Steady-state modelling of thyristor controlled series compensator for phase domain load flow analysis of electric networks

The goal of this paper is to develop a steady-state mathematical model of the new generation of power electronic-based plant components emerging as a result of the newly developed concept of flexible AC transmission systems (FACTS), namely thyristor controlled series compensator (TCSC). The modelling is carried out in the phase domain considering the TCSC physical structure. A polyphase power flow program based on Newton algorithm is developed in order to implement the proposed model. Analysis of the TCSC performance is carried out in both balanced and unbalanced power network operating conditions. This kind of analysis will allow quantifying the many economical and technical benefits this technology promises, as well as examining the applicability and functional specifications of the controller.