Regulation of synchronous generators by means of hydrostatic transmissions

Abstract

Summary form only given as follows. In many applications within the engineering world, an isolated generator is needed (e.g. in ships). Diesel units (diesel engine and synchronous generator) are the most common solution However, the diesel engine can be eliminated if the energy from another source (e.g. the prime mover in a ship) is used to move the generator. This is the care for the shaft coupled generator, where the coupling between the mover and the generator is made via a hydrostatic transmission so that the mover can have different speeds and the generator is able to keep a constant frequency. The main problem of this system is the design of a speed governor that makes possible the desired behaviour. In this paper a simulation model is presented in order to analyse the behaviour of this kind of systems and to help in the speed governor design. The model is achieved with a parameter identification process also depicted in the paper. A comparison between simulation results and measurements is made to show the model validity.