Investigation of Different Control Stratgies for UPFC Decoupled Model and the Impact of Location on Control Parameters

In order to evaluate the performance of a unified power
flow controller (UPFC), mathematical models for steady state and
dynamic analysis are to be developed. The steady state model is
mainly concerned with the incorporation of the UPFC in load flow
studies. Several load flow models for UPFC have been introduced
in literature, and one of the most reliable models is the decoupled
UPFC model. In spite of UPFC decoupled load flow model simplicity,
it is more robust compared to other UPFC load flow models and it
contains unique capabilities. Some shortcoming such as additional
set of nonlinear equations are to be solved separately after the load
flow solution is obtained. The aim of this study is to investigate the
different control strategies that can be realized in the decoupled load
flow model (individual control and combined control), and the impact
of the location of the UPFC in the network on its control parameters.

• S.A. Alqallaf
• S.A. Al-Mawsawi
• A. Haider

• UPFC
• Decoupled model
• Load flow.

[1] L. Gyugyi, "Unified power-flow control concept for flexible ac
transmission systems,” in IEE Proceedings C (Generation, Transmission
and Distribution), vol. 139, no. 4. IET, 1992, pp. 323–331.
[2] A. Nabavi-Niaki and M. Iravani, "Steady-state and dynamic models of
unified power flow controller (upfc) for power system studies,” Power
Systems, IEEE Transactions on, vol. 11, no. 4, pp. 1937–1943, Nov 1996.
[3] C. Fuerte-Esquivel, E. Acha, and H. Ambriz-Perez, "A comprehensive
newton-raphson upfc model for the quadratic power flow solution of
practical power networks,” Power Systems, IEEE Transactions on, vol. 15,
no. 1, pp. 102–109, Feb 2000.
[4] S.-H. Lee, C.-C. Chu, and D.-H. Chang, "Comprehensive upfc models
for power flow calculations in practical power systems,” in Power
Engineering Society Summer Meeting, 2001, vol. 1. IEEE, 2001, pp.
27–32.
[5] M. Noroozian, L. Angquist, M. Ghandhari, and G. Andersson, "Use of
upfc for optimal power flow control,” Power Delivery, IEEE Transactions
on, vol. 12, no. 4, pp. 1629–1634, 1997.
[6] A. Vural and M. Tumay, "Steady state analysis of unified power flow
controller: mathematical modeling and simulation studies,” in Power Tech
Conference Proceedings, 2003 IEEE Bologna, vol. 4. IEEE, 2003, pp.
6–pp.
[7] M. Z. El-Sadek, A. Ahmed, and H. E. Zidan, "Comparison of unified
power flow controller models for power flow studies,” in Power Systems
Conference, 2006. MEPCON 2006. Eleventh International Middle East,
vol. 1, Dec 2006, pp. 189–196.
[8] N. M. Santos, V. M. Pires, and R. M. Castro, "A new model to incorporate
unified power flow controllers in power flow studies,” in Transmission and
Distribution Conference and Exhibition, 2005/2006 IEEE PES. IEEE,
2006, pp. 133–140.
[9] S. A. Al-Mawsawi and M. Qader, "Comparison of optimal location of
upfc applied to linear and non-linear load model,” in AC and DC Power
Transmission, 2006. ACDC 2006. The 8th IEE International Conference
on. IET, 2006, pp. 204–209.