OPTIMAL ACTIVE AND REACTIVE POWER DISPATCH

Abstract

In this thesis work, an attempt has been made for optimal real and reactive power dispatch for the economic operation of power systems using P-Q decomposition method. In this method the problem is decomposed into a P-optimization module and a Q-optimization module. Both modules use the same generation cost objective function. The control variables are generator real-power outputs for real-power module and generator reactive-power outputs, shunt capacitors/ reactors, and transformer tap settings for the reactive power module. The constraints are the operating limits of the control variables, bus voltages and power line flows. The optimization problem is solved using the Gradient Projection Method (GPM). The GPM allows the use of functional constraints without the need of penalty functions or Lagrangian multipliers