CN-120200544-B - Spatially distributed concentrating energy system

CN120200544BCN 120200544 BCN120200544 BCN 120200544BCN-120200544-B

Abstract

The invention relates to a spatially distributed concentrating energy system which comprises a power generation unit, an energy storage unit, a power management unit and a space intelligent sun tracking mechanism. The power generation unit can convert solar energy into electric energy by combining a concentrated solar energy technology, the energy storage unit can store the electric energy, the power generation unit is connected with the power management unit, the power management unit is connected with the energy storage unit and manages electric energy output by the power generation unit to be cooperatively stored in the energy storage unit, the power management unit is also connected with the space intelligent sun tracking mechanism and an external load system in a power supply mode, the power generation unit comprises a plurality of groups of power generation modules and a support structure, and the plurality of groups of power generation modules are arranged on the support structure and connected with the power management unit. The energy system provided by the invention can improve the photoelectric conversion efficiency of the solar battery and reduce the cost of equipment.

Inventors

ZHANG SHANCONG
SANG XIAORU
ZHANG ZHEYU
TU YUNHONG
FENG JIANGTAO
SHI JIANFANG

Assignees

北京星辰未来空间技术研究院

Dates

Publication Date: 20260505
Application Date: 20250324

Claims (6)

1. The spatially distributed concentrated energy system is characterized by comprising a power generation unit, an energy storage unit, a power management unit and a space intelligent sun tracking mechanism; The power generation unit can convert solar energy into electric energy by combining a concentrating solar technology; The energy storage unit can store electric energy; The power generation unit is connected with the power management unit; the power management unit is connected with the energy storage unit and is used for managing the electric energy output by the power generation unit to be cooperatively stored in the energy storage unit; the power management unit is also in power supply connection with the space intelligent sun tracking mechanism and an external load system; the power generation unit comprises a plurality of groups of power generation modules and a bracket structure; The support structure is arranged on the space intelligent sun tracking mechanism and can enable the power generation modules to aim at sunlight in real time under the control of the space intelligent sun tracking mechanism for high-efficiency power generation; each group of power generation modules comprises a main mirror, a secondary mirror bracket, a secondary mirror, a light guide structure and a receiver; the main mirror is arranged on the bracket structure and is responsible for carrying out first reflection and convergence on sunlight, the shape of the main mirror is a parabolic spherical surface or a nearly parabolic spherical surface, the structure and the material have excellent planar heat conduction capability, the optical characteristics of the surface of the sun facing surface are high sunlight reflectivity and high infrared emissivity, and the optical characteristics of the surface of the back-to-back surface are high infrared emissivity; The secondary mirror support is arranged on the support structure or the frame of the main mirror; The secondary mirror is arranged on the secondary mirror bracket, and can reflect the sunlight collected by the primary mirror for the second time and focus the sunlight to the receiver; the light guide structure is arranged on the receiver and is in a light funnel shape, and incident light rays converged by the secondary mirror can be reflected for multiple times to finally reach the receiver; the receiver is arranged at the bottom of the main mirror and can convert solar energy collected by the main mirror and the secondary mirror in sequence into electric energy; the receiver is connected with the power management unit and can store the converted electric energy into the energy storage unit under the control of the power management unit; The main mirrors of the power generation modules can be arranged in an array mode and combined into an integrally formed structure, the support structure is of a frame-shaped structure, and the integrally formed structure is arranged on the frame-shaped structure.
2. The spatially distributed concentrated energy system of claim 1, wherein, The power management unit dynamically adjusts the maximized total energy output of each power generation module as a model function as follows: ; E total represents the total energy output of the system, n is the number of power generation modules, E i is the energy output of the ith module, P i represents the set of operating parameters of the ith module, t represents time, and W is space condition.
3. The spatially distributed concentrated energy system of claim 2, wherein, The space intelligent sun tracking mechanism comprises a supporting mechanism, a sensor assembly, a driving mechanism, a control mechanism and a thermal control mechanism; the sensor assembly, the driving mechanism, the control mechanism and the thermal control mechanism are all arranged on the supporting mechanism; The control mechanism is respectively connected with the sensor assembly, the driving mechanism and the thermal control mechanism; the sensor assembly is capable of accurately measuring the angle of the sun relative to the power generation unit; the driving mechanism can adjust the angle of the power generation unit according to the instruction of the control mechanism; The thermal control mechanism is capable of maintaining the various components within the system within a suitable operating temperature range in space.
4. The spatially distributed concentrated energy system of claim 1, wherein, The receiver is any one of a concentrating solar cell and a photo-thermal power generation device.
5. The spatially distributed concentrated energy system of claim 1, wherein, The power generation unit is provided with an ultraviolet protective film which can be replaced on the orbit; The ultraviolet protective film can prevent ultraviolet rays from penetrating through the film in a reflection, scattering and absorption mode, and has high transmittance for sunlight in visible light and infrared wave bands.
6. The spatially distributed concentrated energy system of claim 1, wherein, The energy storage unit type comprises any one of a solid-state battery, a lithium battery and a super capacitor.

Description

Spatially distributed concentrating energy system Technical Field The invention belongs to the technical field of space energy, and particularly relates to a space distributed concentrating energy system. Background In the field of aerospace today, space energy systems are critical supports for the normal operation of a spacecraft. Among these, rigid solar wings and flexible solar wings are the two most common spatial energy harvesting devices that play an important role in different aerospace tasks. Rigid solar wings generally use high strength materials such as aluminum plates, carbon fibers, etc. as substrates on which solar cells are firmly mounted. The flexible solar wing is mainly characterized by good flexibility and foldability. The solar cell is integrated on a thin and flexible substrate material such as a glass fiber board, a polyimide film and the like. Whether rigid or flexible solar cells are adopted, three-junction gallium arsenide solar cells are mostly adopted, and with the large-scale application of high-power communication satellites and computing satellites, the requirements for large-area solar wings are greatly increased, and the price of the three-junction gallium arsenide solar cells in unit area is high, so that the large-scale application of the three-junction gallium arsenide solar cells is severely limited. The traditional solar wing adopts a non-condensing solar cell, and has the main defects of relatively low photoelectric conversion efficiency and high price, and severely limits the large-scale application of the solar wing. Taking the most mature gallium arsenide solar cell as an example, the conversion efficiency of the traditional three-junction gallium arsenide cell is about 30%, and the concentrating solar cell has the efficiency reaching 31% -41% through a multi-junction structure and a concentrating technology, and the theoretical limit is higher. The price of the traditional three-junction gallium arsenide battery is 15-30 ten thousand yuan/square meter. Disclosure of Invention First, the technical problem to be solved Aiming at the existing technical problems, the invention provides a space distributed condensing energy system. (II) technical scheme In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps: A spatially distributed concentrated energy system comprises a power generation unit, an energy storage unit, a power management unit and a space intelligent sun tracking mechanism. The power generation unit can convert solar energy into electric energy by combining a concentrating solar technology; The energy storage unit can store electric energy; The power generation unit is connected with the power management unit; The power management unit is connected with the energy storage unit and is used for managing the electric energy output by the power generation unit to be cooperatively stored in the energy storage unit. The power management unit is also in power supply connection with the space intelligent sun tracking mechanism and an external load system; the power generation unit comprises a plurality of groups of power generation modules and a bracket structure; The power generation modules are arranged on the support structure and connected with the power management unit; the support structure is arranged on the space intelligent sun tracking mechanism, and can enable the power generation modules to aim at sunlight in real time under the control of the space intelligent sun tracking mechanism, so that the solar energy generating system is used for generating power with high efficiency. Preferably, the power management unit dynamically adjusts the maximized total energy output of each power generation module as a model function as follows: E total represents the total energy output of the system, n is the number of power generation modules, E i is the energy output of the ith module, P i represents the operation parameter set of the ith module, t represents time, and W is an external factor such as space condition. Preferably, the space intelligent sun tracking mechanism comprises a supporting mechanism, a sensor assembly, a driving mechanism, a control mechanism and a thermal control mechanism; the sensor assembly, the driving mechanism, the control mechanism and the thermal control mechanism are all arranged on the supporting mechanism; The control mechanism is respectively connected with the sensor assembly, the driving mechanism and the thermal control mechanism; the sensor assembly is capable of accurately measuring the angle of the sun relative to the power generation unit; the driving mechanism can adjust the angle of the power generation unit according to the instruction of the control mechanism; The thermal control mechanism is capable of maintaining the various components within the system within a suitable operating temperature range in space. Preferably, the power generation module compris