ADMM-Based Distributed DC Optimal Power Flow with Power Flow Control

This paper presents a new methodology of incorporating power flow controllers, specifically flexible AC transmission systems (FACTS), into distributed DC optimal power flow (DCOPF). The distributed DCOPF problems are then solved by the alternating direction method of multipliers (ADMM). Efficient modeling of the power flow control capabilities of prominent FACTS devices, such as the unified power flow controller (UPFC) and the static synchronous series compensator (SSSC), enables the seamless integration of FACTS into the ADMM-based distributed DCOPF, thus allowing FACTS operation to be co-optimized with generator dispatch under a distributed control paradigm for the power system. The proposed ADMM-based distributed DCOPF problem with FACTS devices are studied through simulations on a 6-bus system and a modified IEEE 118-bus system to verify its convergence to the optimal generator dispatch.