Abstract
This report explains and documents the dynamics of voltage instability on large power systems at a basic and intuitive level. The project will outline the voltage instability phenomenon and leave the specific details for individual investigation. Understanding what causes voltage instability and why this may cascade into a voltage collapse requires knowledge of how key components of the power system are affected by low voltage. Power System components will respond at different time frames, contributing to faster transient voltage instability, and/or slower, long term voltage instability. Simulations will show how the components of voltage instability contribute to cause low voltage conditions. Popular power flow methods such as PV and QV curves are used to show how a system can be analyzed for voltage stability. Finally, several possible solutions that could help stabilize voltage for large power systems will be discussed.