Dynamic Modeling of a Supply Vessel Power System for DP3 Protection System

Abstract

The work is focused on modeling and simulation of a supply vessel from a static and dynamic perspective in an integrated way. Modern marine vessels with electric propulsion are becoming more and more complex systems. Therefore, there is a strong necessity to develop models capable to integrate different subsystems in order to evaluate the overall performance under faults conditions, harsh weather and other critical situations. In particular, the focus of the work is to highlight the need to implement zonal protection scheme to respect DP3 (Dynamic Position 3) constraints in case of severe busbar faults, operating the system with the main tie breaker closed. The model developed is characterized with a complete representation of a Platform Supply Vessel (PSV). The model represents also the full protection system (static and dynamic) in accordance to fine-tuning conducted on the real system. In this work, the innovative contribution is the investigation of the shortterm dynamics after a busbar faults with a detailed electric model of the full network taking into account zonal power system protections and load shedding actions. The work is also focused on representing the electromechanical model of the propulsion power converters

Optimal Sizing of Energy Storage Systems for Shipboard Applications

“…The reserve of power SR j can be set depending on the ship's operating condition, i.e. for a supply vessel for example, this reserve can be increased in dynamic positioning (DP) in order to guarantee stringent level of reliability [30]. The minimum time for the DGs to be down and up are defined in equations (21) and (22).…”

Efficiency Improvement of a Natural Gas Marine Engine Using a Hybrid Turbocharger

“…Most importantly for the purpose of auxiliary drivers, it permits reverse power flow, different from the traditional diode bridge rectifier, even if cost is significantly increased. This is extremely important since it allows to use the EM-G as motor to accelerate the turbocharger rotor and control it in a very precise and fast way with respect to the mechanical dynamics [30]. …”

Modeling and Real-Time Scheduling of DC Platform Supply Vessel for Fuel Efficient Operation

“…The representative vessel comprises of four DEs coupled with the synchronous generators (P DG ) and one PV-based ESS (P ESS ). The total generation capacity can be illustrated as per (1). The generators are interfaced with two level voltage source converter (2L-VSC) acting as an active front end rectifier and PV-based ESS is integrated via dc/dc converter for dc bus voltage and active/reactive power control P Gen = {P DG n , P ESS ||n = 1 : 4}.…”

“…As compared with the land-based power systems, marine vessels have loads pertaining to different marine missions. Variable frequency propulsion system (L propulsion ) comprises of main propulsion (MP) systems to cater for the cruising loads (L C L ); tunnel thrusters (TTs) and retractable thrusters (RTs) to cater for the DP load (L DP ) [1]. The total connected propulsion load is illustrated as L propulsion = {L C L , L DP }.…”

“…P LATFORM supply vessel (PSV) plays a major role in the marine industry because of its ability to perform cruising and dynamic positioning (DP) operation [1]. Development of marine integrated power systems has enabled the marine loads esp.…”