基于双零序电压注入的单级多端口逆变器供电混合动力汽车功率分配控制

The single-stage multiport inverter (SSMI) is a promising power conversion solution for hybrid electric vehicles (HEVs) due to its advanced merits in single-stage power conversion without intermediate dc–dc converters. However, it is challenging to design a modulation scheme for SSMIs since it determines not only the stator current control but also the power distribution between the sources. In view of this, this article proposes a double zero-sequence voltage injection (DZSVI) scheme for the SSMI, where the motor drive and power distribution control can be decoupled, and control performance of stator current is not affected by the power distribution control. With the DZSVI, modulation signals are transformed from ac form into dc form by the first zero-sequence voltage (ZSV) injection, reducing the control variables for power distribution. Moreover, the dc form modulation signals can be directly employed for the source power calculation regardless of the time-varying dc source voltages, which simplifies the power distribution design. In the second ZSV injection, the port power distribution can be linearly regulated without extra switching times, which enhances the power conversion efficiency. Comparative experimental results confirm the effectiveness of the proposed DZSVI scheme.