Sparsity-Promoting Optimal Wide-Area Control of Power Networks

被引:186
作者
Doerfler, Florian [1 ]
Jovanovic, Mihailo R. [2 ]
Chertkov, Michael [3 ,4 ,5 ]
Bullo, Francesco [6 ]
机构
[1] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA
[2] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA
[3] LANL, Div Theory, Los Alamos, NM 87544 USA
[4] LANL, Ctr Nonlinear Studies, Los Alamos, NM 87544 USA
[5] New Mexico Consortium, Los Alamos, NM 87544 USA
[6] Univ Calif Santa Barbara, Dept Mech Engn, Santa Barbara, CA 93106 USA
基金
美国国家科学基金会;
关键词
Alternating direction method of multipliers; inter-area modes; sparsity-promoting control; wide-area control; DAMPING CONTROL; DESIGN; SYSTEM; ROBUST; GENERATION; SELECTION;
D O I
10.1109/TPWRS.2014.2304465
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
080906 [电磁信息功能材料与结构]; 082806 [农业信息与电气工程];
摘要
Inter-area oscillations in bulk power systems are typically poorly controllable by means of local decentralized control. Recent research efforts have been aimed at developing wide-area control strategies that involve communication of remote signals. In conventional wide-area control, the control structure is fixed a priori typically based on modal criteria. In contrast, here we employ the recently-introduced paradigm of sparsity-promoting optimal control to simultaneously identify the optimal control structure and optimize the closed-loop performance. To induce a sparse control architecture, we regularize the standard quadratic performance index with an l(1)-penalty on the feedback matrix. The quadratic objective functions are inspired by the classic slow coherency theory and are aimed at imitating homogeneous networks without inter-area oscillations. We use the New England power grid model to demonstrate that the proposed combination of the sparsity-promoting control design with the slow coherency objectives performs almost as well as the optimal centralized control while only making use of a single wide-area communication link. In addition to this nominal performance, we also demonstrate that our control strategy yields favorable robustness margins and that it can be used to identify a sparse control architecture for control design via alternative means.
引用
收藏
页码:2281 / 2291
页数:11
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