The IEEE 6-bus system is a small but instructive test network widely used in power systems research and education. Originally developed to provide a simple, well-documented benchmark for power‑flow, stability, and protection studies, this system captures the core characteristics of larger transmission networks while remaining compact enough for analytical work, classroom demonstrations, and software testing.

: The IEEE 6 Bus System Data Overview on Scribd includes bus types, voltage levels, and transmission line impedances.

: Generator (PV) Buses, which maintain fixed voltage magnitudes but have variable angles and real power outputs. Buses 4, 5, & 6

Voltage-controlled generator buses with fixed voltage magnitudes and specified real power outputs.

(Free, legal)

Studying system response to faults (e.g., three-phase or line-to-ground).