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无直流分量干扰的自适应锁频环同步优化方法

刘玉芝 张鑫宇 卞建鹏 胡立强

刘玉芝, 张鑫宇, 卞建鹏, 等 . 无直流分量干扰的自适应锁频环同步优化方法[J]. 北京航空航天大学学报, 2017, 43(9): 1798-1804. doi: 10.13700/j.bh.1001-5965.2016.0672
引用本文: 刘玉芝, 张鑫宇, 卞建鹏, 等 . 无直流分量干扰的自适应锁频环同步优化方法[J]. 北京航空航天大学学报, 2017, 43(9): 1798-1804. doi: 10.13700/j.bh.1001-5965.2016.0672
LIU Yuzhi, ZHANG Xinyu, BIAN Jianpeng, et al. Synchronization optimization method of adaptive frequency-locked loop without DC component interference[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(9): 1798-1804. doi: 10.13700/j.bh.1001-5965.2016.0672(in Chinese)
Citation: LIU Yuzhi, ZHANG Xinyu, BIAN Jianpeng, et al. Synchronization optimization method of adaptive frequency-locked loop without DC component interference[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(9): 1798-1804. doi: 10.13700/j.bh.1001-5965.2016.0672(in Chinese)

无直流分量干扰的自适应锁频环同步优化方法

doi: 10.13700/j.bh.1001-5965.2016.0672
基金项目: 

国家自然科学基金 51307112

河北省高等学校科学技术研究项目 ZD9201470919

详细信息
    作者简介:

    刘玉芝  女, 博士, 副教授; 主要研究方向:故障诊断与监测技术、信号系统监测与自动控制

    张鑫宇  男, 硕士研究生; 主要研究方向:故障诊断与监测技术、电力系统及其自动化

    卞建鹏  男, 博士, 副教授; 主要研究方向:故障诊断与监测技术、电力系统及其自动化

    胡立强  男, 硕士, 讲师; 主要研究方向:故障诊断与监测技术、电力系统及其自动化

    通讯作者:

    刘玉芝, E-mail:lyz1997a@126.com

  • 中图分类号: TP29;TM615

Synchronization optimization method of adaptive frequency-locked loop without DC component interference

Funds: 

National Natural Science Foundation of China 51307112

the Fund for the Science and Technology Program of Higher Education Institutions of Hebei Province, China ZD9201470919

More Information
  • 摘要:

    电网同步是提高并网换流器故障穿越能力的关键技术之一。为实现电网不平衡下换流器快速准确的并网跟踪,提出一种改进的一阶广义积分器锁频环(FOGI-FLL)方法。建立并网换流器数学模型,分析了不平衡电网下的正负序分离原理,并给出了正负序基频分量分离简化结构,讨论了简化结构中一阶广义积分器核心模块的实现方法,在一阶广义积分器滤波结构上进行了改进,增加了可以消除直流分量干扰的积分补偿环节。仿真结果表明,本文所提方法在电网电压不平衡环境中可以实现高性能的同步跟踪效果。

     

  • 图 1  PWM调制的光伏逆变器并网主电路[10]

    Figure 1.  Main circuit of grid-connected photovoltaic inverter based on PWM modulation[10]

    图 2  正负序基频分量分离结构

    Figure 2.  Separation structure of fundamental positive and negative sequence components

    图 3  正负极性FOGI滤波结构实现

    Figure 3.  Structure of positive and negative pole FOGI filter

    图 4  FOGI分离+50 Hz幅频图

    Figure 4.  Amplitude frequency diagram of separating +50 Hz based on FOGI

    图 5  ωc为不同值时的Bode图

    Figure 5.  Bode diagram of varing ωc

    图 6  E(s)和Q(s)的Bode图

    Figure 6.  Bode diagram of E(s) and Q(s)

    图 7  FLL结构

    Figure 7.  Configuration of FLL

    图 8  含直流分量抵偿的FOGI-FLL结构

    Figure 8.  FOGI-FLL structure with free DC component

    图 9  积分补偿环节阶跃响应比较

    Figure 9.  Comparison of step response of integral compensation

    图 10  两相电网电压跌落波形

    Figure 10.  Waveforms of two-phase grid voltage fall

    图 11  正负序电压分量分离波形

    Figure 11.  Separation waveforms of positive and negative sequence voltage component

    图 12  相位检测波形

    Figure 12.  Waveforms of phase detection

    图 13  频率检测波形

    Figure 13.  Waveforms of frequency detection

    图 14  输出的电压、角频率和相位检测波形

    Figure 14.  Waveforms of voltage, angular frequency and phase detection

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出版历程
  • 收稿日期:  2016-08-17
  • 录用日期:  2016-09-09
  • 网络出版日期:  2017-09-20

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