Operational Principle and Control of the Nine-Switch Converter for Unified Power Quality Conditioner
Guo Jia1, Duan Jiandong1, Sun Li1, Wang Zhigang2
1. Electromagnetic Drive and Control Research Institute Harbin Institute of Technology Harbin 150001 China; 2. CNPC JICHAI Power Equipment Company Jinan 250306 China
Abstract：For dealing with the shortcomings of the unified power quality conditioner including considerable amount of power electronic devices and its complex structure, the paper proposes to replace the back-to-back double PWM converter with the nine-switch converter as the main circuit topology. Nine-switch converter has some advantages such as less switching devices, lower cost, smaller volume and etc. Firstly, the paper introduces the principle and modulation strategy of the nine-switch converter. Secondly, it analyzes steady-state circuit in the case of the voltage sag compensation and reveals the relationship between terminal voltage of the voltage and current compensation ports. According to the above analysis results, the occupancy ratio of the DC voltage can be dynamically allocated between the two output ports to effectively reduce the DC voltage requirement of the system. Then it gives a brief description of the control algorithms of the proposed topology. Finally, the paper verifies the feasibility of the proposed alternatives through simulation and experiment.
郭伽, 段建东, 孙力, 王志刚. 基于九开关变换器的统一电能质量调节器原理与控制[J]. 电工技术学报, 2015, 30(增刊2): 128-134.
Guo Jia, Duan Jiandong, Sun Li, Wang Zhigang. Operational Principle and Control of the Nine-Switch Converter for Unified Power Quality Conditioner. Transactions of China Electrotechnical Society, 2015, 30(增刊2): 128-134.
[1] Kominami T, Fujimoto Y. A novel nine-switch inverter for independent control of two-three-phase loads[C]//42nd IAS Annual Meeting, New Orleans, LA, 2007. [2] Liu Congwei, Bin Wu, Zargari, N R, et al. A novel three-phase three-leg AC/AC converter using nine IGBTs[J]. IEEE Transaction on Power Electroncs, 2009, 24(5): 1151-1160. [3] 田昊, 高峰, 李楠. 九开关变换器无死区调制策略[J]. 电工技术学报, 2013, 28(12): 215-221. Tian Hao, Gao Feng, Li Nan. Deal-time elimination method of nine-switch converters[J]. Transactions of China Electrotechnical Society, 2013, 28(12): 215- 221. [4] 李楠, 高峰, 田昊, 等. 九开关变换器脉宽调制策略[J]. 电力系统自动化, 2014, 38(3): 83-88. Li Nan, Gao Feng, Tian Hao, et al. Pulse width modulation strategy of nine-switch converter[J]. Automation of Electric Power Systems, 2014, 38(3): 83-88. [5] 梁宗泽, 陈宇, 邹旭东, 等. 基于九开关变换器的双馈风电系统运行原理与控制研究[J]. 中国电机工程学报, 2015, 35(5): 1221-1228. Liang Zongze, Chen Yu, Zou Xudong, et al. Research on the operational principle and control of the nine-switch-converter-based doubly-fed wind gener- ation systems[J]. Proceedings of the CSEE, 2015, 35(5): 1221-1228. [6] 周海亮. 统一电能质量调节器检测与补偿控制策略研究[D]. 天津: 天津大学, 2012. [7] 陈众励, 许维胜. 电压中断与电压暂降的成因及其防治[J]. 电工技术学报, 2015, 30(增1): 518-520. Chen Zhongli, Xu Weisheng. Reason and prevention of voltage interruption and voltage sags[J]. Transa- ctions of China Electrotechnical Society, 2015, 30(S1): 518-520. [8] Khadkikar V, Chandra A, Barry A O, et al. Con- ceptual study of unified power quality conditioner (UPQC)[C]//IEEE International Symposium on Indu- strial Electronics, Montreal, Que, 2006, 2: 1088-1093. [9] 沈鑫, 曹敏. 分布式电源并网对于配电网的影响研究[J]. 电工技术学报, 2015, 30(增1): 346-351. Shen Xin, Cao Min. Research on the influence of distributed power grid for distribution networks[J]. Transactions of China Electrotechnical Society, 2015, 30(S1): 346-351. [10] 彭卉, 邹舒, 付永生, 等. 冲击负荷接入电网的电能质量分析与治理方案研究[J]. 电力系统保护与控制, 2014, 42(1): 54-61. Peng Hui, Zou Shu, Fu Yongsheng, et al. Research of the power quality problem and treatment scheme for impact loads connected into Chongqing power system[J]. Power Sytem Protection and Control, 2014, 42(1): 54-61. [11] 杨秋霞, 刘大鹏, 王海臣, 等. 光伏并网发电与电能质量调节统一控制系统[J]. 电力系统保护与控制, 2015, 43(5): 69-74. Yang Qiuxia, Liu Dapeng, Wang Haichen, et al. A combined control approach for grid-connected photovoltaic and power quality regulatory systems[J]. Power System Protection and Control, 2015, 43(5): 69-74. [12] 冯兴田, 孙添添, 马文忠. 配电网电能质量调节装置集散配置策略[J]. 电力系统保护与控制, 2015, 43(24): 33-39. Feng Xingtian, Sun Tiantian, Ma Wenzhong. Centralized and dispersed allocation strategy of power quality regulating devices in distribution network[J]. Power System Protection and Control, 2015, 43(24): 33-39. [13] 王炳昱, 熊炜, 刘冬梅. 基于dq变换的电压暂降检测方法对比分析[J]. 电气技术, 2015, 16(7): 53-57. Wang Bingyu, Xiong Wei, Liu Dongmei. The comparative analysis of voltage sag detection based on dq transform method[J]. Electrical Engineering, 2015, 16(7): 53-57. [14] Liu Congwei, Wu Bin, Zargari N, et al. A novel nine-switch PWM rectifier-inverter topology for three-phase UPS applications[C]//European Confer- ence on Power Electronics and Applications, Aalborg, 2007: 1-10.
2015, Vol. 30 
