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Power distribution method and system of distributed electric propulsion aircraft hybrid energy storage system

A technology of a hybrid energy storage system and a distribution method, which is applied in the field of power distribution of a hybrid energy storage system of a distributed electric propulsion aircraft, can solve problems such as the need to improve the dynamic stability of the bus voltage, and achieve improved anti-interference ability and dynamic stability, The effect of optimizing size and prolonging service life

Active Publication Date: 2022-02-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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Problems solved by technology

Compared with dynamic programming, model predictive control and fuzzy logic, it is simple and easy to implement, and has better real-time performance, but it still needs to be improved in terms of bus voltage dynamic stability

Method used

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  • Power distribution method and system of distributed electric propulsion aircraft hybrid energy storage system
  • Power distribution method and system of distributed electric propulsion aircraft hybrid energy storage system
  • Power distribution method and system of distributed electric propulsion aircraft hybrid energy storage system

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0051] Such as figure 1 and Figure 4 Shown: In order to improve the anti-interference ability and dynamic stability of the DC bus voltage when suddenly adding and unloading the load, the present invention includes a hybrid energy storage system that is adaptively connected to the DC bus of the distributed electric propulsion aircraft. The energy system includes batteries and supercapacitors; when performing power distribution on a hybrid energy storage system, it includes the steps of primary power distribution, secondary power distribution and tertiary power distribution, among which,

[0052] Determining the actual value of the bus voltage U of the DC bus during the initial power distribution dc and bus voltage reference The voltage difference between them, and the determined voltage difference is processed by a high-order sliding mode controller to obta...

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Abstract

The invention relates to a power distribution method and system, in particular to a power distribution method and system of a distributed electric propulsion aircraft hybrid energy storage system. During primary power distribution, a high-order sliding mode controller is used for processing a voltage difference value so as to obtain power to be provided or to be absorbed, and by means of the characteristics of the high-order sliding mode controller, buffeting can be effectively reduced, and steady-state errors can be effectively eliminated; during secondary power distribution, working intervals of the storage battery and the super capacitor are divided, automatic recovery control of the super capacitor is introduced, the reference power of the storage battery and the reference power of the super capacitor can be obtained through a low-pass filtering method, the HESS size is optimized, and the ESD service life is prolonged; and when the power is distributed for three times, the distribution power of the storage battery and the distribution power of the super capacitor are obtained through maximum power dynamic limitation, so that the anti-interference capability and the dynamic stability of the direct-current bus voltage when the load is suddenly loaded and unloaded are improved.

Description

technical field [0001] The invention relates to a power distribution method and system, in particular to a power distribution method and system for a hybrid energy storage system of a distributed electric propulsion aircraft. Background technique [0002] Distributed electric propulsion aircraft is a new type of aircraft. Several propellers are symmetrically distributed on the wings or fuselage of the distributed electric propulsion aircraft. The propellers include propellers or fans, and motors for driving the propellers or fans; Providing driving force through the propeller is expected to further improve the energy conversion efficiency of the aircraft power system and reduce fuel consumption. [0003] The electrical system of the distributed electric propulsion aircraft includes the propulsion system and the aircraft power supply system. The load of the distributed propulsion motor is supplied by the generator to achieve the purpose of comprehensive energy utilization and...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J7/34
CPCH02J7/0063H02J7/345H02J7/00302H02J7/00306
Inventor 卜飞飞李航孙建翎姚太克张玄雷瑞张杰孙鹏宇肖一民史健廷
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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