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Control loops selection to damp inter-area oscillations of electrical networks

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2 Author(s)
Heniche, A. ; Laval Univ., Que., Canada ; Kamwa, I.

Summary form only given, as follows. This paper reports on results of a study whose objectives Is to demonstrate that a systematic, yet straightforward method based on well-known system theoretical analysis tools can be applied to select the control loops which improve the inter-area dynamic stability while minimizing the Interactions among local and global controllers. Two complementary measures are Involved In the measurement and control signals selection : the geometric measures which allow to choose signal pairs maximizing the controllability and observability of inter-area modes, and the singular-value based total Interaction measure which focuses on minimizing the interactions between the local or global loops at the inter-area natural frequency. As a practical illustration of the proposed measurements and controllers pairing scheme, the linearized model of a nine areas twenty three generators power system involving nine inter-area modes is used. The results obtained show that communication links between areas may deem necessary on one hand to improve the inter-area modes observability-controllability and on the other hand to reduce the interaction between the control loops at the inter-area natural frequencies. The usefulness of such an analysis in minimizing the number of communication links without degrading the overall control system performance is highlighted.

Published in:

Power Engineering Society Summer Meeting, 2002 IEEE  (Volume:1 )

Date of Conference:

25-25 July 2002

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