Introducing a ship electric power quality monitoring system for green shipping

This paper presents a methodology for installing an electric power quality monitoring system onboard a ship in order to manage and optimize the power consumption of electric loads which are considered critical for the overall ship efficiency. The aftermath is a system comprises measuring devices for recording both voltage and current. The loggers are interconnected via a local intranet-preferably WiFi - to a computer located in the control room of the ship. This methodology was developed within the framework of a research project and the system was implemented onboard actual oil tanker. Specifically, this monitoring system comprises three devices, for three different motors, measuring both input voltage and current. The motors starting operation and equipment were changed. Thus, voltage and current measurements took place before and after the retrofitting so the corresponding energy consumption and power quality were compared.