- #1
vampslayer
- 24
- 0
Hi!
When my Hydroelectric station is not connected to a GRID (islanded mode)
I control the frequency or the speed, and here are the equations for my turbine:
http://oi46.tinypic.com/3127ixe.jpg
Look the third equation.
I built that in Matlab Simulink, and my out put is turbine speed n[o/min]
http://oi48.tinypic.com/1zqc3o5.jpg
That's all good. But now I want to make simulation model when my hydroelectric station is connected to the GRID.
In that case I control the Power and my speed is constant, f=50Hz so n=const.
So I need equations for that case, and If I look my third equation
dw/dt=(1/J)*(Mv-Mtr-Mt)
dw/dt=0(because speed is const) -> Mt=Mtr-Mv
So my equation in this case is Mt=Mtr-Mv ?
Mt is load torque and I think it should be my output if I want to control the power
Mv- is Torque developed on turbine blades(Torque of water)
Mtr - friction torque
I just want to check am I right about this guys?
When my Hydroelectric station is not connected to a GRID (islanded mode)
I control the frequency or the speed, and here are the equations for my turbine:
http://oi46.tinypic.com/3127ixe.jpg
Look the third equation.
I built that in Matlab Simulink, and my out put is turbine speed n[o/min]
http://oi48.tinypic.com/1zqc3o5.jpg
That's all good. But now I want to make simulation model when my hydroelectric station is connected to the GRID.
In that case I control the Power and my speed is constant, f=50Hz so n=const.
So I need equations for that case, and If I look my third equation
dw/dt=(1/J)*(Mv-Mtr-Mt)
dw/dt=0(because speed is const) -> Mt=Mtr-Mv
So my equation in this case is Mt=Mtr-Mv ?
Mt is load torque and I think it should be my output if I want to control the power
Mv- is Torque developed on turbine blades(Torque of water)
Mtr - friction torque
I just want to check am I right about this guys?