基于光伏并网逆变器锁相环技术研究  

On the Phase-locked Loop Technology Based on Photovoltaic Grid Inverters

作　　者：丁稳房[1] 李志鹏[1] 余佳佳 孙青 胡乔波 

机构地区：[1]湖北工业大学电气与电子工程学院,湖北武汉430068 [2]国家电网咸宁供电公司,湖北咸宁437100 [3]国家电网襄阳供电公司,湖北襄阳441000

出　　处：《湖北工业大学学报》2015年第1期5-7,共3页Journal of Hubei University of Technology

摘　　要：在光伏并网系统中,准确并快速地检测到电网电压的频率、相位和幅值是必不可少的环节。利用DSP内部的捕获单元、通用定时器和比较单元,方便地实现了对电网电压和光伏发电输出电流的信号捕获,从而达到调频调相的目的,达到并网条件。选取电网电压正过零检测数字锁相环,设计了硬件实现电路,给出了软件流程图。实验结果验证了该方法的可行性和有效性。In the photovoltaic grid system,it is an essential part to detect the frequency,phase and amplitude of the grid voltage accurately and quickly.The voltage of grid and current of solar generation were easily collected by the capture unit,general timer and compare unit of DSP.The conditions of grid-connection about regulation of frequency and phase were achieved.In this paper,we selected the grid voltage zero-crossing detection digital phase-locked loop,and designed the hardware implementation circuit and the software flow pattern.Experimental results have demonstrated the feasibility and effectiveness of this method.

关 键 词：光伏并网 锁相环 数字信号处理器 

分 类 号：TM464[电气工程—电器]