OPTIMIZATION TECHNIQUE FOR REACTIVE POWER PLANNING OF SUBTRANSMISSION NETWORK UNDER NORMAL OPERATION.

An optimization method is presented for reactive power planning of subtransmission network under normal operating conditions. The planning problem is divided into a master problem and two subproblems. The master problem is to determine yearly investment in reactive power compensation devices for expected load growth over a planning horizon. The subproblems are to determine the optimal operation of power system under normal conditions. The master problem is reduced to a yearly Hamiltonian minimization problem, thereby reducing the dimensionality of optimization algorithm. Two subproblems, P-optimization and Q-optimization, both minimize the fuel requirement using a unified approach. It is noted that the method assumes normal operation.