Abstract：Second order generalized integrator (SOGI) can extract the fundamental positive sequence component from three-phase grid voltage signals and obtain the accurate input signal phase by phase-locked loops (PLL). The traditional SOGI has a strong dependence on the input signal frequency, so three improved SOGIs are proposed in the paper. This paper mainly focuses on the detailed comparative analysis of the three improved SOGIs and applies them to PLL. The comparative experiments of three improved SOGI-PLLs are implemented under the conditions of grid voltage imbalance, containing DC components or containing higher harmonics. It can be proved that the improved Ⅲ-type SOGI-PLL has better adaptability to the grid. The correctness and feasibility of the theoretical analysis are verified by the experimental results.
张纯江, 赵晓君, 郭忠南, 于安博. 二阶广义积分器的三种改进结构及其锁相环应用对比分析[J]. 电工技术学报, 2017, 32(22): 42-49.
Zhang Chunjiang, Zhao Xiaojun, Guo Zhongnan, Yu Anbo. Three Improved Second Order Generalized Integrators and the Comparative Analysis in Phase Locked Loop Application. Transactions of China Electrotechnical Society, 2017, 32(22): 42-49.
[1] 赵新, 金新民, 杨捷, 等. 并网逆变器新型不平衡控制方案[J]. 电工技术学报, 2014, 29(1): 257-265. Zhao Xin, Jin Xinmin, Yang Jie, et al. Novel unbalanced control scheme of grid-connected inverter[J]. Transactions of China Electrotechnical Society, 2014, 29(1): 257-265. [2] 宣文华, 牛益国, 谢小英, 等. 基于频域分析和低通滤波的光伏并网逆变器谐振抑制研究[J]. 燕山大学学报, 2015, 39(4): 347-351. Xuan Wenhua, Niu Yiguo, Xie Xiaoying, et al. Suppression of harmonic resonance for grid- connected PV inverter based on frequency domain analysis and low-pass filter control[J]. Journal of Yanshan University, 2015, 39(4): 347-351. [3] Liao Hui, Chen Yanfeng. A novel phase-locked loop for three-phase ups under distorted utility conditions[C]// Electric Information and Control Engineering (ICEICE), Wuhan, China, 2011: 1076-1080. [4] Masoud Karimi-Ghartemani. A unifying approach to single-phase synchronous reference frame PLLs[J]. IEEE Transactions on Power Electronics, 2013, 28(10): 4550-4556. [5] Hwang Seon-Hwan, Liu Liming, Li Hui, et al. DC offset error compensation for synchronous reference frame PLL in single-phase grid-connected converters[J]. IEEE Transactions on Power Electronics, 2012, 27(8): 3467-3471. [6] 熊凌飞, 韩民晓, 姚蜀军. 锁相环对多端柔性直流稳定性作用分析及参数选择研究[J]. 电工技术学报, 2015, 30(16): 203-212. Xiong Lingfei, Han Minxiao, Yao Shujun. Influence of PLL on the stability analysis of VSC-MTDC and parameter selection[J]. Transactions of China Elec- trotechnical Society, 2015, 30(16): 203-212. [7] 杜雄, 刘延东, 王国宁, 等. 采用正弦幅值积分器的单同步参考坐标系同步信号检测方法[J]. 电工技术学报, 2015, 30(4): 167-175. Du Xiong, Liu Yandong, Wang Guoning, et al. Synchronization signal detection method in synchronous reference frame through sinusoidal amplitude integrators[J]. Transactions of China Electrotechnical Society, 2015, 30(4): 167-175. [8] Rodríguez 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. [9] Sun Bo, Dai Ningyi, Chio U F, et al. FPGA-based decoupled double synchronous reference Frame PLL for active power filters[C]//IEEE Conference on Industrial Electronics and Applications (ICIEA), Beijing, China, 2011: 2145-2150. [10] 吴恒, 杨东升, 阮新波. 基于串联信号延迟对消法的三相非理想电网锁相控制策略[J]. 电工技术学报, 2014, 29(8): 255-264. Wu Heng, Yang Dongsheng, Ruan Xinbo. Phase- locked loop based on cascaded delayed signal cancellation for sistorted grid[J]. Transactions of China Electrotechnical Society, 2014, 29(8): 255- 264. [11] 王国宁, 孙鹏菊, 杜雄, 等. 电网电压不对称时锁频环同步信号检测方法的动态性能[J]. 电工技术学报, 2015, 30(22): 163-171. Wang Guoning, Sun Pengju, Du Xiong, et al. Dynamical performance of frequency-locked loop synchronization method under asymmetric grid voltage condition[J]. Transactions of China Electro- technical Society, 2015, 30(22): 163-171. [12] 胡应占, 郭素娜. 适用于电网不平衡时的广义积分器锁相环设计[J]. 电力系统保护与控制, 2014, 42(11): 148-154. Hu Yingzhan, Guo Suna. Design of generalized integrator phase locked loop for unbalanced grid[J]. Power System Protection and Control, 2014, 42(11): 148-154. [13] 刘述奎, 韩莹, 李奇, 等. 基于双二阶广义积分锁相环的燃料电池并网系统研究[J]. 电力系统保护与控制, 2014, 42(5): 122-128. Liu Shukui, Han Ying, Li Qi, et al. Fuel cell grid- connected system based on dual second order generalized integrator phase locked loop[J]. Power System Protection and Control, 2014, 42(5): 122-128. [14] 孔飞飞, 袁铁江, 晁勤, 等. 基于二阶广义积分的变流器电网同步法[J]. 电力系统保护与控制, 2012, 40(12): 116-120. Kong Feifei, Yuan Tiejiang, Chao Qin, et al. A method of converter power grid synchronization based on second-order generalized integral[J]. Power System Protection and Control, 2012, 40(12): 116- 120. [15] Rodríguez P, Teodorescu R, Candela I, et al. New positive-sequence voltage detector for grid synchro- nization of power converters under faulty grid conditions[C]//Power Electronics Specialists Con- ference, Jeju, South Korea, 2006: 1-7. [16] Reza M S, Ciobotaru M, Agelidis V G. Tracking of time-varying grid voltage using DFT based second order generalized integrator technique[C]//IEEE Inter- national Conference on Power System Technology (POWERCON), Auckland, New Zealand, 2012: 1-6. [17] Chung Se-Kyo. A phase tracking system for three phase utility[J]. IEEE Transactions on Power Elec- tronics, 2000, 15(30): 431-438.
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