Comprehensive Performance Comparison and Optimization of Single-Pulse Controlled SRGs for Renewable Electrical Grids

Switched reluctance generators (SRGs) have been viewed as a promising candidate for back-up generation systems for renewable electrical grids. However, due to the nonlinear magnetic characteristic and multiple contradictory performance indexes of SRGs, their control can be complex and challenging. This paper presents a comprehensive comparison of machine efficiency, torque ripple, thermal behavior and acoustics during single-pulse operation. In addition to the discussion of turn-off angle θ
off
as performed in traditional single pulse control, the effect freewheeling period Δθ
fw
on the machine performance are also investigated. The simulation results show that although Δθ
fw
doesn’t dominate in the single objective optimization of torque ripple and acoustic behavior, it expands the possible solutions of low torque ripple and acoustic noise within high efficiency area, which provides more choices for comprehensive optimization.