适用于交直流混合微电网的直流分层控制系统

Abstract
Figure/Table
References
Related Citation (9)

Download: PDF (829 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to enhance the DC side performance of AC-DC hybrid microgrid, a DC hierarchical control system is proposed in this paper. To meet the requirement of DC load sharing between the parallel power interfaces, droop method is adopted. Meanwhile, DC voltage secondary control is employed to restore the deviation in the DC bus voltage. The hierarchical control system is composed of two levels. DC voltage and AC current controllers are achieved in the primary control level. At the same time, droop method for DC side is adopted to reach load sharing. Secondary control level is employed to restore the deviation caused by droop control. Common PI controller with low bandwidth communication is used in the secondary control level, which meets the requirement of the distributed characteristic in the microgrid system. In this paper, the detailed design method for each control level is introduced. Theoretical analysis of the low bandwidth characteristic of secondary control level is also realized. Theoretical results are validated by both simulation and experiment.

Key words： Hybrid microgrid parallel interface converter hierarchical control droop control

Received: 12 January 2012 Published: 25 March 2014

PACS:

TM727

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Lu Xiaonan
	Sun Kai
	Guerrero Josep
	Huang Lipei

Cite this article:

Lu Xiaonan,Sun Kai,Guerrero Josep等. DC Hierarchical Control System for Microgrid Applications[J]. Transactions of China Electrotechnical Society, 2013, 28(4): 35-42.

URL:

http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I4/35

[1] 王飞, 余世杰, 苏建徽, 等. 太阳能光伏并网发电系统的研究[J]. 电工技术学报, 2005, 20(5): 72-74, 91.
[2] 刘其辉, 贺益康, 赵仁德. 交流励磁变速恒频风力发电系统的运行与控制[J]. 电工技术学报, 2008, 23(1): 129-136.
[3] 陈达威, 朱桂萍. 低压微电网中的功率传输特性[J]. 电工技术学报, 2010, 25(7): 117-122, 143.
[4] Chris Marnay, Owen C Bailey.The CERTS microgridand the future of the microgrid[C]. The Association of Computer Electronics and Electrical Engineers Summer Study on Energy Efficiency in Buildings, 2004.
[5] Liu X, Wang P, Loh P C.A hybrid AC/DC microgrid and its coordination control[J]. IEEE Transactions on Smart Grid, 2011, 2(2): 278-286.
[6] 刘增, 刘进军. 一种可实现分布式发电系统平滑切换的三相逆变器控制方法[J]. 电工技术学报, 2011, 26(5): 52-61.
[7] 沈坤, 章兢, 王坚. 基于PQ下垂控制逆变器并联技术的列车辅助供电系统研究[J]. 电工技术学报, 2011, 26(7): 223-229.
[8] Guerrero J M, Hang L, Uceda J.Control of distributed uninterruptible power supply systems[J]. IEEE Transactions on Industry Electronic, 2008, 55(8): 2845-2859.
[9] Martins A P, Carvalho A S, Araújo A S. Design and implementation of a current controller for the parallel operation of standard UPSs[C]. IEEE Annual Conference of the Industrial Electronics Society, 1995: 584-589.
[10] Rajagopalan J, Xing K, Guo Y, et al. Modeling and dynamic analysis of paralleled dc/dc converters with master-slave current sharing control[C]. IEEE Applied Power Electronics Conference, 1996: 678-684.
[11] Wu T F, Chen Y K, Huang Y H. 3C strategy for inverters in parallel operation achieving an equal current distribution[J]. IEEE Transactions on Industry Electronic, 2000, 47(2): 273-281.
[12] Sun X, Lee Y S, Xu D H. Modeling, analysis, and implementation of parallel multi-inverter systems with instantaneous average-current-sharing scheme[J]. IEEE Transactions of Power Electronic, 2003, 18(3): 844-856.