# Frequency deadband in GGOV1 model

Hi All, I am trying to put a 0.1Hz dead band in GGOV1 model. Now the deadband is to be stated in terms of pu speed. I calculated 0.1Hz dead-band from frequency (say 50Hz) and got 0.002 p.u and plug it in the model. With this value my model is responding to a frequency less than 0.1Hz, i.e. if I put 0.5Hz frequency change then it is calculating the MW change for 0.4Hz w.r.t droop. My answer should be the model should not be responding up to 0.1 Hz then it should respond to the MW change in line with droop. Please could you spot what am I missing here?

EDIT, inserted graphs:

Injected Frequency Ramp:

Unit Output:

I don’t understand. In what way is the model not responding as expected?

It is not responding to deadband. It's MW response is incorrect w.r.t droop.

For instance, with 0.002 p.u (0.1Hz) db set and -0.5Hz ramp F change, it is not supposed to react at the instant of ramp F change and wait until 0.1Hz F drop is exceeded. It is not doing so. The MW response is less than what it should actually be producing with 4% or 3% droop and turbine rating.

You need to supply more detailed information. Not only say that the response is not what you expect!

Do you have an email id if okay to share?