CN112751429B - Memory, electromagnetic wave control method, device and equipment for pipeline power transmission - Google Patents
Memory, electromagnetic wave control method, device and equipment for pipeline power transmission Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
Abstract
The invention discloses a memory, and an electromagnetic wave control method, device and equipment for pipeline power transmission, wherein the method comprises the following steps: generating an electromagnetic wave frequency value of a high-frequency generator for pipeline power transmission according to a preset algorithm; generating breakdown electric field strength and dielectric constant of the conveying medium under different pressures according to the property data of the conveying medium; calculating the maximum electric field intensity in the conveying pipeline according to the structural data of the conveying pipeline and the property of the transmission medium; calculating the maximum transmission energy density which can be born by the conveying pipeline according to the maximum electric field intensity; calculating the output power of the high-frequency generator according to the maximum transmission energy density; the invention can improve the transmission efficiency and the safety when the power transmission is carried out through the transmission pipeline.
Description
Technical Field
The invention relates to the field of electric power, in particular to a memory, and a method, a device and equipment for controlling electromagnetic waves for pipeline power transmission.
Background
In the traditional mode, long-distance transmission of electric energy generally needs to independently construct a transmission line, and three-phase alternating current transmission or positive and negative direct current transmission is adopted.
In recent years, the pipeline power transmission, GIL gas insulated pipeline or oil gas transmission pipeline is realized by adding a conductive wire in the pipeline, and power frequency alternating current or direct current is utilized for power transmission, wherein the pipeline power transmission comprises the superconducting power transmission scientific research project of LNG pipeline, namely the superconducting direct current power transmission/gas transmission integrated energy pipeline, and the common transmission of power and LNG is realized.
In the above-mentioned prior art power transmission/gas transmission integrated energy pipeline (abbreviated as superconducting energy pipeline) or gas insulation pipeline technology, power transmission or power transmission/gas transmission integration is realized by erecting power transmission equipment composed of insulating supporting frameworks, superconducting/energizing conductors and other components in the pipeline.
The inventor finds that the technical scheme of using a pipeline for power transmission in the prior art has at least the following defects:
the conductive part arranged in the pipeline needs to be made of conductive materials with very low resistivity, the LNG shares the high-temperature superconducting materials needed by pipeline power transmission, the high-temperature superconducting materials are difficult to form into a line at present, the cost is very high, and in addition, the insulating support framework arranged in the LNG pipeline needs to be made of materials resistant to the low temperature of the LNG, so the cost is also high.
That is, the cost of manufacturing the conductive portion and the insulating support frame suitable for the superconducting energy pipe is high, which results in the overall cost of the power transmission system in the prior art being too high.
In addition, the high-voltage wire is directly added in the pipeline to transmit power, and the common pipeline to the ground potential can be influenced, and particularly in the case of a ground short circuit, the pipeline to the ground heavy current can influence and even destroy pipeline potential monitoring and anti-corrosion measures.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The purpose of the present invention is to improve the transmission efficiency and safety when power is transmitted through a transmission pipe.
The invention provides an electromagnetic wave control method for pipeline power transmission, which comprises the following steps:
s11, acquiring cut-off wavelength of electromagnetic waves in a conveying pipeline according to a preset formula by taking pipe diameter data of the conveying pipeline as parameters, and generating electromagnetic wave frequency values of a high-frequency generator for pipeline power transmission according to a preset algorithm by taking the cut-off wavelength as a parameter;
s12, generating breakdown electric field strength and dielectric constant of the conveying medium under different pressures according to the property data of the conveying medium;
s13, calculating the maximum electric field intensity in the conveying pipeline according to the structural data of the conveying pipeline and the property of the transmission medium; the maximum electric field strength is less than the breakdown electric field strength of the transmission medium;
s14, calculating the maximum transmission energy density which can be born by the conveying pipeline according to the maximum electric field intensity;
s15, calculating the output power of the high-frequency generator according to the maximum transmission energy density.
In the invention, the conveying pipeline is a shared pipeline for oil gas conveying and electromagnetic wave conveying.
In the present invention, the transmission medium of the transmission pipeline comprises natural gas.
In the invention, the cut-off wavelength of electromagnetic waves in a conveying pipeline is obtained according to a preset formula by taking pipe diameter data of the conveying pipeline as parameters, and an electromagnetic wave frequency value of a high-frequency generator for pipeline power transmission is generated according to a preset algorithm by taking the cut-off wavelength as parameters, and the method comprises the following steps:
the calculation formula of the cutoff wavelength λc may include a circular waveguide calculation formula including:
in the formula, R is the radius of the conveying pipeline; λc is the cut-off wavelength of electromagnetic waves; v (v) mn Sum mu mn Respectively m-order BeThe nth non-zero root of the ssel function and its first derivative; λc TEmn The cut-off wavelength of TE wave; λc TMmn A cut-off wavelength of TM wave;
after obtaining the cut-off wavelength λc, then determining the electromagnetic wave frequency λ of the transmission pipeline adaptation, including:
the electromagnetic wave frequency lambda adapted to the conveying pipeline is smaller than the cut-off wavelength lambda c, and is determined by the radius R of the conveying pipeline and the corresponding electromagnetic wave modulus, and comprises the following steps:
when electromagnetic wave TE11 main mode transmission is adopted, λc=3.41R, and 2.61R is not less than λ and not more than 3.41R, only the main mode exists;
when electromagnetic wave TTM01 mode transmission is adopted, λc=2.61R;
when electromagnetic wave TE01 mode transmission is adopted, λc=1.61R;
based on the cut-off wavelength and the transmission medium properties calculated above, the frequency of the high-frequency generator, in particular a microwave magnetron, is finally determined, namely:
relationship between frequency and wavelength:
wave velocity:
frequency:
where f is the frequency of the high frequency generator, v is the velocity of electromagnetic waves in the transmission medium in the pipeline, ε is the permittivity in the transmission medium in the pipeline, and μ is the permeability in the pipeline medium.
In the present invention, the maximum electric field strength is smaller than a breakdown electric field strength of the transmission medium, including:
the maximum electric field strength is lower than the breakdown electric field strength of the transmission medium, and a preset margin is reserved.
In the present invention, the formula for calculating the maximum electric field intensity in the conveying pipe includes:
E max ≤kE b ，k≤1；
wherein E is max Is the maximum electric field strength; e (E) b The breakdown field strength for the transmission medium; k is a coefficient.
In the present invention, the formula for calculating the maximum transmission energy density that the transmission pipeline can withstand according to the maximum electric field intensity includes:
wherein w is e Is the maximum transmission energy density; epsilon is the dielectric constant of the medium; e (E) max Is the maximum electric field strength.
In the present invention, a formula for calculating the output power of the high frequency generator according to the maximum transmission energy density includes:
P＝∫∫ s w e ；
wherein w is e Is the maximum transmission energy density; p is the transmission power.
In another aspect of the embodiment of the present invention, there is also provided an electromagnetic wave control device for pipe power transmission, including:
the frequency calculation unit is used for acquiring the cut-off wavelength of electromagnetic waves in the conveying pipeline according to a preset formula by taking the pipe diameter data of the conveying pipeline as parameters, and generating an electromagnetic wave frequency value of a high-frequency generator for pipeline power transmission according to a preset algorithm by taking the cut-off wavelength as a parameter;
an electrical property acquisition unit for generating breakdown electric field strength and dielectric constant of the conveying medium under different pressures according to property data of the conveying medium;
the field intensity calculation unit is used for calculating the maximum electric field intensity in the common pipeline according to the structural data of the conveying pipeline and the property of the transmission medium; the maximum electric field strength is less than the breakdown electric field strength of the transmission medium;
the energy density calculation unit is used for calculating the maximum transmission energy density which can be born by the conveying pipeline according to the maximum electric field intensity;
and the power calculation unit is used for calculating the output power of the high-frequency generator according to the maximum transmission energy density.
In another aspect of the embodiments of the present invention, there is also provided a memory, including a software program adapted to be executed by a processor to perform the steps of the above electromagnetic wave control method for pipe power transmission.
In another aspect of the embodiments of the present invention, there is also provided an electromagnetic wave control apparatus for pipe power transmission, including a computer program stored on a memory, the computer program including program instructions which, when executed by a computer, cause the computer to perform the method described in the above aspects and achieve the same technical effects.
Compared with the prior art, the invention has the following beneficial effects:
the typical application scene of the invention is as follows: when power transmission is performed through a transmission pipe (i.e., pipe power transmission), current is converted into electromagnetic wave energy through a high-frequency transmitter and an electromagnetic waveguide at a power transmission end of the transmission pipe, electromagnetic waves are transmitted along the transmission pipe to a receiving end by using an inner wall of the transmission pipe, and then the electromagnetic wave energy is converted into electric energy through a high-frequency receiver and the electromagnetic waveguide at the receiving end, thereby realizing power transmission. According to the technical scheme, the transmission of electromagnetic waves and the limitation of electromagnetic field energy are realized without using a metal conductor circuit and a corresponding insulating device in a conveying pipeline; therefore, the structure of the whole power transmission system can be simplified, and the overall cost of the power transmission system is reduced.
In order to improve the transmission efficiency and the safety of the power transmission system in the technical scheme, in the embodiment of the invention, the characteristics of electromagnetic waves generated by the high-frequency transmitter during the transmission of the pipeline are correspondingly controlled, and on one hand, the electromagnetic wave frequency suitable for the current transmission pipeline is determined according to the pipe diameter of the transmission pipeline; on the other hand, the maximum electric field intensity in the conveying pipeline is calculated according to the property data of the conveying medium and the structure data of the conveying pipeline; thereby obtaining the maximum transmission energy density which can be born by the transmission pipeline; then calculating the corresponding output power of the high-frequency generator according to the maximum transmission energy density; through the calculation, the frequency and the power which are matched with the transmission pipeline when the high-frequency transmitter generates the electromagnetic wave can be determined, so that the transmission efficiency and the safety of the power transmission system are effectively improved.
The foregoing description is only an overview of the present invention, and it is to be understood that it is intended to provide a more clear understanding of the technical means of the present invention and to enable the technical means to be carried out in accordance with the contents of the specification, while at the same time providing a more complete understanding of the above and other objects, features and advantages of the present invention, and one or more preferred embodiments thereof are set forth below, together with the detailed description given below, along with the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a power transmission system for pipeline power transmission according to the present invention;
fig. 2 is a step diagram of an electromagnetic wave control method for pipe power transmission according to the present invention;
fig. 3 is a schematic structural view of an electromagnetic wave control device for pipe power transmission according to the present invention;
fig. 4 is a schematic structural view of an electromagnetic wave control apparatus for pipe power transmission according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or other components.
Spatially relative terms, such as "below," "beneath," "lower," "above," "upper," and the like, may be used herein for ease of description to describe one element's or feature's relationship to another element's or feature's in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the article in use or operation in addition to the orientation depicted in the figures. For example, if the article in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" may encompass both a direction of below and a direction of above. The article may have other orientations (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terms "first," "second," and the like herein are used for distinguishing between two different elements or regions and are not intended to limit a particular position or relative relationship. In other words, in some embodiments, the terms "first," "second," etc. may also be interchanged with one another.
Firstly, it should be noted that, the application scenario of the embodiment of the present invention is a transmission system of a pipeline transmission mode, specifically, the transmission system directly adopts a transmission pipeline to realize transmission of electromagnetic waves and limit electromagnetic field energy, without using good conductor metal or superconducting materials in the transmission pipeline, directly adopts pipeline space or transmission materials as electromagnetic field channels, and does not need additional insulating material devices. The material of the transmission pipeline is metal, or the inner wall of the transmission pipeline comprises a coating layer made of good conductor or superconductor, so as to be used for transmitting electromagnetic waves.
Since the transmission system transmits electromagnetic waves through the transmission pipe without physical substance transmission inside the transmission pipe, the transmission pipe may be provided as a common pipe, for example, a common pipe that can transmit electromagnetic waves and oil gas, or a common pipe of an electromagnetic wave transmission and gas-insulated transmission line GIL.
The typical structure of the power transmission system may be as shown in fig. 1, and the typical structure includes a high-frequency generator 02 disposed at a power transmission end of the transmission pipeline 01 to convert a current of a power transmission end grid 03 into electromagnetic wave energy with a preset frequency; a first electromagnetic waveguide 04 connected to the high-frequency generator 02 is used to guide the electromagnetic wave energy into the delivery pipe 01 via a transmitting antenna; a second electromagnetic waveguide 06 is connected to the high-frequency receiver 05 provided at the receiving end of the transmission pipe 01, and the second electromagnetic waveguide 06 is configured to convert electromagnetic wave energy received from the transmission pipe 01 into electric energy through a receiving antenna.
Based on the above application scenario, in order to improve the transmission efficiency and the safety when the power is transmitted through the transmission pipeline, as shown in fig. 2, an embodiment of the present invention provides an electromagnetic wave control method for pipeline power transmission, including the steps of:
s11, acquiring cut-off wavelength of electromagnetic waves in a conveying pipeline according to a preset formula by taking pipe diameter data of the conveying pipeline as parameters, and generating electromagnetic wave frequency values of a high-frequency generator for pipeline power transmission according to a preset algorithm by taking the cut-off wavelength as a parameter;
in embodiments of the present invention, the common conduit (i.e., multiplexed delivery conduit) may be a natural gas delivery conduit; in order to be suitable for electromagnetic wave conduction, the material of the common pipeline in the embodiment of the invention should be a metal material (such as copper, aluminum or steel) with good conductor, or a coating or cladding with good conductor or superconductor may be arranged on the inner wall of the common pipeline, so as to improve the transmission efficiency of electromagnetic waves in the common pipeline.
The following describes an embodiment of the present invention by taking a case that the common pipeline is a natural gas pipeline, that is, the natural gas pipeline in the embodiment of the present invention may be used for transmitting not only natural gas but also electromagnetic waves.
In the embodiment of the invention, the frequency of the electromagnetic wave generated by the high-frequency generator 02 needs to be correspondingly controlled so that the electromagnetic wave energy can be efficiently transmitted in the natural gas transmission pipeline 01.
In practical application, regarding the frequency of the electromagnetic wave generated by the high-frequency generator 02, the optimal value of the electromagnetic wave can be obtained through a certain algorithm, so as to maximize the transmission efficiency of the electromagnetic wave energy in the natural gas transmission pipeline 01, and specifically:
taking the inner diameter of the natural gas conveying pipeline 01 and the property of a conveying medium as parameters, and calculating the electromagnetic wave frequency matched with the natural gas conveying pipeline 01 according to a preset algorithm; the preset algorithm in the embodiment of the invention comprises the following steps:
the calculation formula of the cutoff wavelength λc may refer to a round waveguide calculation formula including:
in the formula, R is the radius of a natural gas conveying pipeline; λc is the cut-off wavelength of electromagnetic waves; v (v) mn Sum mu mn The N-th non-zero roots of the m-order Bessel function and the first derivative thereof are respectively; λc TEmn The cut-off wavelength of TE wave; λc TMmn A cut-off wavelength of TM wave;
after the cut-off wavelength λc is obtained, the electromagnetic wave frequency λ adapted to the natural gas transport pipeline is then determined, in particular:
the electromagnetic wave frequency lambda matched with the natural gas transmission pipeline is smaller than the cut-off wavelength lambda c, and is determined by the adopted pipeline size (radius R) and the selected electromagnetic wave modulus, and the method comprises the following steps:
when electromagnetic wave TE11 main mode transmission is adopted, λc=3.41R, the advantages are that the wavelength is maximum, the frequency is lowest, and the main mode is only when λ is more than or equal to 2.61R and less than or equal to 3.41R;
when electromagnetic wave TTM01 mode transmission is adopted, λc=2.61R has the advantages of axisymmetric wave energy and no polarization degeneracy;
when electromagnetic wave TE01 mode transmission is adopted, λc=1.61R has the advantages of axisymmetric wave energy, minimum loss, suitability for long-distance transmission and high frequency.
Based on the cut-off wavelength and the transmission medium properties calculated above, the frequency of the high-frequency generator, in particular a microwave magnetron, is finally determined, namely:
relationship between frequency and wavelength:
where f is the frequency of the high frequency generator, v is the velocity of electromagnetic waves in the transmission medium in the pipeline, ε is the permittivity in the transmission medium in the pipeline, and μ is the permeability in the pipeline medium.
Next, further, in the embodiment of the present invention, the power density of the electromagnetic wave generated by the high-frequency generator 02 may be controlled, specifically, the wavelength and the power density of the electromagnetic wave may be determined according to the internal space and the medium of the natural gas transmission pipeline 01, so as to avoid the discharge phenomenon in the natural gas transmission pipeline 01, thereby ensuring the transmission efficiency and the safety of the electromagnetic wave energy.
The frequency energy density of the electromagnetic wave adapted to the natural gas transmission pipeline 01 is smaller than the electric strength principle of the transmission medium, and can be determined by electromagnetic field inside the pipeline and modeling of the electromagnetic wave, and specifically, the method can comprise the following steps:
s12, generating breakdown electric field strength and dielectric constant of the conveying medium under different pressures according to the property data of the conveying medium;
obtaining the breakdown electric field strength and dielectric constant of the transmission medium under different pressures through table lookup or calculation;
s13, calculating the maximum electric field intensity in the conveying pipeline according to the structural data of the conveying pipeline and the property of the transmission medium; the maximum electric field strength is less than the breakdown electric field strength of the transmission medium;
performing electromagnetic wave process calculation according to the structure of the natural gas conveying pipeline 01 and the performance of a transmission medium; calculating the maximum electric field intensity E in the natural gas conveying pipeline 01 max Should be lower than the breakdown field strength E of the transmission medium b And a certain margin is left, namely:
E max ≤kE b ，k≤1；
s14, calculating the maximum transmission energy density which can be born by the conveying pipeline according to the maximum electric field intensity;
calculating maximum transmission energy density w from maximum electric field intensity in natural gas transmission pipeline 01 e : the formula of (c) may include:
s15, calculating the output power of the high-frequency generator according to the maximum transmission energy density.
According to the maximum energy density w of transmission in the natural gas transmission pipeline 01 e The highest transmission power in the natural gas transmission pipeline 01 is calculated, and the formula can comprise
P＝∫∫ s w e ；
In the formula, E is the electric strength of the transmission medium, and w e P is transmission power, epsilon is dielectric constant of transmission medium; e (E) max Is the maximum electric field strength; e (E) b To break down the electric field strength.
By calculating the electromagnetic wave frequency lambda adapted to the natural gas transmission pipeline and the highest transmission power in the natural gas transmission pipeline, the transmission frequency and the transmission power of the high-frequency generator can be controlled, so that the transmission efficiency and the transmission capacity of power transmission can be improved on the basis of ensuring the safety of a power transmission system and the natural gas transmission pipeline.
In another aspect of the embodiment of the present invention, as shown in fig. 3, there is also provided an electromagnetic wave control device for pipe power transmission, including:
a frequency calculation unit 101, configured to obtain a cut-off wavelength of electromagnetic waves in a transmission pipeline according to a preset formula by using pipe diameter data of the transmission pipeline as parameters, and generate an electromagnetic wave frequency value of a high-frequency generator for pipeline power transmission according to a preset algorithm by using the cut-off wavelength as a parameter;
an electrical property obtaining unit 102, configured to generate breakdown electric field strength and dielectric constant of the conveying medium under different pressures according to property data of the conveying medium;
a field intensity calculation unit 103 for calculating a maximum electric field intensity in the common pipeline based on the structural data of the conveying pipeline and the property of the transmission medium; the maximum electric field strength is less than the breakdown electric field strength of the transmission medium;
an energy density calculating unit 104, configured to calculate a maximum transmission energy density that can be borne by the conveying pipeline according to the maximum electric field intensity;
a power calculation unit 105 for calculating the output power of the high frequency generator based on the maximum transmission energy density.
In summary, since the working principle and the beneficial effects of the electromagnetic wave control device for pipeline transmission in the embodiment of the present invention have been described and illustrated in the electromagnetic wave control method for pipeline transmission corresponding to fig. 2, reference may be made to each other, and redundant description is omitted herein.
In an embodiment of the present invention, there is also provided a memory, where the memory includes a software program adapted to execute each step in the electromagnetic wave control method for pipeline power transmission corresponding to fig. 2 by a processor.
The embodiment of the invention can be realized by a software program, namely, by compiling a software program (and an instruction set) for realizing each step in the electromagnetic wave control method for pipeline transmission corresponding to fig. 2, the software program is stored in a storage device, and the storage device is arranged in a computer device, so that a processor of the computer device can call the software program to realize the purpose of the embodiment of the invention.
In an embodiment of the present invention, there is further provided an electromagnetic wave control apparatus for pipe power transmission, where a memory included in the electromagnetic wave control apparatus for pipe power transmission includes a corresponding computer program product, and when program instructions included in the computer program product are executed by a computer, the computer can be caused to execute the electromagnetic wave control method for pipe power transmission described in the above aspects, and achieve the same technical effects.
Fig. 4 is a schematic diagram of a hardware structure of an electromagnetic wave control apparatus for pipe power transmission as an electronic apparatus according to an embodiment of the present invention, and as shown in fig. 4, the apparatus includes one or more processors 610, a bus 630, and a memory 620. Taking a processor 610 as an example, the apparatus may further comprise: input means 640, output means 650.
The processor 610, memory 620, input devices 640, and output devices 650 may be connected by a bus or other means, for example in fig. 4.
Memory 620, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and modules. The processor 610 executes various functional applications of the electronic device and data processing, i.e., implements the processing methods of the method embodiments described above, by running non-transitory software programs, instructions, and modules stored in the memory 620.
Memory 620 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data, etc. In addition, memory 620 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 620 optionally includes memory remotely located relative to processor 610, which may be connected to the processing device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 640 may receive input numeric or character information and generate signal inputs. The output 650 may include a display device such as a display screen.
The one or more modules are stored in the memory 620 and, when executed by the one or more processors 610, perform:
s11, acquiring cut-off wavelength of electromagnetic waves in a conveying pipeline according to a preset formula by taking pipe diameter data of the conveying pipeline as parameters, and generating electromagnetic wave frequency values of a high-frequency generator for pipeline power transmission according to a preset algorithm by taking the cut-off wavelength as a parameter;
s12, generating breakdown electric field strength and dielectric constant of the conveying medium under different pressures according to the property data of the conveying medium;
s13, calculating the maximum electric field intensity in the conveying pipeline according to the structural data of the conveying pipeline and the property of the transmission medium; the maximum electric field strength is less than the breakdown electric field strength of the transmission medium;
s14, calculating the maximum transmission energy density which can be born by the conveying pipeline according to the maximum electric field intensity;
s15, calculating the output power of the high-frequency generator according to the maximum transmission energy density.
The product can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. Technical details not described in detail in this embodiment may be found in the methods provided in the embodiments of the present invention.
In the several embodiments provided in the present invention, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage device, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage device includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), reRAM, MRAM, PCM, NAND Flash, NOR Flash, memristor, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the invention
In the several embodiments provided in the present invention, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage device, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage device includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), reRAM, MRAM, PCM, NAND Flash, NOR Flash, memristor, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. An electromagnetic wave control method for pipeline power transmission, characterized by comprising the steps of:
s11, acquiring cut-off wavelength of electromagnetic waves in a conveying pipeline according to a preset formula by taking pipe diameter data of the conveying pipeline as parameters, and generating electromagnetic wave frequency values of a high-frequency generator for pipeline power transmission according to a preset algorithm by taking the cut-off wavelength as parameters, wherein the method comprises the following steps:
the calculation formula of the cutoff wavelength λc includes a circular waveguide calculation formula including:
in the formula, R is the radius of the conveying pipeline; λc is the cut-off wavelength of electromagnetic waves; v (v) mn Sum mu mn Respectively an nth non-zero root of an m-order Bessel function and a first derivative thereof; λc TEmn The cut-off wavelength of TE wave;
after obtaining the cut-off wavelength λc, then determining the electromagnetic wave frequency f adapted to the conveying pipeline, comprising:
the electromagnetic wave wavelength lambda adapted to the conveying pipeline is smaller than the cut-off wavelength lambda c, and is determined by the radius R of the conveying pipeline and the corresponding electromagnetic wave modulus, and comprises the following steps:
when electromagnetic wave TE11 main mode transmission is adopted, λc=3.41R, and 2.61R is not less than λ and not more than 3.41R, only the main mode exists;
when electromagnetic wave TTM01 mode transmission is adopted, λc=2.61R;
when electromagnetic wave TE01 mode transmission is adopted, λc=1.61R;
the formula for determining the electromagnetic wave frequency f of the conveying pipe fitting comprises:
wherein lambda is the wavelength of electromagnetic waves, v is the speed of electromagnetic waves in a transmission medium in the pipeline;
s12, generating breakdown electric field strength and dielectric constant of the conveying medium under different pressures according to the property data of the conveying medium;
s13, calculating the maximum electric field intensity in the conveying pipeline according to the structural data of the conveying pipeline and the property of the transmission medium; the maximum electric field strength is less than the breakdown electric field strength of the transmission medium;
s14, calculating the maximum transmission energy density which can be born by the conveying pipeline according to the maximum electric field intensity, wherein the required formula comprises the following steps:
wherein w is e Is the maximum transmission energy density; epsilon is the dielectric constant of the transmission medium in the pipeline; e (E) max Is the maximum electric field strength;
s15, calculating the output power of the high-frequency generator according to the maximum transmission energy density.
2. The electromagnetic wave control method according to claim 1, wherein the transport pipe is a common pipe for oil gas transport and electromagnetic wave transport.
3. The electromagnetic wave control method according to claim 2, wherein the transmission medium of the transmission pipe includes natural gas.
4. The electromagnetic wave control method according to claim 1, wherein the maximum electric field strength is smaller than a breakdown electric field strength of the transmission medium, comprising:
the maximum electric field strength is lower than the breakdown electric field strength of the transmission medium, and a preset margin is reserved.
5. The electromagnetic wave control method according to claim 3, wherein the formula for calculating the maximum electric field intensity in the transport pipe includes:
E max ≤kE b ，k≤1；
wherein E is max Is the maximum electric field strength; e (E) b The breakdown field strength for the transmission medium; k is a coefficient.
6. The electromagnetic wave control method according to claim 1, wherein the formula for calculating the output power of the high-frequency generator from the maximum transmission energy density includes:
P＝∫∫ s w e ；
wherein w is e Is the maximum transmission energy density; p is the transmission power.
7. An electromagnetic wave control device for transmission of electricity in a pipeline, characterized by comprising:
the frequency calculation unit is used for acquiring the cut-off wavelength of electromagnetic waves in the conveying pipeline according to a preset formula by taking the pipe diameter data of the conveying pipeline as parameters, and generating an electromagnetic wave frequency value of a high-frequency generator for pipeline power transmission according to a preset algorithm by taking the cut-off wavelength as a parameter, and comprises the following steps:
the calculation formula of the cutoff wavelength λc includes a circular waveguide calculation formula including:
in the formula, R is the radius of the conveying pipeline; λc is the cut-off wavelength of electromagnetic waves; v (v) mn Sum mu mn Respectively an nth non-zero root of an m-order Bessel function and a first derivative thereof; λc TEmn The cut-off wavelength of TE wave;
after obtaining the cut-off wavelength λc, then determining the electromagnetic wave frequency λ of the transmission pipeline adaptation, including:
the electromagnetic wave frequency lambda adapted to the conveying pipeline is smaller than the cut-off wavelength lambda c, and is determined by the radius R of the conveying pipeline and the corresponding electromagnetic wave modulus, and comprises the following steps:
when electromagnetic wave TE11 main mode transmission is adopted, λc=3.41R, and 2.61R is not less than λ and not more than 3.41R, only the main mode exists;
when electromagnetic wave TTM01 mode transmission is adopted, λc=2.61R;
when electromagnetic wave TE01 mode transmission is adopted, λc=1.61R;
an electrical property acquisition unit for generating breakdown electric field strength and dielectric constant of the conveying medium under different pressures according to property data of the conveying medium;
the field intensity calculation unit is used for calculating the maximum electric field intensity in the common pipeline according to the structural data of the conveying pipeline and the property of the transmission medium; the maximum electric field strength is less than the breakdown electric field strength of the transmission medium;
an energy density calculating unit, configured to calculate a maximum transmission energy density that can be borne by the conveying pipeline according to the maximum electric field intensity, where a required formula includes:
wherein w is e Is the maximum transmission energy density; epsilon is the dielectric constant of the transmission medium in the pipeline; e (E) max Is the maximum electric field strength;
and the power calculation unit is used for calculating the output power of the high-frequency generator according to the maximum transmission energy density.
8. A memory comprising a software program adapted to be executed by a processor with the steps of the electromagnetic wave control method for pipe power transmission according to any one of claims 1 to 6.
9. An electromagnetic wave control apparatus for pipe power transmission, characterized by comprising a bus, a processor and a memory as claimed in claim 8;
the bus is used for connecting the memory and the processor;
the processor is configured to execute the set of instructions in the memory.
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| CN107004950A (en) * | 2014-10-21 | 2017-08-01 | At&T知识产权部有限合伙公司 | Method and apparatus for transmitting electromagnetic wave |
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| US9244190B2 (en) * | 2012-07-13 | 2016-01-26 | Osaka Electro-Communication University | Transmitting electric power using electromagnetic waves |
| US10679767B2 (en) * | 2015-05-15 | 2020-06-09 | At&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
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| CN107004950A (en) * | 2014-10-21 | 2017-08-01 | At&T知识产权部有限合伙公司 | Method and apparatus for transmitting electromagnetic wave |
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| 介质中的电磁能量密度及其损耗;韩光泽等;《郑州大学学报(理学版)》;20120915(第03期);全文 * |
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