Gasoline-electric hybrid propulsion system with synchronverter

Unmanned aerial vehicle (UAV) has been a hot topic in the aerospace field. The virtual synchronous machine (VSM) is a power electronic converter with the dynamic characteristics of the traditional synchronous machine. Synchronverter is a kind of VSM with dynamic reproduces of the traditional synchronous generator (SGs) and has a wide range of applications in distributed generation systems and microgrids. This paper reviews the existing and current developments of UAVs and introduces the Gasoline-electric hybrid propulsion system (GEHPS) for UAVs. The advantages and disadvantages of the three configurations of GEHPS are discussed. And the series GEHPS is selected as the research topic in this paper. The feasibility of using the synchronverter as a permanent magnet SGs rectifier for a series-connected GEHPS is then explored. We demonstrate the performance of our AC-DC converter through a series of simulations and compare it to the performance of currently existing systems. The results show that the new synchronverter-based converter enables the DC bus voltage to have better performance in terms of output active power oscillation and stability.