Study of parallel operation of diesel generators of a ship power plant
Analysis of the power plants of a number of passenger ships showed the need to ensure the parallel operation of generators previously operating separately. The installed DGs are intended only for autonomous operation, which do not imply the introduction of statism into the characteristics of the generators. The aim of the study is to scope and implement the working condition of the ship power plants in accordance with the current requirements of the Russian River Register (RRR), which imply stable parallel operation of the diesel generator. As a result of the operation of the installed diesel engines, the complexity of precise control of the mechanical characteristics was determined, associated with the specifics of the operation of the mechanical frequency controllers installed on the engines. To determine the quality of mechanical RFI, functional and structural diagrams of the system for stabilizing the frequency of rotation of a drive motor with a mechanical regulator were developed, on the basis of which the transfer function was obtained and a conclusion was made about the instability of the regulator at large values of backlash in the mechanical transmission. The achievement of this goal is possible by replacing the mechanical RFI with an electronic one with an actuator, which is confirmed by a mathematical analysis of the corresponding control systems. The transfer functions of control systems are obtained on the basis of the developed structural and functional models. Electronic controllers, made according to the presented schemes, have been introduced on a number of marine diesel generator sets and tested positive. As a result of the study of the new system operation, the optimal parameters of the regulator settings were determined, at which the required dynamic and static characteristics were obtained. The failure-free operation of the system has been confirmed by long-term tests with the vessel operating in normal mode throughout the navigation.