CN113890204A - Microwave power transmission system of space solar power station - Google Patents
Microwave power transmission system of space solar power station Download PDFInfo
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- CN113890204A CN113890204A CN202111171567.1A CN202111171567A CN113890204A CN 113890204 A CN113890204 A CN 113890204A CN 202111171567 A CN202111171567 A CN 202111171567A CN 113890204 A CN113890204 A CN 113890204A
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- mpt
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- transmission system
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- power transmission
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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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- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a microwave power transmission system of a space solar power station, which belongs to the field of microwave communication and has the characteristics of dispersion, independence and space convergence, wherein the system consists of a plurality of independent PV-MPT units to form an ultra-large phased array; the PV-MPT unit comprises a PV sub-board and an MPT sub-board; the PV sub-boards are not connected; each MPT daughter board is not connected; the PV sub-board is connected with the MPT sub-board through an electric wire to supply power to the MPT sub-board. When the transmission system operates, a 2.9GHz beacon machine at the center of the ground receiving area transmits a guiding beacon to the sky. The input signal on the MPT sub-board is a 2.9GHz beacon received by the dual-frequency antenna, and the output signal is a frequency multiplication conjugate amplification signal of the input signal and is transmitted out through the dual-frequency antenna. And forming a high-power microwave beam pointing to the ground receiving aperture by utilizing the convergence action of the array factors. The system of the invention saves a space power transmission system, and has high reliability, easy realization and convenient expansion.
Description
Technical Field
The invention belongs to the field of microwave communication, and relates to a microwave power transmission system of a space solar power station with the characteristics of dispersion, independence and space convergence.
Background
At present, a common microwave power transmission scheme of a space solar power station is to transmit high-voltage high-power to a microwave power transmission system MPT in a narrow satellite space, so that the whole transmission system is complex, redundant and unreliable.
Assuming that the power of the SSPS is 100 kilo-watts, a photovoltaic cell of 1 square meter in space can generate 1 kilowatt of electric power, and a total of 100 kilo-watts photovoltaic cells are required, and the total effective area is 1 square kilometer. In an ideal situation, in the scheme of the SSPS photovoltaic power generation and microwave power transmission integrated system, the microwave frequency is 5.8GHz, and the wavelength is 5 cm; the diameter of the space antenna is 1000 meters, and the diameter of the ground microwave footprint is 36000000 × 0.05/1000 ═ 360 × 5 ═ 1800 m. In the prior art:
the existing scheme 1: the high-power microwave transmission scheme for the space high-voltage high-power centralized power supply changes 100 ten thousand kilowatts of power generated by a photovoltaic cell into a space high-voltage high-power supply, then carries out short-distance high-voltage power transmission, and sends the power to a microwave transmission system with ultrahigh power to send the power to the ground. The drawbacks of this solution are: the formation of a direct-current high-voltage high-power, high-voltage distribution and power transmission system has high difficulty, and a corresponding high-power microwave transmission system is also needed, namely, a large parabolic antenna with the diameter of 1 kilometer, a 100 ten thousand kilowatt bayonet feed source, 100 ten thousand microwave sources with the power of 1 kilowatt are designed, and then 100 ten thousand microwave powers with the power of 1 kilowatt are combined into a 100 ten thousand kilowatt microwave power combiner. The above system configuration has no practical operability.
Existing scheme 2: in the scheme, the SSPS transmission system forms space high-voltage high-power electricity by a plurality of small electricity, the space high-voltage high-power electricity is converted into low-voltage high-power electricity through high-voltage short-distance concentrated transmission, the low-voltage high-power electricity is distributed to 100 ten thousand microwave generators, and the low-voltage high-power electricity is fed to 100 ten thousand array element phased array antennas and is sent back to the ground. It is known that high-voltage transmission needs to be bound with long-distance transmission, the longer the distance is, the higher the voltage is, and the short-distance transmission does not need high-voltage transmission, so the design idea of the scheme is simplified into complicated.
Therefore, a new microwave power transmission system for a space solar power station with a simple structure is needed.
Disclosure of Invention
In view of the above, the present invention provides a microwave power transmission system for a space solar power station, so that SSPS photovoltaic power generation and microwave power transmission form an integrated system, a high-voltage high-power transmission and distribution system is not required, and a plurality of (e.g. 100 ten thousand) PV sub-boards distributed in a range of several square kilometers are directly changed into microwaves through an MPT sub-board and are emitted to the ground, thereby greatly saving the power transmission cost.
In order to achieve the purpose, the invention provides the following technical scheme:
a microwave power transmission system of a space solar power station consists of a plurality of independent PV-MPT units to form an ultra-large phased array; the PV-MPT unit comprises a PV sub-board 1 and an MPT sub-board 2; the PV sub-boards are independent from each other and are not connected by a lead; each MPT (Microwave Power Transmission) daughter board is independent and is connected without a lead; the PV daughter board is connected with the MPT daughter board and supplies power to the MPT daughter board; wherein PV is photovoltaic.
Further, the PV sub-board supplies power to the corresponding MPT sub-board through a low-power wire.
Further, the two ends of the low-power wire 3 are provided with universal joints 4.
Further, the MPT daughter board includes a frequency source 21, a BPF (Band Pass Filter) 22, a mixer i 23 and a mixer ii 24, an Amplifier i 25 and an Amplifier ii 26, a BPA (Band Pass Amplifier) 27, and a dual-Band antenna 28.
When the whole microwave power integrated transmission system operates, a 2.9GHz beacon is arranged in the center of a ground receiving area to transmit a guide beacon to an overhead MPT area, a dual-frequency antenna receives a beacon signal, the beacon signal is filtered by BPF, then the beacon signal and a signal sent by a frequency source are subjected to frequency mixing I by a frequency mixer, then the signal is subjected to frequency mixing I by an amplifier I, a frequency mixer II, an amplifier II and BPA in sequence, finally a frequency doubling conjugate amplified signal is obtained, and the frequency doubling conjugate amplified signal is transmitted by the dual-frequency antenna.
Further, the frequency source is a quartz crystal oscillator and generates a 5.8GHz signal for sharing by all MPT daughter boards.
Further, the frequency of the input signal received by the dual-frequency antenna is 2.9GHz, and the frequency of the output power signal is 5.8 GHz.
Further, the MPT daughter board also comprises a low-power battery for storing electric energy.
The invention has the beneficial effects that:
1) the PV-MPT unit of the invention saves a huge space high-voltage high-power transmission system, thereby greatly saving the power transmission cost. The electricity generated by the PV sub-boards does not need to be transmitted, and the electricity is changed into microwaves to be emitted to a designated area on the ground in situ.
2) The invention saves a huge space and high power electricity storage system, and can store several ten thousand degrees of electric energy by using the low power batteries on the MPT daughter boards.
3) The universal joint is used at two ends of the low-power wire, and is suitable for any light-gathering and non-light-gathering system.
4) The transmission system greatly improves the reliability of the space solar energy and electric energy transmission system. Failure of a few PV-MPT units will not result in failure of the entire system, or even be unnoticed (e.g., half 50 ten thousand PV-MPT units are broken, and the other half PV-MPT units still form a microwave power transmission system, with only half less power and twice more ground microwave beam footprint). On the contrary, when any small element in the conventional large-space high-voltage high-power centralized power supply system is damaged, for example, a small wire is subjected to cold welding, the whole satellite can fail.
5) The system has the advantages of low cost, easy realization, building block structure and convenient expansion.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of an SSPS photovoltaic power generation and microwave power transmission integrated system of the present invention;
reference numerals: the antenna comprises a 1-PV daughter board, a 2-MPT daughter board, a 3-low-power wire, a 4-universal joint, a 21-frequency source, a 22-BPF, a 23-mixer I, a 24-mixer II, a 25-amplifier I, a 26-amplifier II, a 27-BPA and a 28-dual-frequency antenna.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1, the present embodiment provides an SSPS photovoltaic power generation and microwave power integrated transmission system, which does not require a high-voltage high-power transmission and distribution system, and a plurality of (e.g., 100 ten thousand) photovoltaic sub-boards distributed in a range of several square kilometers are directly changed into microwaves through an MPT sub-board and are emitted to the ground. The system specifically comprises a plurality of independent PV-MPT units, wherein each PV daughter board 1 is connected with an MPT daughter board 2 to form the PV-MPT unit; the PV daughter board 1 supplies power to the corresponding MPT daughter board 2 through a low-power wire 3, and the two ends of the low-power wire 3 are provided with universal joints 4. The MPT daughter board is shown in the lower block diagram of FIG. 1, and comprises a frequency source (quartz crystal oscillator, shared by all MPT daughter boards) 21 of 5.8GHz, BPF22, a mixer I23 and a mixer II 24, an amplifier I25 and an amplifier II 26, BPA27 and a dual-frequency antenna 28.
When the whole microwave power integrated transmission system runs, a 2.9GHz beacon machine at the center of the ground receiving area transmits a guiding beacon to the space MPT area so as to guide a high-power beam to transmit to the center of the receiving area. The input signal on the MPT sub-board is a 2.9GHz beacon received by the dual-frequency antenna, and the output signal is a frequency multiplication conjugate amplification signal of the input signal and is transmitted out through the dual-frequency antenna. Then, a plurality of PV-MPT unit dual-frequency antennas form a super large (such as 1 KM)2) Phased array. And forming a high-power microwave beam pointing to the ground receiving aperture by utilizing the convergence action of the array factors.
As a preferred embodiment, the MPT daughter board is further provided with a low power battery for storing electrical energy.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (7)
1. A microwave power transmission system of a space solar power station is characterized by having the characteristics of dispersion, independence and space convergence, and comprising a plurality of independent PV-MPT units to form an ultra-large phased array; the PV-MPT unit comprises a PV sub-board (1) and an MPT sub-board (2); the PV sub-boards are independent from each other and are not connected by a lead; the MPT sub-boards are independent from each other and are not connected by a lead; the PV daughter board is connected with the MPT daughter board and supplies power to the MPT daughter board; where MPT is microwave power transmission and PV is photovoltaic.
2. The space solar power station microwave power transmission system according to claim 1, characterized in that the PV sub-panels supply power to the corresponding MPT sub-panels through small power wires (3).
3. Space solar plant microwave power transmission system according to claim 2, characterized in that the low-power wires are provided with universal joints (4) at both ends.
4. The space solar power station microwave power transmission system according to claim 1, characterized in that the MPT daughter board comprises a frequency source (21), a BPF (22), a mixer i (23) and a mixer ii (24), an amplifier i (25) and an amplifier ii (26), a BPA (27) and a dual-band antenna (28); wherein BPF is a band-pass filter and BPA is a band-pass amplifier;
the dual-frequency antenna (28) receives an input signal, the input signal is filtered by the BPF (22), the frequency is mixed with a signal sent by the frequency source (21) through the mixer I (23), then the mixed signal sequentially passes through the amplifier I (25), the mixer II (24), the amplifier II (26) and the BPA (27), and finally a frequency multiplication conjugate amplification signal is obtained and is transmitted through the dual-frequency antenna (28).
5. The space solar power station microwave power transmission system of claim 4 wherein the frequency source is a quartz crystal oscillator producing a 5.8GHz signal for common use by all MPT daughter boards.
6. The space solar power station microwave power transmission system of claim 4 wherein the dual frequency antenna receives an input signal having a frequency of 2.9GHz and an output power signal having a frequency of 5.8 GHz.
7. The space solar power station microwave power transmission system of claim 4 wherein the MPT daughter board further comprises a low power battery for storing electrical energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111171567.1A CN113890204A (en) | 2021-10-08 | 2021-10-08 | Microwave power transmission system of space solar power station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111171567.1A CN113890204A (en) | 2021-10-08 | 2021-10-08 | Microwave power transmission system of space solar power station |
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| CN113890204A true CN113890204A (en) | 2022-01-04 |
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| CN202111171567.1A Pending CN113890204A (en) | 2021-10-08 | 2021-10-08 | Microwave power transmission system of space solar power station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024001396A1 (en) * | 2022-06-27 | 2024-01-04 | 东南大学 | Wireless energy transmission system with self-powered and beam self-tracking capability |
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2021
- 2021-10-08 CN CN202111171567.1A patent/CN113890204A/en active Pending
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| CN1457129A (en) * | 2002-04-15 | 2003-11-19 | 三菱电机株式会社 | Solar generating system in universe, portable low-power electronic apparatus, receiving antenna device and power system |
| CN106532985A (en) * | 2016-12-22 | 2017-03-22 | 电子科技大学 | High-power 2.45GHz microwave wireless power transmission system |
| CN108832728A (en) * | 2018-06-24 | 2018-11-16 | 西安电子科技大学 | A kind of wireless energy transfer system and method based on direction backtracking antenna |
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