Abstract：Current quality is one of the most important requirements of grid-connected converters. Knowing that the hysteresis control is a commonly used method, a basic analysis of the traditional hysteresis control is given first. Then a current prediction and virtual over-sampling based digital hysteresis control algorithm is proposed in this paper for the control of an unsymmetrical multilevel converter. The sampling rate could be lower and the output current quality could be improved compared with the traditional hysteresis control. Simulating comparison of different hysteresis control methods is analyzed, and an experimental prototype is built to validate the proposed algorithm. Simulation and experimental results are given to shown the effectiveness of the proposed algorithm.
刘全伟, 邓焰, 胡义华, 何湘宁. 基于电流预测和虚拟过采样的数字滞环控制[J]. 电工技术学报, 2014, 29(10): 127-133.
Liu Quanwei, Deng Yan, Hu Yihua, He Xiangning. Current Prediction and Virtual Over-Sampling Based Digital Hysteresis Control. Transactions of China Electrotechnical Society, 2014, 29(10): 127-133.
[1] Lasseter R H. Micro grids[C]. IEEE Power Enginee- ring Society Winter Meeting, 2002: 305-308. [2] 王建华, 张方华, 龚春英, 等. 滞环电流控制逆变器建模及分析[J]. 电工技术学报, 2010, 25(6): 63-69. Wang Jianhua, Zhang Fanghua, Gong Chunying, et al. Modeling and analysis of inverter with hysteretic current control[J]. Transactions of China Electrote- chnical Society, 2010, 25(6): 63-69. [3] 顾和荣, 杨子龙, 邬伟扬. 并网逆变器输出电流滞环跟踪控制技术研究[J]. 中国电机工程学报, 2006, 26(9): 108-112. Gu Herong, Yang Zilong, Wu Weiyang. Research on hysteresis-band current tracking control of grid- connected inverter[J]. Proceedings of the CSEE, 2006, 26(9): 108-112. [4] 洪峰, 刘军. 滞环电流控制型双BUCK逆变器[J]. 电工技术学报, 2004, 19(8): 73-77. Hong Feng, Liu Jun. Hysteresis current controled dual buck half bridge inverter[J]. Transactions of China Electrotechnical Society, 2004, 19(8): 73-77. [5] 范小波, 张代润. 光伏并网逆变器数字滞环控制的研究[J]. 电力电子技术, 2006, 40(6): 46-48. Fan Xiaobo, Zhang Dairun. Research on digital hysteresis control for grid-connected PV inverter[J]. Transactions of China Electrotechnical Society, 2006, 40(6): 46-48. [6] Krismadinata, Rahim N A, Selvaraj J. Implementation of hysteresis current control for single-phase grid connected inverter[C]. 7th International Conference on Power Electronics and Drive Systems, 2007: 1097-1101. [7] Maswood A I, Liu Fangrui. A unity-power-factor converter using the synchronous reference frame based hysteresis current control[J]. IEEE Transactions on Industry Applications, 2007, 43(2): 593-599. [8] 魏克新, 纪世忠, 于洋. 三相PWM整流器滞环控制改进方法的研究[J]. 电力电子技术, 2011, 45(9): 114-116. Wei Kexin, Ji Shizhong, Yu Yang. Research on improved hysteresis control strategy of three-phase PWM rectifier[J]. Transactions of China Electrote- chnical Society, 2011, 45(9): 114-116. [9] 刘飞, 查晓明, 周彦, 等. 基于极点配置与重复控制相结合的三相光伏发电系统的并网策略[J]. 电工技术学报, 2008, 23(12): 130-136. Liu Fei, Zha Xiaoming, Zhou Yan, et al. Research on grid-connected strategy combining pole-assignment and repetitive control in three-phase photovoltaic system[J]. Transactions of China Electrotechnical Society, 2008, 23(12): 130-136. [10] Yang Chen, Smedley K M. A cost-effective single- stage inverter with maximum power point tracking[J]. IEEE Transactions on Power Electronics, 2004, 19(5): 1289-1294. [11] Femia N, Granozio D, Petrone G, et al. Optimized one-cycle control in photovoltaic grid connected applications[J]. IEEE Transactions on Aerospace and Electronic Systems, 2006, 42(3): 954-972. [12] 蒋立, 郑建勇. Z源光伏并网直接电流单周控制系统[J]. 电力系统自动化, 2008, 32(22): 87-90. Jiang Li, Zheng Jianyong. A direct current one-cycle control method for Z-source grid-connected photovoltaic system[J]. Automation of Electric Power Systems, 2008, 32(22): 87-90. [13] 周雒维, 龚伟, 苏向丰. 一种改进的单周控制的开关功率放大器[J]. 电工技术学报, 2004, 19(5): 106-110. Zhou Luowei, Gong Wei, Su Xiangfeng. An improved switching power amplifier with one cycle control[J]. Transactions of China Electrotechnical Society, 2004, 19(5): 106-110. [14] 唐欣, 罗安. 基于重复控制的有源滤波器的三态滞环控制方法[J]. 电工技术学报, 2009, 24(9): 134-139. Tang Xin, Luo An. Repetitive control based three- state hysterisis control of a single-phase active filter [J]. Transactions of China Electrotechnical Society, 2009, 24(9): 134-139. [15] Ho C N M, Cheung V S P, Chung H S H. Constant- frequency hysteresis current control of grid-connected VSI without bandwidth control[J]. IEEE Transactions on Power Electronics, 2009, 24(11): 2484-2495. [16] Buso S, Fasolo S, Malesani L, et al. A dead-beat adaptive hysteresis current control[J]. IEEE Transactions on Industry Applications, 2000, 36(4): 1174-1180. [17] Genping Wang, Lingzhi Yi, Xiao Zou, et al. The design of constant frequency hysteresis current controller with voltage space vector in PV grid- connected inverter[C]. Automation Congress 2008, WAC 2008 World, 2008: 1-5. [18] 洪峰, 单任仲, 王慧贞, 等. 一种变环宽准恒频电流滞环控制方法[J]. 电工技术学报, 2009, 24(1): 115-119. Hong Feng, Shan Renzhong, Wang Huizhen, et al. A varied hysteresis-band current controller with fixed switching frequency[J]. Transactions of China Electro- technical Society, 2009, 24(1): 115-119. [19] 胡庆波, 瞿博, 吕征宇. 一种新颖的应用于PFC电路中电流控制的方法[J]. 中国电机工程学报, 2006, 26(3): 64-68. Hu Qingbo, Qu Bo, Lü Zhengyu. A novel method for current control used in PFC converter[J]. Proceedings of the CSEE, 2006, 26(3): 64-68. [20] Stefanutti W, Mattavelli P. Fully digital hysteresis modulation with switching-time prediction[J]. IEEE Transactions on Industry Applications, 2006, 42(3): 763-769.
2014, Vol. 29 
