GovHydroFrancis

Class Description

Detailed hydro unit - Francis model. This model can be used to represent three types of governors.
A schematic of the hydraulic system of detailed hydro unit models, such as Francis and Pelton, is provided in the DetailedHydroModelHydraulicSystem diagram.

Attributes

Name Type Description
am PU Opening section SEFF at the maximum efficiency (Am). Typical value = 0,7.
av0 Area Area of the surge tank (AV0). Unit = m2. Typical value = 30.
av1 Area Area of the compensation tank (AV1). Unit = m2. Typical value = 700.
bp PU Droop (Bp). Typical value = 0,05.
db1 Frequency Intentional dead-band width (DB1). Unit = Hz. Typical value = 0.
etamax PU Maximum efficiency (EtaMax). Typical value = 1,05.
governorControl FrancisGovernorControlKind Governor control flag (Cflag). Typical value = mechanicHydrolicTachoAccelerator.
h1 Length Head of compensation chamber water level with respect to the level of penstock (H1). Unit = km. Typical value = 0,004.
h2 Length Head of surge tank water level with respect to the level of penstock (H2). Unit = km. Typical value = 0,040.
hn Length Rated hydraulic head (Hn). Unit = km. Typical value = 0,250.
kc PU Penstock loss coefficient (due to friction) (Kc). Typical value = 0,025.
kg PU Water tunnel and surge chamber loss coefficient (due to friction) (Kg). Typical value = 0,025.
kt PU Washout gain (Kt). Typical value = 0,25.
qc0 PU No-load turbine flow at nominal head (Qc0). Typical value = 0,1.
qn VolumeFlowRate Rated flow (Qn). Unit = m3/s. Typical value = 250.
ta Seconds Derivative gain (Ta) (>= 0). Typical value = 3.
td Seconds Washout time constant (Td) (>= 0). Typical value = 6.
ts Seconds Gate servo time constant (Ts) (>= 0). Typical value = 0,5.
twnc Seconds Water inertia time constant (Twnc) (>= 0). Typical value = 1.
twng Seconds Water tunnel and surge chamber inertia time constant (Twng) (>= 0). Typical value = 3.
tx Seconds Derivative feedback gain (Tx) (>= 0). Typical value = 1.
va Float Maximum gate opening velocity (Va). Unit = PU / s. Typical value = 0,06.
valvmax PU Maximum gate opening (ValvMax) (> GovHydroFrancis.valvmin). Typical value = 1,1.
valvmin PU Minimum gate opening (ValvMin) (< GovHydroFrancis.valvmax). Typical value = 0.
vc Float Maximum gate closing velocity (Vc). Unit = PU / s. Typical value = -0,06.
waterTunnelSurgeChamberSimulation Boolean Water tunnel and surge chamber simulation (Tflag).
true = enable of water tunnel and surge chamber simulation
false = inhibit of water tunnel and surge chamber simulation.
Typical value = false.
zsfc Length Head of upper water level with respect to the level of penstock (Zsfc). Unit = km. Typical value = 0,025.

Relationships

Inherits from

Descendant classes

  • No descendant classes

Leaf/Root class

IsLeaf IsRoot
False False

Associations

None