Power Quality Problems on Ships with Electrical Propulsion

The diesel-electric propulsion systems are flexible and have many advantages such as lower emissions, saves fuel, low noise and vibrations, more reliable and others. The main difficulties are related to the electric losses, power quality and electromagnetic compatibility. To overcome these difficulties, more research is needed. In the present article, an experimental study of the mentioned problems has been made. A physical model of alternating current (AC) electric propulsion system in low voltage settings is built. The instantaneous values of voltages and currents are measured and quantitive and qualitative indicators of electrical energy are calculated.