摘要
分析了电压型逆变器常用的控制方法,根据光伏发电系统的特性指出固定开关频率法比滞环控制电流法更适合用于并网工作时逆变器的控制。并根据光伏发电系统的特性对固定开关频率法进行改进,逆变器电流参考信号由光伏器件输出功率及电网母线电压计算得到,从而控制逆变器输出电压与电网电压基本相同,有效减小并网环流。试验表明本文提出的方法能较好满足工作要求。
The control strategies of instantaneous current for inverters are discussed in detail. According to the theoretical results, the strategy of fixed switching frequency SPWM instantaneous control is a better choice for grid-connected inverter. The control strategy is modified to control the PV grid-connected inverter according to the PV output power and grid voltage. This method can reduce the circulation current remarkably. The vresented method is verified bv experimental results.
出处
《电气应用》
北大核心
2007年第4期58-60,共3页
Electrotechnical Application
关键词
光伏
逆变器
并网
电流控制
photovoltaic inverter grid-connected current control
