Development of a new power injection model with embedded multi-control functions for static synchronous series compensator

A novel power injection model with multi-control functions of the static synchronous series compensator (SSSC) is presented. In this model, no simplification is performed and the complex impedance of the series coupling transformer and the charging susceptance as well as the complex impedance of the line are all taken into consideration. The proposed model is developed while the original admittance and the Jacobian matrix are kept unchanged. The new Jacobian corresponding to the SSSC device is integrated with the original Jacobian. Furthermore, the proposed model is general since it takes into account any possible bus type at the end of the line where SSSC is installed. In addition, two new control modes of SSSC namely the active and the reactive power losses control are proposed. The model is validated on IEEE 6-bus, IEEE 30-bus and realistic Algerian 114-bus. The simulation results demonstrate the effectiveness of the proposed SSSC model with the newly proposed control functions. It is also observed that the proposed Newton-Raphson power flow algorithm applied to a large and realistic power system is computationally inexpensive and the proposed model has satisfactory performance for steady state analysis and optimisation of the power system with SSSC device.