Control of Power Electronic Converters
Technical Lecture Session
Control of DC-AC Inverters
current control, selective harmonic control, repetitive control, spatial harmonics, resonant control, grid-tied converters, electric machine drives
This paper proposes a selective harmonic spatial repetitive control (SHSRC) to actively regulate selected current harmonics of power converter systems over a wide fundamental frequency range. Previously proposed spatial repetitive control (SRC) applies fictive spatial samplers for extending the operating range of repetitive controllers to a wide range of fundamental frequencies. Based on the internal model principle, SRC can be further extended to SHSRC to precisely regulate specific sets of power harmonics, e.g., pk + q order harmonics. Compared to SRC, SHSRC offers better system dynamics without compromising steady-state performance. Compared to conventional selective harmonic repetitive control, it extends the scope of the application from fixed to wide ranges of varying fundamental frequencies. In comparison to a multi-resonant controller, it offers superior features such as easier design, implementation, and computational cost effectiveness. Experimental results are presented that demonstrate the effectiveness of SHSRC for regulating harmonics over a wide range of fundamental frequencies.