摘要
提出了一种基于新型Z源逆变器的光伏水泵系统,阐述了Z源逆变器的工作原理及其带直通零矢量的SVPWM控制策略。由于独特的Z网络的存在,逆变器不会因逆变桥臂的误触发而遭到损坏,而且在系统不附加其它升压环节的情况下,输出电压仍可比输入电压高。系统控制方法采用光伏阵列电压和Z源电容电压双闭环控制,通过阵列电压环对光伏阵列进行最大功率点的跟踪,Z源电容电压闭环控制的目的是稳定Z源电容电压,从而对整个Z源逆变器的可靠运行提供保证。
A photovoltaic pump system based on a new Z-source inverter, whose theory and control strategy of space vector pulse width modulation （SVPWM） with short through states were introduced. Because of the special Z network, the inverter will not encounter being destroyed when both switches in the same phase leg are turned on. Furthermore, the output voltage can be boosted even without additional boosting devices. Two close loops of PV army and Z-source-capacitor voltage are adopted. Also, the maximum power point tracking of PV pump system was discussed. The close loop of Z-source- capacitor voltage is to make the Z-source-capacitor voltage steady, which makes operation of whole inverter reliable.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2009年第5期628-632,共5页
Acta Energiae Solaris Sinica
关键词
Z源逆变器
光伏水泵系统
双闭环控制
最大功率点跟踪
Z-source inverter
photovoltaic pump system
two close loops
maximum power point tracking
