Re: Type 90

[Michaël Kummert <kummert@xxxxxxxxxxxxx>]

Jhunko,

> How do I import "power data curve" as an external file for wind turbine 
> Type 90?
Type 90 is not very user-friendly, and the "0" default value for the 
logical unit is only one example.

I made a simple example that just redraws the power curve of 4 wind 
turbines (see attachment). The data is read by Type 90 in ".pwr" files, 
which are just text files describing the power output of each turbine 
(the .pwr extension is just a convention).

The *.pwr files in the attachment include comments that explain what 
data should be in there. Hopefully you will be able to create other .pwr 
files for Type 90 using your own data.

Please note the following peculiarities about Type90:
- Pay attention to the formatting of the input file (see the comments).
  In particular Type90 will not read correctly the control mode if you
  change the number of spaces between Ctl_mode and the character that
  defines the mode (S, P or V)
- The Power output of Type 90 is multiplied by the time step (actually
  making it an energy output). I can't see any good reason to do that
  but we can't really change it for backwards compatibility reasons. The
  attached example copes with that by using an equation to make sure the
  power output is in kW for any time step.
- The .pwr file includes lines for units. Those lines are actually
  ignored by Type 90. You can use any consistent unit system but I
  strongly recommend to use m, m/s and kW. No need to add one source
  of confusion...

Kind regards,

Michaël Kummert


_________________________________________________________

Michaël Kummert

Solar Energy Laboratory - University of Wisconsin-Madison
1303 Engr Res Bldg, 1500 Engineering Drive
Madison, WI 53706

Tel: +1 (608) 263-1589
Fax: +1 (608) 262-8464
E-mail: kummert@engr.wisc.edu

SEL Web Site: http://sel.me.wisc.edu
TRNSYS Web Site: http://sel.me.wisc.edu/trnsys

Attachment: Type90Test.zip
Description: Zip compressed data