Provide a simple model of the Comprehensive Electric Power Controller

The UPFC in Power Systems controls the line parameters and the power flow of the lines. On the other hand, controlling the power flow and lines parameters in transmission lines, maximizes the capacity of power transmission lines, increases network reliability, reduces line losses, increases power system efficiency, reduces energy loss and consumption management. Therefore, presenting a simple model of UPFC in power systems analysis is of interest to experts. In this paper, a simple model of upfc in steady state is presented. In the proposed model, the converter of upfc series is modeled with circuit elements. The proposed model will be included in the load distribution program without changing the dimensions of the Jacobine network matrix. To demonstrate the efficiency of the proposed model, the standard 14 bus are simulated