Enhancement of small signal stability of a renewable energy based electricity distribution system using shunt controllers

Integration of renewable energy resources into an electricity distribution system has raised many challenges, including a number of stability issues. There are complex interactions among distributed generators due to their different manufacturing technologies, intermittent primary source of energy, and unregulated operations. Further, conventional shunt capacitors, which was used to support the voltage in the past could have adverse effect on oscillation damping. This paper presents an approach to locate compensating devices to enhance oscillation damping of a renewable energy based distribution system. The superiority of SVCs, which is one of the well known FACTS controllers, over shunt capacitors to enhance small signal stability is also presented.