{"references": ["NERC, Interconnected Operation Services Working Group (IOSWG), Defining Interconnected Operation Services under Open Access, Final Report, March 7, 1997.", "EPRI, \"Solving the Transfer Capability Puzzle (A Newsletter form the Power Delivery Group)\", Sept. 1997.", "R.D. Christie, B.F. Wollenberg and I. Wangstien, \"Transmission management in the deregulated environment\", Proc. of the IEEE, vol. 88, No. 2, Feb. 2000, pp. 170-195.", "G. C. Ejebe, J. Tong, G. G. Waight, J. G. Frame, X. Wang and W. F. Tinney, \"Available Transfer Capability Calculations\", IEEE Trans. on Power Systems, Vol. 13, No. 4, Nov. 1998, pp 1521-1527.", "G. C. Ejebe, J. G. Waight, M. Santos-Nieto and W. F. Tinney, \"Fast calculation of linear available transfer capability\", IEEE Trans. on Power Systems, vol. 15, no. 3, Aug. 2000, pp. 1112-1116.", "S. Greene, I. Dobson, and F.L. Alvarado, \"Sensitivity of transfer capability margin with a fast formula\", IEEE Trans. on Power Systems, vol. 17, no. 1, Feb. 2002.", "S. Grijalva, P.W. Sauer, and J.D. Weber, \"Enhancement of linear ATC calculations by the incorporation of reactive power flows\", IEEE Trans. on Power Systems, vol. 18, no. 2, May 2003, pp. 619-624.", "A. Kumar, S. C. Srivastava, and S. N. Singh, \"Available transfer capability (ATC) determination in competitive electricity market using AC distribution factors\", Electric Power Components and Systems, vol. 32, June 2004, pp. 927-939.", "M.M. Othman, A. Mohamed, and A. Hussain, \"Fast evaluation of available transfer capability using cubic-spline interpolation technique\", Electric Power Systems Research, vol.73, no. 3, March 2005, pp. 335-342.\n[10]\tC-Y Li and C. W. Liu, \"A new algorithm for available transfer capability calculation\", Int. Journal on Electric Power and Energy Systems, vol. 24, 2002, pp. 159-166.\n[11]\tY-Kang Wu, \"A novel algorithm for ATC calculations and applications in deregulated electricity markets\", Electric Power and Energy Systems, vol. 29, 2007, pp. 810-821.\n[12]\tJitendra Kumar and Ashwani Kumar, \"Multi-transactions ATC determination using PTDFs based approach in Deregulated Markets\", in Proc. Annual Power India Conf. (INDICON), 2011, pp. 1-6.\n[13]\tJitendra Kumar and Ashwani Kumar, \"ACPTDF for Multi-transactions and ATC Determination in Deregulated Markets\", International Journal of Electrical and Computer Engineering (IJECE), vol.1, No.1, September 2011, pp. 71-84.\n[14]\tN. D. Ghawghawe and K. L. Thakre, \"Computation of TCSC reactance and suggesting criterion of its location for ATC enhancement\", Int. Journal on Electric Power and Energy Systems, vol. 31, 2009, pp. 86-93.\n[15]\tX-P. Zhang and E. Handschin, \"Transfer Capability Computation of Power Systems with Comprehensive Modeling of FACTS Controller\", in Proc. of 14th PSCC, Spain, 24-28 June 2002.\n[16]\tYing Xiao, Y. H. Song , Chen-Ching Liu, and Y. Z. Sun, \"Available Transfer Capability Enhancement Using FACTS Devices\", IEEE Transactions on Power Systems, vol. no. 18, no. 1, February 2003, pp. 305-312.\n[17]\tH. Sawhney and B. Jeyasurya, \"Application of Unified Power Flow Controller for Available Transfer Capability Enhancement\", Electric Power Systems Research, vol. 69, no. 2-3, May 2004, pp.155-160.\n[18]\tH. Farahmand, Nejad Rashidi and M. Fotuhi-Firoozabad, \"Implementation of FACTS devices for ATC enhancement using RPF technique\", in Proc. of the IEEE, Power Engineering, 2004, pp. 30-35.\n[19]\tD. Menniti, N. Scordino and N. Sorrentino, \"A new method for SSSC optimal location to improve power system Available Transfer Capability\", in Proc. of IEEE, Power Systems Conference and Exposition, 2006, pp. 938-945.\n[20]\tM. Rashidinejad, H. Farahmand, M. Fotuhi-Firuzabad, A.A. Gharaveisi, \"ATC enhancement using TCSC via artificial intelligent techniques \nElectric Power Systems Research, vol. 78, No.1, January 2008, pp.11-20.\n[21]\tAshwani Kumar and Jitendra Kumar, \"Comparison of UPFC and SEN transformer for ATC enhancement in restructured electricity markets\", Int. Journal on Electric Power and Energy Systems, vol. 47, 2013, pp. 295-304. \n[22]\tEnrique Acha, Claudio R. Fuerte-Esquivel, H. Ambize-Perez and C. Angeles- Camacho, \"FACTS: Modeling and Simulation in Power Networks\", John Wiley & Sons, Ltd, ISBN: 0-470-85271-2.\n[23]\t\"MATLAB and GAMS: Interfacing Optimization and Visualization Software\", Michael C. Ferris, August 10, 1999.\n[24]\tIEEE Reliability Test System, A report prepared by the Reliability Test System Task Force of the Applications of Probability Methods Subcommittee, IEEE Trans. on Power Apparatus and Systems, vol. PAS-98, pp. 2047-2054, Nov.- Dec. 1979."]}

In this paper, an optimal power flow based approach has been applied for multi-transactions deregulated environment for ATC determination with SVC and STATCOM. The main contribution of the paper is (i) OPF based approach for evaluation of ATC with multi-transactions, (ii) ATC enhancement with FACTS devices viz. SVC and STATCOM for intact and line contingency cases, (iii) Impact of ZIP load on ATC determination and comparison of ATC obtained with SVC and STATCOM. The results have been determined for intact and line contingency cases taking simultaneous as well as single transaction cases for IEEE 24 bus RTS.