摘要
在PWM整流器的控制算法中,SVPWM因具有比SPWM更高的电压(电流)利用率而得到广泛的应用。但是当这两种控制算法在应用于有源逆变(如太阳能并网发电,电流源型APF)却呈现了完全相反的实验特性。基于根据指令电流产生触发脉冲时SPWM和SVPWM的不同机理,以能量传输和面积等效原理为依据,讨论了电流型SVPWM和SPWM输出电流特征,得到了在相同条件下,有源逆变时SPWM比SVPWM具有更高的电流利用率的结论,给出了SPWM和SVPWM电流型逆变器的仿真和实验结果,并以此为基础,以提高能源利用率为目的,提出了双向电流型PWM控制的新思路。
Among the control algorithm of current source PWM rectifier,SVPWM is applied widely because it has higher current utilization factor than SPWM.But when the two control method is applied to active inverters（grid-connected photovoltaic system and current source APF for example）,they present a wholly opposite characteristic.The current source inverter output characteristic controlled by SPWM and SVPWM are analyzed and contrasted in detail based on power delivery,area equivalent theorem and the different mechanism of the two algorithms when trigger pulses are produced according to the current command.The conclusion is draw that at the same condition when worked as an inverter,SPWM can output higher invert current.The simulation and test result is presented and a new control way of bi-direction CSI to obtain higher current utilization factor is presented.
出处
《电工技术学报》
EI
CSCD
北大核心
2011年第11期39-44,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(60971077)
