适于三相三线光伏并网逆变器的锁相环新方法

电气工程学报 ›› 2015, Vol. 10 ›› Issue (7): 26-32.

适于三相三线光伏并网逆变器的锁相环新方法

张永明¹,岳云涛²,丁宝³,张功³,刘群³

1.同济大学中德工程学院上海 201804
2.北京建筑大学电气与信息工程学院北京 100044
3.哈尔滨工业大学电气工程及自动化学院哈尔滨 150001

收稿日期:2015-03-27 出版日期:2015-07-25 发布日期:2015-07-25
作者简介:Zhang Yongming (张永明) Associate professor, Dr./M.S Supervisor, Current Research Interests: Micro-grid and Energy Conservation in Building|Yue Yuntao (岳云涛) Ass-ociate professor, Post-Doctoral, M.S Supervisor, Current Research Interests: Building Electrical Design and Power Electronics Technology
基金资助:
This work was financially supported by the National Natural Science Foundation of China(NSFC, Grant No.51207035);the Heilongjiang provincial Natural Science Foundation(Grant No.E201430);the Jiangsu provincial Science and Technology Support Program(Grant No.BE2014830)

A New Phase-Locked Loop Approach for Three-Phase Three-Wire Photovoltaic Grid-Connected Inverter Systems

Zhang Yongming¹,Yue Yuntao²,Ding Bao³,Zhang Gong³,Liu Qun³

1.Tongji University Shanghai 201804 China
2.Beijing University of Civil Engineering and Architecture Beijing 100044 China
3.Harbin Institute of Technology Harbin 150001 China

Received:2015-03-27 Online:2015-07-25 Published:2015-07-25

摘要/Abstract

摘要：

针对相位、幅值和频率是光伏并网逆变系统的关键信息,鉴于传统的锁相环方法难以适应低电压穿越的性能要求,本文提出一种新的三相锁相环方法,其主要由三部分组成：①线电压幅值和相位的测量;②正交信号发生器的选择（OSG）;③线电压和相电压之间的转换。研究结果表明,当电网电压发生偏移和跌落时,该三相锁相环的方法可以准确地检测出故障信号。因此,该方法可为光伏并网逆变系统实现低电压穿越提供技术支持。

关键词: 光伏并网, 锁相环, 三相三线制, 二阶广义积分器

Abstract: Phase, amplitude and frequency of the utility voltage are critical information for the operation of the photovoltaic grid-connected inverter systems. Considering that the traditional phase-locked loop (PLL) methods are difficult to adapt the performance requirements of low voltage ride through (LVRT) in three-phase three-wire photovoltaic grid systems, a new three-phase PLL approach was presented in this paper. Three fundamental functional parts make up the proposed method:①measurement of line voltage amplitude and line voltage phase;②choice of orthogonal signal generator (OSG) ;③transformation between line voltage and phase voltage. Research results show that when grid voltage offsets and dips, this three-phase PLL method can detect the fault signal accurately. It provides a technical support for low voltage ride through of the photovoltaic grid-connected inverter systems.

Key words: Photovoltaic grid, phase-locked loop, three-phase three-wire, second order generalized Integrator

张永明,岳云涛,丁宝,张功,刘群. 适于三相三线光伏并网逆变器的锁相环新方法[J]. 电气工程学报, 2015, 10(7): 26-32.

Zhang Yongming,Yue Yuntao,Ding Bao,Zhang Gong,Liu Qun. A New Phase-Locked Loop Approach for Three-Phase Three-Wire Photovoltaic Grid-Connected Inverter Systems[J]. Journal of Electrical Engineering, 2015, 10(7): 26-32.

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