def test_power_tracking_perturbed(power_tracking, solarposition):
"""A day with perturbed values is not marked as tracking."""
power_tracking.iloc[6:18] = 10
expected = pd.Series(True, index=power_tracking.index)
expected.iloc[0:24] = False
assert_series_equal(
expected,
orientation.tracking_nrel(power_tracking,
solarposition['zenith'] < 87))
assert_series_equal(
expected,
orientation.tracking_nrel(power_tracking,
solarposition['zenith'] < 87,
peak_min=100))
def test_power_tracking_old_pvlib(power_tracking_old_pvlib, solarposition):
"""simulated power from a single axis tracker is identified as sunny
with tracking=True"""
# copy of `test_power_tracking` but with older pvlib API
# TODO: remove when minimum pvlib version is >= 0.9.0
assert orientation.tracking_nrel(power_tracking_old_pvlib,
solarposition['zenith'] < 87).all()
def test_power_tracking_perturbed_old_pvlib(power_tracking_old_pvlib,
solarposition):
"""A day with perturbed values is not marked as tracking."""
# copy of `test_power_tracking_perturbed` but with older pvlib API
# TODO: remove when minimum pvlib version is >= 0.9.0
power_tracking_old_pvlib.iloc[6:18] = 10
expected = pd.Series(True, index=power_tracking_old_pvlib.index)
expected.iloc[0:24] = False
assert_series_equal(
expected,
orientation.tracking_nrel(power_tracking_old_pvlib,
solarposition['zenith'] < 87))
assert_series_equal(
expected,
orientation.tracking_nrel(power_tracking_old_pvlib,
solarposition['zenith'] < 87,
peak_min=100))
def test_stuck_tracker_profile(solarposition, clearsky):
"""Test POA irradiance at a awkward orientation (high tilt and
oriented West)."""
poa = irradiance.get_total_irradiance(
surface_tilt=45,
surface_azimuth=270,
**clearsky,
solar_zenith=solarposition['apparent_zenith'],
solar_azimuth=solarposition['azimuth'])
assert not orientation.tracking_nrel(
poa['poa_global'],
solarposition['zenith'] < 87,
).any()
# by restricting the data to the middle of the day (lower zenith
# angles) we should classify the system as fixed
assert orientation.fixed_nrel(poa['poa_global'],
solarposition['zenith'] < 70).all()
def test_power_tracking(power_tracking, solarposition):
"""simulated power from a single axis tracker is identified as sunny
with tracking=True"""
assert orientation.tracking_nrel(power_tracking,
solarposition['zenith'] < 87).all()
def test_ghi_not_tracking(clearsky, solarposition):
"""If we pass GHI measurements and tracking=True then no days are sunny."""
assert (~orientation.tracking_nrel(clearsky['ghi'],
solarposition['zenith'] < 87)).all()