摘要
分析了单相两级式光伏并网逆变器的控制策略:在传统双PI控制基础上加入电网电压前馈及母线纹波补偿以降低并网电流谐波含量;分析了电压外环采用比例谐振(PR)调节器的控制方法具有良好的动态调节性能。与传统前后级分开控制不同,根据前后级功率平衡的原理,提出用前级最大功率点跟踪(MPPT)和母线控制器产生后级逆变参考电流的控制思路。既能稳住母线电压,又能降低母线电压纹波对并网波形的影响。
This paper presents a new voltage control scheme for the application of two-stage single-phase grid-connected photovoltaic （PV） system.Compared with the traditional control method, there is no subtraction between DC-link voltage and its reference.According to the power balance, the current reference multiplies the DC-link voltage and divides its reference and then acts as the current reference of the inverter.
出处
《电力电子技术》
CSCD
北大核心
2013年第5期53-55,共3页
Power Electronics
关键词
逆变器
光伏并网
两级式
inverter
photovohaic grid-connected
two-stage
