作　　者： ; ;

机构地区： 中山火炬职业技术学院

出　　处： 《通信电源技术》 2015年第4期17-18 41,41,共3页

摘　　要： 三相光伏并网发电系统是一个典型非线性系统,受电网和外部环境的影响,系统存在许多不确定性干扰。针对系统的工作特点,通过无差拍PWM控制方法来实现逆变电流快速跟踪电网电流。为了验证控制方法的有效性,搭建了基于DSP控制的3 kW三相光伏并网发电系统。实验结果表明,该方法具有良好的稳态特性和动态特性,实现了与网压同步的正弦电流输出,提高了系统的效率和可靠性。 Three-phase grid-connected photovoltaic(PV)generation system is a typical nonlinear system.Affected by the grid and external environment,there are many uncertain disturbances in the system.According to the system characteristics,inverter current tracking grid current timely can be achieved by deadbeat PWM control.To evaluate effectiveness of the control method,a3 kW three-phase photovoltaic grid-connected generation system based on DSP control is set up.The experimental results show that the output power of PV system has good steady-state and dynamic characteristics.The proposed method can ensure that the output current is synchronized with sinusoidal grid voltage,and improves efficiency and reliability of the system.

关 键 词： 光伏发电 并网 无差拍控制 控制器

领　　域： [电气工程]