基于同步采样SDFT的高性能单相锁相环方法研究
A study on high-performance single-phase phase-locked loop method based on synchronous sampling SDFT
陈志博 1李学明 2甘韦韦 2高剑 3黄守道3
作者信息
- 1. 株洲中车时代电气股份有限公司,湖南 株洲 412001;湖南大学 电气与信息工程学院,湖南 长沙 410082
- 2. 株洲中车时代电气股份有限公司,湖南 株洲 412001
- 3. 湖南大学 电气与信息工程学院,湖南 长沙 410082
- 折叠
摘要
在电力机车及动车组的牵引传动控制系统中,网侧变流器通过锁相环获取相位信息并进行精确控制.牵引供电网电压的幅值及频率存在波动,而且网压经常出现严重畸变及含有大量谐波,复杂的电网环境对锁相环性能提出了很高的要求.文章结合同步采样,提出一种基于SDFT的高性能锁相环方法,并通过数字仿真及半实物仿真对所述方法的性能进行了验证.仿真结果表明,与其他几种主流的锁相环对比,该方法稳态锁相精度高,动态响应速度快,并有较强的谐波抑制能力与抗偏置能力,适宜在轨道交通领域应用.
Abstract
In the traction drive control system of electric locomotives and rolling stock,the grid-side converter obtains phase infor-mation through a phase-locked loop and carries out precise control.The voltage amplitude and frequency of the traction power supply network fluctuate,and the network voltage often has serious distortion and contains a large number of harmonics,so the complex grid en-vironment puts forward high requirements for the performance of phase-locked loops.In combination with synchronous sampling,this paper proposes a high-performance phase-locked loop method based on SDFT.The performance of this method was verified through dig-ital simulation and semi-physical simulation tests.The test results show that,compared with several other mainstream phase-locked loop methods,this method has high steady-state phase-locking accuracy,fast dynamic response speed,and strong harmonic suppression and anti-bias capability,and is suitable for application in the field of rail transit.
关键词
四象限变流器/同步采样/SDFT/锁相环/谐波抑制/抗扰性Key words
four-quadrant converter/synchronous sampling/SDFT/phase-locked loop/harmonic suppression/disturbance immunity引用本文复制引用
基金项目
中国中车科技研究开发计划项目(2022CYA050)
出版年
2024
NETL
NSTL
万方数据