def _init_PVWatts(self):
"""Configure PV system using simplified PVWatts model"""
try:
pvwatts_module = {
'pdc0': self.config[self._cfg].getfloat('SystemPower'),
'gamma_pdc':
self.config[self._cfg].getfloat('TemperatureCoeff')
}
pvwatts_inverter = {
'pdc0': self.config[self._cfg].getfloat('InverterPower'),
'eta_inv_nom':
self.config[self._cfg].getfloat('NominalEfficiency')
}
pvwatts_losses = {
'soiling': 0,
'shading': 0,
'snow': 0,
'mismatch': 0,
'wiring': 2,
'connections': 0.5,
'lid': 0,
'nameplate_rating': 0,
'age': 0,
'availability': 0
}
tempModel = self.config.get(self._cfg, 'TemperatureModel')
self._pvsystem = PVSystem(
surface_tilt=self.config[self._cfg].getfloat('Tilt'),
surface_azimuth=self.config[self._cfg].getfloat('Azimuth'),
module_parameters=pvwatts_module,
inverter_parameters=pvwatts_inverter,
losses_parameters=pvwatts_losses,
temperature_model_parameters=TEMPERATURE_MODEL_PARAMETERS[
'sapm'][tempModel])
self._mc = ModelChain.with_pvwatts(self._pvsystem,
self._location,
dc_model='pvwatts',
ac_model='pvwatts',
aoi_model='physical',
spectral_model='no_loss')
self.pv_model = 'PVWatts'
except Exception as e:
print("init_PVWatts: " + str(e))
sys.exit(1)
def test_with_pvwatts(pvwatts_dc_pvwatts_ac_system, location, weather):
mc = ModelChain.with_pvwatts(pvwatts_dc_pvwatts_ac_system, location)
assert mc.dc_model == mc.pvwatts_dc
assert mc.temperature_model == mc.sapm_temp
mc.run_model(weather)
