增强型锁相环的启动优化和相频解耦改进算法

何来沛; 郑寿森; 祁新梅; 黄玉和

doi:10.13471/j.cnki.acta.snus.2019.07.10.2019B067

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增强型锁相环的启动优化和相频解耦改进算法

研究论文 | 更新时间：2023-11-01

- 增强型锁相环的启动优化和相频解耦改进算法
- Start-up optimization and phase-frequency decoupling strategyforenhanced phase-locked loop
- 中山大学学报(自然科学版) 2020年59卷第4期页码：64-73
- 作者机构：
  
  中山大学物理学院，广东广州 510275
- 作者简介：
  
  何来沛(1995年生)，男；研究方向：并网逆变控制；E-mail：help3@mail2.sysu.edu.cn
  郑寿森(1963年生)，男；研究方向：嵌入式系统设计、电力电子控制技术；E-mail：zhengshs@mail.sysu.edu.cn
- 基金信息：
  
  广东省科技计划项目(2017A050506023);珠海市宽禁带半导体电力电子技术重点实验室项目(20167612042080001)
- DOI：10.13471/j.cnki.acta.snus.2019.07.10.2019B067
  中图分类号： TM761
- 纸质出版日期：2020-07-20，
  
  收稿日期：2019-07-10，
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何来沛,郑寿森,祁新梅等.增强型锁相环的启动优化和相频解耦改进算法[J].中山大学学报(自然科学版),2020,59(04):64-73.

HE Laipei,ZHENG Shousen,QI Xinmei,et al.Start-up optimization and phase-frequency decoupling strategyforenhanced phase-locked loop[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2020,59(04):64-73.
何来沛,郑寿森,祁新梅等.增强型锁相环的启动优化和相频解耦改进算法[J].中山大学学报(自然科学版),2020,59(04):64-73. DOI： 10.13471/j.cnki.acta.snus.2019.07.10.2019B067.

HE Laipei,ZHENG Shousen,QI Xinmei,et al.Start-up optimization and phase-frequency decoupling strategyforenhanced phase-locked loop[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2020,59(04):64-73. DOI： 10.13471/j.cnki.acta.snus.2019.07.10.2019B067.

摘要

锁相环结构中相位和频率紧密耦合，在电网处于干扰或短时故障工况下，同步频率的波动直接影响锁相的性能。基于假线性增强型锁相环(pseudolinear enhanced phase-locked loop

PL-EPLL)，提出了一种适时解除相位和频率耦合的改进算法。该算法能够在设计锁频范围内，增强频率同步的稳定性和抗干扰能力，提高锁相的动态性能。另外，针对PL-EPLL具有两个相位锁定状态的特点，在算法实施上采用一种同步相位初始值优化设置，在初始相位差较大的情况下能够有效提高锁相算法的启动速度。最后，通过仿真和实验验证了改进算法的有效性。

Abstract

In this paper

a modified pseudolinear enhanced phase-locked loop (PL-EPLL) is proposed to improve the performance of PLL synchronization when the power grid is under non-ideal condition

such as disturbances and faults. The modification is based on a timely-decoupling strategy between the estimated phase-angle and the estimated frequency

for which in a designable frequency-locked range

the robustness of frequency synchronization is enhanced and the dynamic performance of PLL is improved. In addition

based on the feature that PL-EPLL has two different phase-locked points

an optimized setting of the initial value of the estimated phase-angle is introduced in this paper

which can statistically improve the start-up speed of the PL-EPLL algorithm. Finally

the feasibility of the proposed method has been verified by simulation and experimental results.

关键词

增强型锁相环假线性增强型锁相环相频解耦锁相启动

Keywords

EPLLPL-EPLLphase-frequency decouplingPLL start-up

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