TY - JOUR
T1 - Evaluation of time delay effects to wide area power system stabilizer design
AU - Wu, Hongxia
AU - Tsakalis, Konstantinos
AU - Heydt, Gerald Thomas
N1 - Funding Information:
Manuscript received March 26, 2004. This work was supported in part by EPRI and by the U.S. Department of Defense under the Complex Interactive Networks/Systems Initiative. Paper no. TPWRS-00542-2003. The authors are with Electrical Engineering Department, Arizona State University, Tempe, AZ 85287 USA (e-mail: wu@areva-td.com). Digital Object Identifier 10.1109/TPWRS.2004.836272
PY - 2004/11
Y1 - 2004/11
N2 - Centralized control using system-wide data has been suggested to enhance the dynamic performance of large interconnected power systems. Because of the distance involved in wide-area interconnections, communication delay cannot be ignored. Long time delay may be detrimental to system stability and may degrade system performance. The time delay tolerance of a centralized controller and the associated performance tradeoff is analyzed using a small gain criterion. Special attention is paid to the choice of weighting functions in a robust control design. As expected, it is found that time delay tolerance decreases when the system bandwidth increases, while the nominal system time-domain performance is concomitantly improved. Several approaches which can maintain a good system performance while increasing the time delay tolerance are suggested and compared. A modern controller design technique, like gain scheduling via linear matrix inequalities, is evaluated for the design of the supervisory power system stabilizer accounting for various time delays.
AB - Centralized control using system-wide data has been suggested to enhance the dynamic performance of large interconnected power systems. Because of the distance involved in wide-area interconnections, communication delay cannot be ignored. Long time delay may be detrimental to system stability and may degrade system performance. The time delay tolerance of a centralized controller and the associated performance tradeoff is analyzed using a small gain criterion. Special attention is paid to the choice of weighting functions in a robust control design. As expected, it is found that time delay tolerance decreases when the system bandwidth increases, while the nominal system time-domain performance is concomitantly improved. Several approaches which can maintain a good system performance while increasing the time delay tolerance are suggested and compared. A modern controller design technique, like gain scheduling via linear matrix inequalities, is evaluated for the design of the supervisory power system stabilizer accounting for various time delays.
KW - Gain scheduling
KW - Linear matrix inequality (LMI)
KW - Power system stabilizer (PSS)
KW - Robust control
KW - Small gain theorem
KW - Time delay
KW - Wide-area
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U2 - 10.1109/TPWRS.2004.836272
DO - 10.1109/TPWRS.2004.836272
M3 - Article
AN - SCOPUS:9244231172
SN - 0885-8950
VL - 19
SP - 1935
EP - 1941
JO - IEEE Transactions on Power Systems
JF - IEEE Transactions on Power Systems
IS - 4
ER -