In this paper, the research background, the significance and the development of harmonic suppression in the world at present are introduced. Afterwards, the characteristics of harmonics of marine electric network are analyzed, and a combined harmonic suppression system composed of series Active Power Filter (APF) aided by shunt Passive Filter (PF) and Active Power Factor Correction Circuit (APFCC) is designed. Then the system is simulated in the Matlab/Simulink software, the simulation result show that the system designed is reasonable. Finally, the technologies of harmonic suppression in marine electric network are summarized, and the application of relevant technologies is forecast.
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