适用于交直流混合微电网的直流分层控制系统

摘要
图/表
参考文献
相关文章 (9)

全文: PDF (829 KB)
输出: BibTeX | EndNote (RIS)

摘要为了改进交直流混合微电网中直流侧的母线电压性能, 本文提出了直流分层控制系统, 以在各接口变换器之间合理分配直流负荷, 同时补偿下垂控制带来的直流母线电压跌落。所介绍的分层控制系统包括两层:第一层控制直流母线电压和交流电流, 同时通过下垂控制实现直流侧的负荷功率分配;第二层补偿下垂控制带来的电压跌落, 进一步提升母线电压质量。在第二层控制中, 采用了具有低带宽通信特点的公共控制器, 满足了微电网分布式结构的需要。本文给出了各控制层的具体设计方法。同时, 对第二层控制的低带宽通信特性进行了具体的理论分析。仿真和实验结果表明了理论分析的正确性。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	陆晓楠
	孙凯
	JosepGuerrero
	黄立培

关键词 ：混合微电网, 并联接口变换器, 分层控制, 下重控制

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

收稿日期: 2012-01-12 出版日期: 2014-03-25

PACS:

TM727

基金资助:国家自然科学基金资助项目(51177083)。

作者简介: 陆晓楠男, 1985年生, 博士研究生, 主要研究方向为微电网系统中电力电子接口变换器控制。孙凯 1977年生, 副教授, 主要研究方向为微电网系统中电力电子接口变换器控制及电机传动。

引用本文:

陆晓楠, 孙凯, JosepGuerrero, 黄立培. 适用于交直流混合微电网的直流分层控制系统[J]. 电工技术学报, 2013, 28(4): 35-42. Lu Xiaonan, Sun Kai, Guerrero Josep, Huang Lipei. DC Hierarchical Control System for Microgrid Applications. Transactions of China Electrotechnical Society, 2013, 28(4): 35-42.

链接本文:

http://dgjsxb.ces-transaction.com/CN/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.