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 shaft line and shaft generator kinematically linked with main engine. Shaft generator is provided with stator winding with control unit and excitation system which are connected with this winding and are also interconnected; they are connected with excitation winding provided with current sensor. Stator winding 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 and current sensor and is electrically connected with busbars of shipboard power consumers; besides that generator is provided with two-position selector switch connected with frequency and phase fitted 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 rectifier with neutral wire and pulse-width voltage converter with control system which are connected in series. Control unit is also made in form of voltage sensor and voltage regulator connected in series. EFFECT: enhanced reliability. 1 dwg