Abstract
In order to understand how an energy storage system (ESS) based stabilizer suppresses a power system inter-area oscillation in a multi-machine power system, this paper proposes a tie-line power oscillation related ESS linearized model. Based on the linearized model, a general conclusion is established to explain how and why the ESS based stabilizer to affect the damping of the inter-area power oscillation. And based on the model and the general conclusion, a new method is proposed to design the ESS stabilizer when it is realized by controlling the exchange of either active or reactive power between the ESS and the rest of the power system. The paper presents an example multi-machine power system installed with a battery energy storage system (BESS) based stabilizer. Results of eigensolutions computation and non-linear simulation demonstrate and confirm the effectiveness of the ESS based stabilizer designed by the proposed method in suppressing the inter-area power oscillation. (6 pages)
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