摘要
提出利用归一化最小均方(NLMS)算法的自适应单相锁相环(PLL),鉴相环节后通过自适应滤波器将两倍电网频率分量滤出,并且当电网发生畸变或受到干扰时,NLMS算法不断迭代来更新其权向量,从而达到准确、快速锁定电网频率的目的。通过Matlab/Simulink仿真进行建模分析,并基于DSP-TMS320F28335芯片搭建硬件实验平台进行模拟并网实验,仿真和实验结果验证了所提方法的有效性。
An adaptive single-phase phase-lock loop(PLL)based on the normalized least mean square(NLMS)algorithm is proposed.After the phase detection loop,the adaptive filter uses the NLMS algorithm to filter out the twice power grid frequency component,up-dating its weight vector iteratively in case of distortion or interference,resulting in fast and precise power grid frequency locking.Modeling and analysis are carried out through Matlab/Simulink,as well as through simulated grid-connected experiments on a hardware experimental platform based on the DSPTMS320F28335 chip.The simulation and experimental results confirm the validity of the proposed method.
作者
巫付专
李冰
朱永胜
苗斌玉
WU Fu-zhuan;LI Bing;ZHU Yong-sheng;MIAO Bin-yu(Zhongyuan University of Technology,Zhengzhou 451191,China)
出处
《电力电子技术》
北大核心
2023年第12期33-35,56,共4页
Power Electronics
基金
国家自然科学基金(61973157)
河南省高等学校重点科研项目计划基础研究专项(22ZX011)。
关键词
单相锁相环
归一化最小均方算法
余弦反馈型
single-phase phase-lock loop
normalized least mean square algorithm
cosine feedback type
