电器与能效管理技术Issue(6)：81-85,5.DOI:10.16628/j.cnki.2095-8188.2017.06.015
基于滑动离散傅里叶变换的锁相环设计
Design of Phase Locked Loop Based on Sliding Discrete Fourier Transform
吴振军 1秦方圆 1杨凯2
作者信息
- 1. 郑州轻工业学院 电气与信息工程学院, 河南 郑州 450002
- 2. 国网河南省电力公司安阳供电公司, 河南 安阳 455000
- 折叠
摘要
Abstract
In order to ensure the photovoltaic (PV) grid inverter to operate in normal condition under voltage unbalance,frequency distortion and harmonic pollution,it is necessary to track the phase and frequency of the voltage quickly and accurately.For the large overshoot and long response time of double second-order generalized integrator frequency-locked loop(DSOGI-FLL),a PLL method based on sliding discrete Fourier transform (SDFT) was proposed.With the filtering characteristic of DFT and the moving average,the system frequency can be obtained accurately.The errors of the phase and frequency are corrected under the distortion,which achieves the rapid tracking of grid voltage.The simulation model was established in the Matlab/Simulink environment,and compared with DSOGI-FLL,it verifies that the SDFT-PLL can be quickly and accurately phase-locked in the context of grid voltage harmonics,amplitude and frequency mutation.关键词
三相不平衡/锁相环/滑动离散傅里叶变换/锁相Key words
three-phase voltage unbalanced/phase locked loop(PLL)/sliding discrete fourier transform(SDFT)/phase lock分类
信息技术与安全科学引用本文复制引用
吴振军,秦方圆,杨凯..基于滑动离散傅里叶变换的锁相环设计[J].电器与能效管理技术,2017,(6):81-85,5.
