[1]杨仁增 １,张 良 １,李鑫海 ２,等.弱电网条件下的单相频率自适应锁相环[J].机械与电子,2021,(09):12-15.
　YANG Renzeng,ZHANG Liang,LI Xinhai,et al.Frequency Adaptive Single Phase Grid Synchronizationin Weak Grid Condition[J].Machinery & Electronics,2021,(09):12-15.
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弱电网条件下的单相频率自适应锁相环()
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机械与电子[ISSN:1001-2257/CN:52-1052/TH]

卷:
期数:
2021年09期
页码:
12-15
栏目:
设计与研究
出版日期:
2021-09-24

文章信息/Info

Title:
Frequency Adaptive Single Phase Grid Synchronizationin Weak Grid Condition
文章编号:
１００１-２２５７ ( ２０２１ ) ０９-００１２-０４
作者:
杨仁增 １ ; 张 良 １ ; 李鑫海 ２ ; 胡洛铖 ２
１． 贵州理工学院贵州省电力大数据重点实验室,贵州 贵阳 ５５０００３ ;２． 贵州大学电气工程学院,贵州 贵阳 ５５００２５
Author(s):
YANG Renzeng１ ; ZHANG Liang１ ; LI Xinhai２ ; HU Luocheng２
(１．Key Laboratory of Electric Big Data of Guizhou , Guizhou Institute of Technology , Guiyang ５５０００３ , China ;
２．College of Electrical Engineering , Guizhou University , Guiyang ５５００２５ , China )
关键词:
弱电网; 谐波畸变; 频率自适应滤波器; 锁相环
Keywords:
weak grid ;  harmonic distortion ;  frequency adaptive filters ;  phase-locked-loop
分类号:
TM４６４ ; TN９１１.8
文献标志码:
A
摘要:
为消除直流偏置和谐波畸变对基于二阶广义积分器( SOGI )的单相频率自适应滤波器锁相环跟踪精度的影响,提出了一种级联结构的弱电网条件下的单相频率自适应锁相方法.分析了输入直流偏置对SOGI２ 路正交输出信号的影响,以及 SOGI 锁相环的频率跟踪特性.设计级联结构的双二阶广义积分器( DSOGI )锁相环,前级 DSOGI 消除单相电网电压采样信号中的直流偏置,生成 ２ 路正交电压信号,后级DSOGI 分离出 ２ 路正交信号中的基波正序分量,并抑制电网谐波畸变对锁相环相角与频率检测精度的影响.功率硬件在环实验装置上的实物实验验证了所提锁相方法的有效性.
Abstract:
In order to reject the influence of dc offset and harmonic distortion on phase detection precision of the frequency adaptive single-phase synchronization based on second order generalized integrator( SOGI ), a cascaded structure of the frequency adaptive synchronization was proposed．The different effects of dc offset on the two orthogonal output signals of the SOGI are deduced , and the frequency tracking characteristics of the SOGI are analyzed．In design of the frequency adaptive synchronization with cascaded double SOGI ( DSOGI ), the prime DSOGI reject dc offset in the single-phase grid voltage sampling signal ,and generate two orthogonal voltage signals , the second DSOGI separated the fundamental positive sequence component from the two orthogonal signals , and attenuated the low-order harmonics contained in the grid to improve the detection precision of phase angle and frequency of the synchronization．The experiment show that the proposed synchronization algorithm is effective．The effectiveness of the proposed synchronization algorithm is verified by the physical experiment of the power hardware in loop device．

参考文献/References:

[１] 许津铭,卞申一阳,钱强,等 ． 弱电网下基于电网电流前馈的单相逆变器锁相环[ J ] ． 中国电机工程学报,２０２０ , ４０ ( ８ ): ２６４７-２６５７．
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[6] YADA H K , KUMAR A S , PRAKASH K． Improved dual-SOGI control for three-phase unified power quality conditioner under distorted grid and load conditions [ C ]// Tencon２０１７-２０１７IEEE Region１０ Conference , ２０１７ : ２５３６-２５４１．
[７] MATAS J , MARTIN H , HOZ J D L , et al．A family of gradient descent grid frequency estimators for the SOGI filter [ J ] ．IEEE Transactions on power electronics , ２０１８ , ３３ ( ７ ): ５７９６-５８１０．
[８] CIOBOTAR M , TEODORESCU R , AGELIDIS V G．Offset rejection for PLL based synchronization in grid-connected converters [ C ]// ２００８ Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition , ２００８ : １６１１-１６１７．
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相似文献/References:

[1]曹芸凯,赵 涛,陈 静,等.弱电网下并联逆变器谐振模态分析与抑制方法[J].机械与电子,2022,(06):14.
　CAO Yunkai,ZHAO Tao,CHEN Jing,et al.Resonant Mode Analysis and Suppression Method of Parallel Inverters in Weak Grid[J].Machinery & Electronics,2022,(09):14.

备注/Memo

备注/Memo:
收稿日期: ２０２１-０６-０５
基金项目:贵州省科技基金项目(黔科合基础[ ２０１７ ] １０７４ ,黔科合基础[ ２０１８ ] １０６８ )
作者简介:杨仁增 ( １９７１－ ),男,贵州天柱人,博士,副教授,研究方向为电力电子与电力传动.
更新日期/Last Update: 2021-09-28