Investigation of small signal stability of a renewable energy based electricity distribution system

As the issues on market deregulation and renewable energy utilization are gaining significance, distributed generators are planned and installed in distribution systems to supply consumers directly. The distribution system is, therefore facing new challenges on its dynamic behavior with the addition of new dynamic devices. This paper investigates the small signal stability of renewable energy based distribution system. The distribution system is fed by synchronous, induction and static generators. The voltage controlled and power factor controlled operations of the synchronous generator are also considered. The results showed that wind generator dynamics are very significant in the system oscillations. The solar PV generator improves the small signal behavior of the system. The impact of penetration of renewable energy resources on a system is demonstrated through eigenvalue analyses. The eigenvalue results are corroborated with the help of time domain analysis.