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Abstract
Voltage and reactive power control provide the operator of a power system with a set of control variables, to maintain bus voltage magnitudes within their allowable limits, and to minimize the real power losses through the transmission network by rescheduling reactive power flow.
The solution of the optimal reactive power control problem involves the optimization of the nonlinear objective function (i.e. real power losses in the electrical power transmission network-PLoss) while satisfying the nonlinear system performance constraints. Two algorithms have been presented in this thesis; for solving the problem of optimal reactive power (VAR) dispatch.
The first approach, uses the linear programming L.P. technique. It employs a linearized version of the system performance constraints and the objective function -PLoss. This approach is iterative; the L.P. algorithm with load flow solution using Newton-Raphson are run successively until the objective function is minimized.
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