Robustness of an energy storage system-based stabiliser to suppress inter-area oscillations in a multi-machine power system

• Published in: IET generation, transmission & distribution Vol. 6; no. 4; pp. 339 - 351
• Main Authors: DU, W, WANG, H. F, CAO, J, XIAO, L. Y
• Format: Journal Article
• Language: English
• Published: Stevenage Institution of Engineering and Technology 01.04.2012; The Institution of Engineering & Technology
• Subjects: Active control; Applied sciences; Direct energy conversion and energy accumulation; Disturbances. Regulation. Protection; Electric power plants; Electrical engineering. Electrical power engineering; Electrical power engineering; Energy accumulation; Energy storage; Exact sciences and technology; Exchange; Mathematical analysis; Miscellaneous; Oscillations; Power networks and lines; Reactive power; Retarding; Robustness; Reactive power; Battery storage plants; Transmission line; Multimachine power system; Power oscillation; Electrical network; Power system stability; System simulation; Robustness; Energy storage system; Implementation; Energy storage
• ISSN: 1751-8687; 1751-8695
• DOI: 10.1049/iet-gtd.2010.0782

In order to understand how an energy storage system (ESS)-based stabiliser suppresses a power system inter-area oscillation in a multi-machine power system, this study proposes a tie-line power oscillation-related ESS linearised model. Analysis derived from the general conclusion explains how and why the robustness of the ESS stabiliser is different to the variations of the loading conditions of the tie transmission line, when the stabiliser is realised by controlling the exchange of either active or reactive power between the ESS and the rest of the power system. It is analytically concluded that when the stabiliser is implemented via controlling the exchange of active power, the stabiliser is of better robustness. The study presents an example multi-machine power system installed with a battery energy storage system-based stabiliser. Results of eigensolutions computation and non-linear simulation demonstrate and confirm the analytical conclusion about the robustness of the ESS-based stabiliser in suppressing the inter-area power oscillation.