基于改进重复控制的光伏并网逆变器直流注入抑制策略

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (300 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract As the DC injection problem of PV grid-connected inverters causes severe harm to inverters themselves, the grid and the load. To this end, this paper proposes a strategy for restraining DC injection of PV grid-connected inverters based on improved repetitive control by utilizing repetitive control’s characteristic of helping increase compensation accuracy, and compensation methods can be selected according to different protection needs. The traditional repetitive control has the problem of poor dynamic response. Besides, the DC component in the output of PV grid-connected inverters is not a constant. Therefore, this strategy employs carrier cycle as compensation cycle of repetitive control and calculates DC component in the output. The calculated results are employed as feedback to adjust SPWM duty cycle with PI control to achieve the restraint of DC injection of PV grid-connected inverters, which greatly enhances compensation accuracy and dynamic response of DC component. The feasibility and effectiveness of this strategy are verified through experimental results by employing half-wave load, and the control core in the experiment is TMS320F28XXX.

Key words： Grid-connected inverter DC injection DC component repetitive control PI control

Received: 04 June 2013 Published: 25 March 2014

PACS:

TM464

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Chen Kun
	Liu Dichen
	Chen Changwang

Cite this article:

Chen Kun,Liu Dichen,Chen Changwang. A Strategy for Restraining DC Injection of Photovoltaic Grid-Connected Inverters Based on Improved Repetitive Control[J]. Transactions of China Electrotechnical Society, 2013, 28(10): 159-166.

URL:

http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I10/159

[1] 李冬辉, 王鹤雄, 朱晓丹, 等. 光伏并网发电系统几个关键问题的研究[J]. 电力系统保护与控制, 2010, 21(38): 208-214.
Li Donghui, Wang Hexiong, Zhu Xiaodan, et al. Research on several critical problems of photovoltaic grid-connected generation system[J]. Power System Protection and Control, 2010, 21(38): 208-214.
[2] 周林, 曾意, 郭珂, 等. 具有电能质量调节功能的光伏并网系统研究进展[J]. 电力系统保护与控制, 2012, 9(40): 137-145.
Zhou Lin, Zeng Yi, Guo Ke, et al. Development of photovoltaie grid-connected system with power quality regulatory function[J]. Power System Protec- tion and Control, 2012, 9(40): 137-145.
[3] Remus T, Macro L, Pedro R. Grid converter for photovoltaic and wind power systems[M]. 北京: 机械工业出版社, 2012: 34-35.
[4] 孙孝峰, 顾和荣, 王立乔, 等. 高频开关型逆变器及其并联并网技术[M]. 北京: 机械工业出版社, 2011: 225-227.
[5] IEEE Std 1547-2003, Standard for interconnecting distributed resources with electric power systems[S].
[6] IEC 61727-2004, photovoltaic(PV) systems: characteristics of the utility interface[S]. 2 ed.
[7] Vde V 0126-1-1, Document 0126003, VDE Verlag, 2006, Automatic Disconnection Device between a Generator and the Public Low-Voltage Grid[S].
[8] 中华人民共和国国家质量监督检疫检验总局. 中国国家标准化管理委员会. GB/T 19939-2005, 光伏系统并网技术要求[S]. 北京: 中国标准出版社, 2006．
[9] 中华人民共和国国家质量监督检疫检验总局. 中国国家标准化管理委员会. NB/T 32004-2013, 光伏发电并网逆变器技术规范[S]. 北京: 中国标准出版社, 2013(即将出版).
[10] 周林, 杨冰, 郭珂, 等. 光伏并网系统中直流注入问题最新进展及发展趋势[J]. 电力系统保护与控制, 2012, 40(6): 147-155.
Zhou Lin, Yang Bin, Guo Ke, et al. The progress and development trend of the DC injection issue in PV grid-connected systems[J]. Power System Protection and Control, 2012, 40(6): 147-155.
[11] 孙向东, 任碧莹, 钟彦儒, 等. 滤波电感在线估计方法在预测电控制中的应用[J]. 电工技术学报, 2009, 7(24): 150-156.
Sun Xiangdong, Ren Biying, Zhong Yanru, et al. An online estimation method of the filter inductance for a predictive current control[J]. Transactions of China Electrotechnical Society, 2009, 7(24): 150-156.
[12] 王宝诚, 郭小强, 梅强, 等. 无变压器非隔离型光伏并网逆变器直流注入控制技术[J]. 中国电机工程学报, 2009, 29(36): 23-29．
Wang Baocheng, Guo Xiaoqiang, Mei Qiang, et al. DC injection control for transformerless PV grid- connected inverters[J]. Proceedings of the CSEE, 2009, 29(36): 23-29．
[13] 王慧贞, 蔡兆奇, 刘军, 等. 三电平双降压式半桥逆变器[J]. 电工技术学报, 2009, 2(24): 73-77.
Wang Huizhen, Cai Zhaoqi, Liu Jun, et al. A novel three level dual buck half bridge inverter[J]. Transactions of China Electrotechnical Society, 2009, 2(24): 73-77.
[14] Gonzalez R, Lopez J, Sanchis P, et al. Transformerless inverter for single-phase photovoltaic Systems[J]. IEEE Transactions on Power Electronics, 2007, 22(2): 693-697.
[15] 中华人民共和国国家质量监督检疫检验总局. 中国国家标准化管理委员会. Q/GDW 480-2010, 分布式电源接入电网技术规定[S]. 北京: 中国标准出版社, 2010．
[16] 何国锋, 徐德鸿. 基于解耦控制的多模块逆变器并联系统直流环流抑制策略[J]. 中国电机工程学报, 2012, 32(18): 43-51.
He Guofeng, Xu Dehong. The DC circulation current control strategy based on decoupled control scheme in the multi-module paralleled inverter system[J]. Proceedings of the CSEE, 2012, 32(18): 43-51.
[17] 张兴, 曹仁贤. 太阳能光伏并网发电及其逆变控制[M]. 北京: 机械工业出版社, 2012: 93-97.
[18] 金灵辉, 吕征宇. 基于DSP的逆变器输出电压直流分量软件调偏法[J]. 电力电子技术, 2011, 45(9): 1-4.
Jin Linghui, Lü Zhengyu. Software regulate DC component in inverter output voltage based on DSP[J]. Power Electronics, 2011, 45(9): 1-4.
[19] 中华人民共和国国家质量监督检疫检验总局, 中国国家标准化管理委员会. GB/T 14549—1993, 电能质量公用电网谐波[S]. 北京: 中国标准出版社, 1994．
[20] 中华人民共和国国家质量监督检疫检验总局, 中国国家标准化管理委员会. GB/T24337—2009, 电能质量公用电网间谐波[S]. 北京: 中国标准出版社, 2010．
[21] 王汝田, 王建赜, 谭光慧, 等. 基于重复控制的新型三相变换器研究[J]. 电力自动化设备, 2008, 28(6): 11-16.
Wang Rutian, Wang Jianze, Tan Guanghui, et al. Study of three-phase converter with repetitive control[J]. Electric Power Automation Equipment, 2008, 28(6): 11-16.
[22] 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, 9(24): 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, 9(24): 134-139.
[23] TMS320x2833x analog-to-digital converter(ADC) module reference guide[R].
[24] TMS320x2833x, 2823x enhanced pulse width modulator(ePWM) module reference guide[R].