Thank you for your help.
Best regards.

Ana

I hope you are doing well. I am currently working on verifying some academic data and grade conversions, and I’m encountering inconsistencies when comparing computations between different online GWA (General Weighted Average) tools.

To validate the results, I tested several calculators, including one from a site I frequently use for Philippine academic grading. An online GWA calculator that provides GWA, GPA and percentage conversions.

However, when I compare the results from these tools with values processed in WAsP-related workflows, the calculations do not fully align specifically when weighted inputs or multi-unit records are involved.

My questions are:

1. Could WAsP’s handling of weighted averages differ from standard academic weighted-average calculations?
2. Is there any known issue when using externally computed data (such as GWA values) within WAsP data processing steps?
3. Are there recommended guidelines for ensuring consistency when importing numerical values or derived datasets?

Any advice, clarification, or documentation would be greatly appreciated.

Best regards,

Now i'm using the WAsP 11.6 Version + Windpro 3.2, W
Previously, I can calculation directly by using the GWA version 3.4 to windpro, but after the large update GWA 4.0 version, I cann't calculate, in the wind pro with the same map and location setup.

"The selected calculation contains roughness values that are exceeding the maximum roughness allowed in the wind statistic with appropriate WAsP parameter or use the Wind Statistic roughness extrapolator tool to change an existing wind statistic."

Where can I download WAsP 12.7? I am currently working with WAsP 12.8; however, we have received a project where it's part of the contract to use WAsP 12.7 for energy simulation. Any help or suggestions would be greatly appreciated, as I am unable to get any response from WAsP support.

I hope this message finds you well.

I am experiencing difficulties calculating energy production in WAsP using Generalized Wind Climate (GWC) files obtained from the Global Wind Atlas (GWA). Specifically, I have attempted the following:

• Directly importing GWC files downloaded from the GWA.

• Importing .lib files generated from the GWA data.

In both cases, WAsP does not compute the expected production values. However, I have verified that the map data is correctly loaded, as WAsP successfully calculates the roughness (Rx) values.

The site in question is located in Asia. Could the geographical location be contributing to this issue?

I would appreciate any insights or guidance you can provide to resolve this matter.

Best regards,

Petar Dundović

based on old knowledge and after discussion with a colleague, i am a bit confused about how WAsP handles many roughness changes in short distances.

from a colleague, she mentioned if 10 different roughness changes were observed by WAsP in short distances (let's say in 3km), WAsP did not consider roughness changes any further in distances (in this case from 3km up to 20km - typical map size and boundary). is this true?

Based on recent improvement and implementation of QGIS instead of Map editor, the user can digitize more detailed roughness. if the above is applied, then i am wondering the impact.

could you explain me and advise me how WAsP handles many roughness changes in short distances?

regards,

Gyeongil

I have two masts at the site and more than 20 wind turbines are planned. during test simulation i found out wake calculations by two different masts are quite different and in the end energy level differences are also high. i have not used default settings of wake settings in PARK2 but try to adjust and simulate. one parts of turbine groups are close to mast 1 and another groups are close to mast 2. the elevation difference between mast 1 and 2 are almost 200m asl. that is why I considered it makes more sense to separate two groups. however, all wind turbines should be considered as a whole. Are there any way to calculate wakes by applying different wake parameters in a wind farm? i am thinking to make the results separately and merge together. but in this case, i should consider again the wake by each group. it would be great if you could advise me how to apply in WAsP.

regards,

Gyeongil

i am trying to use WAsP for south African projects and found out many data is already available from webpage: https://wasadata.csir.co.za/.

in the section "WASA Observational Wind Atlas" there are links to DTU servers but it seems not working anymore.
//
The following files are not yet available on the local server, but can be downloaded from the DTU server

Observed wind climate (OWC)
Generalised wind climates (GWC)
WAsP analysis of WASA stations (WWH)
//

Are those data still available from DTU server? 
if yes, could you please provide me the new/updated links?
if not, are there any way to download those data sets?

please advise me.

BR,
Gyeongil

I just started working with a freshly-installed WAsP 12.9 after many years with WAsP 11. I was surprised to find quite a few changes, the following seem to be the main ones as far as I am concerned. Could you please provide more details? I could not find much documentation, other than a short description in the release notes.

1. Legacy vs. "new" IBZ - meaning and significance?

2. Possibility of editing default wind atlas structure now both in project and GWC (and seems they do not synchronize with each other in either direction?). Could you please explain the behavior of this setting. Also, is it still the standard recommendation to modify the heights and roughness values to match the main project specific values?

3. New stability model T* + properties are now filled in the GWC stability tab, for both the legacy and the new model. Could you please explain about the T* model, and perhaps provide some references?

4. Geostrophic shear tab - could you please provide some more details on that. Does turning it off mean falling back on the legacy WAsP model?

Thanks,

Reuven

Location: 5000 11400              
Height: 80.0                   
12                                      
6                                    
0 2 4 6 8 10 15               
 

regards

Hello,

I am new to WAsP and currently following the step-by-step Serra Santa Luzia tutorial provided in the help section. While I have been able to follow the instructions successfully so far, I am encountering an issue when reaching the step for "adding a site description."

The software does not automatically read the location as described in the tutorial. Additionally, the symbol for my Generalized Wind Climate (GWC) in the hierarchy list is represented in red instead of yellow (as shown in the tutorial).

I suspect this might be related to either the GWC or the map file, but I am not sure how to resolve it. I would greatly appreciate any guidance on what might be causing this issue and how to fix it.

Thank you in advance for your help!

Is it possible to get some assistance with WASP case study?

Thanks!

Petar

when attempting to import a GWC or vector map from the Global Wind Atlas using the "insert From Global Wind Atlas" function in the right-click menu, I am met with the following error:

Exception report produced at 2024-10-22 11:44:08

The request was aborted: Could not create SSL/TLS secure channel. raised at: 2024-10-22 11:41:56
    2024-10-22 11:41:56: Exception raised in: System:Net:HttpWebRequest:GetResponse
    2024-10-22 11:41:56: Message added: Could not establish secure channel for SSL/TLS with authority 'dtu-pferdemund-01.eu'
    2024-10-22 11:41:56: Exception raised in: Server stack trace:
    2024-10-22 11:41:56: Message added: Could not create a data source
    2024-10-22 11:41:56: Exception raised in: Rvea0364:Implementation:cTerrainDataSource:Constructor
    2024-10-22 11:41:56: Message added: Cannot create a data retrieval session
    2024-10-22 11:41:56: Exception raised in: Rvea0364:Rvea0364Classes:Rvea0364:IRvea0364Classes:CreateTerrainDataRetrievalSession
    2024-10-22 11:41:56: Message added: Could not get a map from GWA3 servers
    2024-10-22 11:41:56: Exception raised in: WAsP:cGwaMapRetriever.GetVectorMap
    2024-10-22 11:41:56: Message added: Could not insert a new hierarchy member by reference
    2024-10-22 11:41:56: Exception raised in: WAsP: cWorkspaceInsertionExpert:ExecuteMemberInsertionCustomVectorMap
    2024-10-22 11:41:56: Message added: There was a problem with the insertion
    2024-10-22 11:41:56: Exception raised in: WAsP:cWorkspaceInsertionExpert:ExecuteHierarchyInsertion
    2024-10-22 11:41:56: Message added: Insertion failed
    2024-10-22 11:41:56: Exception raised in: WAsP:cWorkspaceController:ExecuteHierarchyInsertion
    2024-10-22 11:41:56: Message added: The insertion was not successfully completed
    2024-10-22 11:41:56: Exception raised in: WAsP:cMemberPopupMenuMediator:ProcessInsertionFromMenu
    2024-10-22 11:42:03: Message added: Could not get a map from GWA3 servers
    2024-10-22 11:42:03: Exception raised in: WAsP:cGwaMapRetriever.GetVectorMap
    2024-10-22 11:42:03: Message added: Could not insert a new hierarchy member by reference
    2024-10-22 11:42:03: Exception raised in: WAsP: cWorkspaceInsertionExpert:ExecuteMemberInsertionCustomVectorMap
    2024-10-22 11:42:03: Message added: There was a problem with the insertion
    2024-10-22 11:42:03: Exception raised in: WAsP:cWorkspaceInsertionExpert:ExecuteHierarchyInsertion
    2024-10-22 11:42:03: Message added: Insertion failed
    2024-10-22 11:42:03: Exception raised in: WAsP:cWorkspaceController:ExecuteHierarchyInsertion
    2024-10-22 11:42:03: Message added: The insertion was not successfully completed
    2024-10-22 11:42:03: Exception raised in: WAsP:cMemberPopupMenuMediator:ProcessInsertionFromMenu
    Latest thread started in: WAsP:fProgressMonitor:Form_Load

Apologies if the solution is obvious, I am new to the software.

Thanks for any help in advance.

I have been investigating how large roughness maps are processed on WAsP, and have found the following two paper which describe some aspects of how the roughness rose is generated:
https://wes.copernicus.org/articles/6/1379/2021/wes-6-1379-2021.html
https://wes.copernicus.org/articles/3/353/2018/wes-3-353-2018.pdf

I now understand that WAsP simplifies large roughness maps with many roughness changes into a roughness rose, and that each sector of this rose has a maximum of 10 roughness changes by default. I have also observed that a great amount of simplification is involved, as I have personally tested large roughness maps with more than 10 roughness changes in a given sector and seen resulting roughness roses with at most 5 changes in any sector.

I have not found a detailed description of how the roughness changes used on the roughness rose are chosen or how WAsP simplifies or averages several roughness changes on the original roughness map into one roughness value on the corresponding section of the roughness rose. Does such a description exist anywhere?

I am encountering an issue with data usage. Previously, I would import a .tab file, map vectors in WAsP, perform calculations, and obtain a .lib file. In Winpro, I utilized this .lib file as wind statistics in Site data. However, in the latest version of WAsP, the .lib file has been replaced by a .gwc file. Unfortunately, the wind statistics in Site Data currently only accepts .lib files.

Could you please assist me in using the .gwc file appropriately so that I can use it for park calculations?

Thank you for your support.

Best regards,
Trantduc

I was not able to find anywhere which method is used to calculate the weibull parameters A and k. Can anyone confirm the method of weibull estimation used and whether there are any special approaches taken by WASP in the estimation? 

I would like to gain a better understanding of the losses that WAsP takes into account. I know that there's the wake effect but what are the rest? And What models to you use to calculate them?

Thank you in advance 🙂

Lidia N

Is it possible to export matrices of production per WTG, per wind direction and wind speed bins in WAsP?

Many thanks for your support,

Elie