Abstract

In this paper, basic static synchronous series compensator (SSSC) features regarding power flow control in power systems are explained on the basis of mathematical models. Models of SSSC for application in stability and time domain studies applying a digital simulation are presented. A major advantage of models with a decoupled control structure over simplified modelling is that the proposed SSSC models are also numerically stable in the region of reverse power flows and transition from one system operating point to another is fast and smooth. Theoretical considerations as well as newly developed stability mode SSSC models have been tested on test systems. The differences between controllable series compensation (CSC) and SSSC regarding power oscillation damping effectiveness have been demonstrated. These confirmed the theoretical considerations.

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