Electric loads characterization in an aircraft carrier with ring-bus distribution system

The increase in installed power onboard ships and the adoption of electric propulsion led to the need of a rather complex power system. The so-called Integrated Power System (IPS) feeds all the ship loads, integrating into a single entity the functions of generation, regulation, distribution and utilization of the electric power. The integration, thus being a powerful tool to increase vessel's performance, reliability and efficiency, permits also the propagation of disturbances to all the users fed by the IPS. Being Power Quality a primary need for the loads (and especially for some particular military ones) it is needed an assessment of the disturbances that can occur in the power system, both in terms of voltage and frequency transients and in terms of harmonic distortion. In this paper is presented a measurement campaign to assess disturbance levels and performance of a Naval vessel.