A Novel Hybrid Advanced Cophase Power Supply Equipment With Its Operation Control Strategy
Xin Wang, Qi Guo, Chunming Tu, Lei Wang, Fan Xiao, Jiaming Luo, Yuchao Hou
Abstract
The advanced cophase power supply system provides an opportunity to eliminate the problems of neutral section and power quality issues. However, the existing schemes still have drawbacks, such as numerous power electronic devices, high initial cost, and poor reliability. Therefore, in this article, a novel hybrid advanced cophase power supply equipment (NH-ACPSE) is proposed based on the existing traction transformer. By the common dc bus of each port, the secondary ripple power of the input ports can be offset. Also, the number of active/passive devices and capacitance capacity can be reduced. Then, aiming at the secondary ripple and load power impact on the dc side, a composite control strategy of NH-ACPSE is proposed to solve the harmonic transmission and impact fluctuation effectively. Finally, the feasibility and reliability of the proposed equipment and its control strategy are verified by simulation and experiment.