CN217087518U - Single-wire remote transmission electric energy system - Google Patents
Single-wire remote transmission electric energy system Download PDFInfo
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- CN217087518U CN217087518U CN202122147234.7U CN202122147234U CN217087518U CN 217087518 U CN217087518 U CN 217087518U CN 202122147234 U CN202122147234 U CN 202122147234U CN 217087518 U CN217087518 U CN 217087518U
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Abstract
The utility model discloses a remote transmission electric energy system of single-conductor, including frequency-raising converter, step-up transformer, single-conductor transmission line, step-down transformer and frequency-reducing converter, the alternating current is connected to the input of frequency-raising converter, and the input of step-up transformer is connected to the output of frequency-raising converter, and the input of step-down transformer is connected through single-conductor transmission line to the output of step-up transformer, and the input of frequency-reducing converter is connected to the output of step-down transformer, the utility model discloses the system comprises frequency-raising converter, step-up transformer, remote single-conductor transmission line, step-down transformer, frequency-reducing converter. Reduce the investment of the cable of construction land used and transmission line, improve the transmission efficiency of electric energy, realize the utility model aims at.
Description
Technical Field
The utility model relates to an electric power tech field specifically is a single-conductor remote transmission electric energy system.
Background
In a remote electric energy transmission system, the traditional mode is that three-phase three-wire system power frequency is used for transmission, the occupied area is large, the investment cost of cables is large, the construction cost is high, the energy consumption of lines is large, the transmission efficiency is low, and the number of fault points is large.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a single-wire remote transmission electric energy system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a remote transmission electric energy system of single-wire, includes frequency up converter, step-up transformer, single-wire transmission line, step-down transformer and frequency down converter, the alternating current is connected to the input of frequency up converter, and the input of step-up transformer is connected to the output of frequency up converter, and the input of step-down transformer is connected through single-wire transmission line to the output of step-up transformer, and the input of frequency down converter is connected to the output of step-down transformer, and the output alternating current of frequency down converter to load, frequency up unit and frequency down unit are used for adjusting the frequency parameter of electric energy in transmission process, voltage up unit and step-down unit are used for adjusting the voltage level of electric energy in transmission process.
As a further technical scheme of the utility model, the alternating current carries out the electric energy transmission through single-phase autotransformer again.
As a further technical scheme of the utility model, the up-converter comprises preceding stage power frequency diode bridge rectifier, intermediate filter capacitor and back level high frequency bridge inverter, realizes power frequency single phase alternating current-stable direct current-high frequency single phase alternating current two-stage electric energy transform.
As a further technical scheme of the utility model, booster, single-conductor transmission unit, step-down unit are a whole.
As a further technical scheme of the utility model, single-conductor transmission line carries out the transmission of electric energy with an electric energy directive property wire, and the outside diameter of cable line size is 4mm, takes the insulating layer, and 1 cable is built on stilts applies or buries ground and lays.
As a further technical scheme of the utility model, the frequency conversion unit that reduces comprises high frequency diode bridge rectifier, intermediate filter capacitor and back level power frequency three-phase inverter, realizes that high frequency single phase alternating current-stable direct current-power frequency three-phase exchanges two-stage electric energy and changes.
As a further technical solution of the present invention, the electric energy transmission frequency in the transmission system is selected according to the following formula: according to c ═ λ f; wherein λ is the wavelength; n λ/2; n is 1, 2, 3; where l is a transmission distance, and f ═ c/λ ═ cn/2l, where c is a constant, can be derived from the above two equations, and in the case where the transmission distance l is determined, the larger the value of n, the larger f.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses the system comprises step-up converter, step-up transformer, remote single conductor transmission line, step-down transformer, the frequency reduction converter. Reduce the investment of the cable of construction land used and transmission line, improve the transmission efficiency of electric energy, realize the utility model aims at.
Drawings
Fig. 1 is an overall block diagram of the present invention.
Fig. 2 is a circuit diagram of the present invention.
Fig. 3 is a circuit diagram of the PWM-to-voltage signal module.
FIG. 4 is a standing wave pattern along a single conductor current and voltage.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, example 1: the utility model provides a remote transmission electric energy system of single-wire, includes frequency up converter, step-up transformer, single-wire transmission line, step-down transformer and frequency down converter, the alternating current is connected to the input of frequency up converter, and the input of step-up transformer is connected to the output of frequency up converter, and the input of step-down transformer is connected through single-wire transmission line to the output of step-up transformer, and the input of frequency down converter is connected to the output of step-down transformer, and the output alternating current of frequency down converter to load, frequency up unit and frequency down unit are used for adjusting the frequency parameter of electric energy in transmission process, voltage up unit and step-down unit are used for adjusting the voltage level of electric energy in transmission process.
And the alternating current passes through the single-phase autotransformer and then carries out electric energy transmission.
The frequency raising frequency converter consists of a front-stage power frequency diode bridge rectifier, a middle filter capacitor and a rear-stage high-frequency bridge inverter, and realizes power frequency single-phase alternating current-stable direct current-high frequency single-phase alternating current two-stage electric energy conversion.
The booster, the single-conductor transmission unit and the voltage reduction unit are integrated.
The single-wire transmission line is used for transmitting electric energy by using one electric energy directional wire, the outer diameter of the cable is 4mm, an insulating layer is arranged, and the cable is laid overhead or buried.
The frequency-reducing and frequency-converting unit consists of a high-frequency diode bridge rectifier, an intermediate filter capacitor and a rear-stage power frequency three-phase inverter and realizes high-frequency single-phase alternating current-stable direct current-power frequency three-phase alternating current two-stage electric energy conversion.
The frequency modulation range of the up-converter unit and the down-converter unit is 1kHz to 100kHz, and the resolution adjustment frequency of 0.1 kHz.
Example 2 on the basis of example 1, the power transmission frequency in the transmission system is selected according to the following formula: according to c ═ λ f; wherein λ is the wavelength; n λ/2; n is 1, 2, 3; where l is a transmission distance, and f ═ c/λ ═ cn/2l, where c is a constant, can be derived from the above two equations, and in the case where the transmission distance l is determined, the larger the value of n, the larger f.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a single-wire remote transmission electric energy system, includes frequency up converter, step-up transformer, single-wire transmission line, step-down transformer and frequency down converter, its characterized in that, the alternating current is connected to the input of frequency up converter, and the input of step-up transformer is connected to the output of frequency up converter, and the input of step-down transformer is connected through single-wire transmission line to the output of step-up transformer, and the input of step-down transformer is connected to the output of step-down converter, and the output of step-down converter exports the alternating current to the load.
2. A single conductor long distance transmission electric power system of claim 1 wherein the ac power is transmitted through a single phase autotransformer.
3. The single conductor remote transmission electric energy system of claim 1, wherein the up-converter is composed of a front stage power frequency diode bridge rectifier, a middle filter capacitor and a rear stage high frequency bridge inverter.
4. The single conductor remote transmission power system of claim 1 wherein said step-up transformer, single conductor transmission unit, and step-down unit are integral.
5. The single-conductor long-distance transmission electric energy system as claimed in claim 4, wherein the single-conductor transmission line is used for transmitting electric energy by using a directional electric energy conductor, the outer diameter of the cable is 4mm, and the cable is provided with an insulating layer and is laid in an aerial mode or a buried mode.
6. The single-conductor long-distance transmission electric energy system as claimed in claim 4, wherein the frequency down-conversion unit is composed of a high-frequency diode bridge rectifier, an intermediate filter capacitor and a rear-stage power-frequency three-phase inverter, and realizes high-frequency single-phase alternating current-stable direct current-power-frequency three-phase alternating current two-stage electric energy conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122147234.7U CN217087518U (en) | 2021-09-07 | 2021-09-07 | Single-wire remote transmission electric energy system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122147234.7U CN217087518U (en) | 2021-09-07 | 2021-09-07 | Single-wire remote transmission electric energy system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217087518U true CN217087518U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202122147234.7U Active CN217087518U (en) | 2021-09-07 | 2021-09-07 | Single-wire remote transmission electric energy system |
Country Status (1)
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| CN (1) | CN217087518U (en) |
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2021
- 2021-09-07 CN CN202122147234.7U patent/CN217087518U/en active Active
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