A Unified Power Flow Controller (UPFC) Based Optimal Power Flow Methodology for Balancing Electric Grid Line-Loading

Flexible AC Transmission Systems (FACTs) devices can be used to relieve congestion in real-time. Reducing congestion often involves reducing the line loading on the heavily loaded lines. For ease of use of FACTs devices for congestion relief in real-time, the Optimal Power Flow(OPF) must be computationally efficient and accurate. Furthermore, the solution should be feasible thus the operational constraints of FACTs devices must be taken into account. The proposed (Linear Programming based Optimal Power Flow)LPOPF formulation in this paper provides a formulation to reduce line loading considering the operational constraints of a Unified Power Flow Controller(UPFC).