| Title |
Damping Inter-area Low Frequency Oscillations in Large Power Systems with H_∞ Control of TCSC PARTII: Design of H_∞ Controller |
| Authors |
김용구(Kim, Yong-Gu) ; 전영환(Jeon, Yeong-Hwan) ; 송성근(Song, Seong-Geun) ; 심관식(Sim, Gwan-Sik) ; 남해곤(Nam, Hae-Gon) |
| Keywords |
TCSC ; H_∞ optimization ; robust control design ; low frequency inter-area oscillations ; eigen-sensitivity |
| Abstract |
This paper presents a systematic design procedure of H_∞ controller of TCSC for damping low frequency inter-area oscillations in large power systems. Sensitivities of the inter-area mode for changes in line susceptance are computed using the eigen-sensitivity theory of augmented system matrix and TCSC locations are selected using the line sensitivities. The reduced model required for designing a manageable-size H_∞ controller is obtained using the reduced frequency domain system identification method and the various weighting functions are tuned systematically to provide a robust performance. The proposed H_∞ controller proved to be very effective for damping the inter-area mode of the large KEPCO power system. |