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This paper presents a wide-area damping controller (WADC) based on networked predictive control (NPC), of which the main purpose is to eliminate the impact of the communication delays of the wide-area signals from the wide-area measurement system (WAMS). The proposed WADC incorporates a generalized predictive control (GPC) to generate the optimized future control sequences and a network delay compensator (NDC) to compensate the communication delays actively. A recursive least-squares algorithm (RLSA) with a variable forgetting factor is used to identify the predictive model in order to overcome the effect of the model inaccuracy of the large-scale power system. Simulation studies undertaken on a two-area four-machine power system show that the proposed WADC can damp the inter-area mode oscillations effectively and compensate the communication delays existing in the wide-area signals in an active way. Moreover, the results obtained in the comparison with the WADC based on GPC are also provided.
Power and Energy Society General Meeting, 2010 IEEE
Date of Conference: 25-29 July 2010