A novel strategy for controlling a group of distributed static series compensators

This paper presents a new control strategy for controlling a group of distributed static series compensators (DSSCs) that can be clamped onto an existing power line and have the ability to change the series impedance of the line in order to control the flow of power. A harmonic analysis of an electromagnetic model of the DSSC is also presented in PSCAD/EMTDC to investigate the amount of harmonic injection of each model and based on the results different control strategies are applied to a group of DSSCs distributed along a transmission line. The effect of each control strategy on active power flow, THD injection and group response time is compared by simulations carried out in PSCAD/EMTDC and the most suitable control scheme for operating a group of DSSCs distributed along a transmission system is presented both for capacitive and inductive compensating modes.