Power-Take-Off (PTO. Power-Take-In (PTI)/Power-Take-Home(PTH) Systems PTO/PTI/PTH systems use and electric machine connected to the main propulsion engine to either generate electric power and/or provide power for propulsion. This machine can be either in-line, where the generator/motor is connected in-line of the main propulsion shaft, or parallel to the main propulsion engine, where the generator/motor is connected to the propulsion shaft through a gearbox. To make comparison and analysis of the different electric network and systems easier, only synchronous machines will be used to develop the different PTO/PTI/PTH models, see above models. The models will be created to switch from a motor to a generator to provide propulsion power or electrical power respectively, depending to operational load of the main engine and the operational profile of the reference ship, i.e. sailing speed and auxiliary power demands at given times. The model will simply consist of a synchronous motor/generator model, a gearbox model connecting it to main engine and propulsion shaft models already created for the INOMANS2HIP libraries and combined to create the system models, see chapter 6.7 and 7. This, therefore, will require the reference ship’s specification, sailing and operational profile to enable the PTO/PTI/PTH system models to be created. Selection of the reference ship will be later in this project and reported in Deliverable D1.2 (due May 2014).
