# Governor Model: WTGT_B

AutoCorrection Properties

Following checks and corrections are applied during Validation and AutoCorrection.

- KShaft: If 1/(KShaft/(2*Pi*NominalFrequency) * ( (Ht + Hg) * 2*Pi * 60) / ( 2*sqr(2*Pi) * Ht*Hg ))< TwoMassMassFrequencyMultiplier*TimeStep. We will treat as a one-mass model instead with H = (Ht + Hg).

Mult represents the user-specified value **Minimum time constant size as multiple of time step** option on the Validation page of the Transient Stability Dialog

TimeStep represents the integration time step being used as described on TimeStep

Model Equations and/or Block Diagrams

**Parameters:**

Ht | Turbine inertia, MW-sec/MVA |

Hg | Generator inertia, MW-sec/MVA |

DShaft | Shaft damping coefficient p.u. |

KShaft | Spring constant, p.u. |

MWCap | Model MVA Base, If <= 0 then use base of machine model |

W0 | Initial speed, pu |

Tp | Time constant for electrical to mechanical power, seconds |

Damp | Machine damping coefficient, pu Power/pu speed |