基于内模的DSOGI电网电压锁相方法

doi:10.11985/2018.07.001

摘要/Abstract

摘要：

电网电压同步化方法是分布式电源接入微电网的关键技术之一,获取相位角的精度直接影响着网侧变流器的控制性能,尤其是在矢量控制系统中。本文以电网谐波为背景,通过建立电网电压谐波数学模型,分析了锁相误差产生的机理,提出一种基于重复控制内模的双二阶广义积分器（DSOGI）锁相方法。所提出的锁相方法通过在DSOGI中嵌入重复控制内模,在基频和各次谐波频率段产生谐振增益,得出的叠加波形通过50Hz陷波器将谐波分离出来,滤除谐波后的基波信号进行正负序电压分离,可准确锁定基波相位角。最后,通过与几种传统的锁相方法进行仿真对比分析,验证了所提方法的有效性和可行性。

关键词: 锁相环, 谐波, 双二阶广义积分器, 内模

Abstract:

The grid voltage synchronization method is one of the key technologies of distributed power supply microgrid. The accuracy of obtaining phase angle directly affects the control performance of grid side converter, especially in vector control system. Background with power grid harmonic, this paper analyses the phase lock error of the grid voltage harmonic by establishing the mathematical model of the grid voltage harmonics, and proposes an improved second-order integrator phase-locked loop method based on the internal model of repetitive control, the internal model is embedded in the DSOGI-PLL, in the fundamental frequency and the harmonic frequency generate resonant gain, through the 50Hz wave trap, the harmonic component is separated, and the fundamental phase angle can be accurately locked. Finally, the simulation and comparison of several traditional phase-locked methods are carried out to verify the effectiveness and feasibility of the proposed method.

Key words: Phase-locked loop, harmonics, dual second-order generalized integrator, internal model

中图分类号:

TM71

邢作霞,郭立立,王亮,芦彦东. 基于内模的DSOGI电网电压锁相方法[J]. 电气工程学报, 2018, 13(7): 1-7.

Xing Zuoxia,Guo Lil,Wang Liang,Lu Yandong. A DSOGI Phase Lock Loop Method Based on Internal Model for Grid Voltage[J]. Journal of Electrical Engineering, 2018, 13(7): 1-7.

图/表 11

图1

图2

图3

图4

图5

图6

图7

图8

图9

图10

图11

参考文献 16

[1]	文武松, 张颖超, 王璐 , 等. 并网功率变换器的电网电压同步算法[J]. 清华大学学报, 2017,57(6):637-643.
	Wen Wusong, Zhang Yingchao, Wang Lu , et al. Grid voltage synchronization algorithms for grid-connected power converters[J]. Journal of Tsinghua University, 2017,57(6):637-643.
[2]	Pereira H A, Cupertino A F, Ribeiro C A D S G, et al. Influence of PLL in wind parks harmonic emissions[C]. Proceedings of IEEE PES Conference on Innovative Smart Grid Technologies, Latin America. Sao Paulo, 2013: 1-8.
[3]	辛业春, 李国庆, 王尧 , 等. 基于双dq坐标变换的三相电压锁相环的研究[J]. 电力系统保护与控制, 2014,42(10):114-118. doi: 10.7667/j.issn.1674-3415.2014.10.018
	Xin Yechun, Li Guoqing, Wang Yao , et al. Study of three-phase voltage phase locked loop based on double dq transformation[J]. Power System Protection and Control, 2014,42(10):114-118. doi: 10.7667/j.issn.1674-3415.2014.10.018
[4]	Golestan Saeed, Monfared Mohammad, Freijedo Francisco D . Design-oriented study of advanced synchronous reference frame phase-locked loops[J]. IEEE Transactions on Power Electronics, 2013,28(2):765-778. doi: 10.1109/TPEL.2012.2204276
[5]	Rodriguez P, Luna A, Candela I , et al. Multi-resonant frequency-locked loop for grid synchronization of power converter under distorted grid conditions[J]. IEEE Transactions on Industrial Electronics, 2011,58(1):127-138. doi: 10.1109/TIE.2010.2042420
[6]	Rodriguez P, Luna A, Munoz-Aguilar R S, et al. A stationary reference frame grid synchronization system for three-phase grid-connected power converters under adverse grid conditions[J]. IEEE Transactions on Power Electronics, 2012,27(1):99-127. doi: 10.1109/TPEL.2011.2159242
[7]	涂娟, 汤宁平 . 基于改进型DSOGI-PLL的电网电压同步信号检测[J]. 中国电机工程学报, 2016,36(9):2350-2356. doi: 10.13334/j.0258-8013.pcsee.2016.09.005
	Tu Juan, Tang Ningping . Synchronizing signal detection for grid voltage based on modified DSOGI-PLL[J]. Proceedings of the CSEE, 2016,36(9):2350-2356. doi: 10.13334/j.0258-8013.pcsee.2016.09.005
[8]	何宇, 漆汉宏, 邓超 , 等. 一种嵌入重复控制内模的三相锁相环的设计与实现[J]. 电工技术学报, 2016,31(11):83-91.
	He Yu, Qi Hanhong, Deng Chao , et al. A novel three-phase phase-locked loop method based on internal model of repetitive control[J]. Transactions of China Electrotechnical Society, 2016,31(11):83-91.
[9]	杨仁增, 张光先 . 谐波畸变电网下的频率自适应锁相方法[J]. 中国电机工程学报, 2013,33(16):144-152.
	Yang Renzeng, Zhang Guangxian . Frequency adaptive PLL under distorted grid conditions[J]. Proceedings of the CSEE, 2013,33(16):144-152.
[10]	李研达 . 基于双派克变换的新型三相锁相环技术[J]. 沈阳工业大学学报, 2017,39(3):253-257.
	Li Yanda . Novel three phase locked loop technique based on double Park transformation[J]. Journal of Shenyang University of Technology, 2017,39(3):253-257.
[11]	薛尚青, 蔡金锭 . 基于二阶广义积分器的基波正负序分量检测方法[J]. 电力自动化设备, 2011,31(11):69-73.
	Xue Shangqing, Cai Jinding . Detection of fundamental positive and negative sequence components based on second-order generalized integrator[J]. Electric Power Automation Equipment, 2011,31(11):69-73.
[12]	姜一鸣, 姚俊涛, 刘飞 , 等. 考虑电网频率偏差的并网逆变器多内模重复控制[J]. 电力系统保护与控制, 2016,44(21):144-149.
	Jiang Yiming, Yao Juntao, Liu Fei , et al. A multi-internal-model repetitive control for grid-connected inverter considering grid-frequency deviation[J]. Power System Protection and Control, 2016,44(21):144-149.
[13]	卜立之, 李永丽, 孙广宇 , 等. 基于改进型重复控制算法的多功能并网逆变器设计[J]. 电力系统自动化, 2017,41(16):48-55.
	Bu Lizhi, Li Yongli, Sun Guangyu , et al. Corrective security-constrained optimal power flow with control of flexible AC transmission system devices[J]. Automation of Electric Power Systems, 2017,41(16):48-55.
[14]	张文明 . 基于内模原理的单相PWM整流器谐波抑制研究[D]. 成都:西南交通大学, 2016.
[15]	Chen D, Zhang J, Qian Z . Research on fast transient and 6n±1 harmonics suppressing repetitive control scheme for three-phase grid-connected inverters[J]. IET Power Electronics, 2013,6(3):601-610. doi: 10.1049/iet-pel.2012.0348
[16]	Chen D, Zhang J, Qian Z . An improved repetitive control scheme for grid-connected inverter with frequency adaptive capability[J]. IEEE Transactions on Industrial Electronics, 2013,60(2):814-823. doi: 10.1109/TIE.2012.2205364