# Load step at bus 3 at t = 1 s: +20 MW, +5 Mvar on the constant-impedance
# load (PSID twin: LoadChange of the impedance references; both tools scale
# the admittance at the initial power-flow voltage). The electrical-torque
# step excites the torsional modes of the shaft chain.
Disturbance, time = 1.0, type = "LOAD", bus = "3", p_delta = 20, q_delta = 5
