摘要
提出一种新型Quasi-Z源逆变器拓扑,该拓扑是将2个传统的电流连续型Quasi-Z拓扑进行并联。对比于传统Quasi-Z源逆变器,该拓扑的输入侧电流连续,有效降低阻抗网络中的一个电容的电压,提高了升压比,有效降低了器件电压应力,提高了系统的可靠性。通过采用SVPWM最大恒定升压调制策略进行调制,设计了基于dq坐标系电流解耦及阻抗网络电容电压恒定的原理控制,并将该拓扑应用于三相并网系统。
This paper presented a new Quasi-Z source inverter topology, this topology consist of two parallel traditional Quasi-Z source inverter. Compared with traditional Quasi-Z source inverter,the input current of this topology continuity, one of the two capacitors voltage is decreased and the transfer ratio is improved. The devisee voltage stress is effective decreased and the stability of the system is improved. Using SVPWM modulation strategy the control system based on the principle of the dq axis current decoupling and impedance network capacitor voltage constant is designed. And the topology is applicated on the three-phase grid-connected system .
出处
《电源学报》
CSCD
2015年第2期99-106,共8页
Journal of Power Supply
