Optimal location of Flexible AC Transmission Systems (FACTS) Controllers in Electrical Power System Applications

The load imposed on the electrical power system is always subjected to change and is being dynamic in nature. Due to the dynamic load of the power system the various parameters which are associated with the system is also dynamic in nature. But the various system parameters such as voltage, current, power, power flows etc are should be maintained within the permissible limit. So, monitoring the system continuously and taking steps to maintain the system parameters in the power system is the essential job of the power engineers. In the process of analysis and assessment of the static and dynamic performance of the power system the flexible AC Transmission Systems (FACTS) controllers play very important role. FACTS devices are power electronics devices which are used to improve the voltage regulation, transmission loss, optimum operation of power system; optimal power flow control etc. There are many FACTS device combinations are being used in the power system as a controller for the purpose of improving the system static and dynamic performance. This paper provide an overview of the different types of FACTS controllers that are being used/applied/located in the different places of the power system to improve the static and dynamic performance of the power system. In addition to the FACTS controllers there are several devices in the FACTS family which are also discussed in brief.