CN104538725A - Transmitting antenna system of space solar power station - Google Patents

Transmitting antenna system of space solar power station Download PDF

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Publication number
CN104538725A
CN104538725A CN201410715356.3A CN201410715356A CN104538725A CN 104538725 A CN104538725 A CN 104538725A CN 201410715356 A CN201410715356 A CN 201410715356A CN 104538725 A CN104538725 A CN 104538725A
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China
Prior art keywords
transmitting antenna
photovoltaic cell
transmit antennas
power transmission
wireless power
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CN201410715356.3A
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CN104538725B (en
Inventor
李勋
周金柱
段宝岩
黄进
杨阳
张逸群
范健宇
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Xidian University
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Xidian University
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators

Abstract

The invention discloses a transmitting antenna system of a space solar power station. The transmitting antenna system is funnel-shaped on the whole. The transmitting antenna system is characterized in that the funnel-shaped transmitting antenna system is formed by splicing and assembling a plurality of oblique curved structure units; each oblique curved structure unit comprises a supporting frame, a photovoltaic cell layer and a transmitting antenna layer mounted at the inner side of the supporting frame, and a radiation panel layer mounted at the outer side of the supporting frame, wherein the photovoltaic cell layer is disposed on the transmitting antenna layer; and each radiation panel layer comprises an oblique curved panel, an oscillator, a phase shifter, an amplifier, a power divider and connecting cables, wherein the oscillator, the phase shifter, the amplifier and the power divider are mounted on the oblique curved panel, and the shape of the oblique curved panel is consistent with a Bezier curve. The transmitting antenna system has the advantage that by adopting the oblique curved structure units, the problem of heat radiating is solved, the power-to-mass ratio of the system is improved, the problem that the requirement on the angle of incident sunlight is strict is solved, and the difficulty of focusing system design is reduced.

Description

The system of transmit antennas of Wireless power transmission
Technical field
The present invention relates to a kind of system of transmit antennas, be specifically related to a kind of system of transmit antennas of Wireless power transmission.
Background technology
Nineteen sixty-eight, Peter doctor Glaser of the U.S., on the basis that microwave wireless energy transmission technology develops, proposes the conception of building Wireless power transmission (Space Solar Power Satellite).Wireless power transmission refers at too airborne acquisition solar energy, then solar energy is converted to electric energy by photovoltaic cell, then by the electric power system of microwave transmission to ground.
USDOE (DOE) in 1979 and NASA (NASA) propose first SSPS Conceptual Design, be called as " 1979SPS baseline system ", this baseline system is at geostationary orbit (GEO) deploy 60 solar power satellites, every power satellite is of a size of 5km × 10km × 0.5km, 50km 2photovoltaic cell battle array control to point to the sun in real time by high-power rotating mechanism, transmitting antenna points to the earth, and the two is connected by universal joint.There are three shortcomings in this system: the first, and photovoltaic cell needs high-power rotating mechanism to control in real time to point to the sun; The second, photovoltaic cell area reaches 50km 2, need superhuge supporting girder structure; 3rd, photovoltaic cell battle array and transmitting antenna need to be connected by super high power conducting slip ring, realize difficulty large.
Late 1990s NASA proposes integrated symmetrical optically focused SSPS scheme, with reference to Fig. 1, the program utilizes 2 huge offset parabola condensers 101 to collect sunlight, then sunlight is gathered in the emission system 103 in " sandwich " structure by two secondary level crossings 102, and by emission system 103, microwave energy transferred out.With reference to Fig. 2, should the emission system 103 in " sandwich " structure be made up of photovoltaic cell 201, microwave change-over circuit 202 and transmitting antenna 203.Condenser 101 controls its angle of pitch by 2 axle rotating mechanisms and the sun is followed the tracks of at azimuth, and emission system 103 points to the earth.Adopt huge offset parabola condenser 101 can improve the sunlight intensity being irradiated to photovoltaic cell 201, improve photovoltaic cell 201 focusing ratio, greatly can reduce photovoltaic cell 201 area.Emission system 103, in " sandwich " structure, can shorten the length of photovoltaic cell 201, microwave change-over circuit 202 and transmitting antenna 203 connection cables, eliminate high power conductive slip ring, and be convenient to modularized design.But the used heat that in emission system 103, photovoltaic cell 201 and microwave change-over circuit 202 produce due to the restriction of conversion efficiency is difficult to leave, and there is hot concentration problem, system works efficiency can be caused to reduce.
The Paul Jaffe of United States Naval Research Laboratory in 2014 proposes a kind of emission system in " approximate funnel-form " in paper " Sandwich moduleprototype progress for space solar power ", with reference to Fig. 3, this emission system 301 is assembled by some ladder-type structure unit 302 splicings, global approximation funnel-form.With reference to Fig. 4, this ladder-type structure unit 302 is made up of photovoltaic cell 401, transmitting antenna 402 and radiant panel 403, wherein, radiant panel 403 is furnished with the devices such as oscillator, phase shifter, amplifier.Both photovoltaic cell 401 and transmitting antenna 402 integrate by emission system 301, are taken out as radiant panel 403 by microwave change-over circuit from " sandwich " structure.The heat problem in " sandwich " structure emission system can be solved to a certain extent by increase swept area, improve photovoltaic cell concentrating ratio, reduce system cost.But the requirement of this emission system 301 pairs of concentrators is very harsh, can only 100% reception vertical incidence sunlight, blocking of radiant panel 403 can be subject in varying degrees from the sunlight of other angle incidences.
Summary of the invention
The object of the present invention is to provide a kind of system of transmit antennas of Wireless power transmission, this system of transmit antennas can not only solve a heat radiation difficult problem, and the difficult problem that can solve incident sunlight angle requirement harshness, thus the design difficulty of condenser system can be reduced.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
A system of transmit antennas for Wireless power transmission, overall is funnel-form, it is characterized in that, aforementioned funnelform system of transmit antennas is assembled by the splicing of some oblique bent limits shape construction unit, and aforementioned oblique bent limit shape construction unit comprises:
Photovoltaic cell layer, transmitting antenna layer, radiating surface flaggy and support frame, aforementioned photovoltaic cell layer and transmitting antenna layer are arranged on the inner side of support frame, and photovoltaic cell layer is positioned at the top of transmitting antenna layer, aforementioned radiation panel layer is arranged on the outside of support frame;
Aforementioned radiation panel layer comprises: oblique bent limit shape panel, is arranged on oscillator, phase shifter, amplifier, power divider on the shape panel of aforementioned oblique bent limit, and connection cable;
Aforementioned photovoltaic cell layer produces direct current by opto-electronic conversion, direct current is converted to microwave by the oscillator on aforementioned radiation panel layer, phase shifter and amplifier, microwave distributes to aforementioned transmitting antenna layer by power divider, and is transferred out by microwave energy by transmitting antenna layer.
The system of transmit antennas of aforesaid Wireless power transmission, is characterized in that, aforementioned photovoltaic cell layer is made up of rib and the photovoltaic cell battle array be embedded in the grid of rib.
The system of transmit antennas of aforesaid Wireless power transmission, is characterized in that, the photovoltaic cell forming aforementioned photovoltaic cell battle array is three-junction gallium arsenide battery.
The system of transmit antennas of aforesaid Wireless power transmission, is characterized in that, aforementioned transmitting antenna layer is composite construction, and upper strata is substrate, and lower floor is antenna submatrix, and antenna submatrix adopts rectangular mesh layout, and aforementioned antenna submatrix is made up of some microband antenna units.
The system of transmit antennas of aforesaid Wireless power transmission, is characterized in that, aforesaid base plate is polyimide plate.
The system of transmit antennas of aforesaid Wireless power transmission, is characterized in that, the surface of aforementioned microband antenna unit is coated with layers of copper.
The system of transmit antennas of aforesaid Wireless power transmission, is characterized in that, aforementioned support frame adopts the hollow carbon fiber pipe of square bore to make.
The system of transmit antennas of aforesaid Wireless power transmission, is characterized in that, the shape of the oblique bent limit shape panel in aforementioned radiation panel layer meets Bezier, and aforementioned Bezier is:
B ( t ) = Σ i = 0 n n i P i ( 1 - t ) n - i t i , t ∈ [ 0,1 ]
In formula, P 0and P nfor starting point and the terminal of Bezier, P 1, P 2..., P n-1for the control point of Bezier.
The system of transmit antennas of aforesaid Wireless power transmission, is characterized in that, the shape of the oblique bent limit shape panel in aforementioned radiation panel layer meets 4 rank Beziers.
The system of transmit antennas of aforesaid Wireless power transmission, is characterized in that, on aforementioned 4 rank Beziers, and control point P 2be positioned at starting point P 0with terminal P 4the midpoint of line, control point P 1be positioned at from terminal P 4on the vertical straight line sent, control point P 3be positioned at from starting point P 0on the vertical straight line sent.
Usefulness of the present invention is:
1, by adopting oblique bent limit shape construction unit, solving a heat radiation difficult problem, improve the heat-sinking capability of system, photovoltaic cell is enable to bear higher sunlight intensity, improve photovoltaic cell utilance, reduce the area of photovoltaic cell, improve the power-mass ratio of system;
2, by adopting oblique bent limit shape construction unit, solving the difficult problem to incident sunlight angle requirement harshness, thus reducing the design difficulty of condenser system.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of the integrated symmetrical optically focused Wireless power transmission of " sandwich " formula;
Fig. 2 is the profile of the emission system in Fig. 1;
Fig. 3 is the composition schematic diagram of " stairstepping " integrated symmetrical optically focused Wireless power transmission;
Fig. 4 is the structural representation of ladder-type structure unit in Fig. 3;
Fig. 5 is the use schematic diagram of system of transmit antennas of the present invention in Wireless power transmission;
Fig. 6 is the structural representation of system of transmit antennas of the present invention;
Fig. 7 is the structural representation of the oblique bent limit shape construction unit in Fig. 6;
Fig. 8 is the assembling splicing schematic diagram of the oblique bent limit shape construction unit in Fig. 7;
Fig. 9 is the mentality of designing schematic diagram of the oblique bent limit shape construction unit in Fig. 7;
Figure 10 is the design process schematic diagram of the shape of oblique bent limit panel in Fig. 7;
Figure 11 is the structural representation of the photovoltaic cell layer in Fig. 7;
Figure 12 is the structural representation of the rib in Figure 11;
Figure 13 is the structural representation of the photovoltaic cell battle array in Figure 11;
Figure 14 is the structural representation of the transmitting antenna layer in Fig. 7;
Figure 15 is the structural representation of the substrate in Figure 14;
Figure 16 is the structural representation of the antenna array in Figure 14;
Figure 17 is the structural representation of the support frame in Fig. 7;
Figure 18 is the structural representation of the oblique bent limit panel in the radiating surface flaggy in Fig. 7.
The implication of Reference numeral in figure:
101-condenser, 102-level crossing, 103-emission system, 201-photovoltaic cell, 202-microwave change-over circuit, 203-transmitting antenna, 301-emission system, 302-ladder-type structure unit, 401-photovoltaic cell, 402-transmitting antenna, 403-radiant panel, 601-system of transmit antennas, 602-oblique bent limit shape construction unit, 701-photovoltaic cell layer, 702-transmitting antenna layer, 703-radiating surface flaggy, 704-support frame.
Embodiment
System of transmit antennas of the present invention is used in Wireless power transmission, with reference to Fig. 5, sunlight collected by 2 huge offset parabola condensers, and sunlight is gathered on system of transmit antennas 601 of the present invention by two secondary level crossings, and is transferred out by microwave energy by system of transmit antennas 601.
Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.
With reference to Fig. 6, system of transmit antennas 601 entirety of the present invention, in funnel-form, is spliced by some (being generally hundreds thousand of) oblique bent limit shape construction unit 602 and is assembled.
With reference to Fig. 7, oblique bent limit shape construction unit 602 comprises: photovoltaic cell layer 701, transmitting antenna layer 702, radiating surface flaggy 703 and support frame 704.Wherein, photovoltaic cell layer 701 and transmitting antenna layer 702 are arranged on the inner side of support frame 704, and photovoltaic cell layer 701 is positioned at the top of transmitting antenna layer 702; Radiating surface flaggy 703 is arranged on the outside of support frame 704.The structure of support frame 704 as shown in figure 17, preferably adopts the hollow carbon fiber pipe of square bore to make.
Some oblique bent limits shape construction unit 602 is joined end to end, carries out assembling splicing, form structure as shown in Figure 8; Then some structures are as shown in Figure 8 connected side by side, carry out assembling splicing, final the formation structure shown in Fig. 6, i.e. system of transmit antennas of the present invention.
In oblique bent limit shape construction unit 602, radiating surface flaggy 703 comprises: oblique bent limit shape panel (as shown in figure 18), be arranged on oscillator (not shown), phase shifter (not shown), amplifier (not shown), the power divider (not shown) on the shape panel of oblique bent limit, and the connection cable of interface unit (not shown).
Oblique bent limit shape panel is, the dispel the heat the very corn of a subject structures such as difficulty harsh to incident sunlight angle requirement that solve emission system existence in the past.
Introduce the shape of oblique bent limit shape panel below in detail.
In space, radiation is unique radiating mode, in order to allow photovoltaic cell layer bear higher sunlight intensity, must increase swept area.
The straight radiant panel of the stairstepping proposed by United States Naval Research Laboratory becomes bent radiant panel, as shown in Fig. 9 (A), the area of radiant panel can be increased like this, radiating effect can improve, but straight flange being become Qu Bianhou can bring two negative effects: one is that sunlight incidence is blocked in the first half branch on bent limit; Two is the Lower Half branch blocking microwave radiation on bent limit.
In order to overcome this two shortcomings, present invention employs such design: first straight flange is become hypotenuse, then hypotenuse being become oblique bent limit on this basis, as shown in Fig. 9 (B).
Adopt such design, finally define oblique bent limit shape panel as shown in figure 18.This structure considerably increases the area of radiant panel, and radiating effect can be better, and do not affect solar light irradiation and transmitting antenna microwave, can receive the incident sunlight of greater angle scope simultaneously, reduce the designing requirement to concentrator.
As the preferred scheme of one, the shape of oblique bent limit shape panel meets Bezier, and Bezier is defined as:
B ( t ) = Σ i = 0 n n i P i ( 1 - t ) n - i t i , t ∈ [ 0,1 ]
In formula, P 0and P nfor starting point and the terminal of Bezier, P 1, P 2..., P n-1for the control point of Bezier, control point determines the trend of Bezier.
More preferably, the shape of oblique bent limit shape panel meets 4 rank Beziers.With reference to Figure 10, on this 4 rank Bezier, in order to ensure curve symmetric, control point P 2be positioned at starting point P 0with terminal P 4the midpoint of line, control point P 1be positioned at from terminal P 4on the vertical straight line sent, control point P 3be positioned at from starting point P 0on the vertical straight line sent.From the character of Bezier, by mobile control point P 1with control point P 3, just can obtain with control point P 1with control point P 3the straight line at place is asymptotic difform Bezier, thus can design variform oblique bent limit shape panel.
System of transmit antennas of the present invention, its operation principle is as follows:
Photovoltaic cell layer 701 produces direct current by opto-electronic conversion, direct current is converted to microwave by the oscillator on radiating surface flaggy 703, phase shifter and amplifier, microwave distributes to transmitting antenna layer 702 by power divider, is transferred out by microwave energy by transmitting antenna layer 702.
As the preferred scheme of one, with reference to Figure 11, photovoltaic cell layer 701 is made up of rib and the photovoltaic cell battle array be embedded in the grid of rib.
The structure of rib as shown in figure 12.Rib preferably adopts aerolite to make.
The structure of photovoltaic cell battle array as shown in figure 13.The preferred three-junction gallium arsenide battery of photovoltaic cell of composition photovoltaic cell battle array.
As the preferred scheme of one, transmitting antenna layer 702 is composite construction, with reference to Figure 14, upper strata is substrate (as shown in figure 15), the preferred polyimide plate of substrate, and lower floor is antenna submatrix, antenna submatrix adopts rectangular mesh layout, and the antenna array of formation as shown in figure 16.Each antenna submatrix forms by some microband antenna units.
More preferably, the surface of each microband antenna unit is coated with layers of copper.
In sum, system of transmit antennas of the present invention, by adopting oblique bent limit shape construction unit, not only solves a heat radiation difficult problem, and solves the problem to incident sunlight angle requirement harshness, effectively reduce the design difficulty of condenser system.
It should be noted that, above-described embodiment does not limit the present invention in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection scope of the present invention.

Claims (10)

1. the system of transmit antennas of Wireless power transmission, overall in funnel-form, it is characterized in that, described funnelform system of transmit antennas was assembled by some oblique bent limit shape construction unit (602) splicings, and described oblique bent limit shape construction unit (602) comprising:
Photovoltaic cell layer (701), transmitting antenna layer (702), radiating surface flaggy (703) and support frame (704), described photovoltaic cell layer (701) and transmitting antenna layer (702) are arranged on the inner side of support frame (704), and photovoltaic cell layer (701) is positioned at the top of transmitting antenna layer (702), described radiating surface flaggy (703) is arranged on the outside of support frame (704);
Described radiating surface flaggy (703) comprising: oblique bent limit shape panel, is arranged on oscillator, phase shifter, amplifier, power divider on the shape panel of described oblique bent limit, and connection cable;
Described photovoltaic cell layer (701) produces direct current by opto-electronic conversion, direct current is converted to microwave by oscillator, phase shifter and the amplifier on described radiating surface flaggy (703), microwave distributes to described transmitting antenna layer (702) by power divider, and is transferred out by microwave energy by transmitting antenna layer (702).
2. the system of transmit antennas of Wireless power transmission according to claim 1, is characterized in that, described photovoltaic cell layer (701) is made up of rib and the photovoltaic cell battle array be embedded in the grid of rib.
3. the system of transmit antennas of Wireless power transmission according to claim 2, is characterized in that, the photovoltaic cell forming described photovoltaic cell battle array is three-junction gallium arsenide battery.
4. the system of transmit antennas of Wireless power transmission according to claim 1, it is characterized in that, described transmitting antenna layer (702) is composite construction, upper strata is substrate, lower floor is antenna submatrix, antenna submatrix adopts rectangular mesh layout, and described antenna submatrix is made up of some microband antenna units.
5. the system of transmit antennas of Wireless power transmission according to claim 4, is characterized in that, described substrate is polyimide plate.
6. the system of transmit antennas of Wireless power transmission according to claim 4, is characterized in that, the surface of described microband antenna unit is coated with layers of copper.
7. the system of transmit antennas of Wireless power transmission according to claim 1, is characterized in that, described support frame (704) adopts the hollow carbon fiber pipe of square bore to make.
8. the system of transmit antennas of the Wireless power transmission according to claim 1 to 7 any one, is characterized in that, the shape of the oblique bent limit shape panel in described radiating surface flaggy (703) meets Bezier, and described Bezier is:
B ( t ) = Σ i = 0 n n i P i ( 1 - t ) n - i t i , t ∈ [ 0,1 ]
In formula, P 0and P nfor starting point and the terminal of Bezier, P 1, P 2..., P n-1for the control point of Bezier.
9. the system of transmit antennas of Wireless power transmission according to claim 8, is characterized in that, the shape of the oblique bent limit shape panel in described radiating surface flaggy (703) meets 4 rank Beziers.
10. the system of transmit antennas of Wireless power transmission according to claim 9, is characterized in that, on described 4 rank Beziers, and control point P 2be positioned at starting point P 0with terminal P 4the midpoint of line, control point P 1be positioned at from terminal P 4on the vertical straight line sent, control point P 3be positioned at from starting point P 0on the vertical straight line sent.
CN201410715356.3A 2014-11-28 2014-11-28 The transmitting antenna system of Wireless power transmission Expired - Fee Related CN104538725B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111427384A (en) * 2020-04-03 2020-07-17 西北大学 Solar power station and method capable of expanding line focusing space
CN112329239A (en) * 2020-11-05 2021-02-05 黑龙江科技大学 Photovoltaic module series branch output characteristic curve modeling method under variable working conditions
CN115241638A (en) * 2022-06-24 2022-10-25 四川大学 Light and thin rectifying antenna coplanar and integrated with solar thin-film battery

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Publication number Priority date Publication date Assignee Title
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CN104114957A (en) * 2011-12-18 2014-10-22 奥尔哈马能量有限公司 System and method for solar energy utilization

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Publication number Priority date Publication date Assignee Title
US20080283109A1 (en) * 2007-01-22 2008-11-20 John Carlton Mankins Space solar power system for thermochemical processing and electricity production
US20130099599A1 (en) * 2011-06-20 2013-04-25 The Government Of The Us, As Represented By The Secretary Of The Navy Thermally Efficient Power Conversion Modules for Space Solar Power
CN104114957A (en) * 2011-12-18 2014-10-22 奥尔哈马能量有限公司 System and method for solar energy utilization

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111427384A (en) * 2020-04-03 2020-07-17 西北大学 Solar power station and method capable of expanding line focusing space
CN111427384B (en) * 2020-04-03 2022-03-22 西北大学 Solar power station and method capable of expanding line focusing space
CN112329239A (en) * 2020-11-05 2021-02-05 黑龙江科技大学 Photovoltaic module series branch output characteristic curve modeling method under variable working conditions
CN115241638A (en) * 2022-06-24 2022-10-25 四川大学 Light and thin rectifying antenna coplanar and integrated with solar thin-film battery

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