Hybrid electric propulsion system and starting method thereof

Abstract

The embodiment of the invention discloses a hybrid electric propulsion system and a starting method thereof, and the system comprises a starting switch which is used for generating a starting signal according to the inputted starting information; an uninterruptible power supply unit which is used for supplying power to the storage battery unit, the fuel cell unit and the energy comprehensive management module according to the starting signal, so that the storage battery unit, the fuel cell unit and the energy comprehensive management module complete self-inspection; an energy comprehensive management module which is used for judging whether the hybrid electric propulsion system meets a starting condition according to the self-checking information; a mode selection unit which is used for selecting a starting mode and generating a corresponding mode signal; the energy comprehensive management module is also used for starting the storage battery unit and the fuel cell unit according to the mode signal and allocating energy output of the two units; the storage battery unit and the fuel cell unit are used for supplying power to the direct-current bus to supply power to loads. The stability and safety of a power system are improved, the use characteristics and service life of a ship are guaranteed, and the effects of energy conservation and emission reduction are improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of ship power supplies, 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. For this reason, higher requirements are put forward for the research on the ship's power supply system and power supply strategy. [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...

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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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