I have posted at my Google Drive site a python script to calculate the inertia of a power system. Generator models supported are 'GENDCO', 'GENROE', 'GENROU', 'GENTPJ1','GENSAE', 'GENSAL','GENTRA'. Data input are base case non-converted or converted and the corresponding snp file. It prints out the inertia (in GW-sec) of the system.
* saving a SNP file *
In the PSSe GUI, after reading the case, convert the loads and generators, apply activities ORDR, FACT, TYSL, then save it as a converted case (still with sav extension).
Next read the dyr file (use OPEN file) and enter data as needed (see API manual for "dyre_new").
In code format:
psspy.dyre_new([1,1,1,1],dyrfile) #as example
After this step, select "SAVE" and enter a name with extension.snp. In code format:
ierr = psspy.snap([-1,-1,-1,-1,-1],'case.snp') #as example
Hi,This python code of yours can be used normally in the savnw .sav that comes with PSSE, but can your python script calculate the inertia of the new energy power system containing wind farms? I still use your New energy power systems with wind farms（ieee39RE.sav and ieee39RE.snp） to calculate the system inertia, but the results are shown as follows after operation：
Inertialess Machine model found:GENTPJU1
Inertialess Machine model found:GENTPJU1
Inertialess Machine model found:GENTPJU1
Inertialess Machine model found:GENTPJU1
Inertialess Machine model found:GENTPJU1
Inertialess Machine model found:GENTPJU1
Inertialess Machine model found:GENTPJU1
Inertialess Machine model found:GENTPJU1
Inertialess Machine model found:GENTPJU1
Inertialess Machine model found:GENTPJU1
Bus ID MacInertia TotalInertia
System Inertia: 0.00 GW-sec
Please how can I get the correct system inertia,？I would be very grateful if you could reply！
I have updated the code "inertia.py" to process the generator model "GENTPJU1". Thanks for your feedback and interest. Download the script again.
Comments
awesome! thanks!
Hi, I got a problem with *snp file, do you know how to create the *snp file from *dyr file ? I used Save As the *dyr file to *snp file. However, when I run the API, the comment is " No data in memory" do you know why ?
Thanks for this! The result is basically in GW-s, so we need to divide it by the total production if we want to get inertia in seconds. WPP type 4 and PV are fully connected via converter but should we consider the impact of WPP type 3 on system inertia?