Power System Simulator to Evaluate Impact of High Penetration of Renewable Energy Resources

The introduction of a significant amount of variable renewable energy (VRE) destabilizes power systems due to the decrease in the number of conventional generators connected to power systems. Stability evaluation and proactive measures are required to maintain stability. We developed a power-system simulator for stability evaluation, which consists of power generation planning for calculating generator operation based on future demand and renewable energy, power-system modeling with topology such as connection of transmission lines and generator dynamics, and practical evaluation such as stability, economic and environmental impact. We give an overview of this simulator and discuss destabilization due to introduction of VRE and stabilization by suppressing its output power.