Energy properties of a hybrid DC generator with PMSM

In recent years, hybrid generator set systems have found wide application, especially in the construction of power plants for autonomous facilities, such as motor vehicles, ships and planes. This paper presents analytical and simulation tests of a hybrid power plant system based on a permanent magnet synchronous machine (PMSM) connected to battery operating in a DC network. As a result of the tests, energy and electromagnetic characteristics of such a power plant were obtained at variable PMSM speed and variable load. The characteristics obtained for the non-optimized system showed the amount of energy losses that increased significantly with the power of the power plant. Therefore, a method of energy optimization of such a power plant was proposed and a system control algorithm was developed and proven in simulation tests. The results of the research presented in this paper confirmed the effectiveness of the proposed solution.