TY - JOUR
T1 - Input-Output Analysis and Decentralized Optimal Control of Inter-Area Oscillations in Power Systems
AU - Wu, Xiaofan
AU - Dorfler, Florian
AU - Jovanovic, Mihailo
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2016/5
Y1 - 2016/5
N2 - Local and inter-area oscillations in bulk power systems are typically identified using spatial profiles of poorly damped modes, and they are mitigated via carefully tuned decentralized controllers. In this paper, we employ non-modal tools to analyze and control inter-area oscillations. Our input-output analysis examines power spectral density and variance amplification of stochastically forced systems and offers new insights relative to modal approaches. To improve upon the limitations of conventional wide-area control strategies, we also study the problem of signal selection and optimal design of sparse and block-sparse wide-area controllers. In our design, we preserve rotational symmetry of the power system by allowing only relative angle measurements in the distributed controllers. For the IEEE 39 New England model, we examine performance tradeoffs and robustness of different control architectures and show that optimal retuning of fully-decentralized control strategies can effectively guard against local and inter-area oscillations.
AB - Local and inter-area oscillations in bulk power systems are typically identified using spatial profiles of poorly damped modes, and they are mitigated via carefully tuned decentralized controllers. In this paper, we employ non-modal tools to analyze and control inter-area oscillations. Our input-output analysis examines power spectral density and variance amplification of stochastically forced systems and offers new insights relative to modal approaches. To improve upon the limitations of conventional wide-area control strategies, we also study the problem of signal selection and optimal design of sparse and block-sparse wide-area controllers. In our design, we preserve rotational symmetry of the power system by allowing only relative angle measurements in the distributed controllers. For the IEEE 39 New England model, we examine performance tradeoffs and robustness of different control architectures and show that optimal retuning of fully-decentralized control strategies can effectively guard against local and inter-area oscillations.
KW - Input-output analysis
KW - Wide-area control
KW - inter-area oscillations
KW - sparsity-promoting optimal control
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U2 - 10.1109/TPWRS.2015.2451592
DO - 10.1109/TPWRS.2015.2451592
M3 - Article
AN - SCOPUS:84938811541
SN - 0885-8950
VL - 31
SP - 2434
EP - 2444
JO - IEEE Transactions on Power Systems
JF - IEEE Transactions on Power Systems
IS - 3
M1 - 7177132
ER -