Optimal Allocation of Series FACTS Devices in Large Scale Systems

摘要

Series FACTS devices, such as the variable series reactor (VSR), have theability to continuously regulate the transmission line reactance so as tocontrol power flow. This paper presents a new approach to optimally locatingsuch devices in the transmission network considering multiple operating statesand contingencies. To investigate optimal investment, a single target yearplanning with three different load patterns is considered. The transmissioncontingencies may occur under any of the three load conditions and the couplingconstraints between base case and contingencies are included. A reformulationtechnique transforms the original mixed integer nonlinear programming (MINLP)model into mixed integer linear programing (MILP) model. To further relieve thecomputational burden and enable the planning model to be directly applied topractical large scale systems, a two phase decomposition algorithm isintroduced. Detailed numerical simulation results on IEEE 118-bus system andthe Polish 2383-bus system illustrate the efficient performance of the proposedalgorithm.