Improving the Stability of Smart Grids by Using Flexible AlternatingCurrent Transmission Systems (FACTS)

With the increase of using distributed generation sources in electrical networks, it is necessary to convert the traditional electrical networks into smart networks, which is capable supplying the electric energy reliably and safely. Flexible Alternative Current Transmission Systems (FACTS) is a feasible solution, which will be used, to improve the stability and performance of these networks. This article discusses the effect of interconnecting parallel (STATCOM (Static Synchronous Compensator) and series TCSC (Thyristor-Controlled Series Capacitor) FACTs systems in enhancing the stability of new electrical network. Whereas, one of the traditional generators has been replaced by a wind farm based on the double feed induction generator (DFIG). The simulation results show that connecting FACTS controllers improves the stability of the new electrical networks with the presence of a wind farm, and helps to dampen the undesired vibrations of the network parameters electrical (cornering of the rotor-angle and node-voltages). The results showed that the TCSC was more effective than the STATCOM parallel compensator in improving the critical clearing time of the studied network and the node voltages when a balanced three-phase failure occurs. The study was carried out on modified IEEE-14 nodes using the MATLAB software (Power System Analysis Toolbox), which is specialized program in studying electrical networks.