Assessment of available transfer capability for practical power systems with combined economic emission dispatch

Abstract This paper describes the assessment of available transfer capability (ATC) with capacity benefit and transmission reliability margins of practical power systems with combined economic emission dispatch (CEED). ATC is a measure of unutilized capability of transmission system subjected to wheeling transactions without violating transmission constraints at given time and load. In this paper, capacity benefit margin (CBM) is incorporated in the test systems by reserving powers in transmission lines. The transmission reliability margin (TRM) is implemented either by making any one of the transmission lines as out of order or by making a generator out at a time. CEED problem has been formulated as a multi-objective problem by considering both economy and emission simultaniously. This bi-objective CEED problem is converted into single objective function using price penalty factor approach. In the proposed approach, Newton Raphson power flow method and Evolutionary Programming (EP) algorithm have been combined used for ATC calculation considering CBM, TRM and economic emission dispatch respectively. A novel modified price penalty factor is proposed in this paper to solve the CEED problem. A non-linear scaling factor is also included in EP algorithm to improve the convergence performance. Assessment of ATC in combined economic emission environment has been tested both on IEEE-30 and Indian utility-62 bus systems with line flow constraints. Simultaneous bilateral and multilateral wheeling transactions have been carried out in the test systems for the assessment of ATC. The solutions obtained are quite encouraging and useful in the present deregulated environment.

[1]  Kit Po Wong,et al.  Evolutionary programming based optimal power flow algorithm , 1999 .

[2]  Loi Lei Lai,et al.  Application of evolutionary programming to reactive power planning-comparison with nonlinear programming approach , 1997 .

[3]  R. D. Tabors,et al.  Lessons from the UK and Norway , 1996 .

[4]  Jiann-Fuh Chen,et al.  Multiobjective power dispatch with line flow constraints using the fast Newton-Raphson method , 1997 .

[5]  Kwang Y. Lee,et al.  Optimal reactive power planning using evolutionary algorithms: a comparative study for evolutionary programming, evolutionary strategy, genetic algorithm, and linear programming , 1998 .

[6]  A. David,et al.  Optimal dispatch under transmission contracts , 1999 .

[7]  J. Nanda,et al.  Economic emission load dispatch with line flow constraints using a classical technique , 1994 .

[8]  H. Rudnick.  Planning in a Deregulated Environment in Developing Countries: Bolivia, Chile, and Peru , 1996, IEEE Power Engineering Review.

[9]  R. D. Christie,et al.  Load frequency control issues in power system operations after deregulation , 1995 .

[10]  D. P. Kothari,et al.  Combined Economic and Emission Dispatch Using Improved Backpropagation Neural Network , 2000 .

[11]  Hugh Rudnick,et al.  Pioneering electricity reform in South America , 1996 .

[12]  G. Anders,et al.  Available transmission capability-sell firm or interruptible? , 1999 .

[13]  R. Green,et al.  Competition in generation: the economic foundations , 2000, Proceedings of the IEEE.

[14]  G. C. Ejebe,et al.  Fast calculation of linear available transfer capability , 1999 .

[15]  M. R. Gent,et al.  Minimum-Emission Dispatch , 1971 .

[16]  C. Singh,et al.  Assessment of Available Transfer Capability and Margins , 2002, IEEE Power Engineering Review.

[17]  G. A. Hamoud,et al.  Assessment of available transfer capability of transmission systems , 2000 .

[18]  J. Yuryevich,et al.  Evolutionary-programming-based algorithm for environmentally-constrained economic dispatch , 1998 .

[19]  H. Gupta,et al.  Evolutionary programming based algorithm for selection of wheeling options , 2001, 2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194).

[20]  J.W. Williams.  Open Transmission Accesss , 1996, IEEE Power Engineering Review.

[21]  Narayana Prasad Padhy,et al.  Comparison and application of evolutionary programming techniques to combined economic emission dispatch with line flow constraints , 2003 .

[22]  G. C. Ejebe,et al.  Available transfer capability calculations , 1998 .

[23]  J. Nanda,et al.  New optimal power-dispatch algorithm using Fletcher's quadratic programming method , 1989 .

[24]  Feng Xia,et al.  A methodology for probabilistic simultaneous transfer capability analysis , 1996 .