Abstract：This paper first proposes a control strategy for dynamic voltage regulator (DVR)direct load current control strategy. Through directly and properly controlling the load current of the series transformer, the goal of dynamic compensation for load voltage could be realized indirectly. With the τ-type transformer equivalent circuit, precise DVR system control model is derived. In order to improve the steady and dynamic compensation performance, a compound controller incorporating the state feedback pole assignment and repetitive control is adopted towards the LCL type filter; meanwhile, taking the effects of excitation current into account, transformer excitation current is added to the current control instruction for further enhancing the load voltage compensation accuracy. Simulation and experiment results proved that the control strategy in this paper could realize favorable load voltage compensation performance when network voltage fluctuates or sudden load changes.
黄朝霞, 邹旭东, 童力, 康勇, 黄清军. 基于极点配置和重复控制的电流型单相动态电压调节器[J]. 电工技术学报, 2012, 27(6): 252-260.
Huang Zhaoxia, Zou Xudong, Tong Li, Kang Yong, Huang Qingjun. Research on Current Control Mode Single-Phase Dynamic Voltage Regulator Based on Pole-Assignment and Repetitive Control. Transactions of China Electrotechnical Society, 2012, 27(6): 252-260.
[1] Oliva Aljandro R, Balda Juan Carlos. A PV dispersed generator: a power quality analysis within the IEEE 519[J]. IEEE Transactions on Power Delivery, 2003, 18(2): 525-530． [2] Papathanassiou Stavros A, Santjer Fritz. Power- quality measurements in an autonomous island grid with high wind penetration[J]. IEEE Transactions on Power Delivery, 2006, 21(1): 218-224. [3] Ghosh A, Ledwich G. Compensation of distribution system voltage using DVR[J]. IEEE Transactions on Power Delivery, 2002, 17(4): 1030-1036. [4] 王智勇, 吴正国, 周卫平, 等. 基于基波特征量提取的DVR参考电压波形生成算法[J]. 电工技术学报, 2009, 24(4): 168-174. Wang Zhiyong, Wu Zhengguo, Zhou Weiping, et al. A novel reference wave generation algorithm based on charateristic vector extracted for DVR[J]. Transactions of China Electrotechnical Society, 2009, 24(4): 168-174. [5] Choi S S, Li B H, Vilathgamuwa D M. Dynamic voltage restoration with minimum energy injection[J]. IEEE Transactions on Industry Applications, 2000, 15(1): 51-57. [6] 杨潮, 韩英铎, 黄瀚, 等. 动态电压调节器串联补偿电压研究[J] . 电力自动化设备, 2001, 21(5): 1-5. Yang Chao, Han Yingduo, Huang Han, et al. Study on series compensating voltage in DVR[J]. Electric Power Automation Equipment, 2001, 21(5): 1-5. [7] Takushi Jimihi, Hideai Fujita, Hirofumi Akagi. Design and experimentation of a dynamic voltage restorer capable of significantly reducing an energy-storage element[J]. IEEE Transactions on Industry Applications, 2008, 44(3): 817-825. [8] 谢旭, 胡明亮, 梁旭, 等. 动态电压恢复器的补偿特性与控制目标[J]. 电力系统自动化, 2002, 26(8): 41-44. Xie Xu, Hu Mingliang, Liang Xu, et al. Compensation range and control object of dynamic voltage restorer[J]. Automation of Electric Power Systems, 2002, 26(8): 41-44. [9] 朱鹏程, 李勋, 康勇, 等. 统一电能质量控制器控制策略研究[J]. 中国电机工程学报, 2004, 24(8): 67-73. Zhu Pengcheng, Li Xun, Kang Yong, et al. Study of control strategy for a unified power quality conditioner[J]. Proceedings of the CSEE, 2004, 24(8): 67-73. [10] Vinod Khadkikar, Ambrish Chandra. A new control philosophy for a unified power quality conditioner (UPQC) to coordinate load-reactive power demand between shunt and series inverters[J]. IEEE Transactions on Power Delievery, 2008, 23(4): 2522- 2534. [11] 唐欣, 曾启明, 陈伟乐. 有源电力滤波器的双闭环串级控制[J]. 中国电机工程学报, 2008, 28(24): 59-63. Tang Xin, Zeng Qiming, Chen Weile. Double closed-loop cascade control for active power filter[J]. Proceedings of the CSEE, 2008, 28(24): 59-63. [12] 刘飞, 邹云屏, 李辉. 基于重复控制的电压源型逆变器输出电流波形控制方法[J]. 中国电机工程学报, 2005, 25(19): 58-63. Liu Fei, Zou Yunping, Li Hui. The repetitive control algorithm based current waveform correction for voltage source inverters[J]. Proceedings of the CSEE, 2005, 25(19): 58-63. [13] 刘飞, 査小明, 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. [14] 张允, 邹云屏, 吴振兴, 等. 励磁电流补偿方法的电流控制型单相动态电压恢复器的仿真研究[J]. 中国电机工程学报, 2008, 28(22): 151-158. Zhang Yun, Zou Yunping, Wu Zhenxing, et al. Simulation research of single phase dynamic voltage restorer based on magnetizing current compensation and current control[J]. Proceedings of the CSEE, 2008, 28(22): 151-158. [15] 童力, 邹旭东, 张允, 等. 基于自适应滤波的单相统一电能质量控制器研究[J]. 中国电机工程学报, 2011, 31(24): 9-19. Tong Li, Zou Xudong, Zhang Yun, et al. Research of single-phase united power quality conditioner based on adaptive filter[J]. Proceedings of the CSEE, 2011, 31(24): 9-19. [16] 何娜, 黄丽娜, 武建, 等. 一种新型快速自适应谐波检测算法[J]. 中国电机工程学报, 2008, 28(22): 124-129. He na, Huang lina, Wu jian, et al. A novel harmonic detecting algorithm[J]. Proceedings of the CSEE, 2008, 28(22): 124-129. [17] 王成智, 邹旭东, 许赟, 等. 采用改进重复控制的大功率电力电子负载[J]. 中国电机工程学报, 2009, 29(12): 1-9. Wang Chengzhi, Zou Xudong, Xu Yun, et al. Improved repetitive control scheme for power electronic load[J]. Proceedings of the CSEE, 2009, 29(12): 1-9. [18] Zhang Kai, Kang Yong, Xiong Jian, et al. Direct repetitive control of SPWM inverter for UPS [J]. IEEE Transactions on Power Electronics, 2003, 18(3): 784-792．
2012, Vol. 27 
