Rectangular Form Optimal Power Flow by Interior - Point

The solution of an optimal power ow (OPF) problem in rectangular form by an interior-point method (IPM) for nonlinear programming is described. When formulated in rectangular form, some OPF variants have quadratic objective and quadratic constraints. Such quadratic features allow for ease of matrix setup and inexpensive incorporation of higher-order information in a predictor-corrector procedure that improves the IPM performance. Besides presenting an OPF in rectangular form, the paper describes the derivation of the IPM from a general nonlinear programming problem, and discusses major issues in implementation to solve the OPF problem. Numerical results are presented.