基于微网主从结构的平滑切换控制策略

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摘要主从结构是微网中常用的一种控制结构。在这种结构中,其中一台为主控逆变器,其余的为从逆变器。并网运行时,主控逆变器需要与电网同步；孤岛运行时,它为从逆变器提供电压参考。本文研究了基于主从控制条件下微网平滑切换控制方法；提出一种适用于微网系统的新型锁相环,可确保微网运行模式的平滑转化,减少切换时的暂态影响,增强了系统的稳定性。文章通过仿真模型和实验样机对文中给出的控制方法的有效性和可行性进行了充分验证。

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	陈新
	姬秋华
	刘飞

关键词 ：微网, 主从控制结构, 锁相环, 运行模式切换

Abstract：Master-Slave configuration is a common structure used in micro-grids. In this configuration, only one inverter is the master, while the others are slaves. In grid-connected mode, the master should be synchronous with the grid, and, in island mode, it serves as a reference to the slave inverters. Based on the master-slave concept, a smooth transformation control method is discussed in this paper. A novel phase-locked loop applied to micro-grids is proposed, which can ensure the smooth transformation of the two modes, and it will reduce the transient effects while switching as well as enhance the stability of the system. Finally, the simulation and experimental results are provided to verify the effectiveness and feasibility of the proposed control strategy.

Key words： Microgrids master-slave configuration phase-locked loop operation mode transition

收稿日期: 2012-09-19 出版日期: 2014-06-18

PACS:	TM464
	TM732

基金资助:江苏省新能源发电与电能变换重点实验室开放研究基金、光宝电力电子技术科研基金和江苏省自然科学基金（BK20131360）资助项目

作者简介: 陈新男,1973年生,博士,副教授,研究方向为新能源发电与微网功率管理与系统控制。姬秋华女,1987年生,硕士,研究方向为DC/AC变换器及微网主控逆变器关键技术研究。

引用本文:

陈新, 姬秋华, 刘飞. 基于微网主从结构的平滑切换控制策略[J]. 电工技术学报, 2014, 29(2): 163-170. Chen Xin, Ji Qiuhua, Liu Fei. Smooth Transferring Control Method of Microgrids Based on Master-Slave Configuration. Transactions of China Electrotechnical Society, 2014, 29(2): 163-170.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I2/163

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