This paper presents a practical algorithm for solving large-scale optimal power flow problems. The proposed algorithm is based on a successive approximation technique in which an original power system can be divided into a main-system and several sub-systems. In the proposed algorithm, approximate voltage characteristics of sub-systems can be derived from the results of OPF for sub-systems, and the OPF for the main-system in conjunction with the derived approximate voltage characteristics of sub-systems can be solved. Finally, the optimal solution of the original power system can be obtained by successively coordinating the approximate voltage characteristics of sub-systems. Since the dimensions of problems to be treated in OPF are reduced, the proposed algorithm can effectively solve large-scale OFF problems. Moreover, the optimal voltage characteristics of sub-systems can be derived. The feasibility and effectiveness of the proposed algorithm are demonstrated on a typical power system model.
[1]
Efthymios Housos,et al.
Real and Reactive Power-System Security Dispatch Using a Variable Weights Optimization Method
,
1983,
IEEE Transactions on Power Apparatus and Systems.
[2]
A. Conejo,et al.
Multi-area coordinated decentralized DC optimal power flow
,
1998
.
[3]
Sarosh Talukdar,et al.
A Fast and Robust Variable Metric Method for Optimum Power Flows
,
1982,
IEEE Transactions on Power Apparatus and Systems.
[4]
Ross Baldick,et al.
Coarse-grained distributed optimal power flow
,
1997
.
[5]
O. Alsac,et al.
Optimal Load Flow with Steady-State Security
,
1974
.
[6]
R. E. Marsten,et al.
A direct nonlinear predictor-corrector primal-dual interior point algorithm for optimal power flows
,
1993
.