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不对称电网同步相位的快速开环捕获方法研究

DOI: 10.13334/j.0258-8013.pcsee.2015.22.002, PP. 5682-5691

Keywords: 开环锁相,虚拟正交信号,对称分量法,谐波消除算法

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Abstract:

快速准确地获取电网同步相位是并网逆变器控制的基本要求。然而,当电网发生严重不对称故障时,传统软锁相环(softwarephase-lockedloop,SPLL)方法的动态响应时间较长(大于一个工频周期),因此无法满足高性能逆变器控制对锁相快速性的要求。据此,提出电网同步相位的快速开环捕获方法,可显著提高电网电压不对称条件下的相位同步速度。该方法首先通过构造电网电压的虚拟正交信号并使用对称分量法,实现了电网电压基波正序分量的快速准确提取,接下来通过对该正序分量进行开环锁相,即可快速获得电网电压基波正序分量的实时相位。最后,论文提出一种改进的虚拟正交信号构造方法,有效地提高了构造信号的准确度。各种工况下的实验结果同时表明:提出的开环锁相方法可在电网不对称且畸变的恶劣环境下实现快速准确地捕获电网的实时同步相位,具有较强的鲁棒性。

References

[1]  Rodriguez P,Pou J,Bergas J,et al.Decoupled double synchronous reference frame PLL for power converters control[J].IEEE Transactions on Power Electronics,2007,22(2):584-592.
[2]  杜雄,郭宏达,孙鹏菊,等.基于ANF-PLL的电网电压基波正负序分离方法[J].中国电机工程学报,2013,33(27):28-35. Du Xiong,Guo Hongda,Sun Pengju,et al.A positive and negative sequence component separation method for grid voltage based on the phase locked loop with an adaptive notch filter[J].Proceedings of the CSEE,2013,33(27):28-35(in Chinese).
[3]  Lee K J,Lee J P,Shin D S,et al.A novel grid synchronization PLL method based on adaptive low-pass notch filter for grid-connected PCS[J].IEEE Transactions on Industrial Electronics,2014,61(1):292-300.
[4]  Freijedo F D,Doval-Gandoy J,Lopez O,et al.A generic open-loop algorithm for three-phase grid voltage/current synchronization with particular reference to phase,frequency,and amplitude estimation[J].IEEE Transactions on Power Electronics,2009,24(1):94-107.
[5]  Song H S,Nam K.Instantaneous phase-angle estimation algorithm under unbalanced voltage-sag conditions[C]// Proceedings of IEE Generation, Transmission and Distribution,Seattle,USA:IEEE,2000:409-415.
[6]  Svensson J.Synchronization methods for grid-connected voltage source converters[C]//Proceedings of IEE Generation, Transmission and Distribution.Seattle,USA:IEEE,2001:229-235.
[7]  Filho R M S,Seixas P F,Cortizo P C,et al.Comparison of three single-phase PLL algorithms for UPS applications [J].IEEE Transactions on Industrial Electronics,2008,55(8):2923-2932.
[8]  Luo A,Chen Y D,Shuai Z K,et al.An improved reactive current detection and power control method for single- phase photovoltaic grid-connected DG system[J].IEEE Transactions on Energy Conversion,2013,28(4):823-831.
[9]  Vainio O,Ovaska S J.Noise reduction in zero crossing detection by predictive digital filtering[J].IEEE Transactions on Industrial Electronics,1995,42(1):58-62.
[10]  Yang J,Liu C.A precise calculation of power system frequency[J].IEEE Transactions on Power Delivery,2001,16(3):361-366.
[11]  Wang L,Jiang J R,Hong L,et al.A novel phase-locked loop based on frequency detector and initial phase angle detector[J].IEEE Transactions on Power Electronics,2013,28(10):4538-4549.
[12]  Wang Yifei,Li Yunwei.Grid synchronization PLL based on cascaded delayed signal cancellation[J].IEEE Transactions on Power Electronics,2011,26(7):1987-1997.
[13]  Divan D,Johal H.A new concept for realizing grid power flow control[J].IEEE Transactions on Power Electronics,2007,22(4):2253-2260.
[14]  Johal H,Divan D.Design considerations for series-connected distributed FACTS converters [J].IEEE Transactions on Industrial Applications,2007,43(4):1609-1618.
[15]  刘文华,宋强,滕乐天,等.基于集成门级换向晶闸管与链式逆变器的±50 Mvar精致同步补偿器统[J].中国电机工程学报,2008,28(15):55-60. Liu Wenhua,Song Qiang,Teng Letian,et al.±50 Mvar STATCOM based on chain circuit converter employing IGCT’s[J].Proceedings of the CSEE,2008,28(15):55-60(in Chinese).
[16]  袁志昌,宋强,刘文华.改善动态相位跟踪和不平衡电压检测性能的改进软锁相环算法[J].电网技术,2010,34(1):31-35. Yuan Zhichang,Song Qiang,Liu Wenhua.A modified soft phase lock loop algorithm improving the performance in dynamic phase tracking and detection of unbalanced voltage[J].Power System Technology,2010,34(1):31-35(in Chinese).
[17]  熊连松,刘小康,卓放,等.光伏发电系统的小信号建模及其控制器参数的全局优化设计方法[J].电网技术,2014,38(5):1234-1241. Xiong Liansong,Liu Xiaokang,Zhuo Fang,et al.Small-signal modeling of photovoltaic power generation system and global optimal design for its controller parameters[J].Power System Technology,2014,38(5):1234-1241(in Chinese).
[18]  张兴,张崇巍.PWM 整流器及其控制[M].北京:机械工业出版社,2012. Zhang Xing,Zhang Chongwei.PWM rectifier and its control[M].Beijing:China Machine Press,2012(in Chinese).
[19]  王宝诚,伞国成,郭小强,等.分布式发电系统电网同步锁相技术[J].中国电机工程学报,2013,33(1):50-55. Wang Baocheng,San Guocheng,Guo Xiaoqiang,et al.Grid synchronization and PLL for distributed power generation systems[J].Proceedings of the CSEE,2013,33(1):50-55(in Chinese).
[20]  Kaura V,Blasko V.Operation of phase loop system under distorted utility conditions[J].IEEE Transactions on Industrial Application,1997,33(1):58-63.
[21]  Lee S J,Kang S J,Sul S J.A new phase detecting method for power conversion systems considering distorted conditions in power system[C]//Proceedings of IEEE 34th IAS Annual Meeting.Washington D C,USA:IEEE,1999:2167-2172.

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