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1 Polish Maritime Research

1 2015

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Study of harmonic detection methods under non-ideal conditions in ship power network

Xu X.-Y., Mindykowski J., Tarasiuk T., Cheng C.

Polish Maritime Research

2015

nr 3

82--89

An improved harmonic detection method based on average arithmetic is proposed. According to the research results, the designed solution uses an LPF (low-pass-filter) and a mean value module connected in series instead of the conventional mean value module, and simultaneously, a three-phase voltage phase-locked module instead of commonly used PLL (phase lock loop) module is applied in order to reduce the influence caused by three-phase distorted voltage and rapid variation of load. The experimental results show that the application of this solution leads to increase in the accuracy of harmonics detection for distorted three-phase voltage and rapid variation of load.