Variable-Structure-Based Nonlinear Control for the Master VSC in DC-Energy-Pool Multiterminal Grids

被引：23

作者：

Davari, Masoud ^{[1
]}

Mohamed, Yasser Abdel-Rady I. ^{[1
]}

机构：

[1] Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB T6G 2V4, Canada

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2014年 / 29卷 / 11期

关键词：

DC-energy pool; nonlinear control; passivity-based control; sigma-delta modulation; variable-structure control; voltage-source converters; PASSIVITY-BASED CONTROL; INVERTER; INTERCONNECTION; MODULATION; CONVERTERS; DESIGN; AC;

D O I：

10.1109/TPEL.2014.2300111

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

DC-energy-pool-based multiterminal grids are gaining widespread acceptance under the super-and smart-grid vision. DC-link voltage control via a master voltage-source converter (VSC) is essential to ensure stable and reliable operation of the overall multiterminal system. In such a demanding application, conventional dc-link voltage controllers, however, suffer from stability and performance issues, mainly attributed to the small-signal-based control design approach and the use of a cascaded control structure based on the power-balance framework which yields unmodeled nonlinear dynamics. To overcome these issues, this paper presents a natural-frame variable-structure-based nonlinear control system for the master VSC applied in dc-energy pool multiterminal grids. The proposed controller accounts for the complete nonlinear dynamics of the master VSC without any cascaded control structure and globally stabilizes the nonlinear dynamics via a passivity-based design approach. Analysis and comparative simulation as well as experimental results are presented to show the effectiveness of the proposed controller.

引用

页码：6196 / 6213

页数：18

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