Static reference frame LQR optimal state-feedback control for static-series compensators

This paper presents an optimal LQR control for a static-series compensator (SSC) and propounds a design criterion for the choice of the LQR weights in order to mitigate grid-voltage dips. The authors present a SSC state-space model that considers the modelling of grid, transformer and R-L load. The proposed control works in the Stationary-Reference Frames (SRF) and implements AFC resonant controllers, allowing the direct control of unbalanced dips in a three wire grid-load connection.

[1]  H. Awad.  Vector control of static series compensator for mitigation of voltage dips , 2002 .

[2]  A. Campbell,et al.  Backfilling the sinewave. A dynamic voltage restorer case study , 1999 .

[3]  A. I. Gardiner,et al.  A novel series dynamic voltage restorer for distribution systems , 1998, POWERCON '98. 1998 International Conference on Power System Technology. Proceedings (Cat. No.98EX151).

[4]  Math Bollen,et al.  Understanding Power Quality Problems , 1999 .

[5]  Louis Weinberg,et al.  Network Analysis and Synthesis , 1962 .

[6]  Franklin Fa-Kun Kuo,et al.  Network analysis and synthesis , 1962 .

[7]  John Godsk Nielsen,et al.  Design and Control of a Dynamic Voltage Restorer , 2002 .

[8]  Ian Postlethwaite,et al.  Multivariable Feedback Control: Analysis and Design , 1996 .

[9]  M. D. Stump,et al.  The role of custom power products in enhancing power quality at industrial facilities , 1998, Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137).

[10]  Frede Blaabjerg,et al.  A Robust Control Scheme for Medium-Voltage-Level DVR Implementation , 2007, IEEE Transactions on Industrial Electronics.

[11]  P. Dahler,et al.  Power supply quality improvement with a dynamic voltage restorer (DVR) , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.

[12]  Katsuhiko Ogata,et al.  Discrete-time control systems , 1987 .

[13]  Robert Grino,et al.  Adaptive Feed-Forward Cancellation Control of a Full-Bridge DC-AC Voltage Inverter , 2008 .