Flying Start of Permanent Magnet Generator Connected PWM Rectifier Based on Short-Circuit-Current Vector Increments

Flying start of a permanent magnet generator (PMG) connected rectifier is a common requirement in practical applications. This paper proposes a novel flying start method using the short-circuit-current vector (SCCV) increments. The proposed method eliminates the limitations of conventional zero-voltage pulse methods that response currents need to be attenuated to zero before the next zero-voltage pulse is applied. As a result, the proposed method has a simpler start-up procedure and can be applied to cases such as loaded start-up and uninterrupted restart. A phase-locked loop (PLL) is employed to enhance the anti-noise interference ability. A seamless mode transfer structure is proposed to achieve a soft transition to the sensorless control. The effectiveness of the proposed method is verified by simulation.