An efficient method for optimizing dispatch of voltage and reactive power in large scale power systems

This paper presents an efficient method for solving the optimizing dispatch of voltage and reactive power in large scale power systems. In the proposed method, a large system is decomposed into a series of subsystems based on the effective control range of voltage and reactive power regulating devices. A primal problem with high dimension is solved by optimizing alternately a series of subproblems with much low dimension, and the complex coordination process used in other decomposition optimization methods is effectively avoided. The proposed decomposition technique is very well suited for various systems with different size, structure and complexity. Numerical results of applying the proposed method to two power system examples verify the efficiency of the method in terms of convergence and computation time. There are significant improvements compared with the centralization optimization methods in which optimization is directly carried out on the original system model.<>