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【24h】 Analysis and Stabilization of a Smart Transformer-Fed Grid

【摘要】The stability of the grid-connected inverters adopted in distributed energy resources (DERs) highly depends on the characteristics of the grid impedance. Hence, various active damping methods and adaptive control algorithms have been proposed for the control of the grid inverters. Differently from those existing solutions, this paper proposes to use a smart transformer (ST) to shape the grid impedance to interact with the controllers of local inverters, aiming at improving the stability of the local controllers as well as the overall grid. A main advantage of this solution is that it offers a pervasive service to all the available DERs, reducing the cost and design effort of the local controllers. Three active damping methods are presented in this paper and the implementation issues in the ST LV-side voltage controller are given. Moreover, the design criteria of the active damping methods considering the control performance of ST and the stability requirements of local DERs are presented. Analysis and experiments are carried out to verify the effectiveness of the proposed solution.

【期刊名称】 Industrial Electronics, IEEE Transactions on

【作者】Zhi-Xiang Zou;Giampaolo Buticchi;Marco Liserre;

【作者单位】;

【收录信息】;

【年(卷),期】2018(65),2

【年度】2018

【页码】1325-1335

【总页数】11

【原文格式】PDF

【正文语种】eng

【中图分类】;

【关键词】Impedance;Inverters;Power system stability;Stability criteria;Voltage control;Feedforward neural networks;

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