def string_notes(system, run=0.0, station_class=3):
"""page 5"""
name, usaf = geo.closest_usaf(geo.zip_coordinates(system.zipcode), \
station_class)
mintemp = eere.minimum(usaf)
twopercent_temp = eere.twopercent(usaf)
ac_kva_rated = 0.0
dc_rated = 0.0
ac_kw = 0.0
for i in system.shape:
dc_rated += i.array.p_max
try:
if i.phase == 1:
ac_kva_rated += i.current * i.ac_voltage
else:
ac_kva_rated += i.phase * i.current * i.ac_voltage / 3**.5
except Exception:
ac_kva_rated += i.p_aco
ac_kw += i.p_aco
notes = []
notes.append("%s KVA AC RATED" % round(ac_kva_rated/1000.0, 2))
notes.append("%s KW AC RATED" % round(ac_kw/1000.0, 2))
notes.append("%s KW DC RATED" % round(dc_rated/1000.0, 2))
#BUG: This doesn't work for unbalanced 3 phase
if system.phase == 1:
a_ac = round(ac_kva_rated/i.ac_voltage, 1)
else:
a_ac = round(ac_kva_rated/i.ac_voltage/3**.5, 1)
notes.append("System AC Output Current: %s A" % a_ac)
notes.append("Nominal AC Voltage: %s V" % i.ac_voltage)
notes.append("")
notes.append("Minimum Temperature: %s C" % mintemp)
notes.append("2 Percent Max Temperature: %s C" % twopercent_temp)
notes.append("Weather Source: %s %s" % (name, usaf))
notes.append("")
d_inverters, d_panels = system.describe()
a_max = 0
for i in system.shape:
module_name = i.array.dump()['panel']
if d_panels.has_key(module_name):
module = modules.Module(module_name)
notes.append("PV Module Ratings @ STC")
notes.append("Module Make: %s" % module.make)
notes.append("Module Model: %s" % module.model)
notes.append("Quantity: %s" % d_panels[module_name])
notes.append("Max Power-Point Current (Imp): %s A" % module.i_mpp)
notes.append("Max Power-Point Voltage (Vmp): %s V" % module.v_mpp)
notes.append("Open-Circuit Voltage (Voc): %s V" % module.v_oc)
notes.append("Short-Circuit Current (Isc): %s A" % module.i_sc)
notes.append("Maximum Power (Pmax): %s W" % round(module.p_max, 1))
notes.append("")
d_panels.pop(module_name)
if d_inverters.has_key(i.model):
notes.append("Inverter Make: %s" % i.make)
notes.append("Inverter Model: %s" % i.model)
notes.append("Quantity: %s" % d_inverters[i.model])
notes.append("Max Power: %s KW" % round(i.p_aco/1000.0, 1))
#this is hack... This should be calculated based upon power cores
if hasattr(i, 'current'):
notes.append("Max AC Current: %s A" % round(i.current, 1))
elif i.ac_voltage == 480:
notes.append("Max AC Current: %s A" % \
round(i.p_aco*1.0/i.ac_voltage/3**.5, 1))
else:
notes.append("Max AC Current: %s A" % \
round(i.p_aco*1.0/i.ac_voltage, 1))
#greater than 1 in parallel
if i.array.mcount() > 1:
notes.append("DC Operating Current: %s A" % \
round(i.array.i_mpp(), 1))
notes.append("DC Short Circuit Current: %s A" % \
round(i.array.i_sc(), 1))
#greater than 1 in series
if i.array.mcount() > 1:
notes.append("DC Operating Voltage: %s V" % \
round(i.array.v_dc(), 1))
notes.append("System Max DC Voltage: %s V" % \
round(i.array.v_max(mintemp), 1))
if i.array.v_max(mintemp) > 600:
logger.warning("WARNING: Array exceeds 600V DC")
notes.append("Pnom Ratio: %s" % \
round((i.array.p_max/i.p_aco), 2))
if (i.array.v_dc(twopercent_temp) * .9) < i.mppt_low:
logger.warning("WARNING: " \
"Array IV Knee drops out of Inverter range")
if (i.array.p_max/i.p_aco) < 1.1:
logger.warning("WARNING: Array potentially undersized")
notes.append("")
d_inverters.pop(i.model)
if i.array.v_max(mintemp) > a_max:
a_max = i.array.v_max(mintemp)
notes.append("Array Azimuth: %s Degrees" % system.azimuth)
notes.append("Array Tilt: %s Degrees" % system.tilt)
sols_9 = system.solstice(9)
sols_15 = system.solstice(15)
notes.append("December 21 9:00 AM Sun Azimuth: %s Degrees" % \
(round(degrees(sols_9[1]), 1)))
notes.append("December 21 9:00 AM Sun Altitude: %s Degrees" % \
(round(degrees(sols_9[0]), 1)))
notes.append("December 21 3:00 PM Sun Azimuth: %s Degrees" % \
(round(degrees(sols_15[1]), 1)))
notes.append("December 21 3:00 PM Sun Altitude: %s Degrees" % \
(round(degrees(sols_9[0]), 1)))
if 'geomag' in sys.modules:
notes.append("Magnetic declination: %s Degrees" % \
round(geomag.declination(dlat=system.place[0], \
dlon=system.place[1])))
notes.append("Minimum Row space ratio: %s" % \
round(system.min_row_space(1.0), 2))
if __name__ == '__main__':
print "\n".join(notes)
else:
logger.info("Plant Details:\n" + "\n".join(notes))
print ""
print "Minimum Bundle"
min_c = vd.vd(a_ac, 5, verbose=False)
try:
ee.assemble(min_c, a_ac, conduit='STEEL')
if run > 0:
print "Long Run"
min_c = vd.vd(a_ac, run, v=i.ac_voltage, t_amb=15, pf=.95, \
material='AL', verbose=False)
ee.assemble(min_c, a_ac, conduit='PVC')
except:
print "Warning: Multiple sets of conductors"
return notes
def string_notes(system, run=0.0, station_class=3):
"""page 5"""
name, usaf = geo.closest_usaf(geo.zip_coordinates(system.zipcode), \
station_class)
mintemp = eere.minimum(usaf)
twopercent_temp = eere.twopercent(usaf)
ac_kva_rated = 0.0
dc_rated = 0.0
ac_kw = 0.0
for i in system.shape:
dc_rated += i.array.p_max
try:
if i.phase == 1:
ac_kva_rated += i.current * i.ac_voltage
else:
ac_kva_rated += i.phase * i.current * i.ac_voltage / 3**.5
except Exception:
ac_kva_rated += i.p_aco
ac_kw += i.p_aco
notes = []
notes.append("%s KVA AC RATED" % round(ac_kva_rated / 1000.0, 2))
notes.append("%s KW AC RATED" % round(ac_kw / 1000.0, 2))
notes.append("%s KW DC RATED" % round(dc_rated / 1000.0, 2))
#BUG: This doesn't work for unbalanced 3 phase
if system.phase == 1:
a_ac = round(ac_kva_rated / i.ac_voltage, 1)
else:
a_ac = round(ac_kva_rated / i.ac_voltage / 3**.5, 1)
notes.append("System AC Output Current: %s A" % a_ac)
notes.append("Nominal AC Voltage: %s V" % i.ac_voltage)
notes.append("")
notes.append("Minimum Temperature: %s C" % mintemp)
notes.append("2 Percent Max Temperature: %s C" % twopercent_temp)
notes.append("Weather Source: %s %s" % (name, usaf))
notes.append("")
d_inverters, d_panels = system.describe()
a_max = 0
for i in system.shape:
module_name = i.array.dump()['panel']
if d_panels.has_key(module_name):
module = modules.Module(module_name)
notes.append("PV Module Ratings @ STC")
notes.append("Module Make: %s" % module.make)
notes.append("Module Model: %s" % module.model)
notes.append("Quantity: %s" % d_panels[module_name])
notes.append("Max Power-Point Current (Imp): %s A" % module.i_mpp)
notes.append("Max Power-Point Voltage (Vmp): %s V" % module.v_mpp)
notes.append("Open-Circuit Voltage (Voc): %s V" % module.v_oc)
notes.append("Short-Circuit Current (Isc): %s A" % module.i_sc)
notes.append("Maximum Power (Pmax): %s W" % round(module.p_max, 1))
notes.append("")
d_panels.pop(module_name)
if d_inverters.has_key(i.model):
notes.append("Inverter Make: %s" % i.make)
notes.append("Inverter Model: %s" % i.model)
notes.append("Quantity: %s" % d_inverters[i.model])
notes.append("Max Power: %s KW" % round(i.p_aco / 1000.0, 1))
#this is hack... This should be calculated based upon power cores
if hasattr(i, 'current'):
notes.append("Max AC Current: %s A" % round(i.current, 1))
elif i.ac_voltage == 480:
notes.append("Max AC Current: %s A" % \
round(i.p_aco*1.0/i.ac_voltage/3**.5, 1))
else:
notes.append("Max AC Current: %s A" % \
round(i.p_aco*1.0/i.ac_voltage, 1))
#greater than 1 in parallel
if i.array.mcount() > 1:
notes.append("DC Operating Current: %s A" % \
round(i.array.i_mpp(), 1))
notes.append("DC Short Circuit Current: %s A" % \
round(i.array.i_sc(), 1))
#greater than 1 in series
if i.array.mcount() > 1:
notes.append("DC Operating Voltage: %s V" % \
round(i.array.v_dc(), 1))
notes.append("System Max DC Voltage: %s V" % \
round(i.array.v_max(mintemp), 1))
if i.array.v_max(mintemp) > 600:
logger.warning("WARNING: Array exceeds 600V DC")
notes.append("Pnom Ratio: %s" % \
round((i.array.p_max/i.p_aco), 2))
if (i.array.v_dc(twopercent_temp) * .9) < i.mppt_low:
logger.warning("WARNING: " \
"Array IV Knee drops out of Inverter range")
if (i.array.p_max / i.p_aco) < 1.1:
logger.warning("WARNING: Array potentially undersized")
notes.append("")
d_inverters.pop(i.model)
if i.array.v_max(mintemp) > a_max:
a_max = i.array.v_max(mintemp)
notes.append("Array Azimuth: %s Degrees" % system.azimuth)
notes.append("Array Tilt: %s Degrees" % system.tilt)
sols_9 = system.solstice(9)
sols_15 = system.solstice(15)
notes.append("December 21 9:00 AM Sun Azimuth: %s Degrees" % \
(round(degrees(sols_9[1]), 1)))
notes.append("December 21 9:00 AM Sun Altitude: %s Degrees" % \
(round(degrees(sols_9[0]), 1)))
notes.append("December 21 3:00 PM Sun Azimuth: %s Degrees" % \
(round(degrees(sols_15[1]), 1)))
notes.append("December 21 3:00 PM Sun Altitude: %s Degrees" % \
(round(degrees(sols_9[0]), 1)))
if 'geomag' in sys.modules:
notes.append("Magnetic declination: %s Degrees" % \
round(geomag.declination(dlat=system.place[0], \
dlon=system.place[1])))
notes.append("Minimum Row space ratio: %s" % \
round(system.min_row_space(1.0), 2))
if __name__ == '__main__':
print "\n".join(notes)
else:
logger.info("Plant Details:\n" + "\n".join(notes))
print ""
print "Minimum Bundle"
min_c = vd.vd(a_ac, 5, verbose=False)
try:
ee.assemble(min_c, a_ac, conduit='STEEL')
if run > 0:
print "Long Run"
min_c = vd.vd(a_ac, run, v=i.ac_voltage, t_amb=15, pf=.95, \
material='AL', verbose=False)
ee.assemble(min_c, a_ac, conduit='PVC')
except:
print "Warning: Multiple sets of conductors"
return notes
def micro_calcs(system, drop, v_nominal=240):
"""page 4"""
print ""
print vd.vd(sum([i.p_aco for i in system.shape])/v_nominal, drop)
def micro_calcs(system, drop, v_nominal=240):
"""page 4"""
print ""
print vd.vd(sum([i.p_aco for i in system.shape]) / v_nominal, drop)