Equilibrium points and stability of synchronous machine systems
Provides analytical insights into equilibrium and stability of synchronous machine systems for power system engineers.
This paper derives equilibrium conditions for single and two synchronous machine systems, showing they reduce to cubic and 18th-degree polynomials respectively, and analyzes stability via Lyapunov and eigenvalue methods. Results confirm multiple equilibria and parameter effects on stability.
This paper investigates equilibrium points and stability in two synchronous machine configurations: (i) a single generator with an impedance load and (ii) two interconnected machines with co-located loads. We consider both abc and dq reference frames to show that the equilibrium condition reduces to a cubic polynomial in the single-machine case and to an 18th- degree polynomial in the two-machine case. For the single-machine system, Lyapunov stability analysis and linearization based stability analysis are carried out. For the two-machine system, local stability is assessed through linearization and eigenvalue analysis. Illustrative examples confirm the existence of multiple equilibria and illustrate the impact of parameter variation on stability. Our results provide insight into the stability of synchronous machine systems.