Overview

This model simulates the shaft speed of a turbine system under braking. Brake power is applied as a percentage of the maximum, governed by a PID equation with user-defined parameters. The turbine's water input power is reduced over a guide vane closing time, during which the torque is linearly reduced.

Accuracy and Assumptions

• The model includes a small friction term to ensure the shaft eventually stops.
• The linear torque reduction during guide vane closing is an assumption; in reality, this may be non-linear for the turbine.

PID Equation Note

• The Kp and Ki values are tuned for speed (in RPM) and brake force (in percentage). These may differ from real-world brake parameters.
• If a PID model uses different units (e.g., radians/second for speed or oil pressure for brake force), the Kp and Ki values will differ significantly.
• The simulation results remain valid, but the parameter values are not directly transferable to systems with different units.