电工技术学报2019，Vol.34Issue(2)：398-408,11.DOI:10.19595/j.cnki.1000-6753.tces.171632
基于构造非正交向量的单相锁相技术研究
Single-Phase Phase-Locked Technique Based on Constructing Non-Orthogonal Vector
陈四雄 1易龙强 1黄文俊 1林伟民1
作者信息
- 1. 厦门科华恒盛股份有限公司,厦门 361000
- 折叠
摘要
Abstract
For the phase tracking problem of single-phase voltage signals, a single-phase locked method with generating the non-orthogonal vector is proposed in this paper.After analyzing the traditional single-phase DQ PLL principle, a new phase detector is gained by constructing the non-orthogonal voltage vector based on adjacent time sampling data.A new phase discriminator is designed and applied to phase lock control of single-phase voltage signals.In addition, a phase locked control loop with double filters is designed aiming at the application in complex grid conditions.This design improves the precision of PLL control algorithm in harmonic grid conditions, and solves the problem of phase error caused by adding single filter.In this paper, the simulations of phase-locked system are carried out based on Matlab/Simulink, and the experimental prototype platform is built to verify the algorithm.The simulation and experimental results show that the proposed phase locked algorithm can accurately lock grid phase in complex grid conditions such as sudden change of phase, amplitude and frequency and harmonic disturbance, which shows a strong adaptability as well as excellent dynamic and steady performance.关键词
单相锁相环/鉴相器/非正交向量/滤波器Key words
Single-phase phase-locked loop/phase detector/non-orthogonal vector/filter分类
信息技术与安全科学引用本文复制引用
陈四雄,易龙强,黄文俊,林伟民..基于构造非正交向量的单相锁相技术研究[J].电工技术学报,2019,34(2):398-408,11.
