摘要
由于单相电网缺少自由度,采用闭环锁相技术检测单相电网的相位、频率和幅值等参数存在一定技术难度。针对此问题,研究了一种基于正交信号发生器(OSG)的单相锁相环(SPLL),不但有效解决了这一技术问题,而且从理论上分析了该SPLL的3个基本环节,然后建立了SPLL控制系统的小信号模型,根据小信号模型分析了控制系统的稳定性。最后,通过实验验证了所研究的SPLL能正确检测电网的参数,同时也证明该SPLL,具有较好的暂态特性和稳态特性。
Because single phase grid is lack of degree of freedom,there is a little technique difficulty through the closed loop phase-locked technology detecting the parameters such as：phase,frequency and amplitude of the single phase grid.According to the problem,the single-phase phase-locked loop（SPLL） based on orthogonal signal generator（OSG） is investigated.The technique difficulty is overcomed effectively and three components of the SPLL are theoretically analyzed.The small signal model of the SPLL is given,and the stability of the control system is analyzed.Finally,the experimental results prove that the SPLL can detect the parameters of the single phase grid,and the good transient state performance and the excellent steady-state performance of the SPLL have been verified through the experimental results.
出处
《电力电子技术》
CSCD
北大核心
2014年第11期23-25,共3页
Power Electronics
基金
湖北省教育厅科学技术研究项目(B20122506)~~
关键词
单相锁相环
正交信号发生器
暂态特性
single phase phase-locked loop
orthogonal signal generator
transient state performance
