分布式电源用四桥臂变换器中点电压漂移控制

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Abstract Four-leg converters are used to supply three-phase balanced voltages under an unbalanced or nonlinear load condition. But if the neutral point of the fourth leg is controlled incorrect, which will make output voltage contain DC component, and cause the output voltage of the four-leg converter asymmetry or the output voltage amplitude change. In order to resolve the problems of DC component caused by the neutral point voltage shift, the new topology structure of the fourth leg which contains the split DC link capacitance and series inductance of neutral line is proposed in this paper, and the mathematical model of the fourth bridge leg is established. Also the voltage and current double closed-loop control strategy is forwarded according to the mathematical model of the fourth bridge leg. At the same time, the controller of the fourth bridge leg is designed, and the steady-state error of the scheme is analyzed too. The control method of the fourth leg proposed in this paper is decoupled from the control of the other three-phase converter, and resolves the problem of DC component caused by the neutral point voltage shift. The feasibility and effectiveness of this control method is verified by PSIM simulation and experimental results.

Key words： Converter four-leg the neutral point voltage shift close-loop control distributed generation

Received: 03 May 2011 Published: 28 November 2013

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TM46

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	Zhang Jiajia
	Shi Dongyuan

Cite this article:

Zhang Jiajia,Shi Dongyuan. Control of Neutral Point Voltage Shift for Four-leg Converter in Distributed Generation[J]. Transactions of China Electrotechnical Society, 2013, 28(2): 225-232.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I2/225

[1] 沈国桥, 徐德鸿. LCL滤波并网逆变器的分裂电容法电流控制[J]. 中国电机工程学报, 2008, 28(18): 36-41.
Shen Guoqiao, Xu Dehong. Current control for grid-connectedinverters by splitting the capacitor of LCL filter[J]. Proceedings of the CSEE, 2008, 28(18): 36-41.
[2] Eric W, Lehn P W. Digital current control of a voltage source converter with active damping of LCL resonance[J]. IEEE Transactions on Power Electronics, 2006, 21(5): 1364-1373.
[3] 徐志英, 许爱国, 谢少军. 采用LCL 滤波器的并网逆变器双闭环入网电流控制技术[J]. 中国电机工程学报, 2009, 29(27): 36-41.
Xu Zhiying, Xu Aiguo, Xie Shaojun. Dual-loop grid current control technique for grid-connected inverter using a LCL filter[J]. Proceedings of the CSEE, 2009, 29(27): 36-41.
[4] 王要强, 吴凤章, 孙力, 等. 阻尼损耗最小化的LCL滤波器参数优化设计[J]. 中国电机工程学报, 2010, 30(27): 90-95.
Wang Yaoqiang, Wu Fengjiang, Sun Li, et al. Optimized design of LCL filter for minimal damping power Loss[J], Proceedings of the CSEE, 2010, 30 (27): 90-95.
[5] 王斯然, 吕征宇. LCL型并网逆变器中重复控制方法研究[J]. 中国电机工程学报, 2010, 30(27): 69-75.
Wang Siran, Lu Zhengyu. Research on repetitive control method applied to grid-connected inverter with LCL filter[J]. Proceedings of the CSEE, 2010, 30 (27): 69-75.
[6] 彭力, 白丹, 康勇, 等. 三相逆变器不平衡抑制研究[J]. 中国电机工程学报, 2004, 24(5): 174-178.
Peng Li, Bai Dan, Kong Yong, et al. Research on three-phase inverter with unbanlanced load[J]. Proceedings of the CSEE, 2004, 24(5): 174-178.
[7] 霍群海, 孔力, 唐西胜. 微源逆变器不平衡非线性混合负载的控制[J]. 中国电机工程学报, 2010, 30(15): 10-15.
Huo Qunhai, Kong Li, Tang Xisheng. Control strategy for unbalanced and nonlinear mixed load of micro-source inverter[J]. Proceedings of the CSEE, 2010, 30 (15): 10-15.
[8] 唐健, 邹旭东, 何英杰, 等. 三相四线制三电平变换器新型三维矢量调制策略[J]. 中国电机工程学报, 2009, 29(36): 9-17.
Tang Jian, Zou Xudong, He Yingjie, et al. Novel 3-D space vector modulation scheme for three-phase four-wire tri-level converter[J]. Proceedings of the CSEE, 2009, 29(36): 9-17.
[9] 唐健, 邹旭东, 佘煦, 等. 三相四线制三电平三桥臂有源滤波器中点平衡控制策略[J]. 中国电机工程学报, 2009, 29(24): 40-48.
Tang Jian, Zou Xudong, She Xu, et al. A research on neutral-point potential balancing control strategy for three-phase four-wire tri-level three-leg APFs[J]. Proceedings of the CSEE, 2009, 29(24): 40-48.
[10] 乐健, 姜齐荣, 韩英铎, 等. 一种新型的四桥臂三电平并联型有源电力滤波器的空间矢量控制策略[J]. 中国电机工程学报, 2006, 26(14): 59-65.
Le Jian, Jiang Qirong, Han Yingduo, et al. A novel space vector control strategy of four-leg three-level shunt active power filter[J]. Proceedings of the CSEE, 2006, 26(14): 59-65.
[11] 黄劲, 熊蕊, 王志, 等. 采用三相四桥臂抑制逆变器共模干扰的SPWM控制策略[J]. 电工技术学报, 2009, 24(3): 74-79.
Huang Jin, Xiong Rui, Wang Zhi, et al. SPWM control strategy to reduce inverter common-mode interferences based on threephase four-leg Structure[J]. Transaction of China Electrotechnical Society, 2009, 24(3): 74-79.
[12] 王慧贞, 丁勇, 张方华, 等. 开关点预置的四桥臂三相逆变器的中线电感[J]. 中国电机工程学报, 2008, 28(9): 23-28.
Wang Huizhen, Ding Yong, Zhang Fanghua, et al. Midline inductor of four-leg three-phase inverter based on switching-node preset[J]. Proceedings of the CSEE, 2008, 28(9): 23-28 .
[13] 王慧贞, 丁勇, 张方华, 等. 开关点预置的四桥臂三相逆变器[J]. 中国电机工程学报, 2008, 28(3): 73-76.
Wang Huizhen, Ding Yong, Zhang Fanghua, et al. Four-leg three-phase inverter based on switching- node preset[J]. Proceedings of the CSEE, 2008, 28(3): 73-76.
[14] 孙驰, 马伟明, 鲁军勇. 三相逆变器输出电压不平衡的产生机理分析及其矫正[J]. 中国电机工程学报, 2006, 26(21): 57-64.
Sun Chi, Ma Weiming, Lu Junyong. Analysis of the unsymmetrical output voltages distortion mechanism of three-phase inverter and its corrections[J]. Proceedings of the CSEE, 2006, 26(21): 57-64.
[15] 林金燕, 王正仕, 陈辉明, 等. 一种高性能三相四桥臂逆变器控制器的设计[J]. 中国电机工程学报, 2007, 27(22): 101-105.
Lin Jinyan, Wang Zhengshi, Chen Huiming, et al. High performance controller design for three-phase four-leg inverters[J]. Proceedings of the CSEE, 2007, 27(22): 101-105.
[16] 王小峰, 邓焰, 何湘宁. 基于混和箝位技术的四桥臂多电平变换器的研究[J]. 中国电机工程学报, 2007, 27(13): 48-52.
Wang Xiaofeng, Deng Yan, He Xiangning. The research on four-bridge multilevel converter based on hybrid-clamped techniques[J]. Proceedings of the CSEE, 2007, 27(13): 48-52.
[17] 刘秀翀, 张化光, 陈宏志. 四桥臂逆变器中第四桥臂的控制策略[J]. 中国电机工程学报, 2007, 27(33): 87-92.
Liu Xiuchong, Zhang Huaguang, Chen Hongzhi. Control strategy of fourth leg in four-leg inverter[J]. Proceedings of the CSEE, 2007, 27(33): 87-92.
[18] 陈宏志, 刘秀翀. 四桥臂三相逆变器的解耦控制[J]. 中国电机工程学报, 2007, 27(19): 74-79.
Chen Hongzhi, Liu Xiuchong. Decoupling control of three-phase four-legged inverter[J]. Proceedings of the CSEE, 2007, 27(19): 74-79.
[19] 孙驰, 鲁军勇, 马伟明. 一种新的三相四桥臂逆变器控制方法[J], 电工技术学报, 2007, 22(2): 57-63, 73.
Sun Chi, Lu Junyong, Ma Weiming. A novel control method for three-phase four-leg inverter[J]. Transaction of China Electrotechnical Society, 2007, 22(2): 57-63, 73.
[20] 张方华, 丁勇, 王慧贞. 四桥臂三相逆变器的特定谐波消除控制[J]. 中国电机工程学报, 2007, 27(7): 82-87.
Zhang Fanghua, Ding Yong, Wang Huizhen, et al. The SHE control strategy on three-phase four-leg inverter[J]. Proceedings of the CSEE, 2007, 27(7): 82-87.