Robust Allocation of FACTS Devices for Improved Techno-Economic Operation of Power Systems

A. Alabduljabbar and J.V. Milanović (UK)


FACTS, Genetic Algorithm, Cost Function, TCSC Modelling.


In contemporary power system studies, the optimal allocation and utilization of Flexible AC Transmission System (FACTS) devices are important issues primarily due to their cost. In this study four types of FACTS devices (Static Var compensator (SVC), Thyristor Controlled Series Capacitor (TCSC), Thyristor Controlled Voltage Regulator (TCVR), and Thyristor Controlled Phase Shifting Transformer (TCPST)) are optimally placed in a multi machine power system to reduce the overall costs of power generation. The placement methodology considers simultaneously the cost of generated active and reactive powers and the cost of selected FACTS devices. The Optimal Power Flow (OPF) and Genetic Algorithm (GA) based optimization procedure are employed to solve the allocation task. The Load Duration Curve (LDC) is used to ensure the robustness of the solution. Following the placement of FACTS devices in the system a small disturbance stability study is performed in order to assess the contribution of FACTS devices to system small disturbance stability. The study demonstrated that in addition to the reduction in the overall costs of power generation the allocated FACTS devices contributed to the improvement of damping of electromechanical oscillations.

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