Method and system for calculating induced voltage of low voltage line in the same corridor as ultra-high voltage line

Abstract

The present invention discloses a method and system for calculating the induced voltage of a low-voltage line in the same corridor as an ultra-high voltage line, including: obtaining the operating voltage and current data of the ultra-high voltage overhead line and the low-voltage line in the same corridor, the mutual capacitance and mutual inductance data per unit length between the three phases of the ultra-high voltage overhead line and the three phases of the low-voltage line in the same corridor, and the self-capacitance and self-inductance data of the three phases of the low-voltage line in the same corridor; respectively calculating the induced voltage, induced current, electrostatic induced voltage and current, and electromagnetic induced voltage and current data of the low-voltage line in the same corridor; if any of the above data exceeds the corresponding threshold requirements, the ultra-high voltage overhead line is redesigned until the above data all meet the corresponding threshold requirements. The present invention does not need to build a simulation model, nor does it need to simulate and compare all operating and shutdown conditions of all loops. The calculation process of line parameters is simple, with low workload and high efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of UHV overhead line design, and in particular to a method and system for calculating the induced voltage of a low-voltage line in the same corridor as an UHV line. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Traditional power transmission technology is restricted by factors such as large transmission loss, small transmission capacity, short transmission distance, and poor stability, and it is difficult to meet the needs of social development. UHV power transmission technology has many advantages in power transmission and supply, and has great development prospects.

[0004] At present, in the design process of UHV overhead lines, due to the lack of relevant standards, when there are low-voltage lines in the same corridor as the UHV lines, it is necessary to specifically calculate the induced voltage of the low-voltage lines to ensure that the impact on the low-voltage lines is within an allowable range, or to adjust the design ideas to reduce the impact on the low-voltage lines.

[0005] Domestic research on the induced voltage and induced current of overhead transmission lines mainly uses the ATP-EMTP simulation program to establish simulation models and perform calculations. Since the establishment of the ATP-EMTP model requires the setting of parameters such as the tower structure, line conductor model, line transposition, and line high-voltage reactor configuration of the line, a reasonable simulation model can be built. When some parameters are changed, the model needs to be modified again, which is time-consuming and labor-intensive, and it also takes a certain amount of time and energy to master the software. For UHV transmission networks with multiple circuits on the same tower, and when there are low-voltage overhead lines in the UHV line corridor, the entire calculation process needs to simulate and compare all operating and shutdown conditions of all circuits, and finally obtain the most serious control conditions and corresponding induced voltage and current values. If the manual adjustment of the shutdown lines is used for calculation one by one, the manual workload is extremely large and prone to errors; if these software are secondary developed to realize automatic cycle shutdown condition calculation, it involves calling or modifying their source code, and the operation difficulty is also quite large. Summary of the invention

[0006] In order to solve the above problems, the present invention proposes a method and system for calculating the induced voltage of a low-voltage line in the same corridor as an ultra-high voltage line. There is no need to build a simulation model, nor is there any need to simulate and compare all operating and shutdown conditions of all circuits. The calculation process of line parameters is simple, the workload is low and the efficiency is high.

[0007] In some embodiments, the following technical solutions are adopted:

[0008] The calculation method of induced voltage of low voltage lines in the same corridor as UHV lines includes:

[0009] Obtain the operating voltage and current data of the UHV overhead line and the low-voltage line in the same corridor, the mutual capacitance and mutual inductance data per unit length between the three phases ABC of the UHV overhead line and the phases a, b and c of the low-voltage line in the same corridor, and the self-capacitance and self-inductance data of the phases a, b and c of the low-voltage line in the same corridor;

[0010] Based on the data, respectively calculate the induced voltage, induced current, electrostatic induced voltage and current, and electromagnetic induced voltage and current data of the low-voltage line in the same corridor;

[0011] If any of the above data exceeds the corresponding threshold requirements, the UHV overhead line will be redesigned until the above data all meet the corresponding threshold requirements.

[0012] As a further solution, the calculation of the induced voltage and induced current of the low-voltage line in the same corridor is specifically as follows:

[0013]

[0014]

[0015]

[0016] Among them, l is the length of the low-voltage line in the same corridor, γ is the propagation constant of the line, α is the phase constant of the line, and Z C is the wave impedance of the low voltage line; is the low line voltage, is the low voltage line voltage sensing voltage, is the low voltage line current, is the low voltage line induced current, UHV line A phase voltage, The phase A current of the UHV line is the self-inductance of the low-voltage line in the same corridor; M Aa 、M Ba 、M Ca They are the mutual inductance per unit length between the three phases A, B, and C of the UHV line and phase a of the low voltage line in the same corridor.

[0017] As a further solution, the electrostatic induced voltage of the low-voltage line in the same corridor is calculated as follows:

[0018]

[0019]

[0020]

[0021] Among them, C Aa , CBa , C Ca are the mutual capacitance per unit length between the three phases A, B, and C of the UHV overhead line and the phase a of the low voltage line in the same corridor; C Ab , C Bb , C Cb are the mutual capacitance per unit length between the three phases A, B, and C of the UHV overhead line and the phase b of the low voltage line in the same corridor; C Ac , C Bc , C Cc are the mutual capacitance per unit length between the three phases A, B, and C of the UHV overhead line and the phase C of the low voltage line in the same corridor; U A , U B , U C are the A-phase, B-phase and C-phase voltages of the UHV overhead line respectively; U 1 , U 2 , U 3 are the electrostatic induction voltages of phases a, b, and c of the low-voltage lines in the same corridor respectively; C 0 It is the capacitance of the low-voltage line a-phase conductor to the ground in parallel with the capacitance of the low-voltage line a-phase conductor to the ground through the b-phase conductor, the c-phase conductor and the lightning conductor; C 1 C is the capacitance of the b-phase conductor of the low-voltage line to the ground and the capacitance of the b-phase conductor of the low-voltage line to the ground through the a-phase conductor, the c-phase conductor and the lightning conductor in parallel; 2 It is the parallel connection of the capacitance to ground of the c-phase conductor of the low-voltage line and the capacitance to ground of the c-phase conductor of the low-voltage line through the b-phase conductor, the a-phase conductor and the lightning arrester.

[0022] As a further solution, the electromagnetic induction current of the low-voltage line in the same corridor is calculated as follows:

[0023]

[0024]

[0025]

[0026] Among them, I′ 1 , I′ 2 , I′ 3 are the electromagnetic induction currents of phases a, b, and c of the low-voltage lines in the same corridor respectively; M Aa 、M Ba 、M Ca are the mutual inductance per unit length between the three phases ABC of the UHV overhead line and the phase a of the low voltage line in the same corridor; M ab 、M Bb 、M Cb are the mutual inductance per unit length between the three phases A, B and C of the UHV overhead line and the phase b of the low voltage line in the same corridor; M Ac、M Bc 、M Cc are the mutual inductance per unit length between the three phases A, B and C of the UHV overhead line and the phase C of the low voltage line in the same corridor; I A ,I B ,I C They are the A-phase, B-phase and C-phase currents of the UHV overhead line respectively; L1, L2 and L3 are the self-inductances of phases a, b and c of the low-voltage line in the same corridor respectively.

[0027] As a further solution, the electrostatic induced current of the low-voltage line in the same corridor is calculated as follows:

[0028] I 1 =jωl(C Aa U A +C Ba U B +C Ca U C )

[0029] I 2 =jωl(C Ab U A +C Bb U B +C Cb U C )

[0030] I 3 =jωl(C Ac U A +C Bc U B +C Cc U C )

[0031] Among them, I 1 ,I 2 ,I 3 They are the electrostatic induced currents of phases a, b, and c of the low-voltage lines in the same corridor respectively.

[0032] As a further solution, the electromagnetic induction voltage of the low-voltage line in the same corridor is calculated as follows:

[0033] U′ 1 =jωl(M Aa I A +M Ba I B +M Ca I C )

[0034] U′ 2 =jωl(M Ab I A +M Bb I B+M Cb I C )

[0035] U′ 3 =jωl(M AC I A +M Bc I B +M Cc I C )

[0036] Among them, U′ 1 , U′ 2 , U′ 3 They are the electromagnetic induced voltages of phases a, b, and c of the low-voltage lines in the same corridor respectively.

[0037] As a further solution, if any of the above data exceeds the corresponding threshold requirements, the UHV overhead line is redesigned, including:

[0038] Increase the absolute distance between UHV lines and low voltage lines;

[0039] Alternatively, reduce the effective length of UHV lines and low-voltage lines in parallel;

[0040] Alternatively, increase the phase-to-phase distance of UHV lines;

[0041] Alternatively, change the pole tower form of the UHV line, change the line layout or line phase sequence.

[0042] In other embodiments, the following technical solutions are adopted:

[0043] A system for calculating induced voltage of a low voltage line in the same corridor as an ultra-high voltage line, comprising:

[0044] A data acquisition module is used to acquire the operating voltage and current data of the UHV overhead line and the low-voltage line in the same corridor, the mutual capacitance and mutual inductance data per unit length between the three phases ABC of the UHV overhead line and the phases a, b and c of the low-voltage line in the same corridor, and the self-capacitance and self-inductance data of the phases a, b and c of the low-voltage line in the same corridor;

[0045] A data calculation module, used to calculate the induced voltage, induced current, electrostatic induced voltage and current, and electromagnetic induced voltage and current data of the low-voltage line in the same corridor based on the data;

[0046] The threshold judgment module is used to redesign the UHV overhead line if any of the above data exceeds the corresponding threshold requirement until the above data all meet the corresponding threshold requirement.

[0047] In other embodiments, the following technical solutions are adopted:

[0048] A terminal device includes a processor and a memory, wherein the processor is used to implement various instructions; the memory is used to store multiple instructions, wherein the instructions are suitable for being loaded by the processor and executing the above-mentioned method for calculating the induced voltage of a low-voltage line in the same corridor as an ultra-high voltage line.

[0049] In other embodiments, the following technical solutions are adopted:

[0050] A computer-readable storage medium stores a plurality of instructions, wherein the instructions are suitable for being loaded by a processor of a terminal device and executing the above-mentioned method for calculating the induced voltage of a low-voltage line in the same corridor as an ultra-high voltage line.

[0051] Compared with the prior art, the present invention has the following beneficial effects:

[0052] (1) The present invention does not need to build a simulation model, nor does it need to simulate and compare all operating and shutdown conditions of all circuits. The calculation process of line parameters is simple, with low workload and high efficiency. At the same time, it is not restricted by parameter modification.

[0053] Other features and advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 Schematic diagram of a calculation model for induced voltage and current between transmission lines in an embodiment of the present invention. DETAILED DESCRIPTION

[0055] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0057] Embodiment 1

[0058] In one or more embodiments, a method for calculating the induced voltage of a low voltage line in the same corridor as an ultra-high voltage line is disclosed, which specifically includes the following process:

[0059] (1) Obtain the operating voltage and current data of the UHV overhead line and the low-voltage line in the same corridor, the mutual capacitance and mutual inductance data per unit length between the three phases ABC of the UHV overhead line and the phases a, b, and c of the low-voltage line in the same corridor, and the self-capacitance and self-inductance data of the phases a, b, and c of the low-voltage line in the same corridor;

[0060] In this embodiment, it is assumed that the 1000kV UHV overhead line and the low-voltage line in the same corridor are fully coupled, both lines are single-circuit lines, and there is no influence of high-voltage reactors on the low-voltage line in the same corridor.

[0061] Since there is line capacitance and line inductance between two different transmission lines, and each transmission line itself has ground capacitance and ground inductance. Therefore, this embodiment obtains the operating voltage and current data of the UHV overhead line: U A , U B , U C ,I A ,I B ,I C , and the operating voltage and current data of the low-voltage lines in the same corridor: U a , U b , U c ,I a ,I b ,I c The mutual capacitance and mutual inductance per unit length between the three phases A, B, and C of the 1000kV AC UHV line (hereinafter referred to as the 1000kV line) and the phase a of the low-voltage line in the same corridor are: C Aa , C Ba , C Ca and M Aa 、M Ba 、M Ca ; The self-capacitance and inductance of the low-voltage line a in the corridor relative to the ground are C a , L a ; Phase b and phase c also have similar expressions.

[0062] (2) based on the data, respectively calculating the induced voltage, induced current, electrostatic induced voltage and electromagnetic induced current data of the low-voltage lines in the same corridor;

[0063] In this embodiment, the calculation model of 1000kV AC UHV line to the low voltage line in the same corridor can be used Figure 1 Indicates (taking phase a as an example, and omitting the influence of the ground wire). In addition to being a distributed parameter circuit in the vertical direction, there is also the influence of electrostatic coupling and electromagnetic coupling of mutual capacitance and mutual inductance between lines in the horizontal direction.

[0064] ① The calculation method of the induced voltage and induced current of the low-voltage line in the same corridor is:

[0065] After considering the coupling effect of the 1000 kV AC UHV line on the low-voltage line in the same corridor, the distribution parameter equations of the voltage and current on the low-voltage line in the same corridor along the line are shown in equations (1) and (2), where G represents the influence of the ground wire of the 1000 kV line, and g represents the influence of the ground wire of the low-voltage line in the same corridor.

[0066]

[0067]

[0068] The ground wires of 1000kV AC UHV lines are mostly grounded in sections through towers. and The operating voltage and current of the 1000kV line are much larger than those of the low-voltage line in the same corridor. The impact of the low-voltage line in the same corridor on the 1000kV can be ignored. Therefore, it can be approximately considered that is a constant, i.e. the rated operating condition of the 1000kV line.

[0069] in, and All represent vectors, and the same is true below.

[0070] In this embodiment,

[0071] is the ground voltage on the high voltage side, is the ground wire current on the high voltage side, is the low voltage side ground voltage, is the low voltage side ground wire current, C AA is the self-capacitance of phase A on the high voltage side, C AB is the capacitance of the high voltage side A relative to B, C AC is the capacitance of the high voltage side A relative to C, C AG is the mutual capacitance between the high voltage side A and the ground wire; C Aa is the mutual capacitance between phase A on the high voltage side and phase a on the low voltage side, C Ag It is the mutual partial capacitance between the high voltage side A and the low voltage side ground. The meanings of other parameters are similar.

[0072] If the line mutual capacitance and mutual inductance within the three phases of the low-voltage lines abc in the same corridor are ignored, and only the line mutual capacitance and mutual inductance of the 1000 kV AC UHV line to the low-voltage line in the same corridor, as well as the self-capacitance and self-inductance of each phase conductor of the low-voltage line in the same corridor are considered, then taking phase a as an example, the distributed parameter calculation equation can be further simplified as shown in equations (3) and (4). Phases b and c have similar formulas.

[0073]

[0074]

[0075] Transmission lines are generally three-phase symmetrically operated, and the voltage and current phase angle difference of each phase is 120°, so it can be further simplified into equations (5) and (6).

[0076]

[0077]

[0078] Where l is the line length, γ is the line propagation constant, α is the line phase constant, and Z C is the wave impedance of the line, see equations (7)-(10).

[0079]

[0080]

[0081]

[0082] Among them, C Aa , C Ba , C Ca are the mutual capacitance per unit length between the three phases A, B, and C of the 1000 kV AC UHV line (hereinafter referred to as the 1000 kV line) and the phase a of the low voltage line in the same corridor; M Aa 、M Ba 、M Ca They are the mutual inductance per unit length between the A, B, and C phases of the 1000kV AC ultra-high voltage line (hereinafter referred to as the 1000kV line) and the a phase of the low-voltage line in the same corridor.

[0083] ② The calculation method of the electrostatic induction voltage of the low-voltage line in the same corridor is:

[0084] When the grounding switches at both ends of the low-voltage line in the same corridor are not grounded, Induced voltage is generated at both ends. The induced voltage of the 1000kV line on the low-voltage line in the same corridor is mainly determined by the electrostatic induction effect. From a horizontal perspective, it is similar to a circuit consisting of 10 nodes. The ABC three-phase and two ground wires of the 1000kV and the abc three-phase and two ground wires of the low-voltage line in the same corridor represent the nodes in the circuit. All ground wires are grounded, and there are independent current sources on the ABC three-phase of the 1000kV line to maintain the node voltage constant. If the capacitance matrix between the transmission lines has eliminated the influence of the ground wire, the circuit equation can be further reduced to the sixth order, as shown in equation (11):

[0085]

[0086] In the formula, the elements in the capacitance matrix C and the voltage of the 1000kV line are The unknown quantity is and That is, the electrostatic induced voltage on the low-voltage line in the same corridor. Ignoring the line-to-line mutual capacitance within the three-phase abc low-voltage line in the same corridor, only considering the line-to-line mutual capacitance of the 1000kV AC UHV line to the low-voltage line in the same corridor and assuming that the three phases are symmetrical, it can be further simplified to formula (12).

[0087]

[0088]

[0089]

[0090] Among them, C Aa , C Ba , C Ca are the mutual capacitance per unit length between the three phases A, B, and C of the UHV overhead line and the phase a of the low voltage line in the same corridor; C Ab , C Bb , C Cb are the mutual capacitance per unit length between the three phases A, B, and C of the UHV overhead line and the phase b of the low voltage line in the same corridor; C Ac , C Bc , C Cc are the mutual capacitance per unit length between the three phases A, B, and C of the UHV overhead line and the phase C of the low voltage line in the same corridor; U A , U B , U C are the A-phase, B-phase and C-phase voltages of the UHV overhead line respectively; U 1 , U 2 , U 3 They are the electrostatic induced voltages of phases a, b, and c of the low-voltage lines in the same corridor respectively;

[0091] C 0 It is the capacitance of the low-voltage line a-phase conductor to the ground in parallel with the capacitance of the low-voltage line a-phase conductor to the ground through the b-phase conductor, the c-phase conductor and the lightning conductor; C 1 C is the capacitance of the b-phase conductor of the low-voltage line to the ground and the capacitance of the b-phase conductor of the low-voltage line to the ground through the a-phase conductor, the c-phase conductor and the lightning conductor in parallel; 2 It is the parallel connection of the capacitance to ground of the c-phase conductor of the low-voltage line and the capacitance to ground of the c-phase conductor of the low-voltage line through the b-phase conductor, the a-phase conductor and the lightning arrester.

[0092] ③The calculation method of electromagnetic induction current of low-voltage lines in the same corridor is:

[0093] When the grounding switches at both ends of the low-voltage line in the same corridor are grounded, Induced current is generated at both ends. The induced voltage of the 1000kV line on the low-voltage line in the same corridor is mainly determined by electromagnetic induction. From a horizontal perspective, it is similar to a circuit with a double-winding transformer with a turns ratio of 1:1. The ABC three-phase of 1000kV corresponds to the primary side of the transformer, while the abc three-phase of the low-voltage line in the same corridor corresponds to the secondary side of the transformer, and there is a voltage source on the ABC three-phase of the 1000kV line to maintain the loop current constant. Assuming that the inductance matrix between the transmission lines has eliminated the influence of the ground wire, there is a 6th-order loop current equation, as shown in equation (13).

[0094]

[0095] In the formula, the elements in the inductance matrix M and the current of the 1000kV line are The unknown quantity is and That is the electromagnetic induced current on the low-voltage line in the same corridor.

[0096] If the line-to-line mutual inductance of the three-phase abc low-voltage line in the same corridor is ignored, and only the line-to-line mutual inductance of the 1000 kV AC UHV line to the low-voltage line in the same corridor is considered, and the three phases are considered to be symmetrical, the formula can be further simplified to (14):

[0097]

[0098]

[0099]

[0100] Among them, I′ 1 , I′ 2 , I′ 3 are the electromagnetic induction currents of phases a, b, and c of the low-voltage lines in the same corridor respectively; M Aa 、M Ba 、M Ca are the mutual inductance per unit length between the three phases ABC of the UHV overhead line and the phase a of the low voltage line in the same corridor; M Ab 、M Bb 、M Cb are the mutual inductance per unit length between the three phases A, B and C of the UHV overhead line and the phase b of the low voltage line in the same corridor; M Ac 、M Bc 、M Cc are the mutual inductance per unit length between the three phases A, B and C of the UHV overhead line and the phase C of the low voltage line in the same corridor; I A ,I B ,IC They are the A-phase, B-phase and C-phase currents of the UHV overhead line respectively; L1, L2 and L3 are the self-inductances of phases a, b and c of the low-voltage line in the same corridor respectively.

[0101] ④ The calculation method of the electrostatic induced current and electromagnetic induced voltage of the low-voltage line in the same corridor is:

[0102] When only one end of the grounding knife switch at both ends of the low-voltage line in the same corridor is grounded and The induced voltage on the ungrounded end is mainly determined by electromagnetic induction, and the induced current on the grounded end is mainly determined by electrostatic induction.

[0103] If the mutual capacitance and inductance between the three phases of the abc low-voltage lines in the same corridor are ignored, and only the mutual capacitance and inductance between the 1000 kV AC UHV lines and the low-voltage lines in the same corridor are considered and the three phases are assumed to be symmetrical, then the simplified expressions of the electrostatic induced current and electromagnetic induced voltage are shown in equations (15) and (16), respectively.

[0104] I 1 =jωl(C Aa U A +C Ba U B +C Ca U C )

[0105] I 2 =jωl(C Ab U A +C Bb U B +C Cb U C ) (15)

[0106] I 3 =jωl(C Ac U A +C Bc U B +C Cc U C )

[0107] Among them, I 1 ,I 2 ,I 3 They are the electrostatic induced currents of phases a, b, and c of the low-voltage lines in the same corridor respectively;

[0108] U′ 1 =Jωl(M Aa I A +M Ba I B +M Ca I C )

[0109] U′ 2 =jωl(M Ab I A +M Bb I B +M Cb I C ) (16)

[0110] U′ 3 =jωl(M Ac I A +M Bc I B +M Cc I C )

[0111] Among them, U′ 1 , U′ 2 , U′ 3 They are the electromagnetic induced voltages of phases a, b, and c of the low-voltage lines in the same corridor respectively.

[0112] (3) If any of the above data exceeds the corresponding threshold requirements, the UHV overhead line shall be redesigned until the above data meet the corresponding threshold requirements; so that the impact of the UHV overhead line on the low-voltage line in the same corridor is within an allowable range.

[0113] The above data include: the induced voltage and induced current of the low-voltage lines in the same corridor, the electrostatic induced voltage of the low-voltage lines in the same corridor, the electromagnetic induced current of the low-voltage lines in the same corridor, the electrostatic induced current of the low-voltage lines in the same corridor and the electromagnetic induced voltage of the low-voltage lines in the same corridor.

[0114] In this embodiment, if any of the above data exceeds the corresponding threshold requirement, the UHV overhead line can be redesigned in the following ways, specifically including:

[0115] Increase the absolute distance between UHV lines and low voltage lines;

[0116] Alternatively, reduce the effective length of UHV lines and low-voltage lines in parallel;

[0117] Alternatively, increase the phase-to-phase distance of UHV lines;

[0118] Alternatively, change the pole tower form of the UHV line, change the line layout or line phase sequence.

[0119] Of course, the above methods can also be used in combination during specific design.

[0120] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. Calculation method of induced voltage of low voltage lines in the same corridor as UHV lines, It is characterized in that include: Obtain the operating voltage and current data of the UHV overhead line and the low-voltage line in the same corridor, the mutual capacitance and mutual inductance data per unit length between the three phases ABC of the UHV overhead line and the phases a, b and c of the low-voltage line in the same corridor, and the self-capacitance and self-inductance data of the phases a, b and c of the low-voltage line in the same corridor; Based on the data, respectively calculate the induced voltage, induced current, electrostatic induced voltage and current, and electromagnetic induced voltage and current data of the low-voltage line in the same corridor; The calculation of the induced voltage and induced current of the low-voltage line in the same corridor is specifically as follows: in, is the length of the low voltage line in the same corridor, is the propagation constant of the line, is the phase constant of the line, is the wave impedance of the low voltage line; is the low line voltage, is the low voltage line voltage induced voltage, is the low voltage line current, is the low voltage line induced current, UHV line A phase voltage, UHV line A phase current, It is the self-inductance of the low-voltage line in the same corridor; , , They are the mutual inductance per unit length between the three phases A, B, and C of the UHV line and phase a of the low voltage line in the same corridor; Calculate the electrostatic induced voltage of the low-voltage line in the same corridor, specifically: ； ； ; in, , , They are the mutual capacitance per unit length between the three phases A, B, and C of the UHV overhead line and the phase a of the low voltage line in the same corridor; , , They are the mutual capacitance per unit length between the three phases A, B, and C of the UHV overhead line and the phase b of the low voltage line in the same corridor; , , They are the mutual capacitance per unit length between the three phases A, B, and C of the UHV overhead line and the phase C of the low voltage line in the same corridor; , , They are the A-phase, B-phase and C-phase voltages of the UHV overhead line respectively; , , are the electrostatic induction voltages of phases a, b, and c of the low-voltage lines in the same corridor respectively; C 0 It is the parallel connection of the capacitance of the low voltage line a phase conductor to the ground and the capacitance of the low voltage line a phase conductor to the ground through the b phase conductor, the c phase conductor and the lightning conductor; C 1 C is the capacitance of the b-phase conductor of the low-voltage line to the ground and the capacitance of the b-phase conductor of the low-voltage line to the ground through the a-phase conductor, the c-phase conductor and the lightning conductor in parallel; 2 It is the parallel connection of the capacitance of the c-phase conductor of the low-voltage line to the ground and the capacitance of the c-phase conductor of the low-voltage line to the ground through the b-phase conductor, the a-phase conductor and the lightning conductor; Calculate the electrostatic induced current of the low-voltage line in the same corridor, specifically: in, , , They are the electrostatic induced currents of phases a, b, and c of the low-voltage lines in the same corridor respectively; Calculate the electromagnetic induction voltage of the low-voltage line in the same corridor, specifically: in, , , They are the electromagnetic induction voltages of phases a, b, and c of the low-voltage lines in the same corridor respectively; Calculate the electromagnetic induction current of the low-voltage line in the same corridor, specifically: ； ； ； in, , , They are the electromagnetic induced currents of phases a, b, and c of the low-voltage lines in the same corridor respectively; , , They are the mutual inductance per unit length between the three phases ABC of the UHV overhead line and the phase a of the low voltage line in the same corridor; , , They are the mutual inductance per unit length between the three phases A, B and C of the UHV overhead line and the phase b of the low voltage line in the same corridor; , , They are the mutual inductance per unit length between the three phases A, B and C of the UHV overhead line and the phase C of the low voltage line in the same corridor; , , They are the A-phase, B-phase and C-phase currents of the UHV overhead line respectively; , , The self-inductance of phases a, b, and c of the low-voltage lines in the same corridor; If any of the above data exceeds the corresponding threshold requirements, the UHV overhead line will be redesigned until the above data all meet the corresponding threshold requirements.

2. The method for calculating the induced voltage of a low voltage line in the same corridor as an ultra-high voltage line as claimed in claim 1, It is characterized in that If any of the above data exceeds the corresponding threshold requirements, the UHV overhead line shall be redesigned, including: Increase the absolute distance between UHV lines and low voltage lines; Alternatively, reduce the effective length of UHV lines and low-voltage lines in parallel; Alternatively, increase the phase-to-phase distance of UHV lines; Alternatively, change the pole tower form of the UHV line, change the line layout or line phase sequence.

3. A system for calculating the induced voltage of low-voltage lines in the same corridor as UHV lines, It is characterized in that include: A data acquisition module is used to acquire the operating voltage and current data of the UHV overhead line and the low-voltage line in the same corridor, the mutual capacitance and mutual inductance data per unit length between the three phases ABC of the UHV overhead line and the phases a, b and c of the low-voltage line in the same corridor, and the self-capacitance and self-inductance data of the phases a, b and c of the low-voltage line in the same corridor; A data calculation module, used to calculate the induced voltage, induced current, electrostatic induced voltage and current, and electromagnetic induced voltage and current data of the low-voltage line in the same corridor based on the data; The calculation of the induced voltage and induced current of the low-voltage line in the same corridor is specifically as follows: in, is the length of the low voltage line in the same corridor, is the propagation constant of the line, is the phase constant of the line, is the wave impedance of the low voltage line; is the low line voltage, is the low voltage line voltage induced voltage, is the low voltage line current, is the low voltage line induced current, UHV line A phase voltage, UHV line A phase current, It is the self-inductance of the low-voltage line in the same corridor; , , They are the mutual inductance per unit length between the three phases A, B, and C of the UHV line and phase a of the low voltage line in the same corridor; Calculate the electrostatic induced voltage of the low-voltage line in the same corridor, specifically: ； ； ; in, , , They are the mutual capacitance per unit length between the three phases A, B, and C of the UHV overhead line and the phase a of the low voltage line in the same corridor; , , They are the mutual capacitance per unit length between the three phases A, B, and C of the UHV overhead line and the phase b of the low voltage line in the same corridor; , , They are the mutual capacitance per unit length between the three phases A, B, and C of the UHV overhead line and the phase C of the low voltage line in the same corridor; , , They are the A-phase, B-phase and C-phase voltages of the UHV overhead line respectively; , , are the electrostatic induction voltages of phases a, b, and c of the low-voltage lines in the same corridor respectively; C 0 It is the parallel connection of the capacitance of the low voltage line a phase conductor to the ground and the capacitance of the low voltage line a phase conductor to the ground through the b phase conductor, the c phase conductor and the lightning conductor; C 1 C is the capacitance of the b-phase conductor of the low-voltage line to the ground and the capacitance of the b-phase conductor of the low-voltage line to the ground through the a-phase conductor, the c-phase conductor and the lightning conductor in parallel; 2 It is the parallel connection of the capacitance of the c-phase conductor of the low-voltage line to the ground and the capacitance of the c-phase conductor of the low-voltage line to the ground through the b-phase conductor, the a-phase conductor and the lightning conductor; Calculate the electrostatic induced current of the low-voltage line in the same corridor, specifically: in, , , They are the electrostatic induced currents of phases a, b, and c of the low-voltage lines in the same corridor respectively; Calculate the electromagnetic induction voltage of the low-voltage line in the same corridor, specifically: in, , , They are the electromagnetic induction voltages of phases a, b, and c of the low-voltage lines in the same corridor respectively; Calculate the electromagnetic induction current of the low-voltage line in the same corridor, specifically: ； ； ； in, , , They are the electromagnetic induced currents of phases a, b, and c of the low-voltage lines in the same corridor respectively; , , They are the mutual inductance per unit length between the three phases ABC of the UHV overhead line and the phase a of the low voltage line in the same corridor; , , They are the mutual inductance per unit length between the three phases A, B and C of the UHV overhead line and the phase b of the low voltage line in the same corridor; , , They are the mutual inductance per unit length between the three phases A, B and C of the UHV overhead line and the phase C of the low voltage line in the same corridor; , , They are the A-phase, B-phase and C-phase currents of the UHV overhead line respectively; , , The self-inductance of phases a, b, and c of the low-voltage lines in the same corridor; The threshold judgment module is used to redesign the UHV overhead line if any of the above data exceeds the corresponding threshold requirement until the above data all meet the corresponding threshold requirement.

4. The system for calculating the induced voltage of a low voltage line in the same corridor as an ultra-high voltage line as claimed in claim 3, It is characterized in that If any of the above data exceeds the corresponding threshold requirements, the UHV overhead line shall be redesigned, including: Increase the absolute distance between UHV lines and low voltage lines; Alternatively, reduce the effective length of UHV lines and low-voltage lines in parallel; Alternatively, increase the phase-to-phase distance of UHV lines; Alternatively, change the pole tower form of the UHV line, change the line layout or line phase sequence.

5. A terminal device comprising a processor and a memory, wherein the processor is used to implement each instruction; and the memory is used to store multiple instructions. It is characterized in that The instructions are suitable for being loaded by a processor and executing the method for calculating the induced voltage of a low-voltage line in the same corridor as an ultra-high voltage line as described in any one of claims 1-2.

6. A computer-readable storage medium having a plurality of instructions stored therein, It is characterized in that The instruction is suitable for being loaded by a processor of a terminal device and executing the method for calculating the induced voltage of a low-voltage line in the same corridor as an ultra-high voltage line as described in any one of claims 1-2.

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