Review of Power Quality Issues in Maritime Microgrids

Tomasz Tarasiuk,Shantha Gamini Jayasinghe,Mariusz Gorniak,Josep M Guerrero,Viknash Shagar,Wenzhao Liu,Andrzej Pilat

doi:10.1109/access.2021.3086000

Abstract

This paper discusses contemporary problems concerning ship microgrids. It focuses on the role of power electronics and power quality issues, both conventional, such as voltage and frequency variations, and new issues, such as waveform distortions ensuing from the wide proliferation of power electronics in ship microgrids. The paper also contains a discussion on the provisions of the Unified Requirements of International Association of Classification Societies and other leading power quality standards in the industry, with an emphasis on Total Harmonic Distortion (THD) definition. An overview of power converters for high power applications in ships and their impact on ship networks is also given. Next, original results of various power quality phenomena recorded in ship microgrids are presented and commented on, followed by a review and recommendations for maritime microgrid modeling and signal processing methods for power quality assessment in the discussed systems. Finally, preliminary proposals for power quality control are presented.

Highlights

More electric technologies (METs) are becoming popular in the transportation sector as a promising solution to improve fuel efficiency and thereby reduce emissions
How can power quality in the systems be controlled and managed to ensure continuity of supply, to minimize the cost of energy generation and to improve fuel economy? This paper aims to answer the above questions
According to STANAG 1008, the Total Harmonic Distortion (THD) factor should be less than 5%, and any single-order harmonic should not exceed 3%

Summary

INTRODUCTION

More electric technologies (METs) are becoming popular in the transportation sector as a promising solution to improve fuel efficiency and thereby reduce emissions. Power electronics can create problems of its own in relation to power quality (PQ) in maritime microgrids, adding various kinds of waveform distortions to the notorious voltage and frequency variations [18]–[20]. This can lead to unwanted heat generation in generators and electric motors, unpredictable resonances, malfunction and failures of vital receivers. It describes the advent of power electronics and the resultant harmonic distortion phenomena as an impact on PQ.

SOURCES OF POWER QUALITY PROBLEMS IN SHIP MICROGRIDS

INSTANTANEOUS FREQUENCY VARIATIONS

IMPROVEMENTS OF POWER QUALITY IN SHIP SYSTEMS

Findings

CONCLUSION