def _setup_array(self) -> None:
"""
Setup the solar panel array within the grid as a Point per panel
"""
self.site = FlickerMismatch.get_turb_site(self.blade_length * 2)
self.site_points, self.heat_map_template = self._setup_heatmap_template(
self.site.bounds, self.gridcell_width, self.gridcell_height)
min_y, max_y = self.site.bounds[1], self.site.bounds[3]
string, string_points = create_pv_string_points(
0, min_y, self.gridcell_width, self.gridcell_height,
self.gridcell_width, max_y - min_y)
# where solar strings are
self.array = []
x_pos = self.site.bounds[0]
while x_pos < xs[-1]:
tmp_string = translate(string, x_pos, 0)
self.array.append(tmp_string)
x_pos += self.gridcell_width
logger.info("setup_turbines_and_arrays success")
# Create points centered on each module
self.array_string_points = []
x_pos = self.site.bounds[0]
while x_pos < xs[-1]:
array_points = translate(string_points, x_pos, 0)
self.array_string_points.append(
self._setup_string_points(array_points))
x_pos += self.gridcell_width
logger.info("setup_point_maps success")
def _setup_irradiance(self):
"""
Compute solar azimuth and elevation degrees;
Compute plane-of-array irradiance for a single-axis tracking PVwatts system
:return:
"""
pv_model = pv.default("PVWattsNone")
pv_model.SystemDesign.array_type = 2
pv_model.SystemDesign.gcr = .1
if self.solar_resource_data is None:
filename = str(self.lat) + "_" + str(
self.lon) + "_psmv3_60_2012.csv"
weather_path = Path(
__file__
).parent.parent.parent / "resource_files" / "solar" / filename
if not weather_path.is_file():
SolarResource(self.lat, self.lon, year=2012)
if not weather_path.is_file():
raise ValueError("resource file does not exist")
pv_model.SolarResource.solar_resource_file = str(weather_path)
else:
pv_model.SolarResource.solar_resource_data = self.solar_resource_data
pv_model.execute(0)
self.poa = np.array(pv_model.Outputs.poa)
logger.info("get_irradiance success")
def _setup_array(self) -> None:
"""
Setup the solar panel array as a Point per panel
"""
self.turb_pos = []
theta = np.radians(self.grid_angle)
# where the turbines are
self.turb_pos, self.site = create_turbines_in_grid(
self.turbine_dx, self.turbine_dy, theta,
FlickerMismatchGrid.n_turbines_per_side)
# find the center grid which is symmetrical to all inner grids
center_grid_coordinates = [(self.turb_pos[t][0], self.turb_pos[t][1])
for t in (5, 6, 10, 9)]
self.center_grid = Polygon(center_grid_coordinates)
self.site_points, self.heat_map_template = self._setup_heatmap_template(
self.center_grid.bounds)
# where solar strings are
string_width = module_width
string_height = self.center_grid.bounds[3] - self.center_grid.bounds[1]
y_pos = self.center_grid.bounds[1]
biggest_string_coordinates = ((0, y_pos), (string_width, y_pos),
(string_width, y_pos + string_height),
(0, y_pos + string_height))
biggest_string = Polygon(biggest_string_coordinates)
self.array = []
x_pos = self.center_grid.bounds[0]
while x_pos < self.center_grid.bounds[2]:
string = translate(biggest_string, x_pos, 0)
string = string.intersection(self.center_grid)
if string.area > 0:
self.array.append(string)
x_pos += string_width
logger.info("setup_turbines_and_arrays success")
# Create points centered on each module
self.array_string_points = []
for array in self.array:
array_points = self.site_points.intersection(
array.buffer(module_height / 4))
if array_points.is_empty:
continue
string_points = self._setup_string_points(array_points)
self.array_string_points.append(string_points)
logger.info("setup_point_maps success")
def run_parallel(self,
n_procs: int,
weight_option: tuple,
intervals: Optional[Sequence[range]] = None):
"""
Runs create_heat_maps_irradiance in parallel
:param n_procs:
:param weight_option: tuple of selected weighting options, producing a heatmap each
- "poa": weight by plane-of-array irradiance
- "power": weight by power loss of pvmismatch module
- "time": weight by number of timesteps shaded
:param intervals: list of ranges to simulate; if none, simulate entire weather file's records
:return: heat_map_shadow, heat_map_flicker
"""
logger.info("run_parallel with {} processes".format(n_procs))
pool = self._create_pool(n_procs)
if intervals is None:
intervals = self.step_intervals
if 'power' in weight_option or 'poa' in weight_option:
self._setup_irradiance()
results = pool.imap(
functools.partial(self.create_heat_maps,
weight_option=weight_option), intervals)
# aggregate results and renormalize
heat_maps_to_return = [
copy.deepcopy(self.heat_map_template[0]) for _ in weight_option
]
if 'power' in weight_option:
subhourly_poa = np.repeat(self.poa, FlickerMismatch.steps_per_hour)
total_poa = sum([sum(subhourly_poa[i]) for i in intervals])
total_steps = sum([len(i) for i in intervals])
for r, i in zip(results, intervals):
for j, hm in enumerate(heat_maps_to_return):
if weight_option[j] == 'poa':
hm += r[j] * sum(self.poa[i]) / total_poa
elif weight_option[j] == 'power' or weight_option[j] == 'time':
hm += r[j] * len(i) / total_steps
logger.info("Create_heat_map success")
return tuple(heat_maps_to_return)
def __init__(self,
lat: float,
lon: float,
turbine_nx: float,
turbine_ny: float,
angle: float = 0,
blade_length: int = 35,
angles_per_step: int = 1):
"""
:param lat: latitude
:param lon: longitude
:param turbine_nx: number of turbine diameters for horizontal spacing in grid
:param turbine_ny: number of turbine diameters for vertical spacing in grid
:param angle: degree of rotation for turbine grid
:param blade_length: meters
:param angles_per_step: number of blade angles per step of the hour
"""
FlickerMismatch.periodic = True
self.center_grid = None
self.turbine_dx = turbine_nx * blade_length * 2
self.turbine_dy = turbine_ny * blade_length * 2
self.grid_angle = int(angle) % 90
self.n_rows_modules = int(turbine_nx / (0.124 * 12))
super().__init__(lat,
lon,
blade_length=blade_length,
angles_per_step=angles_per_step)
self.filename_full = "{}_{}_{}_{}_{}_{}_{}".format(
self.lat, self.lon, self.steps_per_hour, self.angles_per_step,
self.turbine_dx, self.turbine_dy, self.grid_angle)
self.grid_turbine_shadow_file = Path(__file__).parent / "data" / str(
self.filename_full + "_shd.pkl")
logger.info(
"Creating FlickerMismatchModel with filename_full {}".format(
self.filename_full))
def create_heat_maps(
self,
steps: range,
weight_option: tuple,
) -> tuple:
"""
Create shadow and flicker heat maps for a given range of simulation steps
:param weight_option: tuple of selected weighting options, producing a heatmap each
- "poa": weight by plane-of-array irradiance
- "power": weight by power loss of pvmismatch module
- "time": weight by number of timesteps shaded
:param steps: which steps to run, must be within range calculated by steps_per_hour x angles_per_step
:return: shadow heat map, flicker heat map
"""
proc_id = mp.current_process().name
logger.info("Proc {}: Starting heat maps {}".format(proc_id, steps))
step_to_minute = 60 / self.steps_per_hour
self.azi_ang, self.elv_ang, _ = get_sun_pos(self.lat,
self.lon,
step_to_minute,
steps=steps)
self.turbine_shadow = get_turbine_shadows_timeseries(
self.blade_length, steps, self.angles_per_step, self.azi_ang,
self.elv_ang, self.wind_dir, FlickerMismatch.turbine_tower_shadow)
by_poa = by_power = by_time = False
for i in weight_option:
if i == "poa":
by_poa = True
heat_map_shadow = copy.deepcopy(self.heat_map_template[0])
elif i == "power":
by_power = True
heat_map_flicker = copy.deepcopy(self.heat_map_template[0])
elif i == "time":
by_time = True
heat_map_time = copy.deepcopy(self.heat_map_template[0])
else:
raise ValueError("Unrecognized 'weight_option'")
if not (by_poa or by_power or by_time):
raise ValueError(
"No valid 'weight_option' provided. Provide a list of selected ways to weight the shading "
"from the set ('poa', 'power', 'time')")
if by_poa or by_power:
if not isinstance(self.poa, Sequence):
self._setup_irradiance()
total_poa = sum(self.poa[steps])
progress_size = int(len(steps) / min(10, len(steps)))
for i, step in enumerate(steps):
if i % progress_size == 0:
logger.info(
"Proc {} created heat maps for {} / 100 steps".format(
proc_id, int(i / len(steps) * 100)))
hr = int(step / FlickerMismatch.steps_per_hour)
shadows = self._calculate_turbine_shadow(i)
if not shadows:
continue
if by_poa:
poa_weight = self.poa[hr] / total_poa
FlickerMismatch._calculate_shading(poa_weight, shadows,
self.site_points,
heat_map_shadow,
self.gridcell_width,
self.gridcell_height)
if by_power:
FlickerMismatch._calculate_power_loss(self.poa[hr],
self.elv_ang[i], shadows,
self.array_string_points,
heat_map_flicker,
self.gridcell_width,
self.gridcell_height)
if by_time:
FlickerMismatch._calculate_shading(1,
shadows,
self.site_points,
heat_map_time,
self.gridcell_width,
self.gridcell_height,
normalize_by_area=True)
# normalize by angles per hour (since each will use the same weight) or by number of hours total
step_normalize = self.angles_per_step if self.angles_per_step else 1
if by_poa:
heat_map_shadow /= step_normalize
if by_power:
heat_map_flicker /= step_normalize * len(steps)
if by_time:
heat_map_time /= step_normalize * len(steps)
heat_maps_to_return = []
for i in weight_option:
if i == 'poa':
heat_maps_to_return.append(heat_map_shadow)
elif i == 'power':
heat_maps_to_return.append(heat_map_flicker)
elif i == 'time':
heat_maps_to_return.append(heat_map_time)
logger.info("Finished heat maps")
return tuple(heat_maps_to_return)
