Assessing Impact of Large Scale Integration of Wind and Solar PV Power Generation on Small Signal and Transient Stability

One imperative challenge in building a sustainable electricity future is to integrate renewable energy sources in the present energy mix. Renewable energy sources are inherently different in nature from their conventional counterparts. Thus integration to existing system posses a substantial challenges. In this paper using a IEEE 14 bus test system the effect of large scale and distributed integration of wind and solar PV on power system stability is assessed using PSAT. Both small signal and transient stability are studied with varying amount of renewable energy in the system. From the simulation results, it is observed that the small signal stability degrades with higher renewable energy penetration, and the transient frequency and voltage response of the system worsens as well with higher renewable energy in the system, but nonetheless the systems in different scenarios remains stable despite having poor damping.