一种基于电网电压不平衡的软件锁相方法  

A Method of Software Phase-locked Based on the Unbalanced Grid Voltage

作　　者：吴志清[1] 胡杨[1] 

机构地区：[1]合肥工业大学,电气与自动化学院,安徽合肥230009

出　　处：《电力电子技术》2015年第7期89-91,共3页Power Electronics

摘　　要：提出一种电网电压不平衡及谐波畸变时基波电压信号的检测方法,通过三相电网电压进行微分运算来构造线性方程组,并利用交流遗忘积分算法对分离信号进行滤波,快速准确地得到了不平衡电网电压中的正、负序基波分量的幅值与相位信息,从而使控制系统具备了良好的动态性能。实验表明了软件锁相方法的有效性。A method for detecting fundamental voltage based on the unbalanced grid voltage is proposed, linear equa-tions is constructed by three-phase grid voltage differential operation, and the AC forgotten integration algorithm isused for separating signal filtering, we can quickly and accurately obtain amplitude and phase of positive and negativesequence fundamental of the unbalanced grid voltage, so that the control system has good dynamic performance.Exper-imental results show the effectiveness of the software phase-locked method.

关 键 词：软件锁相 电网电压不平衡 遗忘积分算法 

分 类 号：TN911.8[电子电信—通信与信息系统]