Experiences with implementing optimal power flow for reactive scheduling in the Taiwan power system

An OPF (optimal power flow) program based on the Newton methodology has been implemented, as the first step in the development of a VAr (reactive-volt-ampere) planning program for the Taiwan Power Company. The strength of the Newton method was demonstrated by extensive system tests. Of particular importance is the demonstration that binding inequality constraints could be selected and enforced reliably and efficiently. Different levels of functional capabilities regarding infeasible solutions have been identified; and test results showed that they could be satisfied effectively. Detailed test results on the selection and enforcement of binding inequality constraints are presented in an effort to clarify some uncertainties that have persisted in this key aspect of the Newton-OPF methodology.<>