In order to improve the speed regulation performance of marine natural gas engine power system and improve the maneuverability and safety of inland liquefied natural gas fuel powered ships

it is proposed to construct natural gas engine-battery hybrid power system. The MATLAB/simulink simulation model was established for the liquefied nat-ural gas engine power system and hybrid system

and the ship starting and changing load process was realized. Then the simulation results of the two simulation systems are analyzed. The variation range of ship speed in the process of changing load with the hybrid power system becomes larger.

and the stabilization time of the system is shortened. The maximum reduction of natural gas consumption was 19.6%

and the maximum reductions of NOX

CO

and HC emissions were 22.1%

18.5%

and 23.6%.