System parameters improvement of transmission line using Distributed Static Series Compensator (DSSC)

In the countries like India, the task of controlling electrical power system parameters is very difficult as well as it requires high cost to complete the task. These parameters are generally voltage of the all buses, impedance of the transmission line, active as well as reactive power flowing through the line and many others. Highly congested area leads to unstable the system and also it requires to control the said parameters; especially parameters of transmission line. Conventionally, these parameters can be controlled with various methods, i.e. control of network voltage and generator reactive output, coordination of protection/controlling equipments, controlling transformer tap changers, undervoltage load shedding and by using FACTS devices. This article focuses on usage of distributed FACTS devices to improve the transmission system parameters. Deployment of conventional lumped FACTS devices is still minimal because of its high cost and less reliability concerns. To overcome problems associated with conventional lumped FACTS devices, a new device, distributed static series compensator (DSSC) is introduced. This device can be manufactured from low cost conventional industrial-grade mass produced components. Also, it attaches directly to existing transmission system and so does not require any kind of high voltage insulation. The impact of installation of the DSSC is examined by analyzing its impact on various parameters of power system. With help of the power system simulation, a major advancement in transmission line parameters can be achieved with help of the DSSC.