An equivalent simulation method, circuit and medium for umbilical cable power transmission characteristics

Abstract

The application discloses an equivalent simulation method of umbilical cable power transmission characteristics, a circuit and a medium, and relates to the technical field of long-distance umbilical cable transmission. The method comprises the following steps: acquiring cable parameters corresponding to a unit length of umbilical cable, and determining effective circuit parameters by skin effect analysis based on the cable parameters; performing transfer update analysis on the effective circuit parameters to obtain a characteristic impedance coefficient; performing cable loss calculation on the cable parameters to determine cable characteristic loss; according to the characteristic impedance coefficient and the cable characteristic loss, performing attenuation trend analysis of long-distance transmission to obtain a standing wave ratio parameter; and performing high-frequency signal attenuation calculation on the cable characteristic loss and the standing wave ratio parameter to determine umbilical cable transmission attenuation data. The application solves the technical problem of insufficient simulation precision of long-distance umbilical cable power signal transmission characteristics in the prior art by the above method, and can accurately predict the power attenuation and high-frequency signal attenuation process of the umbilical cable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of long-distance umbilical cable transmission, and particularly relates to an equivalent simulation method, a circuit and a medium for power transmission characteristics of an umbilical cable. BACKGROUND

[0002] As the key equipment connecting surface facilities and underwater production systems, umbilical cables integrate functions such as hydraulic power, electricity, communication and chemical injection, and are the lifeline of deep-sea oil and gas development. In recent years, with the development of the ocean to deep water and ultra-deep water, the umbilical cable technology has evolved from simple functions to high integration, and mainstream structures such as steel pipe umbilical cables and dynamic umbilical cables have emerged. The length of the cable body has gradually developed towards long-distance transmission.

[0003] The existing umbilical cable power transmission characteristic simulation device can only accurately simulate the power transmission characteristics of short-distance umbilical cables, and once it involves long-distance scenarios, the problem of insufficient simulation accuracy will be highlighted. On the one hand, the reason is that the existing umbilical cable power transmission characteristic mathematical model has limitations in accuracy, especially in the high-frequency signal attenuation aspect, the calculation result has a significant deviation from the actual umbilical cable attenuation value. The existing model only takes into account the conductor loss and dielectric loss when modeling, but ignores the current skin effect, reflection and standing wave phenomenon caused by impedance mismatch, as well as the variation law of inductance and resistance with temperature, which all aggravate the loss of high-frequency signals. On the other hand, the existing equivalent circuit model has a gain phenomenon when simulating high-frequency signal transmission, and neither the role of electric conductance nor the influence of the arrangement order of capacitance and inductance on high-frequency signal attenuation is considered in the modeling process, resulting in limited simulation accuracy. SUMMARY

[0004] The present application provides an equivalent simulation method, a circuit and a medium for power transmission characteristics of an umbilical cable, which solves the technical problem of insufficient simulation accuracy of long-distance umbilical cable power signal transmission characteristics in the prior art.

[0005] In a first aspect, the present application provides an equivalent simulation method for power transmission characteristics of an umbilical cable, characterized in that the method comprises: obtaining cable line parameters corresponding to a unit length of the umbilical cable, and determining effective circuit parameters based on the cable line parameters through skin effect analysis; performing transfer update analysis on the effective circuit parameters to obtain a characteristic impedance coefficient; performing cable line loss calculation on the cable line parameters to determine cable line characteristic loss; according to the characteristic impedance coefficient and the cable line characteristic loss, performing long-distance transmission attenuation trend analysis to obtain a standing wave ratio parameter; and performing high-frequency signal attenuation calculation on the cable line characteristic loss and the standing wave ratio parameter to determine umbilical cable transmission attenuation data.

[0006] In an implementation manner of the present application, based on the cable parameters, the effective circuit parameters are determined through the skin effect analysis, specifically including: performing transmission demand configuration on the cable parameters to obtain a cable cutoff frequency; based on the cable cutoff frequency and the resistance of the unit length cable, the effective resistance parameters corresponding to the unit length umbilical cable are calculated; according to the cable cutoff frequency, the cable reference frequency is determined through the skin effect intensity control; wherein the cable reference frequency is used to control the skin effect intensity to adapt to the transmission characteristics of umbilical cables of different lengths; based on the cable reference frequency, the effective inductance parameters corresponding to the unit length umbilical cable are calculated; and according to the effective resistance parameters and the effective inductance parameters, the effective circuit parameters are determined.

[0007] In an implementation manner of the present application, the effective circuit parameters are analyzed for transmission update to obtain the characteristic impedance coefficient, specifically including: obtaining the attenuation constant and the phase constant, and based on the attenuation constant, the phase constant and the effective circuit parameters, the propagation constant update data are obtained through the effective signal propagation dynamic analysis; according to the propagation constant update data, the attenuation constant and the phase constant are updated; based on the updated attenuation constant and the phase constant, the characteristic impedance coefficient is obtained.

[0008] In an implementation manner of the present application, the cable parameters are analyzed for cable loss calculation to determine the cable characteristic loss, specifically including: performing cable medium loss analysis on the cable parameters to determine the medium loss factor; performing cable transmission resistance analysis on the cable parameters to determine the conductor loss factor; and according to the medium loss factor and the conductor loss factor, the cable characteristic loss is determined.

[0009] In an implementation manner of the present application, according to the characteristic impedance coefficient and the cable characteristic loss, the standing wave ratio parameter is obtained through the attenuation trend analysis of long distance transmission, specifically including: performing cable continuation calculation on the characteristic impedance coefficient to obtain a characteristic impedance coefficient set of continuous segments; based on the characteristic impedance coefficient set, the reflection coefficient corresponding to the continuous segments is calculated; and according to the reflection coefficient, the standing wave ratio parameter is determined through the standing wave ratio calculation.

[0010] In an implementation manner of the present application, the cable characteristic loss and the standing wave ratio parameter are calculated for high frequency signal attenuation to determine the umbilical cable transmission attenuation data, specifically including: obtaining the umbilical cable length, and based on the cable characteristic loss and the umbilical cable length, the cable characteristic total loss is calculated; the standing wave loss is determined by performing integral calculation on the standing wave ratio parameter for the umbilical cable length; and according to the cable characteristic total loss and the standing wave loss, the umbilical cable transmission attenuation data is determined.

[0011] In an implementation form of the present application, after the cable characteristic loss and the standing wave ratio parameter are calculated by high-frequency signal attenuation to determine umbilical cable transmission attenuation data, the method further comprises: determining the remote device voltage by umbilical cable total pressure drop calculation based on the umbilical cable transmission attenuation data; performing voltage operating range verification on the remote device voltage to obtain transmission requirement parameters; and determining transmission configuration data by umbilical cable transmission optimization according to the transmission requirement parameters.

[0012] In an implementation form of the present application, after the transmission configuration data is determined by umbilical cable transmission optimization according to the transmission requirement parameters, the method further comprises: determining signal transmission configuration parameters by transmission signal bandwidth optimization based on the transmission configuration data; and obtaining signal transmission optimization configuration parameters by dispersion timing budget according to the signal transmission configuration parameters.

[0013] In a second aspect, the embodiments of the present application further provide an equivalent simulation circuit of umbilical cable power transmission characteristics, characterized in that the circuit comprises: a capacitor and a conductance in parallel; wherein the capacitor and the conductance are connected in parallel in front of a resistor; the resistor is symmetrically arranged on both sides of the circuit; wherein the rear of the resistor is provided with an inductor, and the inductor is also symmetrically arranged on both sides of the circuit; the capacitor and the conductance are connected to a power carrier transmission circuit; and the inductor is connected to a power carrier receiving circuit.

[0014] In a third aspect, the embodiments of the present application further provide a non-volatile computer storage medium for equivalent simulation of umbilical cable power transmission characteristics, which stores computer executable instructions, characterized in that the computer executable instructions are configured to: obtain cable parameters corresponding to a unit length of umbilical cable, and determine effective circuit parameters by skin effect analysis based on the cable parameters; perform transfer update analysis on the effective circuit parameters to obtain characteristic impedance coefficients; perform cable loss calculation on the cable parameters to determine cable characteristic loss; obtain standing wave ratio parameters by long-distance transmission attenuation trend analysis according to the characteristic impedance coefficients and the cable characteristic loss; and perform high-frequency signal attenuation calculation on the cable characteristic loss and the standing wave ratio parameters to determine umbilical cable transmission attenuation data.

[0015] The embodiments of the present application provide an equivalent simulation method, circuit and medium for umbilical cable power transmission characteristics, which solves the technical problem of insufficient simulation precision of long-distance umbilical cable power signal transmission characteristics in the prior art by constructing a long-distance umbilical cable power attenuation mathematical model and an equivalent circuit through loss calculation corresponding to the reflection coefficient and the standing wave ratio, combining the dielectric loss and the conductor loss, and realizes accurate prediction of the power attenuation and the high-frequency signal attenuation process of the umbilical cable on the physical layer, and improves the prediction precision of the power attenuation and the signal interference of the umbilical cable. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0017] Figure 1 A flow chart of an equivalent simulation method of umbilical cable power transmission characteristics provided for the embodiments of the application;

[0018] Figure 2 A schematic diagram of an equivalent simulation circuit structure of umbilical cable power transmission characteristics provided for the embodiments of the application;

[0019] Figure 3 A working state diagram of umbilical cable power transmission provided for the embodiments of the application;

[0020] Figure 4 A circuit diagram of an equivalent simulation of umbilical cable power transmission characteristics provided for the embodiments of the application;

[0021] Figure 5 A comparison diagram of equivalent simulation of umbilical cable power transmission attenuation provided for the embodiments of the application. DETAILED DESCRIPTION

[0022] To make the objects, technical solutions and advantages of the application clearer, the technical solutions of the application will be described below in detail with the embodiments of the application and the corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the application.

[0023] The embodiments of the application provide an equivalent simulation method, circuit and medium of umbilical cable power transmission characteristics. By loss calculation corresponding to reflection coefficient and standing wave ratio, combining with dielectric loss and conductor loss, a long-distance umbilical cable power attenuation mathematical model and equivalent circuit are constructed, the technical problem of insufficient simulation precision of long-distance umbilical cable power signal transmission characteristics in the prior art is solved, and the long-distance umbilical cable equivalent circuit is realized on the physical layer to accurately predict the power attenuation and high-frequency signal attenuation process of the umbilical cable, and the prediction precision of the power attenuation and signal interference of the umbilical cable is improved.

[0024] The technical solutions of the embodiments of the application will be described in detail below with the drawings.

[0025] Figure 1 A flow chart of an equivalent simulation method of umbilical cable power transmission characteristics provided for the embodiments of the application. As Figure 1As shown, the equivalent simulation method for umbilical cable power transmission characteristics provided by the embodiment of the present application specifically includes the following steps:

[0026] In step 101, the cable parameters corresponding to the unit length umbilical cable are obtained, and based on the cable parameters, the effective circuit parameters are determined through skin effect analysis.

[0027] For example, as the signal frequency increases, the current will flow in the surface area of the conductor instead of being uniformly distributed throughout the cross section, which is called skin effect. The skin effect changes the current distribution, thereby changing the effective current path of the conductor, and the change in the current path will inevitably cause the change in inductance, so the skin effect will inevitably cause the change in conductor inductance. The present application determines the effective circuit parameters through skin effect analysis, realizes the accurate calculation of the effective resistance and effective inductance of the cable, and improves the analysis accuracy of the umbilical cable power attenuation.

[0028] Specifically, based on the cable parameters, the effective circuit parameters are determined through skin effect analysis, including: configuring the transmission requirements of the cable parameters to obtain the cable cutoff frequency; based on the cable cutoff frequency and the resistance of the unit length cable, the effective resistance parameters corresponding to the unit length umbilical cable are calculated; according to the cable cutoff frequency, the skin effect intensity control is performed to determine the cable reference frequency; wherein the cable reference frequency is used to control the skin effect intensity to adapt to the transmission characteristics of umbilical cables of different lengths; based on the cable reference frequency, the effective inductance parameters corresponding to the unit length umbilical cable are calculated; and according to the effective resistance parameters and the effective inductance parameters, the effective circuit parameters are determined.

[0029] In one embodiment, in the process of high-frequency signal transmission, not only there are dielectric loss and conductor loss, but also there are other forms of attenuation. As the signal frequency increases, the current will flow in the surface area of the conductor instead of being uniformly distributed throughout the cross section, which is called skin effect.

[0030] The skin effect changes the current distribution, thereby changing the effective current path of the conductor, and the change in the current path will inevitably cause the change in inductance, so the skin effect will inevitably cause the change in conductor inductance. Since the current is concentrated in the surface of the conductor, the effective cross-sectional area through which the current flows is reduced, which will cause the equivalent resistance of the conductor to increase with the increase of frequency, and further cause greater high-frequency signal attenuation.

[0031] Effective inductance at different frequencies and effective resistance The above is explained by the following formula.

[0032] (1)

[0033] (2)

[0034] wherein, is the resistance per unit length, is the inductance per unit length;

[0035] is the reference frequency, the influence strength of the skin effect can be controlled by adjusting the size of , so as to adapt to the transmission characteristics of umbilical cables of different lengths;

[0036] is the cutoff frequency of the cable, which is related to the skin depth.

[0037] Step 102, performing a transfer update analysis on the effective circuit parameters to obtain a characteristic impedance coefficient.

[0038] Exemplarily, due to the influence of the skin effect, the effective inductance and the effective resistance at different frequencies will change, in order to cope with the dynamically changing effective parameters, the present application realizes the dynamic updating of the propagation constant and the characteristic impedance through the transfer update analysis, and provides a data basis for the modeling of loss calculation.

[0039] Specifically, the transfer update analysis is performed on the effective circuit parameters to obtain a characteristic impedance coefficient, including: obtaining an attenuation constant and a phase constant, and based on the attenuation constant, the phase constant and the effective circuit parameters, a propagation constant update data is obtained through effective signal propagation dynamic analysis; the attenuation constant and the phase constant are updated according to the propagation constant update data; and based on the updated attenuation constant and the phase constant, a characteristic impedance coefficient is obtained.

[0040] In one embodiment, due to the influence of the skin effect, the effective inductance and the effective resistance at different frequencies will change, therefore, and are used to update the propagation constant and the characteristic impedance , and the values after updating are respectively explained by the following formulas.

[0041] (3)

[0042] (4)

[0043] wherein, is the attenuation constant, is the phase constant, and are the initial capacitance and the initial conductance.

[0044] Step 103, performing a cable loss calculation on the cable parameters to determine a cable characteristic loss.

[0045] Specifically, the cable loss calculation is performed on the cable parameters to determine the cable characteristic loss, including: performing cable medium loss analysis on the cable parameters to determine the medium loss factor; performing cable transmission resistance analysis on the cable parameters to determine the conductor loss factor; and determining the cable characteristic loss according to the medium loss factor and the conductor loss factor.

[0046] In one embodiment, when the long-distance umbilical cable transmits high-frequency signals, as the signal frequency increases and the wavelength shortens, the impedance of the capacitor decreases significantly, at which time the capacitor exhibits the characteristics of a low-pass filter, filters out part of the high-frequency signals, and the higher the signal frequency, the smaller the impedance of the capacitor, and the more significant the impact on the high-frequency signals.

[0047] In high-frequency circuits, the capacitor will produce a significant phase shift on the high-frequency signals, which is caused by the phase difference between the capacitor current and the voltage across it, and will cause the attenuation and delay of the high-frequency signals. As the signal frequency continues to rise, the impedance of the capacitor continues to decrease, and the phase shift amplitude increases, which will cause more and more signal energy to be converted into heat loss.

[0048] The insulation layer of the cable will produce dielectric loss under high-frequency signals, that is, the power loss caused by the electric field in the insulating medium, and as the signal frequency increases, the dielectric loss in the insulating material will continue to increase, causing the high-frequency signals to further attenuate.

[0049] For the medium loss factor, the following formula is used for explanation.

[0050] (5)

[0051] Wherein, is the medium loss constant, is the relative permittivity, is the medium loss angle, is the signal frequency.

[0052] For the conductor loss factor, the following formula is used for explanation.

[0053] (6)

[0054] Wherein, is the magnetic permeability of the conductor, is the electrical conductivity of the conductor.

[0055] Step 104, according to the characteristic impedance coefficient and the cable characteristic loss, the standing wave ratio parameter is obtained by analyzing the attenuation trend of long-distance transmission.

[0056] Exemplary, because the long distance umbilical cable is a non-uniform unbalanced transmission line, and in the mathematical modeling of the long distance umbilical cable, the application adopts a segmented modeling manner, and the attenuation trend analysis of long distance transmission is used to calculate the standing wave ratio by the reflection coefficient, which represents the attenuation of high frequency signals.

[0057] Specifically, according to the characteristic impedance coefficient and the cable characteristic loss, the standing wave ratio parameter is obtained by analyzing the attenuation trend of long distance transmission, including: performing cable continuation calculation on the characteristic impedance coefficient to obtain a characteristic impedance coefficient set of a continuous segment; based on the characteristic impedance coefficient set, calculating the reflection coefficient corresponding to the continuous segment; according to the reflection coefficient, determining the standing wave ratio parameter by standing wave ratio calculation.

[0058] In one embodiment, because the long distance umbilical cable is a non-uniform unbalanced transmission line, and in the mathematical modeling of the long distance umbilical cable, the application adopts a segmented modeling manner, so that each small segment has local uniformity, but the whole shows non-uniform transmission line.

[0059] Further, the impedance mismatch phenomenon between each segment due to unbalance will produce reflection and standing wave, thereby affecting the change trend of attenuation, and the reflection coefficient The above formula is explained as follows.

[0060] (7)

[0061] Wherein, is the characteristic impedance of the next segment, is the impedance of the current segment.

[0062] According to the reflection coefficient, the standing wave ratio of the cable can be obtained , and the standing wave ratio will affect the attenuation of high frequency signals, and the calculation is explained by the following formula.

[0063] (8)

[0064] Step 105, performing high frequency signal attenuation calculation on the cable characteristic loss and the standing wave ratio parameter to determine the umbilical cable transmission attenuation data.

[0065] Specifically, the high frequency signal attenuation calculation is performed on the cable characteristic loss and the standing wave ratio parameter to determine the umbilical cable transmission attenuation data, including: obtaining the length of the umbilical cable, and based on the cable characteristic loss and the length of the umbilical cable, calculating the total cable characteristic loss; performing integral calculation on the standing wave ratio parameter with respect to the length of the umbilical cable to determine the standing wave loss; according to the total cable characteristic loss and the standing wave loss, determining the umbilical cable transmission attenuation data.

[0066] In one embodiment, the total attenuation of high frequency signals in long distance umbilical cable is obtained by aggregating conductor losses, dielectric losses, and attenuation due to skin effect and impedance mismatch phenomena The calculation is explained by the following formula.

[0067] (9)

[0068] wherein, L is the length of the cable, and 8.686 is a constant for converting from natural logarithm to decibel. Since long distance umbilical cable is modeled in segments, the attenuation of high frequency signals due to skin effect and impedance mismatch phenomena is solved by integral form.

[0069] Further, after the cable characteristic loss and standing wave ratio parameters are calculated for high frequency signal attenuation to determine umbilical cable transmission attenuation data, the method further comprises: determining the remote device voltage based on the umbilical cable transmission attenuation data through the umbilical cable total pressure drop calculation; performing voltage operating range verification on the remote device voltage to obtain transmission requirement parameters; and determining transmission configuration data through umbilical cable transmission optimization according to the transmission requirement parameters.

[0070] Further, after the transmission configuration data is determined through umbilical cable transmission optimization according to the transmission requirement parameters, the method further comprises: determining signal transmission configuration parameters through transmission signal bandwidth optimization based on the transmission configuration data; and obtaining signal transmission optimization configuration parameters through dispersion timing budget according to the signal transmission configuration parameters.

[0071] The above is the method embodiment of the present application. Based on the same inventive concept, the present application embodiment also provides an equivalent analog circuit of umbilical cable power transmission characteristics, the structure of which is shown in Figure 2 .

[0072] Figure 2 An equivalent analog circuit structure diagram of umbilical cable power transmission characteristics provided by the present application embodiment. As shown in Figure 2 , the circuit comprises: a capacitor and a conductance in parallel; wherein the capacitor and the conductance are in parallel in front of a resistor; the resistor is symmetrically arranged in two equal parts on both sides of the circuit; wherein the rear of the resistor is provided with an inductor, and the inductor is also symmetrically arranged in two equal parts on both sides of the circuit; the capacitor and the conductance are connected to a power carrier transmission circuit at the end; and the inductor is connected to a power carrier transmission and reception circuit at the end.

[0073] In one embodiment, the prior art has a local gain phenomenon in simulating the high-frequency signal attenuation of the long-distance umbilical cable, which is inconsistent with the actual working condition. This is because the prior art ignores the influence of the conductance in establishing the equivalent circuit model, and does not consider the distribution position of the capacitance. The inductance of the equivalent circuit model is installed before the capacitance, forming an LC resonant frequency selective amplifier. When the frequency of the input signal is close to the resonant frequency of the circuit, the capacitance and the inductance together form a high-impedance resonant loop, and at this time the input signal is enhanced. Because near the resonant frequency, the impedance of the resonant circuit is large, the input signal is amplified through the resonant circuit. The frequency response of the LC resonant amplifier is narrow, only the signal near the resonant frequency will be significantly amplified, and the signals of other frequencies will be greatly attenuated.

[0074] Based on the above mathematical model of high-frequency signal attenuation of the long-distance umbilical cable, the present application also constructs an equivalent circuit model of the long-distance umbilical cable for simulating the voltage attenuation and high-frequency signal attenuation of the long-distance umbilical cable. The umbilical cable is composed of a complete power supply loop, and the traditional equivalent circuit model focuses more on the characteristic impedance of the circuit in the uplink stage of the power transmission line, which will lead to uneven distribution of the entire loop parameters. The equivalent circuit model of the long-distance umbilical cable is constructed by improving the traditional power transmission line based on the idea of symmetric design, and considering the distribution position of the capacitance and the inductance. The equivalent circuit divides the resistance and the inductance into two equal parts and arranges them in the uplink and downlink stages of the circuit respectively. The inductance is arranged behind the resistance in a symmetrical manner, and the inductance and the conductance are connected in parallel before the resistance. This arrangement can effectively avoid the formation of an LC resonant frequency selective amplifier in the equivalent circuit, and can avoid the occurrence of signal gain phenomenon.

[0075] S201 is the water part, S202 is the umbilical cable transmission line, and S203 is the underwater part.

[0076] Figure 3 A working state diagram of the umbilical cable power transmission provided by the embodiment of the present application is shown in Figure 3 S301 is the power carrier transmitting circuit, S302 is the long-distance umbilical cable equivalent circuit, and S303 is the power carrier receiving circuit.

[0077] Figure 4 An equivalent simulation circuit diagram of the umbilical cable power transmission characteristics provided by the embodiment of the present application is shown in Figure 4As shown, R1, R2 are resistances in the umbilical cable equivalent circuit, R3 is a load resistance, R4 is a terminal resistance of the power carrier receiving circuit, L1, L2 are inductances in the umbilical cable equivalent circuit, L3, L4, L5, L6, L7, L8 are inductances in the power carrier receiving and transmitting circuit, C1 is a capacitance in the umbilical cable equivalent circuit, C2, C3, C4, C5, C6, C7 are capacitances in the power carrier transmitting and receiving circuit, G1 is a conductance in the umbilical cable equivalent circuit, D1, D2, D3, D4, D5, D6 are diodes in the power carrier transmitting and receiving circuit, A1 is a signal generator, A2 is a baud tester, A3 is a 220V AC power supply, B1, B2, B3 are transformers.

[0078] Figure 5 An umbilical cable power transmission attenuation equivalent simulation comparison diagram provided by the embodiment of the present application is shown as follows, Figure 5 As shown, the comparison of the numerical calculation model and the equivalent circuit model of the umbilical cable with the actual umbilical cable attenuation value in terms of high-frequency signal attenuation is analyzed. The length of the umbilical cable is selected as 15km, and the signal attenuation under this distance is analyzed, and the high-frequency signal frequency is increased from 0.5kHz to 100kHz. It can be seen that the numerical calculation model and the equivalent circuit model of the present application are highly consistent with the attenuation value of the actual umbilical cable in terms of error and change trend.

[0079] The non-volatile computer storage medium corresponding to the method provided by some embodiments of the present application is shown as follows, Figure 1 The computer executable instructions are set as follows:

[0080] The cable parameters corresponding to the unit length umbilical cable are obtained, and based on the cable parameters, the effective circuit parameters are determined through the skin effect analysis; the effective circuit parameters are analyzed by transfer updating to obtain the characteristic impedance coefficient; the cable loss calculation is performed on the cable parameters to determine the cable characteristic loss; according to the characteristic impedance coefficient and the cable characteristic loss, the standing wave ratio parameter is obtained through the attenuation trend analysis of long distance transmission; the high-frequency signal attenuation calculation is performed on the cable characteristic loss and the standing wave ratio parameter to determine the umbilical cable transmission attenuation data.

[0081] Each embodiment in the present application is described in a progressive manner, and the same and similar parts between each embodiment can be referred to each other. Each embodiment mainly explains the difference from other embodiments. Especially, the IoT device and medium embodiments are basically similar to the method embodiments, so the description is relatively simple, and the related parts can be referred to the part of the method embodiment.

[0082] The system and medium provided by the embodiments of the present application are one-to-one corresponding, and therefore, the system and medium also have similar beneficial technical effects to the corresponding method. Since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the system and medium will not be described here again.

Claims

1. An equivalent simulation method for the power transmission characteristics of an umbilical cable, characterized in that, The method includes: Obtain the cable parameters corresponding to a unit length of umbilical cable, and determine the effective circuit parameters based on the cable parameters through skin effect analysis; The effective circuit parameters are subjected to a transfer update analysis to obtain the characteristic impedance coefficient; The cable parameters are used to calculate cable loss in order to determine the characteristic loss of the cable. Based on the characteristic impedance coefficient and the characteristic loss of the cable, the standing wave ratio parameter is obtained through attenuation trend analysis over long distance transmission; High-frequency signal attenuation is calculated based on the cable characteristic loss and VSWR parameters to determine the umbilical cable transmission attenuation data. To determine the umbilical cable transmission attenuation data, high-frequency signal attenuation is calculated based on the cable's characteristic loss and VSWR parameters. Specifically, this includes: obtaining the umbilical cable length and calculating the total characteristic loss of the cable based on the cable's characteristic loss and length; performing an integral calculation of the VSWR parameter over the umbilical cable length to determine the VSWR loss; and determining the umbilical cable transmission attenuation data based on the total characteristic loss and VSWR loss. The total attenuation of high-frequency signals in long-distance umbilical cables is thus determined. The calculation formula is: in, It is the length of the cable, and 8.686 is a constant converted from the natural logarithm to decibels. Let be the magnetic permeability of the conductor. Let be the electrical conductivity of the conductor. Let be the dielectric loss constant. For relative permittivity, For dielectric loss angle, The signal frequency; Based on the cable parameters, effective circuit parameters are determined through skin effect analysis, specifically including: Configure the cable parameters according to transmission requirements to obtain the cable cutoff frequency; Based on the cable cutoff frequency and the resistance per unit length of cable, the effective resistance parameter corresponding to the unit length of umbilical cable is calculated; wherein, the formula for calculating the effective resistance parameter corresponding to the unit length of umbilical cable is: in, Resistance per unit length This is the cutoff frequency of the cable, which is related to the skin depth. Based on the cable cutoff frequency, the cable reference frequency is determined by controlling the skin effect intensity; wherein, the cable reference frequency is used to control the skin effect intensity to adapt to the transmission characteristics of umbilical cables of different lengths. Based on the cable reference frequency, the effective inductance parameter corresponding to the unit length of the umbilical cable is calculated; wherein, the formula for calculating the effective inductance parameter corresponding to the unit length of the umbilical cable is: in, Inductance per unit length; As the reference frequency, it can be adjusted The size of the umbilical cable is used to control the intensity of the skin effect, thereby adapting to the transmission characteristics of umbilical cables of different lengths; The effective circuit parameters are determined based on the effective resistance parameters and the effective inductance parameters.

2. The equivalent simulation method for the power transmission characteristics of an umbilical cable according to claim 1, characterized in that, The effective circuit parameters are subjected to a transfer update analysis to obtain the characteristic impedance coefficient, specifically including: The attenuation constant and phase constant are obtained, and based on the attenuation constant, phase constant and effective circuit parameters, the propagation constant update data is obtained through dynamic analysis of effective signal propagation; Update the attenuation constant and the phase constant based on the propagation constant update data; The characteristic impedance coefficient is obtained based on the updated attenuation constant and phase constant.

3. The equivalent simulation method for the power transmission characteristics of an umbilical cable according to claim 1, characterized in that, The cable parameters are used to calculate cable loss in order to determine the characteristic loss of the cable, specifically including: Perform cable dielectric loss analysis on the cable parameters to determine the dielectric loss factor; The cable parameters are analyzed for transmission resistance to determine the conductor loss factor. The characteristic loss of the cable is determined based on the dielectric loss factor and the conductor loss factor.

4. The equivalent simulation method for the power transmission characteristics of an umbilical cable according to claim 1, characterized in that, Based on the characteristic impedance coefficient and the cable characteristic loss, the standing wave ratio (SWR) parameter is obtained through attenuation trend analysis over long distance transmission, specifically including: The characteristic impedance coefficients are used to calculate the cable continuity to obtain a set of characteristic impedance coefficients for continuous segments; Based on the set of characteristic impedance coefficients, calculate the reflection coefficient corresponding to the continuous segment; Based on the reflection coefficient, the standing wave ratio parameter is determined by calculation.

5. The equivalent simulation method for the power transmission characteristics of an umbilical cable according to claim 1, characterized in that, After calculating high-frequency signal attenuation based on cable characteristic loss and VSWR parameters to determine umbilical cable transmission attenuation data, the method further includes: Based on the umbilical cable transmission attenuation data, the voltage of the remote device is determined by calculating the total voltage drop of the umbilical cable. The voltage operating range of the remote device is verified to obtain the transmission requirement parameters; Based on the transmission requirement parameters, transmission configuration data is determined through umbilical cable transmission optimization.

6. The equivalent simulation method for the power transmission characteristics of an umbilical cable according to claim 5, characterized in that, After determining the transmission configuration data based on the transmission requirement parameters and through umbilical cable transmission optimization, the method further includes: Based on the transmission configuration data, the signal transmission configuration parameters are determined by optimizing the transmission signal bandwidth. Based on the signal transmission configuration parameters, the optimized signal transmission configuration parameters are obtained through dispersion timing budgeting.

7. A non-volatile computer storage medium that provides an equivalent simulation of the power transmission characteristics of an umbilical cable, storing computer-executable instructions, characterized in that... The computer-executable instructions are set as follows: Obtain the cable parameters corresponding to a unit length of umbilical cable, and determine the effective circuit parameters based on the cable parameters through skin effect analysis; The effective circuit parameters are subjected to a transfer update analysis to obtain the characteristic impedance coefficient; The cable parameters are used to calculate cable loss in order to determine the characteristic loss of the cable. Based on the characteristic impedance coefficient and the characteristic loss of the cable, the standing wave ratio parameter is obtained through attenuation trend analysis over long distance transmission; High-frequency signal attenuation is calculated based on the cable characteristic loss and VSWR parameters to determine the umbilical cable transmission attenuation data. To determine the umbilical cable transmission attenuation data, high-frequency signal attenuation is calculated based on the cable's characteristic loss and VSWR parameters. Specifically, this includes: obtaining the umbilical cable length and calculating the total characteristic loss of the cable based on the cable's characteristic loss and length; performing an integral calculation of the VSWR parameter over the umbilical cable length to determine the VSWR loss; and determining the umbilical cable transmission attenuation data based on the total characteristic loss and VSWR loss. The total attenuation of high-frequency signals in long-distance umbilical cables is thus determined. The calculation formula is: in, It is the length of the cable, and 8.686 is a constant converted from the natural logarithm to decibels. Let be the magnetic permeability of the conductor. Let be the electrical conductivity of the conductor. Let be the dielectric loss constant. For relative permittivity, For dielectric loss angle, The signal frequency; Based on the cable parameters, effective circuit parameters are determined through skin effect analysis, specifically including: Configure the cable parameters according to transmission requirements to obtain the cable cutoff frequency; Based on the cable cutoff frequency and the resistance per unit length of cable, the effective resistance parameter corresponding to the unit length of umbilical cable is calculated; wherein, the formula for calculating the effective resistance parameter corresponding to the unit length of umbilical cable is: in, Resistance per unit length This is the cutoff frequency of the cable, which is related to the skin depth. Based on the cable cutoff frequency, the cable reference frequency is determined by controlling the skin effect intensity; wherein, the cable reference frequency is used to control the skin effect intensity to adapt to the transmission characteristics of umbilical cables of different lengths. Based on the cable reference frequency, the effective inductance parameter corresponding to the unit length of the umbilical cable is calculated; wherein, the formula for calculating the effective inductance parameter corresponding to the unit length of the umbilical cable is: in, Inductance per unit length; As the reference frequency, it can be adjusted The size of the umbilical cable is used to control the intensity of the skin effect, thereby adapting to the transmission characteristics of umbilical cables of different lengths; The effective circuit parameters are determined based on the effective resistance parameters and the effective inductance parameters.

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