摘要
针对LCL并网逆变器电流谐波问题,在无源阻尼的基础上应用虚拟电阻法。再引入LCL并网逆变器的滤波电容电流作为电流内环,抑制LCL滤波器的高频谐振;利用并网电流的电流外环采用可以实现无静差跟踪PR控制器。通过仿真与实验结果分析验证了双电流闭环控制策略下的光伏并网逆变系统可以实现并网,改善电流谐波。
To solve the LCL grid-connected inverter harmonic current problem,the virtual resistance method is applied on the basis of passive damping. The filter capacitance current of LCL grid-connected inverter is introduced as the inner current loop to suppress the high-frequency resonance of LCL filter.PR controller can be realized by using current outer loop of grid-connected current. The simulation and experimental results verify that the grid-connected photovoltaic inverter system under the dual current control strategy can achieve grid-connected and improve current harmonic.
作者
蒙刚
傅强
李晓康
MENG Gang;FU Qiang;LI Xiao kang(College of Electrical Engineering,Qingdao University,Qingdao 266071,China)
出处
《电子设计工程》
2020年第4期6-9,22,共5页
Electronic Design Engineering
