Energy supply system of stratosphere solar energy airship and control method thereof

Abstract

The present invention discloses an energy supply system of a stratosphere solar energy airship and a control method thereof. The system comprises an energy monitoring unit and a solar generation unitand an energy storage unit which are connected with the energy monitoring unit. The solar generation unit is connected with a power supply bus in an airship through the energy storage unit, the energymonitoring unit comprises multiple generation paths, each generation path comprises one solar cell array, one MPPT module and one control switch module which are connected in order, and the energy monitoring unit controls output of each MPPT module and charge and discharge of the energy storage unit according to the power required by a load, and controls on-off of each control switch module according to the residual energy of the energy storage unit. The control method is configured to control the system mentioned above. The energy supply system of the stratosphere solar energy airship and the control method thereof are simple in structure, low in cost and high in energy supply efficiency and utilization rate, can meet the long-term continuous power supply demand of the stratosphere airship, and are stable and reliable, etc.

Description

technical field [0001] The invention relates to the technical field of stratospheric airships, in particular to an energy supply system and a control method for a stratospheric solar airship. Background technique [0002] An airship is an aircraft lighter than air. The biggest difference between it and a hot air balloon is that it has a device for propelling and controlling the flight state. The airbag of the hull is filled with a buoyant gas (hydrogen or helium) with a density lower than that of air to generate buoyancy to lift the airship into the air. The pod is used for passengers and cargo, and the tail surface is used for Control and maintain heading and pitch stability. With the technological advancement of new lightweight high-strength composite materials, great changes have taken place in the design and processing of skin, skeleton and other structures. development in three directions. [0003] The atmosphere is generally divided into six layers: the troposphere,...

AI Technical Summary

Problems solved by technology

[0005] (1) The method of carrying battery energy alone is used to provide power. However, due to the large size of the battery in this type of method, it is inconvenient to operate. Once it is used up and it is not charged in time, it can no longer provide energy. its charging

[0006] (2) The airship energy supply system is composed of hydrogen-oxygen fuel cells and lithium batteries. However, in this type of method, since the fuel cell is a disposable energy source, it cannot provide energy once it is used up.

[0007] (3) Copper indium gallium selenide thin-film solar cells and hydrogen-oxygen fuel cells jointly constitute the energy supply system of the airship, that is, during the day, the solar cell array generates power for the load, and in the case of insufficient sunlight during the day, the hydrogen-oxygen fuel cells and The solar power is combined to supply power to the load. During the solar power generation process, an MPPT module is used to track the output of the solar cell array, and the hydrogen-oxygen fuel cell is independently powered at night; however, the fuel cell in this type of method is a disposable energy source, and once it is used up, it cannot be reused. Provide energy, and the solar cell array is composed of multiple cell array strings connected, there are performance differences between each cell array string, when tracking the output of the entire solar cell array through an MPPT module, the performance between different cell array strings cannot be eliminated difference, leading to lower power generation efficiency. At the same time, if you need to adjust the solar output, you can only adjust the output of the entire solar cell array through the MPPT module. If you need to reduce the solar output, you need to reduce the output of all cell array strings at the same time, which will greatly reduce each The power generation efficiency of the battery array string is low, which makes the power supply efficiency of the whole system low, and the energy that can be provided is limited

[0008] For example, the above three energy supply systems all have certain defects, and cannot meet the needs of the airship for a long time in the air, and cannot realize the long-term stay in the air of the stratospheric airship

[0009] Chinese patent application CN102060107A discloses an energy supply system for a stratospheric electric-electric hybrid solar airship, which uses solar arrays as the main power supply, regenerative hydrogen-oxygen fuel cells and high-energy battery packs as auxiliary power sources, and the energy onboard The monitor is an energy distribution system, in which the output end of the solar cell array is connected to the MPPT module to realize the maximum power tracking of the solar cell array, and the MPPT module is connected to the controller through a DC-DC converter. As mentioned above, this scheme uses an MPPT module Tracking the output of the entire solar cell array will make the power generation efficiency low, and at the same time, the electric energy output by the MPPT module needs to be stored in the battery through the DC-DC converter, and a certain amount of energy will be consumed during the conversion process of the DC-DC converter, which will further Reduce the power generation efficiency of the system, so the power generation efficiency of the system is still not high, and cannot meet the needs of the airship for a long time in the air

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