Solid-state controller for three-phase permanent magnet synchronous generator-based diesel generator set feeding single-phase loads

This study deals with the voltage control and power quality improvement of a permanent magnet synchronous generator (PMSG)-based diesel generator (DG) set feeding single-phase loads using a solid-state controller. The proposed system consists of a PMSG driven by a diesel engine at constant speed, a three-leg voltage source converter (VSC) with a capacitor on its DC link and single-phase load connected between two terminals of the generator. Most of the domestic loads are single phase but three-phase generation is more reliable and efficient than single-phase generation. Therefore a three-phase PMSG is proposed for feeding such types of loads. The VSC is used as a solid-state controller to control the terminal voltage, to eliminate harmonics from the source currents and voltage and to provide load balancing while feeding single-phase loads from three-phase PMSG. An adaptive theory-based improved linear sinusoidal tracer (ILST)-based control algorithm with selectable frequency (ω_o) and bandwidth (Δ) is used to estimate balanced reference source currents. The main contribution of this study is the power quality improvement of PMSG-based DG set using a solid-state controller along with hardware implementation of a novel ILST-based control algorithm for voltage control across the load.