A hybrid electric propulsion system and starting method thereof

Abstract

The embodiment of the present invention discloses a hybrid electric propulsion system and its starting method. The system includes: a starting switch for generating a starting signal according to input starting information; The unit and the integrated energy management module supply power, so that the storage battery unit, the fuel cell unit and the integrated energy management module complete self-inspection; the integrated energy management module is used to judge whether the hybrid electric propulsion system meets the start-up conditions according to the self-inspection information; the mode selection unit, It is used to select the starting mode and generate the corresponding mode signal; the integrated energy management module is also used to start the battery unit and the fuel cell unit according to the mode signal and adjust the energy output of the two; the battery unit and the fuel cell unit are used to supply power to the DC bus to power supply to the load. It improves the stability and safety of the power system, ensures the use characteristics and service life of the ship, and improves the effect of energy saving and emission reduction.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of ship power supplies, and in particular, to a hybrid electric propulsion system and a starting method thereof. Background technique [0002] Ships are the main means of transportation at sea. The existing technology usually uses diesel engines, steam turbines or gas turbines as the main power source according to the tonnage and use of the ships. Diesel engines, steam turbines and gas turbines all use combustion to generate energy. This process is accompanied by A large amount of pollutants are discharged, and the energy conversion efficiency is not high. Therefore, higher requirements are put forward for the research on the power supply system and power supply strategy of ships. [0003] Patent 201110181489.3 in the prior art proposes a hybrid power supply system, which includes a plurality of power modules connected in series, each of which includes a hydrogen fuel cell unit and a l...

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Problems solved by technology

[0003] Patent 201110181489.3 in the prior art proposes a hybrid power supply system, including a plurality of power modules connected in series, each of which includes a hydrogen fuel cell unit and a lithium ion battery unit, and the hydrogen fuel cell has pollution-free, low The characteristics of noise and high efficiency solve the problem of pollutant discharge and low energy conversion efficiency

However, the hybrid power system cannot guarantee the safety of the power system on board when it is started, and in the end only the hydrogen fuel cell unit outputs externally, and the lithium-ion battery no longer outputs externally. When the output of the power module is not enough to maintain the output current, the power supply Cutting off the external output of the module will cause the instability of the power system, affect the use characteristics and service life of the devices on the ship, and cannot achieve effective energy saving and emission reduction

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