73 results about "Propagation constant" patented technology

The invention discloses a self-adaptive impedance matching method for a high-frequency signal transmission connector of a new energy vehicle, and relates to the technical field of signal processing, and the method comprises the steps: 1, obtaining the physical parameters of the high-frequency signal transmission connector of the new energy vehicle; calculating an electromagnetic field feature vector, and calculating a transmission line distribution vector of the high-frequency signal transmission connector; 2, calculating a propagation constant of a high-frequency signal transmission connector of the new energy vehicle; calculating the characteristic impedance of a high-frequency signal transmission connector of the new energy vehicle; 3, calculating a reflection coefficient; calculating an impedance error; step 4, calculating a compensation parameter vector, and generating a control signal by using an adaptive control theory according to the compensation parameter vector; and calculating the impedance matching degree according to the control signal. According to the invention, impedance change in a complex environment can be accurately dealt with, signal reflection and energy loss are significantly reduced, and transmission efficiency and signal integrity are improved.

The invention discloses a medium metasurface reverse optimization method based on a space coupling mode theory, and relates to the field of optics, and the method comprises the following steps: building a cut-off waveguide array based on a metasurface, calculating a guided mode and a propagation constant of each waveguide according to the cut-off waveguide array, and coupling adjacent waveguides through a coupling matrix, a waveguide array is obtained; an input light field is coupled into a waveguide array, propagation of light in waveguides is simulated based on a spatial coupling mode theory model, and near-field intensity distribution is converted into far-field intensity distribution by using a Rayleigh-Sommerfeld diffraction theory; and calculating the difference between the target intensity and the far-field intensity through a loss function, evaluating the effect of the current metasurface design, and gradually adjusting the geometric parameters of the waveguide unit through an optimization algorithm. According to the method, the problems of efficient modeling and optimization in metasurface design are solved through the space coupling mode theoretical model.

The invention relates to the technical field of antenna control, and discloses a control method for a leaky-wave antenna and a communication device. The method comprises the following steps: measuring the dispersion characteristic of the leaky-wave antenna, establishing a second-order nonlinear mapping relation between a propagation constant and a control voltage, and obtaining a dispersion control parameter group; reversely deducing the target beam directional angle to obtain a target propagation constant, and calculating an initial voltage value of each control unit in combination with the parameter group to form a voltage gradient control sequence; correcting the propagation constant of each unit by adopting a distance compensation algorithm, and recalculating to obtain distance self-adaptive voltage distribution data; and detecting a beam quality factor in real time, updating voltage distribution data through a gradient descent algorithm when the beam quality factor deviates from a target value, and outputting a control voltage sequence to drive each control unit. The leaky-wave antenna control method and device solve the problems that in an existing leaky-wave antenna control technology, the beam quality is reduced and the data rate is sharply attenuated during long-distance transmission, and the beam control precision and the long-distance transmission performance of the leaky-wave antenna in the terahertz frequency band are improved.

The invention belongs to the technical field of cable insulation evaluation, and provides an on-service cable insulation evaluation method and system fused with multivariate target optimization in order to solve the problem that it is difficult to comprehensively and accurately evaluate the cable insulation state in the prior art. The active service cable insulation evaluation method fused with multivariate target optimization comprises the following steps: determining a time domain incident signal and a frequency domain incident signal; variational mode decomposition is carried out on the measured time domain reflection signal to obtain a time domain actual reflection signal; designing a cable propagation filter by using an initial propagation constant, and estimating a time domain reflection signal by combining a frequency domain incident signal; determining a target function according to energy and position differences between the estimated time domain reflection signal and the actual time domain reflection signal, and optimizing a propagation constant in a set range to minimize a target function value under each frequency; and calculating a dielectric loss factor according to the optimized relationship between the propagation constant and the dielectric constant, and evaluating the cable insulativity.

The invention discloses a microwave dielectric constant measurement method, system and device and a storage medium, and relates to the field of measurement. In the method, a to-be-tested material is placed between a transmitting antenna and a receiving antenna, an incident angle is adjusted to a preset value, and a signal source is arranged to transmit a first electromagnetic wave signal and receive a second electromagnetic wave signal; calculating an amplitude ratio of the first electromagnetic wave signal to the second electromagnetic wave signal, and calculating a phase difference between the first electromagnetic wave signal and the second electromagnetic wave signal; constructing a waveguide transmission model according to the to-be-measured material, and calculating the characteristic impedance and the propagation constant of a transmission line of the waveguide transmission model according to the size and the working frequency of a waveguide in the waveguide transmission model and the thickness of the to-be-measured material; and constructing an equation set according to the amplitude ratio, the phase difference, the characteristic impedance and the propagation constant, and solving to obtain the microwave dielectric constant. By implementing the technical scheme provided by the invention, the dielectric constant can be accurately measured.

A non-interferometric thin film lithium niobate electro-optical modulator for data transmission including a laser, configured to generate an input continuous wave light beam; a non-interferometric thin film lithium niobate modulator including an optical waveguide situated along with the coplanar transmission lines and the DC bias conductors. The propagation constant of the optical waveguide is tuned and modulated by the RF data signal and the DC bias voltage traveling on the coplanar transmission lines and the DC bias conductors. The modulator can be tuned at quadrature point by the DC bias voltage. The optical power can be modulated by the RF data signal travelling on the coplanar transmission line; a low noise RF amplifier for data signal amplification; and a bias tee for combining the data signal and DC bias voltage and send them to the coplanar transmission lines.

A matrix solution method for electromagnetic simulation and a computer device are disclosed. According to the method, a propagation constant of the two-dimensional wave port and field distribution matched with the propagation constant are determined by simplifying and solving a generalized eigenvalue problem formed by a stiffness matrix and a mass matrix of the two-dimensional wave port, and the stiffness matrix and the mass matrix have the same dimension. The method comprises the following steps: initializing a first matrix and a second matrix based on a preset number of propagation constants; determining a first parameter and a second parameter based on the initial vector, the stiffness matrix and the mass matrix; determining a residual vector and a third parameter based on the initial vector, the stiffness matrix, the mass matrix, the first parameter and the second parameter; iteratively updating the initial vector, the first parameter, the second parameter and the third parameter for multiple times so as to update the first matrix and the second matrix; and solving the first matrix and the second matrix to obtain a propagation constant of the two-dimensional wave port and field distribution matched with the propagation constant. In this way, memory occupation is reduced, and the matrix solving efficiency is improved.

The invention relates to the field of power line channel modeling, in particular to a power line channel modeling method, system, equipment and medium, power line channel data is actually measured and collected and preprocessed, channel characteristics are extracted, parameters such as characteristic impedance and propagation constant of a power line are calculated by using a transmission line theory, and the power line channel is modeled. Constructing an enhanced conditional generative adversarial network comprising a generator and a discriminator, inputting parameters obtained by theoretical calculation of a transmission line as conditional information in a training process, optimizing structures and loss functions of the generator and the discriminator, enabling the generator to generate a high-quality analog channel sample, fusing a deep learning model with a transmission line theoretical model, and obtaining a high-quality analog channel sample; according to the method, a mixed channel model is formed, model parameters are alternately trained and optimized, accurate prediction of transmission characteristics of the power line channel is realized, complex characteristics of the power line channel can be effectively modeled, and a reliable basis is provided for design optimization of a power line communication system.

An optical multiplexing and demultiplexing method of the present disclosure includes arranging, face to face, a polished surface of a coated optical fiber whose side surface is polished to a core or a vicinity of the core and a polished surface of an optical waveguide whose propagation constant varies in a longitudinal direction and whose side surface is polished to a core or a vicinity of the core, and aligning the polished surface of the coated optical fiber and the polished surface of the optical waveguide so that desired branching ratio is obtained from one end of the coated optical fiber to the end, distal to the former end, of the optical waveguide by relatively moving the polished surface of the coated optical fiber and the polished surface of the optical waveguide.

The present invention discloses a closed-loop polarization-protected optical fiber temperature sensor with a linear structure, belonging to the field of optical fiber temperature sensors. The sensor comprises: transmitting two orthogonal polarized lights through the fast and slow axes, modulating the two orthogonal polarized lights with a preset modulation signal, rotating the two orthogonal polarized lights by 45 degrees, and transmitting the two orthogonal polarized lights, spliced ​​together through a 45-degree optical fiber connector, at different speeds through the optical fiber fast and slow axes. The difference in propagation constants of the two orthogonal polarized lights within the PM sensing fiber is proportional to the temperature. The two orthogonal polarized lights are reflected and returned along their original paths, and the orthogonal polarized lights output by the fast and slow axes are exchanged to generate an output optical signal, which is then demodulated and calculated to obtain the current temperature. Thus, the sensor utilizes a reciprocal structure to suppress noise and interference in the optical path, overcoming the defect that the system's cosine response is insensitive to small temperature changes. Accurate measurements can be provided in microwave, radio frequency, and electromagnetic interference environments.

To provide an irreversible transmission line having a two-dimensional structure and capable of uniformly distributing an electromagnetic field in a two-dimensional plane.SOLUTION: An irreversible transmission line includes first and second transmission lines that are orthogonal to each other by configuring basic cells having two transmission line portions that are orthogonal to each other and have parallel branch circuits so as to be juxtaposed and cascaded in orthogonal first and second directions. The transmission line part at a position other than an intersection point of the first and second transmission lines is formed of a material magnetized by spontaneous magnetization or the like so as to have gyro anisotropy by being magnetized in a different direction with respect to a propagation direction of a microwave. In a dispersion curve indicating a relationship between an operating frequency of a microwave signal input to each transmission line and a propagation constant of each transmission line, at least one of the parallel branch circuits of each transmission line is configured such that a wave component propagating along each of the parallel branch circuits in a longitudinal direction of each transmission line has an irreversible characteristic and is asymmetrical with respect to the transmission line portion.SELECTED DRAWING: Figure 5

The invention provides a design method of a wave-absorbing material based on fractal geometry, the wave-absorbing material is formed by periodically arranging three-dimensional unit cell structures in a plane, and the unit cell structures are layered structures; comprising the following steps: determining an impedance gradient correction coefficient of each layer of a unit cell structure according to layer structure parameters and fractal dimensions of the unit cell structure of the wave-absorbing material; determining equivalent electromagnetic parameters of each layer of the unit cell structure according to the intrinsic electromagnetic parameters of each layer and the layer structure parameters; determining a complex propagation constant and an intrinsic impedance of each layer of the unit cell structure by using the equivalent electromagnetic parameter and the working frequency; the input impedance of the surface layer of the unit cell structure is determined by using the impedance gradient correction coefficient, the complex propagation constant, the intrinsic impedance and the layer structure parameters of each layer of the unit cell structure, and then the surface reflectivity and the reflection loss are determined; judging whether the wave-absorbing material meets the working frequency band index requirement or not, if not, continuing to optimize the unit cell structure until the unit cell structure meets the working frequency band index requirement, and completing the design of the wave-absorbing material.

The application provides a design method of a wave-absorbing material based on fractal geometry, the wave-absorbing material is composed of a periodic arrangement of a three-dimensional unit cell structure in a plane, and the unit cell structure is a layered structure; the method comprises the following steps: determining impedance gradient correction coefficients of each layer of the unit cell structure according to layer structure parameters and a fractal dimension of the unit cell structure of the wave-absorbing material; determining equivalent electromagnetic parameters of each layer of the unit cell structure according to intrinsic electromagnetic parameters and layer structure parameters of each layer; determining complex propagation constants and intrinsic impedances of each layer of the unit cell structure by using the equivalent electromagnetic parameters and a working frequency; determining an input impedance of a surface layer of the unit cell structure by using the impedance gradient correction coefficients, the complex propagation constants, the intrinsic impedances and the layer structure parameters of each layer of the unit cell structure, and then determining surface reflectivity and reflection loss; determining whether the wave-absorbing material meets working frequency band index requirements, and if not, continuously optimizing the unit cell structure until the unit cell structure meets the working frequency band index requirements, and completing the design of the wave-absorbing material.

The invention belongs to the technical field of integrated photoelectronics, and particularly relates to a design method of an adiabatic coupler based on equation correction. The method comprises the following steps: step 1, obtaining effective refractive indexes of intrinsic modes in a coupled waveguide system and an uncoupled waveguide system through analogue simulation; step 2, the value of ne-no-n2-n1 is calculated; 3, correcting the effective refractive index of the intrinsic mode in the uncoupled waveguide system; 4, calculating a propagation constant beta; 5, calculating the coupling strength kappa between the first silicon core and the second silicon core; step 6, fragment length calculation; and 7, calculating the power transmission efficiency and determining the final device length. According to the design method, the device size of the thermal insulation coupler is greatly reduced, and the miniaturization design in a photonic integrated chip can be realized.

A system including a mode coupler has at least one waveguide section connected between a mode coupler input and a mode coupler output. The waveguide section supports a set of guided coupler modes and a set of cutoff coupler modes, and has a transverse refractive index profile and a longitudinal refractive index profile. The transverse refractive index profile is adjusted by free-form optimization to yield a set of desired spacings between a set of propagation constants of the sets of coupler modes such that the longitudinal refractive index profile induces desired couplings between the guided coupler modes, while inhibiting undesired couplings between the guided coupler modes and the cutoff coupler modes, and undesired couplings between the guided coupler modes.

The present disclosure relates to a method for obtaining a wave speed or propagation velocity in a power grid comprising a transmission line connected between two buses comprising determining a voltage and current at at least one bus, determining a propagation constant5 using the voltage and the current, determining line parameters based on the propagation constant and determining a wave speed or propagation velocity based on the line parameters. The disclosure also relates to a corresponding storage medium, device and power grid.

The invention discloses a broadband self-imaging device based on combined waveguide induced zigzag gradient scalar potential, a preparation method and application, and belongs to the technical field of laser processing, the broadband self-imaging device comprises n periodically arranged imaging units, each imaging unit comprises m combined waveguides, and the coupling distance between the adjacent combined waveguides is d; each combined waveguide is formed by splicing two waveguides with circular cross sections at a center-to-center distance a; in a single imaging unit, the center distance a of the combined waveguides is gradually increased from the first waveguide to the mth waveguide at a fixed step length, so that the propagation constant beta of the combined waveguides is in gradient distribution, a propagation constant gradient delta beta is formed in each imaging unit, Bloch oscillation can be triggered when optical signals are transmitted in the imaging units, and when the optical signals are transmitted to LBloch, the propagation constant gradient delta beta is not changed. And the wave packet shrinks to a light field distribution state which is the same as that of the initial input light signal, so that self-imaging is realized. The periodically distributed zigzag gradient potential is introduced into the waveguide array by using the combined waveguides with different center distances, the self-imaging waveguide array can be expanded infinitely and periodically, and large-scale and multi-channel parallel signal transmission can be realized.

An optical-side input / output circuit (10) comprises: a grating part (20) including a grating (21) formed in a core (11) of an optical fiber (13); and a tap part (30) including a tap waveguide (31) that branches from the core (11). When viewed from the extension direction of the optical fiber (13), the grating (21) is unevenly distributed in the core (11), and the distance (D) from the grating (21) to the tap part (30) is set to a value calculated from a beat length found from a propagation constant of light in two LP 11 modes that are mutually orthogonal and that can propagate through the core (11).

The embodiment of the invention provides a data processing method, device and equipment applied to cable insulation aging monitoring. The method comprises the following steps: acquiring initial geometric parameters of a clamp, acquiring temperature data of the clamp, and acquiring an initial reflection coefficient of electromagnetic waves between an insulating sheet of a cable and air; correcting the initial geometric parameters according to the temperature data to obtain corrected geometric parameters, and determining corrected characteristic impedance and a corrected propagation constant according to the corrected geometric parameters; according to the corrected geometric parameters, the corrected characteristic impedance, the corrected propagation constant and the initial reflection coefficient, the intrinsic impedance of the insulating sheet is determined; determining a complex dielectric constant of the insulating sheet according to the intrinsic impedance, and determining an insulation aging index according to the complex dielectric constant; wherein the insulation aging index is used for monitoring the insulation aging degree of the cable. The method is used for achieving the effect of improving the accuracy of cable insulation aging monitoring.

The invention discloses a miniaturized metasurface broadband wide-angle scanning circularly polarized antenna, and belongs to the technical field of antennas. A wide-angle scanning phased-array antenna can be formed by using the miniaturized metasurface broadband wide-angle scanning circularly polarized antenna as a unit. The miniaturized metasurface broadband wide-angle scanning circularly polarized antenna comprises three layers of dielectric plates, four metal layers and a group of metalized via holes. And by utilizing the non-linear characteristic of a metasurface dispersion curve, the first-order resonant frequency and the second-order resonant frequency are fused to realize broadband radiation. The metasurface antenna is miniaturized by increasing the propagation constant, so that the array element spacing in the array is reduced, and wide-angle scanning is realized. The invention has the characteristics of few layers, small size, large bandwidth, wide-angle scanning and the like.

A stacked resonant antenna array structure with a slow wave effect includes: an antenna unit layer, a metal ground unit layer and a feed unit layer arranged in sequence, wherein: a plurality of stacked resonant antenna subunits are arranged in parallel in the antenna unit layer, and the stacked resonant antenna subunits form an array along a straight line; a plurality of rectangular gaps are arranged on the metal ground unit layer to couple the signal to the stacked resonant antenna subunits; a coplanar waveguide, a strip line and a vertical switching structure therebetween are arranged in the feed unit layer. The present invention significantly improves the propagation constant of the rectangular resonant cavity in the vertical direction by arranging periodically arranged metal diaphragms inside the rectangular resonant cavity, thereby reducing the antenna aperture and making the antenna unit more compact. At the same time, by loading short branches on the metal feeder, the impedance matching of the stacked antenna unit is improved.

A high-conversion-efficiency integrated frequency comb device (100; 200; 310a – 310c) comprises at least one micro-resonator (120; 220) configured to receive pump laser light from at least one pump laser source, convert at least partially the received pump laser light for generating a laser frequency comb, and output frequency comb light based on the produced laser frequency comb. The micro-resonator (120; 220) comprises at least one closed-circuit waveguide (122; 222) integrated in a semi-conductor topography of the micro-resonator (120; 220). The closed-circuit waveguide (122; 222) comprises at least one structure for producing periodic perturbation (124; 224) configured to produce mode hybridization via coupling of forwards and backwards travelling modes in the closed-circuit waveguide (122; 222) by means of rapid, in particular sub-wavelength, modulation of a propagation constant of light propagating in the closed-circuit waveguide (122; 222). The structure for producing periodic perturbation (124; 224) has been designed with respect to at least one of an intended width, in terms of comb lines, of the frequency comb and / or an intended intensity distribution within a target width, in terms of comb lines, of the frequency comb, based at least partially on the stipulation that a dispersion-loss operator to achieve an ideally flat microcomb according to an exact solution of a generalized Lugiato-Lefever Equation exists in the form [iD+K], and, as a function of resonator mode index μ, the dispersion-loss operator takes the following generic form: wherein a, b, c, d 3 ... d ∞ , h, p, q, r, s, u 3 , u ∞ are constants, and μ ≤ N / 2 for N being the number of intended comb lines apart from a potential comb line corresponding to the pump laser light.

The invention discloses a holographic exposure method for manufacturing an optical waveguide, the optical waveguide and a display device. A coupling-in holographic grating, a folding holographic grating and a coupling-out holographic grating are sequentially arranged on the optical waveguide along an optical path; the holographic exposure method comprises the steps of establishing a space coordinate system according to an optical waveguide; calculating propagation constants of two beams of coherent light coupled into the holographic grating to obtain a first array; calculating a propagation constant of the incident light to obtain a second array; calculating an incident array based on the first array and the second array; calculating a propagation constant of emergent light on the folded holographic grating based on the position coordinates of the folded holographic grating and the coupled-out holographic grating to obtain an emergent array; and dividing the folded holographic grating based on the incident array and the emergent array to obtain N exposure partitions with different exposure angles, N being a positive integer. By partitioning the folded holographic grating and setting different exposure angles, the utilization rate of light energy is improved.

The invention provides a circuit board measuring piece set and a circuit board measuring method. The circuit board measurement method comprises the following steps: measuring a first measurement scattering parameter of a first measurement circuit board through a single port; measuring a second measurement scattering parameter of the second measurement circuit board through the single port; measuring a third measurement scattering parameter of a third measurement circuit board through a single port; according to the first measurement scattering parameter, the second measurement scattering parameter and the third measurement scattering parameter, calculating a characteristic impedance value, a tail end inductance impedance value and a propagation constant of the coaxial through hole of the circuit board; according to the circuit board measuring piece group and the circuit board measuring method, the electrical parameter of the coaxial through hole can be calculated by using the single-port measuring result, so that a reliable and simple verification tool and method are provided.

The present application discloses an antenna, a communication device, and an electromagnetic wave radiation method, belonging to the field of communication technologies. The antenna includes a radiation structure (7) and a feeding structure (9); the feeding structure (9) is configured to feed the radiation structure (7) to enable the shaft portion (71) and the rod portion (72) to alternately radiate electromagnetic waves. Among them, the radiation structure (7) includes: a shaft portion (71) and a plurality of rod portions (72), the shaft portion (71) is connected to the rod portion (72), the plurality of rod portions (72) are arranged in sequence along the length direction of the shaft portion (71), and the electromagnetic wave propagation constant of the radiation structure (7) is greater than the electromagnetic wave propagation constant of free space; the shaft portion (71) is configured to radiate electromagnetic waves to a plane perpendicular to the shaft portion (71), and the rod portion (72) is configured to radiate electromagnetic waves to a plane perpendicular to the rod portion (72). The antenna provided by the present application can radiate electromagnetic waves to different planes, thus enriching the functions of the antenna.

The invention belongs to the technical field of integrated photoelectronics, and particularly relates to an optical waveguide device based on a uniform adiabatic degree criterion. The physical contour of the optical waveguide device is a direct materialization or projection of a uniform adiabatic degree criterion in a three-dimensional space, and a curve of a geometric gradient rate dw / dz of the physical contour is completely consistent with a curve of a propagation constant difference delta beta (z) of an interaction mode in the device in form; at places with large delta beta (z), namely the two ends, the structure changes severely; and the structure change is extremely gentle in a place with small delta beta (z), namely a mode hybridization region. According to the method, the device design is improved from geometric fitting to physical criterion driving for the first time. Because each point of the device is in an appropriate'critical adiabatic 'state, no length of any micrometer is wasted on'excessive adiabatic'. This ensures that the total length of the device approaches the theoretically minimum size under a given performance index.

The application provides a flexible direct current line frequency variable parameter identification method and system, belongs to the parameter identification technical field of power grid transmission lines, and changes the number and state of equivalent redundant sub-modules input by each bridge arm; according to the number and state of the input half-bridge sub-modules, a voltage characteristic signal of a direct current line is injected; according to the injected voltage characteristic signal, in combination with a mathematical model of a distributed parameter transmission line, characteristic impedance, propagation constant and attenuation constant corresponding to the frequency of the injected voltage characteristic signal are calculated; and according to the characteristic impedance at different frequencies calculated by injecting voltage characteristic signals at different frequencies for multiple times, the characteristic impedance in the full frequency domain is fitted. The application solves the problem that parameters are difficult to obtain due to the absence of a stable fundamental frequency in a direct current system, and improves the frequency variable parameter identification precision of the flexible direct current line.

The invention discloses a two-port radio frequency device de-embedding method. The method comprises the following steps: calculating characteristic impedance and a propagation constant of a transmission line of a section corresponding to a port through a two-dimensional section solver; calculating an equivalent electromagnetic wave wavelength at the port according to the propagation constant; modifying an original layout, and expanding a port outwards by the length of a half wavelength; setting excitation at a port of the expanded layout, and simulating through a moment method to obtain scattering parameters of a device corresponding to the layout at the moment; and stripping the influence of the added transmission line through matrix operation to obtain a scattering parameter of a device corresponding to the original layout so as to finish a de-embedding process. The invention also discloses a device based on the method, electronic equipment and a storage medium. According to the method, the influence of the lumped excitation source on the scattering parameters of the radio frequency device in the moment method simulation process can be effectively stripped, so that the simulation result is more accurate.

The optical fiber is formed to include a special cladding layer that has a change in refractive index with taper associated with the out-diffusion of an index-decreasing dopant contained in the cladding layer. The change in refractive index (propagation constant) is sufficient to maintain the local taper angle relationship and to prevent loss oscillations from occurring as the taper length is extended to a desired value. In particular, the special cladding layer can be formed to include a sufficient concentration of an index-decreasing dopant, such as fluorine (F), which is known to diffuse faster than the index-increasing dopants (e.g., one or more of Ge, Cl, and P) of conventional cladding layers.

The invention provides a method for accurately calculating distribution characteristics of voltage along a line aiming at series charging of an ultrahigh-voltage transmission line, which comprises the following steps of: firstly, calculating line wave impedance and propagation constants based on line power frequency lumped parameters or distribution parameters; calling a voltage load flow calculation result of any one of the head end, the series charging point and the tail end of the series charging line in the load flow simulation result of the power system; secondly, considering the position of a line parallel high-voltage reactor, and calculating voltage distribution and head end current along a second section of line according to a voltage reading result; then, calculating the tail end current of the first section of line and the voltage distribution along the first section of line; and finally, drawing a voltage distribution curve along the series charging line, and returning the highest value of the voltage along the line and the corresponding position. The method can quickly and accurately calculate the voltage distribution curve along the series charging line of the ultrahigh-voltage transmission line when the parallel high-voltage reactor of the line is located at different positions of the series charging line, and can effectively avoid the damage of overvoltage along the line to the insulation of power equipment during debugging.