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Co-ordinated control of inter-area oscillations using SMA and LMI

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2 Author(s)
Anamitra Pal ; Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, 24061, USA ; James S. Thorp

Selective Modal Analysis (SMA) has been used in the design of WAMS based damping of inter-area oscillations. In conjunction with a Linear Matrix Inequality (LMI) formulation and a polytopic model a single control law can be found to guarantee pole placement for multiple contingencies. The previous attempts have used a model containing all the ε and ω modes, with SMA used to eliminate all other states. In practical applications the resulting system is still too large to use in a polytopic model. This paper presents an algorithm to further reduce the system size to the relevant modes of oscillations. A 16 machine, 68 bus system is used as the test case with PSSs, DC lines and SVCs acting as the control.

Published in:

2012 IEEE PES Innovative Smart Grid Technologies (ISGT)

Date of Conference:

16-20 Jan. 2012