequencies of the i-phase conductor and the j-phase conductor are the same;

[0029] Step F4: The three-phase conductors A, B, and C in the power transmission line are all dancing conductors, and the dancing frequencies of the three-phase conductors A, B, and C are the same;

[0030] Among them, k i is the mapping coefficient of the i-th phase conductor galloping amplitude to the amplitude of the characteristic frequency component of the grounding line on a base-by-base basis when only the i-th phase conductor gallops, k jis the mapping coefficient from the amplitude of the galloping of the j - phase conductor to the amplitude of the characteristic frequency component of the per - tower grounded overhead ground wire when only the j - phase conductor gallops. F is the phase of the characteristic frequency component of galloping on the per - tower grounded overhead ground wire when only the j - phase conductor gallops. D is the phase of the characteristic frequency component of galloping on the per - tower grounded overhead ground wire when only the i - phase conductor gallops. f0 is the amplitude of the characteristic frequency component of galloping monitored on the per - tower grounded overhead ground wire. is the phase of the characteristic frequency component of galloping monitored on the per - tower grounded overhead ground wire, i ∈ [A, B, C], j ∈ [A, B, C], i ≠ j, k i ′ is the mapping coefficient from the amplitude of the galloping of the i - phase conductor to the amplitude of the characteristic frequency component of the section - insulated overhead ground wire when only the i - phase conductor gallops. G is the phase of the characteristic frequency component of galloping on the section - insulated overhead ground wire when only the i - phase conductor gallops. k j ′ is the mapping coefficient from the amplitude of the galloping of the j - phase conductor to the amplitude of the characteristic frequency component of the section - insulated overhead ground wire when only the j - phase conductor gallops. H is the phase of the characteristic frequency component of galloping on the section - insulated overhead ground wire when only the j - phase conductor gallops. f1 is the amplitude of the characteristic frequency component of galloping monitored on the section - insulated overhead ground wire. is the phase of the characteristic frequency component of galloping monitored on the section - insulated overhead ground wire.

[0031] The second - aspect embodiment of the present application proposes a transmission - line galloping conductor discrimination system based on the electromagnetic signals of the overhead ground wire, including:

[0032] An acquisition module, configured to acquire the electromagnetic signals on two overhead ground wires in a single - circuit transmission line;

[0033] A determination module, configured to perform spectrum analysis on the electromagnetic signals to determine the number of groups of galloping frequency components in the electromagnetic signals and the phase of each galloping frequency component within the group;

[0034] A judgment module, configured to judge the galloping conductor in the transmission line according to the number of groups and the phase of each galloping frequency component;

[0035] Wherein, the electromagnetic signals include: the induced current on the per - tower grounded overhead ground wire and the voltage across the insulator at both ends of the section - insulated overhead ground wire.

[0036] Preferably, the judgment module includes:

[0037] A first judgment unit, configured to, if the number of groups of galloping frequency components in the electromagnetic signals is 1 or 2, judge the galloping conductor in the transmission line based on the phase of the frequency components, the phase of the characteristic frequency of galloping when the A - phase conductor gallops, the phase of the characteristic frequency of galloping when the B - phase conductor gallops, and the phase of the characteristic frequency of galloping when the C - phase conductor gallops;

[0038] A second determination unit, configured to, if the number of groups of dancing frequency components in the electromagnetic signal is 3, determine that the A, B, and C phase conductors in the transmission line are all dancing conductors.

[0039] Further, the phase of the dancing characteristic frequency when the preset A-phase conductor is dancing is -31°;

[0040] The phase of the dancing characteristic frequency when the preset B-phase conductor is dancing is 89°;

[0041] The phase of the dancing characteristic frequency when the preset C-phase conductor is dancing is -151°.

[0042] Further, the first determination unit is further configured to:

[0043] When the number of groups of dancing frequency components in the electromagnetic signal is 1:

[0044] If the phase of the dancing frequency component is the same as the phase of the dancing characteristic frequency when the preset A-phase conductor is dancing, or the phase of the dancing characteristic frequency when the preset B-phase conductor is dancing, or the phase of the dancing characteristic frequency when the preset C-phase conductor is dancing, it is determined that the dancing conductor in the transmission line is the conductor corresponding to the phase of the dancing frequency component; otherwise, the dancing conductor in the transmission line is determined based on the first solution;

[0045] When the number of groups of dancing frequency components in the electromagnetic signal is 2:

[0046] Respectively determine whether the phase of each dancing frequency component is the same as any phase of the phase of the dancing characteristic frequency when the preset A-phase conductor is dancing, the phase of the dancing characteristic frequency when the preset B-phase conductor is dancing, and the phase of the dancing characteristic frequency when the preset C-phase conductor is dancing;

[0047] If the phases of 2 groups of dancing frequency components are the same as the phase of the dancing characteristic frequency when the preset A-phase conductor is dancing and the phase of the dancing characteristic frequency when the preset B-phase conductor is dancing, it is determined that the dancing conductors in the transmission line are the A-phase conductor and the B-phase conductor;

[0048] If the phases of 2 groups of dancing frequency components are the same as the phase of the dancing characteristic frequency when the preset A-phase conductor is dancing and the phase of the dancing characteristic frequency when the preset C-phase conductor is dancing, it is determined that the dancing conductors in the transmission line are the A-phase conductor and the C-phase conductor;

[0049] If the phases of 2 groups of dancing frequency components are the same as the phase of the dancing characteristic frequency when the preset B-phase conductor is dancing and the phase of the dancing characteristic frequency when the preset C-phase conductor is dancing, it is determined that the dancing conductors in the transmission line are the B-phase conductor and the C-phase conductor;

[0050] Otherwise, it is determined that the three-phase conductors A, B, and C in the transmission line are all dancing conductors, and the dancing frequencies of two conductors are the same.

[0051] Further, the first solution includes:

[0052] Step H1: Assume for the m-th time that the i-phase conductor and the j-phase conductor in the transmission line are dancing conductors, and solve Equation 1: Obtain the dancing amplitude Api of the i-phase conductor and the dancing amplitude Apj of the j-phase conductor;

[0053] Step H2: Substitute the dancing amplitude of the i-phase conductor and the dancing amplitude of the j-phase conductor into Equation 2: Judge whether the equation of Equation 2 holds. If it holds, go to Step H3. Otherwise, let m = m + 1, and return to Step F1 until m + 1 is greater than 3, then go to Step H4;

[0054] Step H3: The i-phase conductor and the j-phase conductor in the transmission line are dancing conductors, and the dancing frequencies of the i-phase conductor and the j-phase conductor are the same;

[0055] Step H4: The three-phase conductors A, B, and C in the transmission line are all dancing conductors, and the dancing frequencies of the three-phase conductors A, B, and C are the same;

[0056] where k i is the mapping coefficient from the dancing amplitude of the i-phase conductor to the amplitude of the characteristic frequency component of the per-basis grounded overhead ground wire when only the i-phase conductor is dancing, k j is the mapping coefficient from the dancing amplitude of the j-phase conductor to the amplitude of the characteristic frequency component of the per-basis grounded overhead ground wire when only the j-phase conductor is dancing, F is the phase of the dancing characteristic frequency component on the per-basis grounded overhead ground wire when only the j-phase conductor is dancing, D is the phase of the dancing characteristic frequency component on the per-basis grounded overhead ground wire when only the i-phase conductor is dancing, f0 is the amplitude of the dancing characteristic frequency component monitored on the per-basis grounded overhead ground wire, is the phase of the dancing characteristic frequency component monitored on the per-basis grounded overhead ground wire, i ∈ [A, B, C], j ∈ [A, B, C], i ≠ j, k i ′ is the mapping coefficient from the dancing amplitude of the i-phase conductor to the amplitude of the characteristic frequency component of the sectional insulated overhead ground wire when only the i-phase conductor is dancing, G is the phase of the dancing characteristic frequency component on the sectional insulated overhead ground wire when only the i-phase conductor is dancing, k j ′is the mapping coefficient of the j-th phase conductor galloping amplitude to the segmented insulated ground wire characteristic frequency component amplitude when only the j-th phase conductor gallops, H is the preset phase of the galloping characteristic frequency component on the segmented insulated ground wire when only the j-th phase conductor gallops, f1 is the amplitude of the galloping characteristic frequency component monitored on the segmented insulated ground wire, It is the phase of the dancing characteristic frequency component monitored on the segmented insulated ground wire.

[0057] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in the first aspect is implemented.

[0058] The fourth aspect of the present application provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method described in the first aspect of the present application is implemented. The technical solution provided by the embodiment of the present application brings at least the following beneficial effects:

[0059] The present application proposes a method and system for identifying dancing conductors in a power transmission line based on ground wire electromagnetic signals, wherein the method comprises: obtaining electromagnetic signals on two ground wires in a single-circuit power transmission line; performing spectrum analysis on the electromagnetic signals to determine the number of groups of dancing frequency components in the electromagnetic signals and the phases of each dancing frequency component in the group; judging the dancing conductors in the transmission line according to the number of groups and the phases of each dancing frequency component; wherein the electromagnetic signals comprise: the induced current on the base-by-base ground wires and the voltage across the insulators of the segmented insulated ground wires. The technical solution proposed in the present application can determine which conductors are dancing, making the dancing monitoring technology based on ground wire electromagnetic signals more sophisticated, and enabling operation and maintenance personnel to have a more specific grasp of the line dancing situation.

[0060] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0062] Figure 1 A flowchart of a method for identifying a dancing conductor of a power transmission line based on a ground wire electromagnetic signal according to an embodiment of the present application;

[0063] Figure 2 A detailed flow chart of a method for identifying dancing conductors in a power transmission line based on ground wire electromagnetic signals according to an embodiment of the present application;

[0064] Figure 3 A phase diagram of a characteristic frequency component of a ground line when different conductors are dancing at different frequencies when only one conductor is dancing according to an embodiment of the present application;

[0065] Figure 4 A phase diagram of a characteristic frequency component of a ground line when different wires dance with different amplitudes when only one wire dances according to an embodiment of the present application;

[0066] Figure 5 A schematic diagram of introducing two sets of frequency components when two wires are dancing at different frequencies according to an embodiment of the present application;

[0067] Figure 6 A schematic diagram of frequency component vector superposition when the dancing frequencies of two wires are the same according to an embodiment of the present application;

[0068] Figure 7 A structural diagram of a transmission line dancing conductor identification system based on ground wire electromagnetic signals according to an embodiment of the present application;

[0069] Figure 8 The figure is a structural diagram of a judgment module provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0070] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0071] The present application proposes a method and system for identifying dancing conductors in a power transmission line based on ground wire electromagnetic signals, wherein the method comprises: obtaining electromagnetic signals on two ground wires in a single-circuit power transmission line; performing spectrum analysis on the electromagnetic signals to determine the number of groups of dancing frequency components in the electromagnetic signals and the phases of each dancing frequency component in the group; judging the dancing conductors in the transmission line according to the number of groups and the phases of each dancing frequency component; wherein the electromagnetic signals include: the induced current on the ground wires one by one and the voltage across the insulators of the segmented insulated ground wires. The technical solution proposed in the present application can determine which conductors are dancing, making the dancing monitoring technology based on ground wire electromagnetic signals more sophisticated, and enabling operation and maintenance personnel to have a more specific grasp of the line dancing situation.

[0072] The following describes a method and system for identifying dancing conductors in a power transmission line based on ground wire electromagnetic signals according to an embodiment of the present application with reference to the accompanying drawings.

[0073] Embodiment 1

[0074] Figure 1 As shown in the flowchart of a method for discriminating dancing conductors of a transmission line based on ground wire electromagnetic signals provided by an embodiment of the present application, as Figure 1 shown, the method includes:

[0075] Step 1: Obtain the electromagnetic signals on two ground wires in a single-circuit transmission line, where the electromagnetic signals include: the induced current on the per-pole grounded ground wire and the voltage across both ends of the insulator of the section-insulated ground wire.

[0076] It should be noted that for a single-circuit transmission line, let the three-phase currents of A, B, and C be respectively:

[0077]

[0078] In the formula, I A is the current of phase A, I B is the current of phase B, I C is the current of phase C, and I0 is the effective value of the conductor current.

[0079] It should be noted that when the conductors of the line are dancing, the position of the conductors in the vertical direction will change periodically, and thus the mutual inductance between the conductors and the ground wires will change periodically. When the line current is constant, the induced voltage and induced current on the ground wires will also change periodically.

[0080] An electric current transformer can be installed on the ground wire to monitor the induced current on the per-pole grounded ground wire; or a voltage sensor can be installed across both ends of the insulator of the ground wire to monitor the voltage across both ends of the insulator of the section-insulated ground wire. That is, by arranging voltage or current monitoring devices, the induced voltage or induced current on the ground wire can be detected in real time.

[0081] Step 2: Perform a spectral analysis on the electromagnetic signals to determine the number of groups of dancing frequency components in the electromagnetic signals and the phases of the dancing frequency components within each group.

[0082] It should be noted that by obtaining the induced voltage or induced current on the ground wire, a spectral analysis is performed on the induced voltage or induced current.

[0083] Through spectral analysis of the induced current and voltage and multiple simulations, it can be obtained that:

[0084] When the conductors are dancing, the induced signals on the ground wires will be superimposed with corresponding frequency components of 50 ± c Hz. f c is the frequency of conductor dancing. This feature is relatively obvious and is relatively easy to implement in identification, and can be used as the basis for monitoring conductor dancing.

[0085] If the electromagnetic signal detects abnormal frequency components, that is, when the ground wire induced voltage or induced current couples out the galloping frequency components, where the galloping frequency components are additional low-frequency components coupled on the basis of the power-frequency electromagnetic induction signal when the position of the wire changes in the vertical direction.

[0086] If no abnormal frequency signal is detected in the circuit parameters, continue to monitor the electromagnetic signal of the ground wire in real time.

[0087] It should be noted that the electromagnetic signal induced on the ground wire will have corresponding frequency components of 50±f c Hz, where f c is the frequency of the wire galloping. That is to say, if galloping occurs, two non-fundamental frequency components significantly higher than other frequencies will be detected during monitoring. The two important parameters of the frequency components are amplitude and phase. Therefore, the phase of the galloping frequency component refers to the phase of calculating the frequency component of 50±f c Hz.

[0088] Step 3: Determine the galloping wire in the transmission line according to the number of groups and the phase of each galloping frequency component.

[0089] In the embodiment of the present disclosure, the specific content of the step 3 includes:

[0090] 3-1: If the number of groups of the galloping frequency components in the electromagnetic signal is 1 or 2, determine the galloping wire in the transmission line based on the phase of the frequency components, the phase of the characteristic frequency of the A-phase wire galloping preset, the phase of the characteristic frequency of the B-phase wire galloping preset, and the phase of the characteristic frequency of the C-phase wire galloping preset;

[0091] Among them, the phase of the characteristic frequency of the A-phase wire galloping preset is -31°;

[0092] The phase of the characteristic frequency of the B-phase wire galloping preset is 89°;

[0093] The phase of the characteristic frequency of the C-phase wire galloping preset is -151°.

[0094] Further, when the number of groups of the galloping frequency components in the electromagnetic signal is 1:

[0095] If the phase of the galloping frequency component is the same as the phase of the characteristic frequency of the A-phase wire galloping preset, or the phase of the characteristic frequency of the B-phase wire galloping preset, or the phase of the characteristic frequency of the C-phase wire galloping preset, it is determined that the galloping wire in the transmission line is the wire corresponding to the phase of the galloping frequency component. Otherwise, determine the galloping wire in the transmission line based on the first scheme;

[0096] It should be noted that the first solution includes:

[0097] Step F1: Assume that the i-phase wire and the j-phase wire in the transmission line are dancing wires for the m-th time, and solve Equation 1: Obtain the dancing amplitude Api of the i-phase wire and the dancing amplitude Apj of the j-phase wire;

[0098] Step F2: Substitute the dancing amplitude of the i-phase wire and the dancing amplitude of the j-phase wire into Equation 2: Judge whether the equality of Equation 2 holds. If it holds, go to Step F3; otherwise, let m = m + 1 and return to Step F1 until m + 1 is greater than 3, and then go to Step F4;

[0099] Step F3: The i-phase wire and the j-phase wire in the transmission line are dancing wires, and the dancing frequencies of the i-phase wire and the j-phase wire are the same;

[0100] Step F4: The A-phase, B-phase, and C-phase wires in the transmission line are all dancing wires, and the dancing frequencies of the A-phase, B-phase, and C-phase wires are the same;

[0101] where k i is the mapping coefficient from the dancing amplitude of the i-phase wire to the amplitude of the characteristic frequency component of the per-basis grounded overhead ground wire when only the i-phase wire is dancing, k j is the mapping coefficient from the dancing amplitude of the j-phase wire to the amplitude of the characteristic frequency component of the per-basis grounded overhead ground wire when only the j-phase wire is dancing, F is the phase of the dancing characteristic frequency component on the per-basis grounded overhead ground wire when only the j-phase wire is dancing, D is the phase of the dancing characteristic frequency component on the per-basis grounded overhead ground wire when only the i-phase wire is dancing, f0 is the amplitude of the dancing characteristic frequency component monitored on the per-basis grounded overhead ground wire, is the phase of the dancing characteristic frequency component monitored on the per-basis grounded overhead ground wire, i ∈ [A, B, C], j ∈ [A, B, C], i ≠ j, k i ′ is the mapping coefficient from the dancing amplitude of the i-phase wire to the amplitude of the characteristic frequency component of the sectional insulated overhead ground wire when only the i-phase wire is dancing, G is the phase of the dancing characteristic frequency component on the sectional insulated overhead ground wire when only the i-phase wire is dancing, k j ′ is the mapping coefficient from the dancing amplitude of the j-phase wire to the amplitude of the characteristic frequency component of the sectional insulated overhead ground wire when only the j-phase wire is dancing, H is the phase of the dancing characteristic frequency component on the sectional insulated overhead ground wire when only the j-phase wire is dancing, f1 is the amplitude of the dancing characteristic frequency component monitored on the sectional insulated overhead ground wire, is the phase of the dancing characteristic frequency component monitored on the sectional insulated overhead ground wire.

[0102] It should be noted that if the hypothesis holds, the galloping amplitudes of the two conductors are calculated.

[0103] Among them, the determination of the galloping amplitude includes:

[0104] The galloping amplitude decays exponentially along the line. For a fixed line, the parameters in the exponential decay expression are certain. After obtaining the galloping interval, the galloping amplitude can be determined according to the mathematical expression.

[0105] When the number of groups of galloping frequency components in the electromagnetic signal is 2:

[0106] Respectively determine whether the phases of each of the galloping frequency components are the same as any of the phases of the galloping characteristic frequency when the preset phase of the A-phase conductor gallops, the preset phase of the B-phase conductor gallops, and the preset phase of the C-phase conductor gallops;

[0107] If the phases of the 2 groups of galloping frequency components are the same as the phase of the galloping characteristic frequency when the preset A-phase conductor gallops and the phase of the galloping characteristic frequency when the preset B-phase conductor gallops, it is determined that the galloping conductors in the transmission line are the A-phase conductor and the B-phase conductor;

[0108] If the phases of the 2 groups of galloping frequency components are the same as the phase of the galloping characteristic frequency when the preset A-phase conductor gallops and the phase of the galloping characteristic frequency when the preset C-phase conductor gallops, it is determined that the galloping conductors in the transmission line are the A-phase conductor and the C-phase conductor;

[0109] If the phases of the 2 groups of galloping frequency components are the same as the phase of the galloping characteristic frequency when the preset B-phase conductor gallops and the phase of the galloping characteristic frequency when the preset C-phase conductor gallops, it is determined that the galloping conductors in the transmission line are the B-phase conductor and the C-phase conductor;

[0110] Otherwise, it is determined that the A, B, and C phase conductors in the transmission line are all galloping conductors, and the galloping frequencies of two conductors are the same.

[0111] 3-2: If the number of groups of galloping frequency components in the electromagnetic signal is 3, then the A, B, and C phase conductors in the transmission line are all galloping conductors.

[0112] The method provided by the embodiments of the present disclosure is described in detail as Figure 2 shown:

[0113] Obtain the overhead line structure. A total of 25 spans of transmission lines are set, and the galloping span is located at the 13th span.

[0114] (1) For the case where only one conductor gallops, the phases of the galloping characteristic frequency components of the ground wire at the galloping span are simulated and calculated respectively under different galloping frequencies and different galloping amplitudes when each of the A, B, and C phase conductors gallops. Taking the galloping characteristic frequency components on the induced current of the tower-by-tower grounded ground wire as an example, the results are as Figure 3 and Figure 4 shown. When only one conductor gallops, regardless of the frequency and amplitude of the conductor galloping, the phase of the galloping frequency component in the electromagnetic signal of the ground wire is only related to which conductor gallops. That is, in this example, when only the A-phase conductor gallops, the phase of the galloping characteristic frequency in the induced current on the tower-by-tower grounded ground wire is about -31°; when only the B-phase conductor gallops, the phase of the galloping characteristic frequency in the induced current on the tower-by-tower grounded ground wire is about 89°; when only the C-phase conductor gallops, the phase of the galloping characteristic frequency in the induced current on the tower-by-tower grounded ground wire is about -151°. Therefore, in the case where only one conductor gallops, the mapping from the phase of the galloping characteristic frequency component to the galloping conductor can be realized, and then the discrimination of the galloping conductor can be realized. For the galloping characteristic frequency components in the induced voltage of the sectional insulated ground wire, the above conclusion still holds, but the phases of the characteristic frequency components corresponding to the galloping of different conductors are different.

[0115] (2) When two of the three-phase conductors gallop, it is discussed in two cases: one is that the galloping frequencies of the two conductors are different, and the other is that the galloping frequencies of the two conductors are the same. When the galloping frequencies of the two conductors are different, two different additional frequency components will be coupled in the induced voltage or current of the ground wire, as Figure 5 shown (taking the induced current of the tower-by-tower grounded ground wire when the galloping frequency of the A-phase conductor is 1 Hz and the galloping frequency of the C-phase conductor is 1.5 Hz as an example). At this time, the conclusion when only one conductor gallops can be combined, and according to the phases of these two different frequency components, it can be judged which two conductors gallop. When the galloping frequencies of the two conductors are the same, there is only one galloping frequency component on the ground wire, and it needs to be distinguished from the case where only one conductor gallops. The amplitudes and phases of the galloping frequency components in the induced current of the ground wire in different specific cases are calculated as shown in Table 1. According to the calculation results, it can be seen that when the galloping frequencies of the two conductors are the same, the total galloping frequency component in the ground wire satisfies the linear vector superposition of the galloping frequency components introduced when each of the two conductors gallops, and the phases of the galloping frequency components introduced when each gallops satisfy Figure 3 and Figure 4 the corresponding rules, and the specific schematic diagram is as Figure 6 shown.

[0116] The amplitudes and phases of the galloping characteristic frequency components in the induced current of the ground wire in different cases where two conductors gallop at the same frequency are shown in Table 1:

[0117] Table 1

[0118] As described above, it can be summarized that when the phase-A conductor and the phase-B conductor oscillate at the same frequency, the phase of the characteristic frequency component on the tower-by-tower grounded overhead ground wire is between -31° and 89° (and far from -31° and 89°); when the phase-A conductor and the phase-C conductor oscillate at the same frequency, the phase of the characteristic frequency component on the tower-by-tower grounded overhead ground wire is between -31° and -151°; when the phase-B conductor and the phase-C conductor oscillate at the same frequency, the phase of the characteristic frequency component on the tower-by-tower grounded overhead ground wire is between -151° and -89°. Therefore, decoupling of the characteristic frequency component of the overhead ground wire to the oscillating conductors can be achieved in this case. Taking the two oscillating conductors as the phase-A conductor and the phase-B conductor as an example (i.e., the phase of the characteristic frequency component on the tower-by-tower grounded overhead ground wire is monitored to be between -31° and 89°), the specific method is described. Let the amplitude of the oscillation of the phase-A conductor be Apa, the amplitude of the oscillation of the phase-B conductor be Apb, the amplitude of the monitored oscillation characteristic frequency component on the tower-by-tower grounded overhead ground wire be f0, and the phase be

[0119] Then, decoupling of the phase of the oscillation characteristic frequency component to the oscillating conductors can be achieved by formulating the following equation (Equation 1):

[0120]

[0121] where k a and k b are known values, which refer to the mapping coefficients from the oscillation amplitude to the amplitude of the characteristic frequency component of the tower-by-tower grounded overhead ground wire when the phase-A and phase-B conductors oscillate respectively. According to the above scheme, not only can it be determined which two conductors are oscillating, but also the oscillation amplitude of each of the two conductors can be calculated.

[0122] (3) When all three-phase conductors are galloping, it is discussed in three cases. First, the galloping frequencies of the three conductors are different. In this case, three different frequency components will be coupled out in the electromagnetic signal of the ground wire, and it can be automatically recognized that three conductors are galloping. Second, among the galloping frequencies of the three conductors, one is different from the other two. At this time, it is necessary to distinguish this situation from the case of "only two conductors galloping but with different galloping frequencies". Distinguishing these two situations is relatively easy because when only two conductors gallop at different frequencies, the phase of the galloping frequency component of the induced current on the per-pole grounding wire will only appear near the three angles of -31°, 89°, and -151° (±5°). In the case of three conductors galloping and one galloping frequency being different from the other two, among the phases of the two galloping frequency components of the induced current on the per-pole grounding wire, there must be one that is more than 15° away from any of the three angles of -31°, 89°, and -151°. Third, the galloping frequencies of the three conductors are the same. At this time, it is necessary to distinguish this situation from the cases of only one conductor galloping and two conductors galloping at the same frequency. Calculate the phases of the galloping characteristic frequency components of the induced current on the per-pole grounding wire and the induced voltage on the sectional insulated ground wire when the three conductors gallop with different amplitudes, as shown in Table 2.

[0123] Table 2

[0124]

[0125] According to the calculation results, it can be seen that when the three conductors are galloping, the phase of the galloping characteristic frequency component on the induced current of the per-pole grounding wire is around 0°. Therefore, based on the phase characteristics, it can be well distinguished from the case of only one conductor galloping. However, the case of three conductors galloping at the same frequency will cause phase aliasing with the case of two conductors galloping at the same frequency. The following method can be used to solve this problem: After judging that it is not the case of only one conductor galloping, assume that only two conductors are galloping at this time, and set the amplitude of the galloping characteristic frequency component monitored on the per-pole grounding wire as f0 and the phase as The amplitude of the galloping characteristic frequency component monitored on the sectional insulated ground wire is f1 and the phase is If the phase of the dancing characteristic frequency component monitored by the base-to-base ground wire is between -31° and 89°, the two assumed dancing wires are considered to be phase A and phase B; if the phase of the dancing characteristic frequency component monitored by the base-to-base ground wire is between -31° and -151°, the two assumed dancing wires are considered to be phase A and phase C; if the phase of the dancing characteristic frequency component monitored by the base-to-base ground wire is between -151° and -89°, the two assumed dancing wires are considered to be phase B and phase C. The following is an example of the dancing characteristic frequency component monitored by the base-to-base ground wire being between -31° and 89°. At this time, the assumed dancing wires are phase A and phase B. The dancing amplitude of the phase A and phase B wires can be solved only based on the amplitude and phase of the dancing characteristic frequency component on the induced current of the base-to-base ground wire (that is, solving equation 1: Then, the obtained galloping amplitude is substituted into the expression for calculating the conductor galloping amplitude based on the galloping characteristic frequency component of the induced voltage on the segmented insulated ground wire (Equation 2):

[0126]

[0127] In the formula, k ′ a and k ′ b is a known value, which refers to the mapping coefficient of the dancing amplitude to the characteristic frequency component amplitude of the segmented insulated ground wire when the A and B phase conductors dance separately. If this expression still holds, it proves that the assumption holds. If this expression does not hold, it proves that the dancing situation is that the three-phase conductors dance at the same frequency. Then, it is necessary to jointly map the dancing characteristic frequency component monitored on the segmented insulated ground wire and the frequency component monitored on the base-to-base ground wire with the dancing amplitude (Equation 3) To solve the dancing of each phase conductor, where k c k is the mapping coefficient from the dancing amplitude to the characteristic frequency component amplitude of the grounding wire when the C phase conductor dances individually, ′ c It is the mapping coefficient from the dancing amplitude to the amplitude of the characteristic frequency component of the segmented insulated ground wire when the C phase conductor dances individually.

[0128] Based on the above scheme, it is possible to determine which wire or wires in the dancing file are dancing, making the results of the dancing monitoring scheme based on the ground wire electromagnetic signal more precise and allowing operation and maintenance personnel to have a more specific grasp of the line dancing situation.

[0129] In summary, the method for identifying dancing conductors of a power line based on ground wire electromagnetic signals proposed in this embodiment can accurately determine which conductors are dancing, making the dancing monitoring technology based on ground wire electromagnetic signals more sophisticated.

[0130] Embodiment 2

[0131] Figure 7 The structural diagram of a transmission line galloping conductor discrimination system based on ground wire electromagnetic signals provided according to an embodiment of the present application is as follows Figure 7 shown, the system includes:

[0132] An acquisition module 100, configured to acquire electromagnetic signals on two ground wires in a single - circuit transmission line;

[0133] A determination module 200, configured to perform spectral analysis on the electromagnetic signals to determine the number of groups of galloping frequency components in the electromagnetic signals and the phases of each galloping frequency component within the group;

[0134] A judgment module 300, configured to judge the galloping conductors in the transmission line according to the number of groups and the phases of each galloping frequency component;

[0135] Wherein, the electromagnetic signals include: the induced current on the phase - by - phase grounded ground wire and the voltage across both ends of the insulator of the section - insulated ground wire.

[0136] Preferably, as Figure 8 shown, the judgment module 300 includes:

[0137] A first judgment unit 301, configured to, if the number of groups of galloping frequency components in the electromagnetic signals is 1 or 2, judge the galloping conductors in the transmission line based on the phases of the frequency components, the phase of the galloping characteristic frequency when the A - phase conductor gallops, the phase of the galloping characteristic frequency when the B - phase conductor gallops, and the phase of the galloping characteristic frequency when the C - phase conductor gallops;

[0138] A second judgment unit 302, configured to, if the number of groups of galloping frequency components in the electromagnetic signals is 3, then the A, B, and C phase conductors in the transmission line are all galloping conductors.

[0139] Further, the phase of the galloping characteristic frequency when the preset A - phase conductor gallops is - 31°;

[0140] The phase of the galloping characteristic frequency when the preset B - phase conductor gallops is 89°;

[0141] The phase of the galloping characteristic frequency when the preset C - phase conductor gallops is - 151°.

[0142] Further, the first judgment unit 301 is further configured to:

[0143] When the number of groups of galloping frequency components in the electromagnetic signals is 1:

[0144] If the phase of the galloping frequency component is the same as the phase of the galloping characteristic frequency when the preset phase A conductor gallops, or the phase of the galloping characteristic frequency when the preset phase B conductor gallops, or the phase of the galloping characteristic frequency when the preset phase C conductor gallops, then it is determined that the galloping conductor in the transmission line is the conductor corresponding to the phase of the galloping frequency component. Otherwise, based on the first solution, determine the galloping conductor in the transmission line;

[0145] When the number of groups of galloping frequency components in the electromagnetic signal is 2:

[0146] Respectively determine whether the phase of each galloping frequency component is the same as any phase of the phase of the galloping characteristic frequency when the preset phase A conductor gallops, the phase of the galloping characteristic frequency when the preset phase B conductor gallops, and the phase of the galloping characteristic frequency when the preset phase C conductor gallops;

[0147] If the phases of the 2 groups of galloping frequency components are the same as the phase of the galloping characteristic frequency when the preset phase A conductor gallops and the phase of the galloping characteristic frequency when the preset phase B conductor gallops, then it is determined that the galloping conductors in the transmission line are the phase A conductor and the phase B conductor;

[0148] If the phases of the 2 groups of galloping frequency components are the same as the phase of the galloping characteristic frequency when the preset phase A conductor gallops and the phase of the galloping characteristic frequency when the preset phase C conductor gallops, then it is determined that the galloping conductors in the transmission line are the phase A conductor and the phase C conductor;

[0149] If the phases of the 2 groups of galloping frequency components are the same as the phase of the galloping characteristic frequency when the preset phase B conductor gallops and the phase of the galloping characteristic frequency when the preset phase C conductor gallops, then it is determined that the galloping conductors in the transmission line are the phase B conductor and the phase C conductor;

[0150] Otherwise, it is determined that the phase A, phase B, and phase C conductors in the transmission line are all galloping conductors, and the galloping frequencies of two conductors are the same.

[0151] Among them, the first solution includes:

[0152] Step H1: Assume for the mth time that the phase i conductor and the phase j conductor in the transmission line are galloping conductors, and solve Equation 1: Obtain the galloping amplitude Api of the phase i conductor and the galloping amplitude Apj of the phase j conductor;

[0153] Step H2: Substitute the galloping amplitude of the phase i conductor and the galloping amplitude of the phase j conductor into Equation 2: In it, determine whether the equation of Equation 2 holds. If it holds, proceed to step H3. Otherwise, let m = m + 1 and return to step F1 until m + 1 is greater than 3, then proceed to step H4;

[0154] Step H3: The i-phase conductor and the j-phase conductor in the transmission line are dancing conductors, and the dancing frequencies of the i-phase conductor and the j-phase conductor are the same;

[0155] Step H4: The A, B, and C phase conductors in the transmission line are all dancing conductors, and the dancing frequencies of the A, B, and C phase conductors are the same;

[0156] Among them, k i is the mapping coefficient from the dancing amplitude of the i-phase conductor to the amplitude of the characteristic frequency component of the per-basis grounded ground wire when only the i-phase conductor is dancing, k j is the mapping coefficient from the dancing amplitude of the j-phase conductor to the amplitude of the characteristic frequency component of the per-basis grounded ground wire when only the j-phase conductor is dancing, F is the phase of the dancing characteristic frequency component on the per-basis grounded ground wire when only the j-phase conductor is dancing, D is the phase of the dancing characteristic frequency component on the per-basis grounded ground wire when only the i-phase conductor is dancing, f0 is the amplitude of the dancing characteristic frequency component monitored on the per-basis grounded ground wire, is the phase of the dancing characteristic frequency component monitored on the per-basis grounded ground wire, i ∈ [A, B, C], j ∈ [A, B, C], i ≠ j, k i ′ is the mapping coefficient from the dancing amplitude of the i-phase conductor to the amplitude of the characteristic frequency component of the sectional insulated ground wire when only the i-phase conductor is dancing, G is the phase of the dancing characteristic frequency component on the sectional insulated ground wire when only the i-phase conductor is dancing, k j ′ is the mapping coefficient from the dancing amplitude of the j-phase conductor to the amplitude of the characteristic frequency component of the sectional insulated ground wire when only the j-phase conductor is dancing, H is the phase of the dancing characteristic frequency component on the sectional insulated ground wire when only the j-phase conductor is dancing, f1 is the amplitude of the dancing characteristic frequency component monitored on the sectional insulated ground wire, is the phase of the dancing characteristic frequency component monitored on the sectional insulated ground wire.

[0157] In summary, a transmission line dancing conductor discrimination system based on ground wire electromagnetic signals proposed in this embodiment can accurately determine which conductors are dancing, making the dancing monitoring technology based on ground wire electromagnetic signals more refined.

[0158] Embodiment III

[0159] To implement the above embodiments, the present disclosure also provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the method described in Embodiment 1 is implemented.

[0160] Embodiment 4

[0161] To implement the above embodiments, the present disclosure also provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the method described in Embodiment 1 is implemented.

[0162] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0163] Any process or method description shown in the flowchart or described in other ways herein can be understood as representing a module, segment, or part of code including one or more executable instructions for implementing a customized logical function or process. The scope of the preferred embodiments of the present application includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in a reverse order according to the functions involved, rather than in the order shown or discussed. This should be understood by those skilled in the art of the embodiments of the present application.

[0164] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for identifying dancing conductors in power transmission lines based on ground wire electromagnetic signals, characterized in that: The method comprises: Obtain electromagnetic signals on two ground wires in a single-circuit transmission line; Performing spectrum analysis on the electromagnetic signal to determine the number of groups of dancing frequency components in the electromagnetic signal and the phase of each dancing frequency component in the group; The dancing conductor in the transmission line is judged according to the number of groups and the phase of each dancing frequency component, wherein if the number of groups of the dancing frequency component in the electromagnetic signal is 1 or 2, the dancing conductor in the transmission line is judged based on the phase of the frequency component, the phase of the dancing characteristic frequency of the preset A-phase conductor when dancing, the phase of the dancing characteristic frequency of the preset B-phase conductor when dancing, and the phase of the dancing characteristic frequency of the preset C-phase conductor when dancing; if the number of groups of the dancing frequency component in the electromagnetic signal is 3, the three-phase conductors A, B, and C in the transmission line are all dancing conductors; The electromagnetic signal includes: an induced current on the base-by-base ground wire and a voltage across the insulator of the segmented insulation ground wire.

2. The method according to claim 1, characterized in that The phase of the dancing characteristic frequency of the preset A-phase conductor when dancing is -31°; The phase of the dancing characteristic frequency of the preset B-phase conductor when dancing is 89°; The phase of the dancing characteristic frequency of the preset C-phase conductor when dancing is -151°.

3. The method according to claim 2, characterized in that If the number of groups of dancing frequency components in the electromagnetic signal is 1 or 2, judging the dancing conductor in the transmission line based on the phase of the frequency component, the phase of the dancing characteristic frequency when the A-phase conductor is dancing, the phase of the dancing characteristic frequency when the B-phase conductor is dancing, and the phase of the dancing characteristic frequency when the C-phase conductor is dancing, includes: When the number of groups of dancing frequency components in the electromagnetic signal is 1: If the phase of the dancing frequency component is the same as the phase of the dancing characteristic frequency of the preset A-phase conductor when it is dancing, or the phase of the dancing characteristic frequency of the preset B-phase conductor when it is dancing, or the phase of the dancing characteristic frequency of the preset C-phase conductor when it is dancing, then it is determined that the dancing conductor in the power transmission line is the conductor corresponding to the phase of the dancing frequency component as the dancing conductor, otherwise, the dancing conductor in the power transmission line is determined based on the first scheme; When the number of groups of dancing frequency components in the electromagnetic signal is 2: Respectively determine whether the phase of each of the dancing frequency components is the same as any phase of the preset dancing characteristic frequency of the A-phase conductor when dancing, the preset dancing characteristic frequency of the B-phase conductor when dancing, and the preset dancing characteristic frequency of the C-phase conductor when dancing; If the phases of the two groups of dancing frequency components are the same as the phases of the preset dancing characteristic frequency of the A-phase conductor when it is dancing and the phases of the preset dancing characteristic frequency of the B-phase conductor when it is dancing, it is determined that the dancing conductors in the power transmission line are the A-phase conductor and the B-phase conductor; If the phases of the two groups of dancing frequency components are the same as the phases of the preset dancing characteristic frequency of the A-phase conductor when it is dancing and the phases of the preset dancing characteristic frequency of the C-phase conductor when it is dancing, it is determined that the dancing conductors in the power transmission line are the A-phase conductor and the C-phase conductor; If the phases of the two groups of dancing frequency components are the same as the phases of the preset dancing characteristic frequency of the B-phase conductor when it is dancing and the phases of the preset dancing characteristic frequency of the C-phase conductor when it is dancing, it is determined that the dancing conductors in the power transmission line are the B-phase conductor and the C-phase conductor; Otherwise, it is determined that the three-phase conductors A, B, and C in the transmission line are all dancing conductors, and the dancing frequencies of two of the conductors are the same.

4. The method according to claim 3, characterized in that The first solution comprises: Step F1: For the mth time, assume that the i-phase conductor and the j-phase conductor in the transmission line are dancing conductors, and solve equation 1: Get the dancing amplitude Api of the i-phase conductor and the dancing amplitude Apj of the j-phase conductor; Step F2: Substitute the dancing amplitude of the i-phase conductor and the dancing amplitude of the j-phase conductor into equation 2: In the process, determine whether the equation of equation 2 is established. If it is established, go to step F3. Otherwise, set m=m+1 and return to step F1 until m+1 is greater than 3, and then go to step F4. Step F3: the i-phase conductor and the j-phase conductor in the power transmission line are dancing conductors, and the dancing frequencies of the i-phase conductor and the j-phase conductor are the same; Step F4: The three-phase conductors A, B, and C in the power transmission line are all dancing conductors, and the dancing frequencies of the three-phase conductors A, B, and C are the same; Among them, k i is the mapping coefficient of the i-th phase conductor galloping amplitude to the amplitude of the characteristic frequency component of the grounding line on a base-by-base basis when only the i-th phase conductor gallops, k j is the mapping coefficient of the dancing amplitude of the j-th phase conductor to the amplitude of the characteristic frequency component of the base-to-base grounding wire when only the j-th phase conductor is dancing, F is the preset phase of the dancing characteristic frequency component on the base-to-base grounding wire when only the j-th phase conductor is dancing, D is the preset phase of the dancing characteristic frequency component on the base-to-base grounding wire when only the i-th phase conductor is dancing, f0 is the amplitude of the dancing characteristic frequency component monitored on the base-to-base grounding wire, is the phase of the dancing characteristic frequency component monitored on the base-by-base ground line, i∈[A, B, C], j∈[A, B, C], i≠j, k′ i is the mapping coefficient of the i-th phase conductor galloping amplitude to the amplitude of the characteristic frequency component of the segmented insulated ground wire when only the i-th phase conductor gallops, G is the phase of the galloping characteristic frequency component on the segmented insulated ground wire when only the i-th phase conductor gallops, k′ j is the mapping coefficient of the j-th phase conductor galloping amplitude to the segmented insulated ground wire characteristic frequency component amplitude when only the j-th phase conductor gallops, H is the preset phase of the galloping characteristic frequency component on the segmented insulated ground wire when only the j-th phase conductor gallops, f1 is the amplitude of the galloping characteristic frequency component monitored on the segmented insulated ground wire, It is the phase of the dancing characteristic frequency component monitored on the segmented insulated ground wire.

5. A system for identifying dancing conductors in power transmission lines based on ground wire electromagnetic signals, characterized in that: The system comprises: An acquisition module is used to acquire electromagnetic signals on two ground wires in a single-circuit power transmission line; A determination module, configured to perform spectrum analysis on the electromagnetic signal to determine the number of groups of dancing frequency components in the electromagnetic signal and the phase of each dancing frequency component in the group; A judgment module, used for judging the dancing conductor in the transmission line according to the number of groups and the phase of each dancing frequency component, wherein the judgment module includes a first judgment unit, used for judging the dancing conductor in the transmission line based on the phase of the frequency component, the phase of the dancing characteristic frequency of the preset A-phase conductor when dancing, the phase of the dancing characteristic frequency of the preset B-phase conductor when dancing, and the phase of the dancing characteristic frequency of the preset C-phase conductor when dancing, if the number of groups of the dancing frequency component in the electromagnetic signal is 1 or 2; a second judgment unit, used for judging that the A, B, and C three-phase conductors in the transmission line are all dancing conductors if the number of groups of the dancing frequency component in the electromagnetic signal is 3; The electromagnetic signal includes: an induced current on the base-by-base ground wire and a voltage across the insulator of the segmented insulation ground wire.

6. The system according to claim 5, characterized in that The phase of the dancing characteristic frequency of the preset A-phase conductor when dancing is -31°; The phase of the dancing characteristic frequency of the preset B-phase conductor when dancing is 89°; The phase of the dancing characteristic frequency of the preset C-phase conductor when dancing is -151°.

7. The system according to claim 6, characterized in that The first determining unit is further configured to: When the number of groups of dancing frequency components in the electromagnetic signal is 1: If the phase of the dancing frequency component is the same as the phase of the dancing characteristic frequency of the preset A-phase conductor when it is dancing, or the phase of the dancing characteristic frequency of the preset B-phase conductor when it is dancing, or the phase of the dancing characteristic frequency of the preset C-phase conductor when it is dancing, then it is determined that the dancing conductor in the power transmission line is the conductor corresponding to the phase of the dancing frequency component as the dancing conductor, otherwise, the dancing conductor in the power transmission line is determined based on the first scheme; When the number of groups of dancing frequency components in the electromagnetic signal is 2: Respectively determine whether the phase of each of the dancing frequency components is the same as any phase of the preset dancing characteristic frequency of the A-phase conductor when dancing, the preset dancing characteristic frequency of the B-phase conductor when dancing, and the preset dancing characteristic frequency of the C-phase conductor when dancing; If the phases of the two groups of dancing frequency components are the same as the phases of the preset dancing characteristic frequency of the A-phase conductor when it is dancing and the phases of the preset dancing characteristic frequency of the B-phase conductor when it is dancing, it is determined that the dancing conductors in the power transmission line are the A-phase conductor and the B-phase conductor; If the phases of the two groups of dancing frequency components are the same as the phases of the preset dancing characteristic frequency of the A-phase conductor when it is dancing and the phases of the preset dancing characteristic frequency of the C-phase conductor when it is dancing, it is determined that the dancing conductors in the power transmission line are the A-phase conductor and the C-phase conductor; If the phases of the two groups of dancing frequency components are the same as the phases of the preset dancing characteristic frequency of the B-phase conductor when it is dancing and the phases of the preset dancing characteristic frequency of the C-phase conductor when it is dancing, it is determined that the dancing conductors in the power transmission line are the B-phase conductor and the C-phase conductor; Otherwise, it is determined that the three-phase conductors A, B, and C in the transmission line are all dancing conductors, and the dancing frequencies of two of the conductors are the same.

8. The system according to claim 7, characterized in that The first solution comprises: Step H1: For the mth time, assume that the i-phase conductor and the j-phase conductor in the transmission line are dancing conductors, and solve equation 1: Get the dancing amplitude Api of the i-phase conductor and the dancing amplitude Apj of the j-phase conductor; Step H2: Substitute the dancing amplitude of the i-phase conductor and the dancing amplitude of the j-phase conductor into equation 2: In the process, determine whether the equation of equation 2 is established. If it is established, proceed to step H3. Otherwise, set m=m+1 and return to step F1 until m+1 is greater than 3, and proceed to step H4. Step H3: the i-phase conductor and the j-phase conductor in the power transmission line are dancing conductors, and the dancing frequencies of the i-phase conductor and the j-phase conductor are the same; Step H4: The three-phase conductors A, B, and C in the power transmission line are all dancing conductors, and the dancing frequencies of the three-phase conductors A, B, and C are the same; Among them, k i is the mapping coefficient of the i-th phase conductor galloping amplitude to the amplitude of the characteristic frequency component of the grounding line on a base-by-base basis when only the i-th phase conductor gallops, k j is the mapping coefficient of the dancing amplitude of the j-th phase conductor to the amplitude of the characteristic frequency component of the base-to-base grounding wire when only the j-th phase conductor is dancing, F is the preset phase of the dancing characteristic frequency component on the base-to-base grounding wire when only the j-th phase conductor is dancing, D is the preset phase of the dancing characteristic frequency component on the base-to-base grounding wire when only the i-th phase conductor is dancing, f0 is the amplitude of the dancing characteristic frequency component monitored on the base-to-base grounding wire, is the phase of the dancing characteristic frequency component monitored on the base-by-base ground line, i∈[A, B, C], j∈[A, B, C], i≠j, k i ′ is the mapping coefficient of the i-th phase conductor galloping amplitude to the amplitude of the characteristic frequency component of the segmented insulated ground wire when only the i-th phase conductor gallops, G is the phase of the galloping characteristic frequency component on the segmented insulated ground wire when only the i-th phase conductor gallops, k j ′ is the mapping coefficient of the j-th phase conductor galloping amplitude to the segmented insulated ground wire characteristic frequency component amplitude when only the j-th phase conductor gallops, H is the preset phase of the galloping characteristic frequency component on the segmented insulated ground wire when only the j-th phase conductor gallops, f1 is the amplitude of the galloping characteristic frequency component monitored on the segmented insulated ground wire, It is the phase of the dancing characteristic frequency component monitored on the segmented insulated ground wire.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method according to any one of claims 1 to 4 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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