Method and device for calculating induced voltage of ground wire of extra-high voltage lead without power failure

Abstract

The invention relates to a method and a device for calculating the induced voltage of an uninterrupted ground wire of an extra-high voltage wire. The method for calculating the induced voltage of the uninterrupted ground wire of the extra-high voltage wire comprises the following steps: dividing the ground wire into a plurality of sub-wire segments with equal distances; building an equivalent circuit model of the sub-line segment, and obtaining an induced voltage generated by the wire on the sub-line segment, the impedance of the sub-line segment and the admittance of the sub-line segment; determining the output induced voltage of the sub-line segment according to the induced voltage generated by the wire on the sub-line segment, the impedance of the sub-line segment and the admittance of the sub-line segment; and taking the sum of the output induced voltages of the sub-line segments as the total induced voltage of the ground wire. Through the technical scheme of the invention, the difficulty of obtaining the induced voltage of the extra-high voltage ground wire is reduced, the calculation precision of the induced voltage of the extra-high voltage ground wire is improved, and the ice melting work of the extra-high voltage ground wire can be effectively guided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of conductors, and particularly to a calculation method and device for the induced voltage of a live working ground wire of an extra-high voltage conductor. Background Art

[0002] Extra-high voltage transmission lines are the key arteries for long-distance power transmission in China. For extra-high voltage conductors of transmission lines in China, insulation transformation is mostly adopted to facilitate energized ice melting in winter.

[0003] During the process of live ice melting, the induced overvoltage generated by the conductor on the ground wire may cause damage to the ice melting device. Therefore, it is necessary to analyze the induced voltage. The induced voltage can be obtained through measurement and simulation calculation. However, the extra-high voltage ground wire is located at a high altitude, and it is extremely difficult to measure the induced voltage. Moreover, there are large errors in the existing induced voltage simulation models. It is difficult to effectively obtain the amplitude and frequency spectrum characteristics of the induced voltage of the extra-high voltage AC ground wire, and it is impossible to guide the ice melting work of the extra-high voltage ground wire. Summary of the Invention

[0004] To solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a calculation method and device for the induced voltage of a live working ground wire of an extra-high voltage conductor, which reduces the difficulty of obtaining the induced voltage of the extra-high voltage ground wire, improves the calculation accuracy of the induced voltage of the extra-high voltage ground wire, and can effectively guide the ice melting work of the extra-high voltage ground wire.

[0005] In a first aspect, the present disclosure provides a calculation method for the induced voltage of a live working ground wire of an extra-high voltage conductor, including:

[0006] Dividing the ground wire into a plurality of sub-segments with equal distances;

[0007] Building an equivalent circuit model of the sub-segment, and obtaining the induced voltage generated by the conductor on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment;

[0008] Determining the output induced voltage of the sub-segment according to the induced voltage generated by the conductor on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment;

[0009] Taking the sum of the output induced voltages of each sub-segment as the total induced voltage of the ground wire.

[0010] Optionally, the conductor includes a first-phase conductor, a second-phase conductor, and a third-phase conductor;

[0011] The obtaining the induced voltage generated by the conductor on the sub-segment includes:

[0012] Obtain the first induced voltage generated by the first-phase conductor on the sub-segment, the second induced voltage generated by the second-phase conductor on the sub-segment, and the third induced voltage generated by the third-phase conductor on the sub-segment respectively;

[0013] Take the sum of the first induced voltage, the second induced voltage, and the third induced voltage as the induced voltage generated by the conductor on the sub-segment.

[0014] Optionally, the induced voltage generated by the conductor on the sub-segment satisfies the following formula:

[0015]

[0016] where, U A is the first induced voltage, U B is the second induced voltage, U C is the third induced voltage, M A is the mutual inductance component between the first-phase conductor and the ground wire, M B is the mutual inductance component between the second-phase conductor and the ground wire, M C is the mutual inductance component between the third-phase conductor and the ground wire, i A is the current flowing through the first-phase conductor, i B is the current on the second-phase conductor, i C is the current on the third-phase conductor.

[0017] Optionally, the obtaining of the impedance of the sub-segment includes:

[0018] Build an RL equivalent circuit model of resistance and inductance;

[0019] Obtain the inductance and resistance of the sub-segment at different frequencies;

[0020] According to the inductance and resistance of the sub-segment at different frequencies and the RL equivalent circuit model, obtain the impedance of the sub-segment.

[0021] Optionally, the impedance of the sub-segment satisfies the following formula:

[0022]

[0023] where, R1 is the resistance of the sub-segment at a frequency of 10 Hz, L1 is the inductance of the sub-segment at a frequency of 10 Hz, R2 is the resistance of the sub-segment at a frequency of 1 kHz, L2 is the inductance of the sub-segment at a frequency of 1 kHz, R3 is the resistance of the sub-segment at a frequency of 100 kHz, L3 is the inductance of the sub-segment at a frequency of 100 kHz, R4 is the resistance of the sub-segment at a frequency of 10 MHz, and L4 is the inductance of the sub-segment at a frequency of 10 MHz.

[0024] Optionally, obtaining the admittance of the sub-segment includes:

[0025] Construct a GC equivalent circuit model of capacitance and conductance;

[0026] Obtain the conductance and capacitance of the sub-segment at different frequencies;

[0027] According to the conductance and capacitance of the sub-segment at different frequencies and the GC equivalent circuit model, obtain the admittance of the sub-segment.

[0028] Optionally, the admittance of the sub-segment satisfies the following formula:

[0029]

[0030] where G1 is the conductance of the sub-segment at a frequency of 10 Hz, C1 is the capacitance of the sub-segment at a frequency of 10 Hz, G2 is the conductance of the sub-segment at a frequency of 1 kHz, C2 is the capacitance of the sub-segment at a frequency of 1 kHz, G3 is the conductance of the sub-segment at a frequency of 100 kHz, C3 is the capacitance of the sub-segment at a frequency of 100 kHz, G4 is the conductance of the sub-segment at a frequency of 10 MHz, and C4 is the capacitance of the sub-segment at a frequency of 10 MHz.

[0031] Optionally, taking the sum of the output induced voltages of each sub-segment as the total induced voltage of the ground wire includes:

[0032] Connect the sub-segments in series to obtain the equivalent circuit model of the ground wire;

[0033] Substitute the output induced voltages of each sub-segment into the equivalent circuit model of the ground wire to obtain the sum of the output induced voltages of each sub-segment.

[0034] In a second aspect, the present disclosure also provides a calculation device for the induced voltage of an ultra-high voltage conductor, including:

[0035] A sub-segment division module, configured to divide the ground wire into a plurality of sub-segments with equal distances;

[0036] An acquisition module, configured to construct an equivalent circuit model of the sub-segment, acquire the induced voltage generated by the conductor on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment;

[0037] An output induced voltage calculation module of the sub-segment, configured to determine the output induced voltage of the sub-segment according to the induced voltage generated by the conductor on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment;

[0038] The total induced voltage calculation module is configured to use the sum of the output induced voltages of each of the sub-segments as the total induced voltage of the ground wire.

[0039] In a third aspect, the present disclosure also provides a storage medium storing a program or instructions, and the program or instructions cause a computer to execute the steps of the method for calculating the induced voltage of the energized ground wire of the extra-high voltage transmission line as described in the first aspect.

[0040] The technical solutions provided by the embodiments of the present disclosure have the following advantages compared with the prior art:

[0041] The embodiments of the present disclosure provide a method, a device, and a storage medium for calculating the induced voltage of an energized ground wire of an extra-high voltage transmission line. The method for calculating the induced voltage of the energized ground wire of the extra-high voltage transmission line includes: dividing the ground wire into a plurality of sub-segments with equal distances; building an equivalent circuit model of the sub-segment to obtain the induced voltage generated by the conductor on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment; determining the output induced voltage of the sub-segment according to the induced voltage generated by the conductor on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment; and using the sum of the output induced voltages of each of the sub-segments as the total induced voltage of the ground wire. Thereby, the difficulty of obtaining the induced voltage of the extra-high voltage ground wire is reduced, the calculation accuracy of the induced voltage of the extra-high voltage ground wire is improved, and the de-icing work of the extra-high voltage ground wire can be effectively guided. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0043] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0044] Figure 1 It is a schematic flowchart of a method for calculating the induced voltage of an energized ground wire of an extra-high voltage transmission line provided by an embodiment of the present disclosure;

[0045] Figure 2 It is a schematic diagram of an equivalent circuit model of a sub-segment provided by an embodiment of the present disclosure;

[0046] Figure 3 It is a schematic diagram of an RL equivalent circuit model provided by an embodiment of the present disclosure;

[0047] Figure 4 It is a schematic diagram of a GC equivalent circuit model provided by an embodiment of the present disclosure;

[0048] Figure 5 Structural schematic diagram of a calculation device for induced voltage of a live working ground wire of an UHV conductor

[0049] Figure 6 Structural schematic diagram of a processing device provided by an embodiment of the present disclosure Specific embodiments

[0050] In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other

[0051] In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments

[0052] In the related art, during the live de-icing process, the induced overvoltage generated by the conductor on the ground wire may cause damage to the de-icing device. Therefore, it is necessary to analyze the induced voltage. The induced voltage can be obtained through measurement and simulation calculation. However, the UHV ground wire is located at a high altitude, and it is extremely difficult to measure the induced voltage. Moreover, there are large errors in the existing induced voltage simulation models. It is difficult to effectively obtain the amplitude and frequency spectrum characteristics of the induced voltage of the UHV AC ground wire, and it is impossible to guide the de-icing work of the UHV ground wire

[0053] To solve the above problems, an embodiment of the present disclosure provides a calculation method for the induced voltage of a live working ground wire of an UHV conductor Figure 1 Flow schematic diagram of a calculation method for the induced voltage of a live working ground wire of an UHV conductor provided by an embodiment of the present disclosure. The calculation method for the induced voltage of a live working ground wire of an UHV conductor can be applied to an application scenario where the induced voltage of an UHV conductor needs to be calculated. This method can be executed by the calculation device for the induced voltage of an UHV conductor provided by an embodiment of the present disclosure, and the calculation device for the induced voltage of an UHV conductor can be implemented in software and / or hardware. As Figure 1 shown, the calculation method for the induced voltage of a live working ground wire of an UHV conductor includes

[0054] S101. Divide the ground wire into multiple sub-segments with equal distances

[0055] Exemplarily, the ground wire can be divided into multiple sub-segments with equal distances. Since the length of the ground wire is generally 5 - 10 kilometers, in order to improve the calculation accuracy of the induced voltage, the length of each sub-segment is set within 1 meter to avoid the problem of reduced calculation accuracy caused by too long length of the divided sub-segments

[0056] S102. Build an equivalent circuit model of the sub-segment, and obtain the induced voltage generated by the wire on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment.

[0057] Figure 2 As shown in the schematic diagram of an equivalent circuit model of a sub-segment provided by an embodiment of the present disclosure, optionally, as Figure 2 shown, the wire includes a first-phase wire A, a second-phase wire B, and a third-phase wire C; obtaining the induced voltage generated by the wire on the sub-segment includes: respectively obtaining a first induced voltage U A generated by the first-phase wire A on the sub-segment, a second induced voltage U B generated by the second-phase wire B on the sub-segment, and a third induced voltage U C generated by the third-phase wire C on the sub-segment; and taking the sum of the first induced voltage U A , the second induced voltage U B , and the third induced voltage U C as the induced voltage generated by the wire on the sub-segment.

[0058] Specifically, as Figure 2 shown, the wire is, for example, a three-phase wire, including a first-phase wire A, a second-phase wire B, and a third-phase wire C. The first-phase wire A, the second-phase wire B, and the third-phase wire C all generate induced voltages with respect to the ground wire. Therefore, respectively obtain a first induced voltage U A generated by the first-phase wire A on the sub-segment, a second induced voltage U B generated by the second-phase wire B on the sub-segment, and a third induced voltage U C generated by the third-phase wire C on the sub-segment, and take the sum of the first induced voltage U A , the second induced voltage U B , and the third induced voltage U C as the induced voltage generated by the wire on the sub-segment.

[0059] Optionally, the induced voltage generated by the wire on the sub-segment satisfies the following formula:

[0060]

[0061] where U A is the first induced voltage, U B is the second induced voltage, U C is the third induced voltage, M A is the mutual inductance component between the first-phase wire A and the ground wire, M B is the mutual inductance component between the second-phase wire B and the ground wire, M C is the mutual inductance component between the third-phase wire C and the ground wire, i A is the current flowing through the first-phase wire A, iB is the current on the second-phase conductor B, i C is the current on the third-phase conductor C. Among them, U A , U B , U C , i A , i B and i C均 are the calculation input quantities.

[0062] Specifically, the mutual inductance component M A between the first-phase conductor A and the ground wire can be extracted by finite element software. Exemplarily, a current I A is applied to the first-phase conductor A, and the magnetic flux ФA on the ground wire is extracted. Then the mutual inductance component M A = ФA / I A ; a current I B is applied to the second-phase conductor B, and the magnetic flux ФB on the ground wire is extracted. Then the mutual inductance component M B = ФB / I B ; a current I C is applied to the third-phase conductor C, and the magnetic flux ФC on the ground wire is extracted. Then the mutual inductance component M C = ФC / I C .

[0063] Optionally, obtaining the impedance of the sub-segment includes: building an RL equivalent circuit model of resistance and inductance; obtaining the inductance and resistance of the sub-segment at different frequencies; and obtaining the impedance of the sub-segment according to the inductance and resistance of the sub-segment at different frequencies and the RL equivalent circuit model.

[0064] Figure 3 is a schematic diagram of an RL equivalent circuit model provided by an embodiment of the present disclosure. As Figure 3 shown, considering that the induced voltage on the ground wire includes both DC voltage and 50Hz power frequency voltage, and at the same time there are also induced voltage components caused by switching and lightning overvoltages, that is, the finally output induced voltage on the ground wire is related to the voltage source inside the ground wire, that is, the induced voltage of the conductor to the ground wire, and is also related to the impedance of the ground wire itself. Therefore, the stray resistance and inductance parameters on the ground wire are equivalent by an RL equivalent circuit model, and the impedance of the sub-segment is obtained according to the inductance and resistance of the sub-segment at different frequencies and the RL equivalent circuit model.

[0065] Figure 2 shows that the RL equivalent circuit model is connected in series between the ground wire and the conductor. Figure 3 exemplarily shows a four-layer stepped RL (resistance-inductance) equivalent circuit model in Figure 3As shown, the RL equivalent circuit model includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first inductor L1, a second inductor L2, a third inductor L3, and a fourth inductor L4. The first resistor R1 and the first inductor L1 are connected in series, the second resistor R2 and the second inductor L2 are connected in series, the third resistor R3 and the third inductor L3 are connected in series, and the fourth resistor R4 and the fourth inductor L4 are connected in series. Since the ground wire has a skin effect, that is, the current tends to flow towards the edge at high frequencies, and the impedance is smaller under the action of high frequencies closer to the edge, the stepped RL equivalent circuit model can better simulate the skin effect of the ground wire at high frequencies.

[0066] Optionally, the impedance of the sub-segment satisfies the following formula:

[0067]

[0068] Wherein, R1 is the resistance of the sub-segment at a frequency of 10 Hz, L1 is the inductance of the sub-segment at a frequency of 10 Hz, R2 is the resistance of the sub-segment at a frequency of 1 kHz, L2 is the inductance of the sub-segment at a frequency of 1 kHz, R3 is the resistance of the sub-segment at a frequency of 100 kHz, L3 is the inductance of the sub-segment at a frequency of 100 kHz, R4 is the resistance of the sub-segment at a frequency of 10 MHz, and L4 is the inductance of the sub-segment at a frequency of 10 MHz.

[0069] It can be understood that Figure 2 the impedances in the first-phase wire A, the second-phase wire B, and the third-phase wire C in

[0070] can also be calculated according to the above embodiments, which will not be elaborated here.

[0071] Figure 4 is a schematic diagram of a GC equivalent circuit model provided by an embodiment of the present disclosure. As Figure 4 shown, the induced voltage finally output by the ground wire is related to the voltage source inside the ground wire, that is, the induced voltage of the wire to the ground wire, and is also related to the admittance generated by the mutual capacitance effect between the wire and the ground wire. The stray parameters of capacitance and conductance on the ground wire are equivalent using the GC equivalent circuit model. According to the conductance and capacitance of the sub-segment at different frequencies and the GC equivalent circuit model, the admittance of the sub-segment is obtained.

[0072] Figure 2 shows that the GC equivalent circuit model is connected in parallel between the ground wire and the wire. Figure 4An exemplary four-layer stepped GC (conductance-capacitance) equivalent circuit model is shown. The stray conductance and capacitance parameter indicators on the sub-segments are calculated using the GC equivalent circuit model. Each layer of the four-layer stepped GC equivalent circuit model consists of a capacitor and a conductance in parallel, as Figure 4 shown. The GC equivalent circuit model includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first conductance G1, a second conductance G2, a third conductance G3, and a fourth conductance G4. The first capacitor C1 and the first conductance G1 are in parallel, the second capacitor C2 and the second conductance G2 are in parallel, the third capacitor C3 and the third conductance G3 are in parallel, and the fourth capacitor C4 and the fourth conductance G4 are in parallel. Using the stepped GC equivalent circuit model can also better simulate the skin effect of the ground wire at high frequencies.

[0073] Optionally, the admittance of the sub-segment satisfies the following formula:

[0074]

[0075] where G1 is the conductance of the sub-segment at a frequency of 10 Hz, C1 is the capacitance of the sub-segment at a frequency of 10 Hz, G2 is the conductance of the sub-segment at a frequency of 1 kHz, C2 is the capacitance of the sub-segment at a frequency of 1 kHz, G3 is the conductance of the sub-segment at a frequency of 100 kHz, C3 is the capacitance of the sub-segment at a frequency of 100 kHz, G4 is the conductance of the sub-segment at a frequency of 10 MHz, and C4 is the capacitance of the sub-segment at a frequency of 10 MHz.

[0076] Exemplarily, the admittance generated by the mutual capacitance effect between the first-phase conductor A and the ground wire, the admittance generated by the mutual capacitance effect between the second-phase conductor B and the ground wire, and the admittance generated by the mutual capacitance effect between the third-phase conductor C and the ground wire can all be calculated according to the above formula, and will not be elaborated here one by one.

[0077] S103. Determine the output induced voltage of the sub-segment according to the induced voltage generated by the wire on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment.

[0078] Exemplarily, when the voltage of the capacitor in the GC equivalent circuit model is greater than the ground wire voltage, the capacitor conductance will increase the induced voltage of the ground wire, and the output induced voltage of the sub-segment is the induced voltage generated by the wire on the sub-segment minus the induced voltage drop of the impedance plus the induced voltage drop of the admittance. When the voltage of the capacitor in the GC equivalent circuit model is less than the ground wire voltage, the capacitor conductance will reduce the induced voltage of the ground wire, and the output induced voltage of the sub-segment is the induced voltage generated by the wire on the sub-segment minus the induced voltage drop of the impedance minus the induced voltage drop of the admittance.

[0079] Exemplarily, the voltage division of impedance can be determined according to the current flowing through the ground wire and the impedance, and the voltage division of admittance can be determined according to the current flowing through the ground wire and the admittance, which are well-known to those skilled in the art and will not be elaborated here.

[0080] S104. Use the sum of the output induced voltages of each sub-segment as the total induced voltage of the ground wire.

[0081] Optionally, using the sum of the output induced voltages of each sub-segment as the total induced voltage of the ground wire includes: obtaining an equivalent circuit model of the ground wire by connecting the sub-segments in series; substituting the output induced voltages of each sub-segment into the equivalent circuit model of the ground wire to obtain the sum of the output induced voltages of each sub-segment.

[0082] Specifically, connect all the sub-segments in series to form a ring structure with head-to-tail connection as the equivalent circuit model of the ground wire, substitute the output induced voltages of each sub-segment and the equivalent circuit model of the ground wire into the simulation software, and calculate the sum of the output induced voltages of each sub-segment to obtain the total induced voltage of the ground wire.

[0083] The method for calculating the induced voltage of the live working ground wire of the UHV conductor provided by the embodiments of the present disclosure includes: dividing the ground wire into multiple sub-segments with equal distances; building an equivalent circuit model of the sub-segment to obtain the induced voltage generated by the conductor on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment; determining the output induced voltage of the sub-segment according to the induced voltage generated by the conductor on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment; using the sum of the output induced voltages of each sub-segment as the total induced voltage of the ground wire. Thereby, the difficulty of obtaining the induced voltage of the UHV ground wire is reduced, the calculation accuracy of the induced voltage of the UHV ground wire is improved, and the de-icing work of the UHV ground wire can be effectively guided.

[0084] The embodiments of the present disclosure also provide a calculation device for the induced voltage of the live working ground wire of the UHV conductor. Figure 5 As shown in the structural schematic diagram of a calculation device for the induced voltage of a UHV conductor provided by the embodiments of the present disclosure, Figure 5 the calculation device for the induced voltage of the UHV conductor includes: a sub-segment division module 501, an acquisition module 502, an output induced voltage calculation module 503 of the sub-segment, and a total induced voltage acquisition module 504.

[0085] Among them, the sub-segment division module 501 is configured to divide the ground wire into multiple sub-segments with equal distances; the acquisition module 502 is configured to build an equivalent circuit model of the sub-segment, and acquire the induced voltage generated by the wire on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment; the output induced voltage calculation module 503 of the sub-segment is configured to determine the output induced voltage of the sub-segment according to the induced voltage generated by the wire on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment; the total induced voltage calculation module 504 is configured to use the sum of the output induced voltages of each sub-segment as the total induced voltage of the ground wire.

[0086] The device provided in the above embodiments of the present disclosure and the method provided in the embodiments of the present disclosure are based on the same inventive concept and have the same beneficial effects, which will not be elaborated here.

[0087] The embodiments of the present disclosure also provide a processing device. Figure 6 It is a schematic structural diagram of a processing device provided in the embodiments of the present disclosure. As Figure 6 shown, the processing device includes a processor and a memory. The processor executes the steps of the method for calculating the induced voltage of the ground wire of the UHV wire without power interruption as described in the above embodiments by calling the programs or instructions stored in the memory, and thus has the beneficial effects described in the above embodiments, which will not be elaborated here.

[0088] As Figure 6 shown, it can be set that the processing device includes at least one processor 601, at least one memory 602, and at least one communication interface 603. Each component in the processing device is coupled together through a bus system 604. The communication interface 603 is used for information transmission with external devices. It can be understood that the bus system 604 is used to realize the connection and communication between these components. The bus system 604 includes not only a data bus, but also a power bus, a control bus, and a status signal bus. However, for the sake of clear illustration, in Figure 6 all kinds of buses are labeled as the bus system 604.

[0089] It can be understood that the memory 602 in this embodiment can be a volatile memory or a non-volatile memory, or can include both a volatile memory and a non-volatile memory. In some embodiments, the memory 602 stores the following elements: executable units or data structures, or subsets thereof, or extended sets thereof, an operating system, and applications. In the embodiments of the present disclosure, the processor 601 executes the steps of the embodiments of the method for calculating the induced voltage of the ground wire of the UHV wire without power interruption provided in the embodiments of the present disclosure by calling the programs or instructions stored in the memory 602.

[0090] The method for calculating the induced voltage of the live working ground wire of the UHV conductor provided by the embodiments of the present disclosure can be applied to or implemented by the processor 601. The processor 601 can be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the above method can be completed by the integrated logic circuit of the hardware in the processor 601 or the instructions in the form of software. The above-mentioned processor 601 can be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0091] The steps of the method for calculating the induced voltage of the live working ground wire of the UHV conductor provided by the embodiments of the present disclosure can be directly embodied as being executed and completed by the hardware decoding processor, or executed and completed by the combination of the hardware and software units in the decoding processor. The software unit can be located in mature storage media in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers, etc. This storage medium is located in the memory 602, and the processor 601 reads the information in the memory 602 and combines its hardware to complete the steps of the method.

[0092] The processing device may further include one or more physical components to execute the instructions generated when the processor 601 executes the method for calculating the induced voltage of the live working ground wire of the UHV conductor provided by the embodiments of the present application. Different physical components can be arranged inside or outside the processing device, such as a cloud server, etc. Each physical component cooperates with the processor 601 and the memory 602 to realize the functions of the processing device in this embodiment.

[0093] The embodiments of the present disclosure also provide a computer-readable storage medium, which stores programs or instructions, and the programs or instructions cause the computer to execute the steps of any one of the methods provided in the above embodiments.

[0094] In some embodiments, when the computer-executable instructions are executed by a computer processor, they can also be used to execute the technical solutions of any one of the above methods provided by the embodiments of the present disclosure, and achieve the corresponding beneficial effects.

[0095] Through the above description of the embodiments, those skilled in the art can clearly understand that the present disclosure can be implemented by means of software and necessary general-purpose hardware. Of course, it can also be implemented by hardware, but in many cases, the former is a better implementation. Based on this understanding, the technical solution of the present disclosure, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk, or optical disc of a computer, etc., including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various embodiments of the present disclosure.

[0096] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the element.

[0097] The above are only specific embodiments of the present disclosure to enable those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for calculating the induced voltage of a ground line of an ultra-high voltage conductor without power outage, characterized in that: include: Divide the ground line into multiple sub-line segments with equal distances; Building an equivalent circuit model of the sub-segment, obtaining the induced voltage generated by the wire on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment; Determine the output induced voltage of the sub-segment according to the induced voltage generated by the wire on the sub-segment, the impedance of the sub-segment and the admittance of the sub-segment; The sum of the output induced voltages of the sub-segments is taken as the total induced voltage of the ground line.

2. The method for calculating the induced voltage of the ground line of the UHV conductor without power outage according to claim 1 is characterized in that: The conductors include a first phase conductor, a second phase conductor and a third phase conductor; The step of obtaining the induced voltage generated by the conductor on the sub-segment comprises: Respectively acquiring a first induced voltage generated by the first phase conductor on the sub-segment, a second induced voltage generated by the second phase conductor on the sub-segment, and a third induced voltage generated by the third phase conductor on the sub-segment; The sum of the first induced voltage, the second induced voltage and the third induced voltage is taken as the induced voltage generated by the conductive wire on the sub-segment.

3. The method for calculating the induced voltage of the uninterrupted ground line of the UHV conductor according to claim 2, characterized in that: The induced voltage generated by the conductor on the sub-segment satisfies the following formula: Among them, U A is the first induced voltage, U B is the second induced voltage, U C is the third induced voltage, M A is the mutual inductance component between the first phase conductor and the ground wire, M B is the mutual inductance component between the second phase conductor and the ground wire, M C is the mutual inductance component between the third phase conductor and the ground wire, i A is the current flowing through the first phase conductor, i B is the current in the second phase conductor, i C is the current in the third phase conductor.

4. The method for calculating the induced voltage of the ground line of the UHV conductor without power outage according to claim 1, characterized in that: The obtaining the impedance of the sub-line segment comprises: Build the RL equivalent circuit model of resistance and inductance; Obtaining the inductance and resistance of the sub-line segment at different frequencies; The impedance of the sub-segment is obtained according to the inductance and resistance of the sub-segment at different frequencies and the RL equivalent circuit model.

5. The method for calculating the induced voltage of the ground line of the UHV conductor according to claim 4, characterized in that: The impedance of the sub-line segment satisfies the following formula: Among them, R1 is the resistance of the sub-segment at a frequency of 10 Hz, L1 is the inductance of the sub-segment at a frequency of 10 Hz, R2 is the resistance of the sub-segment at a frequency of 1 kHz, L2 is the inductance of the sub-segment at a frequency of 1 kHz, R3 is the resistance of the sub-segment at a frequency of 100 kHz, L3 is the inductance of the sub-segment at a frequency of 100 kHz, R4 is the resistance of the sub-segment at a frequency of 10 MHz, and L4 is the inductance of the sub-segment at a frequency of 10 MHz.

6. The method for calculating the induced voltage of the ground line of the UHV conductor according to claim 1, characterized in that: The obtaining the admittance of the sub-line segment comprises: Build a GC equivalent circuit model of capacitance and conductance; Obtaining the conductance and capacitance of the sub-segment at different frequencies; The admittance of the sub-segment is obtained according to the conductance and capacitance of the sub-segment at different frequencies and the GC equivalent circuit model.

7. The method for calculating the induced voltage of the ground line of the UHV conductor according to claim 6, characterized in that: The admittance of the sub-line segment satisfies the following formula: Among them, G1 is the conductance of the sub-segment at a frequency of 10 Hz, C1 is the capacitance of the sub-segment at a frequency of 10 Hz, G2 is the conductance of the sub-segment at a frequency of 1 kHz, C2 is the capacitance of the sub-segment at a frequency of 1 kHz, G3 is the conductance of the sub-segment at a frequency of 100 kHz, C3 is the capacitance of the sub-segment at a frequency of 100 kHz, G4 is the conductance of the sub-segment at a frequency of 10 MHz, and C4 is the capacitance of the sub-segment at a frequency of 10 MHz.

8. The method for calculating the induced voltage of the ground line of the UHV conductor without power outage according to claim 1, characterized in that: The sum of the output induced voltages of the sub-segments is used as the total induced voltage of the ground line, including: Connecting the sub-line segments in series to obtain an equivalent circuit model of the ground line; The output induced voltages of the sub-segments are substituted into the equivalent circuit model of the ground line to obtain the sum of the output induced voltages of the sub-segments.

9. A device for calculating the induced voltage of a ground line of an ultra-high voltage conductor without power outage, characterized in that: include: A sub-line segment division module is used to divide the ground line into a plurality of sub-line segments with equal distances; An acquisition module is used to build an equivalent circuit model of the sub-segment, and acquire the induced voltage generated by the wire on the sub-segment, the impedance of the sub-segment, and the admittance of the sub-segment; The output induced voltage calculation module of the sub-line segment is used to determine the output induced voltage of the sub-line segment according to the induced voltage generated by the wire on the sub-line segment, the impedance of the sub-line segment and the admittance of the sub-line segment; The total induced voltage calculation module is used to take the sum of the output induced voltages of each of the sub-segments as the total induced voltage of the ground line.

10. A storage medium, characterized in that: The storage medium stores a program or an instruction, and the program or the instruction enables a computer to execute the steps of the method for calculating the induced voltage of the ground wire of an ultra-high voltage conductor without power outage as described in any one of claims 1 to 8.

Images