Detecting the phase angle information quickly and accurately is very important in three phase grid connected system and the immunity of the detecting method should be good.This paper proposes a phase locked loop (PLL) method which is different from the traditional synchronous rotating frame PLL (SRF-PLL).This proposed method calculates the phase angle directly by analyzing the corresponding relationship between the ratios of three phase voltages to the sum of three phase voltages′ absolute value and the phase angle.When the three phase voltage is unbalanced or includes harmonics,the positive-sequence component (PSC) of the grid voltage is extracted by the method of double second order generalized integrator (DSOGI),then the phase angle can be detected by the proposed method in this paper with the PSC.Moreover,the proposed method does not need the Park transformation,so it is easy to implement.As a consequence,by comparison with SRF-PLL,the effectiveness and advantage of the proposed method are verified through experiment.
[1] 张志霞,朴在林,郭丹,等.一种应用于电力系统的锁相环[J].电工技术学报,2012,27(2):250-254.
Zhang Zhixia,Piao Zailin,Guo Dan.et al.A kind of phase-locked loop for power system[J].Transactions of China Electrotechnical Society,2012,27(2):250-254.
[2] 裴喜平,郝晓弘,陈伟,等.电网电压不对称故障下软件锁相技术[J].电力自动化设备,2012,32(9):80-84.
Pei Xiping,Hao Xiaohong,Chen Wei,et al.SPLL technique in grid voltage asymmetry fault[J].Electric Power Automation Equipment,2012,32(9):80-84.
[3] 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(22):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(22):83-91.
[4] 刘亚静,范瑜.全数字硬件化正交锁相环建模与分析[J].电工技术学报,2015,30(15):148-155.
Liu Yajing,Fan Yu.Modeling and analysis of all-digital full-hardware quadrature phase-locked loop[J].Transactions of China Electrotechnical Society,2015,30(15):148-155.
[5] 史梦思,钱丽萍,岳云涛,等.三相逆变电源的锁相环设计[J].电工技术学报,2015,30(1):93-97.
Shi Mengsi,Qian Liping,Yue Yuntao,et al.Phase-locked loop designing of three phase inverter power[J].Transactions of China Electrotechnical Society,2015,30(1):93-97.
[6] 杜雄,刘延东,孙鹏菊,等.消除直流分量影响的并网变流器同步参考坐标系锁相环方法[J].电工技术学报,2013,12(12):24-31.
Du Xiong,Liu Yandong,Sun Pengju,et al.SRF-PLL method of grid-tied converter for eliminating the influence of DC components[J].Transactions of China Electrotechnical Society,2013,12(12):24-31.
[7] 张兴,张崇巍.PWM整流器及其控制[M].北京:机械工业出版社,2012.
[8] Hadjidemetriou L,Kyriakides E,Blaabjerg F.A new hybrid PLL for interconnecting renewable energy systems to the grid[J].IEEE Transactions on Industry Applications,2013,49(6):2709-2719.
[9] Liccardo F,Marino P,Raimondo G.Robust and fast three-phase PLL tracking system[J].IEEE Transactions on Industrial Electronics,2011,58(1):221-231.
[10]Freijedo F D,Yepes A G,scar López,et al.Three-phase PLLs with fast postfault retracking and steady-state rejection of voltage unbalance and harmonics by means of lead compensation[J].IEEE Transactions on Power Electronics,2011,26(1):85-97.
[11]Golestan S,Ramezani M,Guerrero J M,et al.dq-frame cascaded delayed signal cancellation-based PLL:Analysis,design,and comparison with moving average filter-based PLL[J].IEEE Transactions on Power Electronics,2015,30(3):1618-1632.
[12]Li Weiwei,Ruan Xinbo,Bao Chenlei,et al.Grid synchronization systems of three-phase grid-connected power converters:a complex-vector-filter perspective[J].IEEE Transactions on Industrial Electronics,2014,61(4):1855-1870.
[13]Busada C A,Jorge S G,Leon A E,et al.Current controller based on reduced order generalized integrators for distributed generation systems[J].IEEE Transactions on Industrial Electronics,2012,59(7):2898-2909.
[14]Rodriíguez P,Luna A,Candela I,et al.Multiresonant frequency-locked loop for grid synchronization of power converters under distorted grid conditions[J].IEEE Transactions on Industrial Electronics,2011,58(1):127-138.
[15]Lee K J,Lee J P,Shin D,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):292-301.
2016, Vol. 31 
