A hybrid modulation method for single-phase quasi-Z source inverter

Single-phase quasi-Z source inverter (qZSI) needs large capacitance, and its switching loss is high when controlled by traditional SPWM. In this paper, a new modulation method for single-phase qZSI is proposed, which combines SPWM and pulse-width-amplitude modulation (PWAM), as a result of hybrid modulation. SPWM is employed at low dc-link voltage to avoid shoot-through state and act switching at low voltage stress; PWAM is used at high dc-link voltage to reduce switching actions. With the proposed hybrid modulation, switching actions and loss are reduced, also the required capacitance is significantly reduced. The simulation and experimental results verify the proposed hybrid modulation method. The lower size and higher efficiency are confirmed in the hybrid modulation controlled single-phase qZSI when compared to that with traditional SPWM.

[1]  Baoming Ge,et al.  Reliability, efficiency, and cost comparisons of MW-scale photovoltaic inverters , 2012, 2012 IEEE Energy Conversion Congress and Exposition (ECCE).

[2]  Shahrokh Farhangi,et al.  A Novel Pulse-Width and Amplitude Modulation (PWAM) Control Strategy for Power Converters , 2010 .

[3]  Baoming Ge,et al.  An Energy-Stored Quasi-Z-Source Inverter for Application to Photovoltaic Power System , 2013, IEEE Transactions on Industrial Electronics.

[4]  Baoming Ge,et al.  Modeling, Impedance Design, and Efficiency Analysis of Quasi- $Z$ Source Module in Cascaded Multilevel Photovoltaic Power System , 2014, IEEE Transactions on Industrial Electronics.

[5]  Fang Zheng Peng,et al.  Boost converter — Inverter system using PWAM for HEV/EV motor drive , 2012, 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[6]  Jianfeng Liu,et al.  A Digital Current Control of Quasi-Z-Source Inverter With Battery , 2013, IEEE Transactions on Industrial Informatics.

[7]  Fang Zheng Peng,et al.  Space Vector Pulsewidth Amplitude Modulation for a Buck–Boost Voltage/Current Source Inverter , 2014, IEEE Transactions on Power Electronics.

[8]  Baoming Ge,et al.  Pulse-Width-Amplitude-Modulated voltage-fed quasi-Z-source direct matrix converter with maximum constant boost , 2012, 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[9]  Yuan Li,et al.  Modeling and Control of Quasi-Z-Source Inverter for Distributed Generation Applications , 2013, IEEE Transactions on Industrial Electronics.

[10]  Hideaki Fujita,et al.  A three-phase voltage-source solar power conditioner using a single-phase PWM control method , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[11]  Shaojun Xie,et al.  Pulsewidth Modulation of Z-Source Inverters With Minimum Inductor Current Ripple , 2014, IEEE Transactions on Industrial Electronics.

[12]  Soon-Chan Hong,et al.  A New single phase double-conversion UPS using PWAM method , 2009, 2009 IEEE 6th International Power Electronics and Motion Control Conference.

[13]  Baoming Ge,et al.  A new grid-connected PV system based on cascaded H-bridge quasi-Z source inverter , 2012, 2012 IEEE International Symposium on Industrial Electronics.

[14]  Baoming Ge,et al.  An Effective Control Method for Quasi-Z-Source Cascade Multilevel Inverter-Based Grid-Tie Single-Phase Photovoltaic Power System , 2014, IEEE Transactions on Industrial Informatics.