Use of Modal Sensitivity to Operating Conditions for Damping Control in Power Systems

Conference · Tue Jan 04 00:00:00 EST 2011

DOI:https://doi.org/10.1109/HICSS.2011.469· OSTI ID:1059213

Huang, Zhenyu; Zhou, Ning; Tuffner, Francis K; Trudnowski, Daniel J

Small signal stability is an inherent characteristic of dynamic systems such as power systems. Pole positioning through power system stabilizers (PSS) is often used for improving damping in power systems. A well-designed PSS can be very effective in damping oscillations, especially local oscillations. However, designing PSSs for inter-area oscillations has been a very challenging task due to time-varying operating conditions affecting the characteristics of inter-area oscillations. This paper explores the sensitivity relationship between oscillations and operating conditions and employs the relationship to derive recommendations for operator’s actions to adjust operating conditions so as to improve damping. Low damping is usually considered to be a result of heavy power transfer in long distance. Studies in this paper show that this generally holds true while locations have significant impact on damping of oscillations. Therefore it is important to consider locations in deriving recommendations. This paper proposes the concept of relative modal sensitivity and presents the application of relative modal sensitivity to derive recommendations for operator’s action in damping control.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1059213
• Report Number(s): PNNL-SA-73599; 600303000
• Resource Relation: Conference: Proceedings of the 44th Hawaii International Conference on System Sciences (HICSS 2011), January 4-7, 2011, Koloa, Kauai, Hawaii
• Country of Publication: United States
• Language: English