def Vgrms_calc(self):
"""Grid side terminal voltage - RMS"""
return utility_functions.Urms_calc(self.vag, self.vbg, self.vcg)
def Vtrms_calc(self):
"""Inverter terminal voltage - RMS"""
return utility_functions.Urms_calc(self.vta,self.vtb,self.vtc)
def Vrms_calc(self):
"""PCC LV side voltage - RMS"""
return utility_functions.Urms_calc(self.va,self.vb,self.vc)
def Irms_calc(self):
"""Inverter current - RMS"""
return utility_functions.Urms_calc(self.ia,self.ib,self.ic)
def setup(self, nodeid, V0):
try:
VpuInitial = 1.0
SinglePhase = False
if 'myconfig' in OpenDSSData.config and 'DERParameters' in OpenDSSData.config[
'myconfig']:
#pvderConfig = copy.deepcopy(OpenDSSData.config['myconfig']['DERParameters'])
DERFilePath = OpenDSSData.config['myconfig']['DERFilePath']
DERModelType = OpenDSSData.config['myconfig']['DERModelType']
DERSetting = OpenDSSData.config['myconfig']['DERSetting']
DERParameters = OpenDSSData.config['myconfig']['DERParameters']
if DERSetting == 'default':
pvderConfig = self.get_derconfig(DERParameters['default'])
DERArguments = self.get_derarguments(
DERParameters['default'])
elif DERSetting == 'PVPlacement': # for manual feeder config based on PVPlacement
if nodeid in DERParameters['PVPlacement']:
pvderConfig = self.get_derconfig(
DERParameters['PVPlacement'][nodeid])
DERArguments = self.get_derarguments(
DERParameters['PVPlacement'][nodeid])
else:
raise ValueError(
'Distribution node {} not found in config file!'.
format(nodeid))
else:
raise ValueError(
'{} is not a valid DER setting in config file!'.format(
DERSetting))
if 'nodenumber' in OpenDSSData.config['myconfig']:
DERLocation = str(os.getpid()) + '-' + 'bus_' + str(
OpenDSSData.config['myconfig']
['nodenumber']) + '-' + 'node_' + nodeid
else:
DERLocation = str(os.getpid()) + '-' + 'node_' + nodeid
else:
print(
'DERParameters not found in `OpenDSSData` object - using default ratings and parameters!'
)
DERArguments = {}
pvderConfig = {}
SteadyState = True
if SinglePhase:
powerRating = 10.0e3
else:
powerRating = 50.0e3
DERLocation = 'node_' + nodeid
DERArguments.update({'pvderConfig': pvderConfig})
DERArguments.update({'powerRating': powerRating})
DERArguments.update({'SteadyState': SteadyState})
#Va = cmath.rect(DERArguments['VrmsRating']*math.sqrt(2),0.0)
#Vb = utility_functions.Ub_calc(Va)
#Vc = utility_functions.Uc_calc(Va)
a = utility_functions.Urms_calc(
V0['a'], V0['b'], V0['c']) / DERArguments['VrmsRating']
Va = (V0['a'] / a) #Convert node voltage at HV side to LV
Vb = (V0['b'] / a)
Vc = (V0['c'] / a)
DERArguments.update({'identifier': DERLocation})
DERArguments.update({'derConfig': pvderConfig})
DERArguments.update({'standAlone': False})
DERArguments.update({'gridFrequency': 2 * math.pi * 60.0})
DERArguments.update({'gridVoltagePhaseA': Va})
DERArguments.update({'gridVoltagePhaseB': Vb})
DERArguments.update({'gridVoltagePhaseC': Vc})
logging.debug(
'Creating DER instance of {} model for {} node.'.format(
DERModelType, DERLocation))
print('Creating DER instance of {} model for {} node.'.format(
DERModelType, DERLocation))
events = SimulationEvents()
PVDER_model = DERModel(modelType=DERModelType,
events=events,
configFile=DERFilePath,
**DERArguments)
self.PV_model = PVDER_model.DER_model
self.PV_model.LVRT_ENABLE = True #Disconnects PV-DER based on ride through settings in case of voltage anomaly
self.sim = DynamicSimulation(PV_model=self.PV_model,
events=events,
LOOP_MODE=True,
COLLECT_SOLUTION=True)
if DERModelType in self.sim.jac_list:
self.sim.jacFlag = True #Provide analytical Jacobian to ODE solver
else:
self.sim.jacFlag = False
self.sim.DEBUG_SOLVER = False #Check whether solver is failing to converge at any step
self.results = SimulationResults(simulation=self.sim,
PER_UNIT=True)
self.lastSol = copy.deepcopy(self.sim.y0) # mutable,make copy
self.lastT = 0
except Exception as e:
OpenDSSData.log("Failed Setup PVDER at node:{}!".format(nodeid))
