Abstract This paper deals with the optimal power flow problem in a fixed-head hydrothermal electric power system. As the hydro generation is energy limited, a dynamic optimization problem involving the daily scheduling of the system is encountered. This dynamic optimal power flow problem requires a solution of a large scale set of non-linear simultaneous equations. Newton-Raphson's method has been implemented to obtain the optimal operational strategy. Due to the large scale nature of the problem, we have adopted a sparse matrix solution to the problem. Three different formulations involving (1) Polar form (2) Rectangular form and (3) Current mismatch form have been developed. We have developed an algorithm with three different versions. Implementation of these methods is detailed in this paper. The algorithms have been successfully executed for six different IEEE test systems varying in size from 5-bus to 118-bus systems. The test results and CPU times are detailed. A comparative study of the performance...
[1]
G. S. Christensen,et al.
Hydrothermal load flow using functional analysis
,
1973
.
[2]
G. W. Stagg,et al.
Computer methods in power system analysis
,
1968
.
[3]
William F. Tinney,et al.
Optimal Power Flow Solutions
,
1968
.
[4]
M. E. El-Hawary,et al.
The Hydrothermal Optimal Load Flow, A Practical Formulation and Solution Techniques Using Newton's Approach
,
1986,
IEEE Transactions on Power Systems.
[5]
John Peschon,et al.
Optimum Control of Reactive Power Flow
,
1968
.
[6]
M. Ramamoorty,et al.
Load scheduling of hydroelectric/thermal generating systems using nonlinear programming techniques
,
1970
.
[7]
L. L. Freris,et al.
Investigation of the load-flow problem
,
1967
.