def test_mpp_floats():
"""test max_power_point"""
IL, I0, Rs, Rsh, nNsVth = (7, 6e-7, .1, 20, .5)
out = pvsystem.max_power_point(IL, I0, Rs, Rsh, nNsVth, method='brentq')
expected = {
'i_mp': 6.1362673597376753, # 6.1390251797935704, lambertw
'v_mp': 6.2243393757884284, # 6.221535886625464, lambertw
'p_mp': 38.194210547580511
} # 38.194165464983037} lambertw
assert isinstance(out, dict)
for k, v in out.items():
assert np.isclose(v, expected[k])
out = pvsystem.max_power_point(IL, I0, Rs, Rsh, nNsVth, method='newton')
for k, v in out.items():
assert np.isclose(v, expected[k])
def test_mpp_array():
"""test max_power_point"""
IL, I0, Rs, Rsh, nNsVth = (np.array([7, 7]), 6e-7, .1, 20, .5)
out = pvsystem.max_power_point(IL, I0, Rs, Rsh, nNsVth, method='brentq')
expected = {
'i_mp': [6.1362673597376753] * 2,
'v_mp': [6.2243393757884284] * 2,
'p_mp': [38.194210547580511] * 2
}
assert isinstance(out, dict)
for k, v in out.items():
assert np.allclose(v, expected[k])
out = pvsystem.max_power_point(IL, I0, Rs, Rsh, nNsVth, method='newton')
for k, v in out.items():
assert np.allclose(v, expected[k])
def test_mpp_series():
"""test max_power_point"""
idx = ['2008-02-17T11:30:00-0800', '2008-02-17T12:30:00-0800']
IL, I0, Rs, Rsh, nNsVth = (np.array([7, 7]), 6e-7, .1, 20, .5)
IL = pd.Series(IL, index=idx)
out = pvsystem.max_power_point(IL, I0, Rs, Rsh, nNsVth, method='brentq')
expected = pd.DataFrame(
{
'i_mp': [6.1362673597376753] * 2,
'v_mp': [6.2243393757884284] * 2,
'p_mp': [38.194210547580511] * 2
},
index=idx)
assert isinstance(out, pd.DataFrame)
for k, v in out.items():
assert np.allclose(v, expected[k])
out = pvsystem.max_power_point(IL, I0, Rs, Rsh, nNsVth, method='newton')
for k, v in out.items():
assert np.allclose(v, expected[k])
from typing import OrderedDict
from pvlib import pvsystem
import pandas as pd
import matplotlib.pyplot as plt
info = pvsystem.max_power_point(photocurrent=4,
saturation_current=.0000000000001,
resistance_series=2,
resistance_shunt=1,
nNsVth=152.8,
d2mutau=0.00020833,
method='newton')
for k, v in info.items():
print(k, v)