MARINE POWER PLANT Russian patent published in 2000 - IPC

FIELD: shipbuilding; marine power plants with shaft generators and semiconductor frequency converters. SUBSTANCE: power plant includes main engine connected with propeller by means of propeller shaft and shaft generator kinematically linked with main engine. Shaft generator is provided with stator winding interconnected regulation unit and excitation system which are connected with winding; they are also connected with excitation winding provided with current sensor. Stator of shaft generator is electrically connected with busbars of shipboard power consumers through semiconductor frequency converter provided with control system. Besides that, power plant includes auxiliary engine connected with auxiliary generator through decoupler. Generator is provided with self-excitation system which is connected with excitation winding fitted with current sensor and is electrically connected with busbars of the shipboard consumers; it is also provided with two-position selector switch connected with frequency and phase sensors mounted on shaft generator and on generator. It also includes switching units and independent DC sources of shaft generator and auxiliary generator. Excitation system of shaft generator is made in form of three-phase uncontrolled bridge-type rectifier, autonomous voltage inverter with control system, single-phase transformer and rectifier which are connected in series. EFFECT: enhanced reliability. 1 dwg