Running irradproc submodule with PySSC

caseyzak24
Topic Author

09 Mar 2018 14:22 #6107 by caseyzak24

Running irradproc submodule with PySSC was created by caseyzak24

I am attempting to use the

Code:

irradproc

module and the

Code:

PySSC

wrapper to calculate sun zenith angle. Here is my Python code:

Code:

sp=SolarProject()
ssc = PySSC()
ssc.module_exec_set_print(0)
#create the data container where everthing gets carried around
wfd = ssc.data_create()
ssc.data_set_array(wfd,b'beam',[0]*8760)
ssc.data_set_array(wfd,b'diffuse',[0]*8760)
ssc.data_set_number(wfd, b'lat', sp._lat)
ssc.data_set_number(wfd, b'lon', sp._lon)
ssc.data_set_number(wfd, b'tz', sp._tz)
ssc.data_set_array(wfd, b'year', sp._year.tolist())
ssc.data_set_array(wfd, b'month', sp._month.tolist())
ssc.data_set_array(wfd, b'day', sp._day.tolist())
ssc.data_set_array(wfd, b'hour', sp._hour.tolist())
ssc.data_set_array(wfd, b'minute', sp._minute.tolist())
ssc.data_set_number(wfd, b'azimuth', sp.azimuth)
ssc.data_set_number(wfd, b'track_mode', 1)

Code:

####RUN THE SIMULATION####
module = ssc.module_create(b'irradproc')
if ssc.module_exec(module, wfd) == 0:
    print('irradproc simulation error')
    idx = 1
    msg = ssc.module_log(module, 0)
    while (msg != None):
        print('    : ' + msg.decode("utf - 8"))
        msg = ssc.module_log(module, idx)
        idx = idx + 1
    SystemExit( "Simulation Error" );
ssc.module_free(module)
#Check the desired output
np.array(ssc.data_get_array(wfd, b'sun_zen'))[:100]

I get the following error:

Code:

irradproc simulation error
    : ssc variable does not exist: 'global'

I am not sure if the error is because PySSC is setup to only run the

Code:

pvsamv1

and PySSC is asking for something that ssc doesn't have in this case or if this is an error internal to the compiled ssc libraries. OR, perhaps I am just using the submodule wrong.

Any help with this issue would be greatly appreciated.

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Angus King

11 Mar 2018 09:12 #6108 by Angus King

Replied by Angus King on topic Running irradproc submodule with PySSC

Casey

See my response to your post on the SAM forum -> sam.nrel.gov/comment/8563#comment-8563

Kind regards

Angus

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