Optimal location and control of TCSC to maximize load expansion

In this paper the problem of determining the location of TCSC to maximize load expansion is analyzed taking into consideration all operation and equipment constraints. Sensitivity parameters for the total system losses are derived as a function of the real power at the individual load points in the presence of TCSC. These sensitivity parameters are used in comparing the alternative locations available for generation capacity and load expansion. A fuzzy logic controller is proposed to control active power flow to maximize load expansion. Results of application of the proposed algorithm to a 20-node network are presented. Results show that, by applying TCSC devices, full flexibility in control of active power flows can be achieved thereby enabling network flexibility and network reinforcement to be compared directly as alternate means of dealing with the costs of thermal constraints.