def run_multi_island(self, numerical_circuit, calculation_inputs, Vbus, Sbus, Ibus):
"""
Power flow execution for optimization purposes
Args:
numerical_circuit:
calculation_inputs:
Vbus:
Sbus:
Ibus:
Returns: PowerFlowResults instance
"""
n = len(self.grid.buses)
m = len(self.grid.branches)
results = PowerFlowResults()
results.initialize(n, m)
if len(numerical_circuit.islands) > 1:
# simulate each island and merge the results
for i, calculation_input in enumerate(calculation_inputs):
if len(calculation_input.ref) > 0:
bus_original_idx = numerical_circuit.islands[i]
branch_original_idx = numerical_circuit.island_branches[i]
# run circuit power flow
res = self.run_pf(calculation_input,
Vbus[bus_original_idx],
Sbus[bus_original_idx],
Ibus[bus_original_idx])
# merge the results from this island
results.apply_from_island(res, bus_original_idx, branch_original_idx)
else:
warn('There are no slack nodes in the island ' + str(i))
self.logger.append('There are no slack nodes in the island ' + str(i))
else:
# run circuit power flow
results = self.run_pf(calculation_inputs[0], Vbus, Sbus, Ibus)
return results
def run_multi_thread(self):
"""
Run the monte carlo simulation
@return:
"""
self.__cancel__ = False
# initialize the grid time series results
# we will append the island results with another function
self.circuit.time_series_results = TimeSeriesResults(0, 0, 0, 0, 0)
Sbase = self.circuit.Sbase
n_cores = multiprocessing.cpu_count()
it = 0
variance_sum = 0.0
std_dev_progress = 0
v_variance = 0
n = len(self.circuit.buses)
m = len(self.circuit.branches)
mc_results = MonteCarloResults(n, m)
avg_res = PowerFlowResults()
avg_res.initialize(n, m)
# compile circuits
numerical_circuit = self.circuit.compile()
numerical_input_islands = numerical_circuit.compute()
v_sum = zeros(n, dtype=complex)
self.progress_signal.emit(0.0)
while (std_dev_progress <
100.0) and (it < self.max_mc_iter) and not self.__cancel__:
self.progress_text.emit('Running Monte Carlo: Variance: ' +
str(v_variance))
mc_results = MonteCarloResults(n, m, self.batch_size)
# For every circuit, run the time series
for numerical_island in numerical_input_islands:
# set the time series as sampled
monte_carlo_input = make_monte_carlo_input(numerical_island)
mc_time_series = monte_carlo_input(self.batch_size,
use_latin_hypercube=False)
Vbus = numerical_island.Vbus
manager = multiprocessing.Manager()
return_dict = manager.dict()
# short cut the indices
b_idx = numerical_island.original_bus_idx
br_idx = numerical_island.original_branch_idx
t = 0
while t < self.batch_size and not self.__cancel__:
k = 0
jobs = list()
# launch only n_cores jobs at the time
while k < n_cores + 2 and (t + k) < self.batch_size:
# set the power values
Y, I, S = mc_time_series.get_at(t)
# run power flow at the circuit
p = multiprocessing.Process(
target=power_flow_worker,
args=(t, self.options, numerical_island, Vbus,
S / Sbase, I / Sbase, return_dict))
jobs.append(p)
p.start()
k += 1
t += 1
# wait for all jobs to complete
for proc in jobs:
proc.join()
# progress = ((t + 1) / self.batch_size) * 100
# self.progress_signal.emit(progress)
# collect results
self.progress_text.emit('Collecting batch results...')
for t in return_dict.keys():
# store circuit results at the time index 't'
res = return_dict[t]
mc_results.S_points[
t, numerical_island.original_bus_idx] = res.Sbus
mc_results.V_points[
t, numerical_island.original_bus_idx] = res.voltage
mc_results.I_points[
t, numerical_island.original_branch_idx] = res.Ibranch
mc_results.loading_points[
t, numerical_island.original_branch_idx] = res.loading
mc_results.losses_points[
t, numerical_island.original_branch_idx] = res.losses
# compile MC results
self.progress_text.emit('Compiling results...')
mc_results.compile()
# compute the island branch results
island_avg_res = numerical_island.compute_branch_results(
mc_results.voltage[b_idx])
# apply the island averaged results
avg_res.apply_from_island(island_avg_res,
b_idx=b_idx,
br_idx=br_idx)
# Compute the Monte Carlo values
it += self.batch_size
mc_results.append_batch(mc_results)
v_sum += mc_results.get_voltage_sum()
v_avg = v_sum / it
v_variance = abs(
(power(mc_results.V_points - v_avg, 2.0) / (it - 1)).min())
# progress
variance_sum += v_variance
err = variance_sum / it
if err == 0:
err = 1e-200 # to avoid division by zeros
mc_results.error_series.append(err)
# emmit the progress signal
std_dev_progress = 100 * self.mc_tol / err
if std_dev_progress > 100:
std_dev_progress = 100
self.progress_signal.emit(
max((std_dev_progress, it / self.max_mc_iter * 100)))
# print(iter, '/', max_mc_iter)
# print('Vmc:', Vavg)
# print('Vstd:', Vvariance, ' -> ', std_dev_progress, ' %')
# compute the averaged branch magnitudes
mc_results.sbranch = avg_res.Sbranch
mc_results.losses = avg_res.losses
# print('V mc: ', mc_results.voltage)
# send the finnish signal
self.progress_signal.emit(0.0)
self.progress_text.emit('Done!')
self.done_signal.emit()
return mc_results
def run_single_thread(self):
"""
Run the monte carlo simulation
@return:
"""
# print('LHS run')
self.__cancel__ = False
# initialize the power flow
power_flow = PowerFlowMP(self.circuit, self.options)
# initialize the grid time series results
# we will append the island results with another function
self.circuit.time_series_results = TimeSeriesResults(0, 0, 0, 0, 0)
batch_size = self.sampling_points
n = len(self.circuit.buses)
m = len(self.circuit.branches)
self.progress_signal.emit(0.0)
self.progress_text.emit('Running Latin Hypercube Sampling...')
lhs_results = MonteCarloResults(n, m, batch_size)
avg_res = PowerFlowResults()
avg_res.initialize(n, m)
# compile the numerical circuit
numerical_circuit = self.circuit.compile()
numerical_input_islands = numerical_circuit.compute()
max_iter = batch_size * len(numerical_input_islands)
Sbase = numerical_circuit.Sbase
it = 0
# For every circuit, run the time series
for numerical_island in numerical_input_islands:
# try:
# set the time series as sampled in the circuit
# build the inputs
monte_carlo_input = make_monte_carlo_input(numerical_island)
mc_time_series = monte_carlo_input(batch_size,
use_latin_hypercube=True)
Vbus = numerical_island.Vbus
# short cut the indices
b_idx = numerical_island.original_bus_idx
br_idx = numerical_island.original_branch_idx
# run the time series
for t in range(batch_size):
# set the power values from a Monte carlo point at 't'
Y, I, S = mc_time_series.get_at(t)
# Run the set monte carlo point at 't'
res = power_flow.run_pf(circuit=numerical_island,
Vbus=Vbus,
Sbus=S / Sbase,
Ibus=I / Sbase)
# Gather the results
lhs_results.S_points[
t, numerical_island.original_bus_idx] = res.Sbus
lhs_results.V_points[
t, numerical_island.original_bus_idx] = res.voltage
lhs_results.I_points[
t, numerical_island.original_branch_idx] = res.Ibranch
lhs_results.loading_points[
t, numerical_island.original_branch_idx] = res.loading
lhs_results.losses_points[
t, numerical_island.original_branch_idx] = res.losses
it += 1
self.progress_signal.emit(it / max_iter * 100)
if self.__cancel__:
break
if self.__cancel__:
break
# compile MC results
self.progress_text.emit('Compiling results...')
lhs_results.compile()
# compute the island branch results
island_avg_res = numerical_island.compute_branch_results(
lhs_results.voltage[b_idx])
# apply the island averaged results
avg_res.apply_from_island(island_avg_res,
b_idx=b_idx,
br_idx=br_idx)
# lhs_results the averaged branch magnitudes
lhs_results.sbranch = avg_res.Sbranch
# Ibranch = avg_res.Ibranch
# loading = avg_res.loading
# lhs_results.losses = avg_res.losses
# flow_direction = avg_res.flow_direction
# Sbus = avg_res.Sbus
self.results = lhs_results
# send the finnish signal
self.progress_signal.emit(0.0)
self.progress_text.emit('Done!')
self.done_signal.emit()
return lhs_results
def run_multi_thread(self):
"""
Run the monte carlo simulation
@return:
"""
# print('LHS run')
self.__cancel__ = False
# initialize vars
batch_size = self.sampling_points
n = len(self.circuit.buses)
m = len(self.circuit.branches)
n_cores = multiprocessing.cpu_count()
self.progress_signal.emit(0.0)
self.progress_text.emit(
'Running Latin Hypercube Sampling in parallel using ' +
str(n_cores) + ' cores ...')
lhs_results = MonteCarloResults(n, m, batch_size)
avg_res = PowerFlowResults()
avg_res.initialize(n, m)
# compile
# print('Compiling...', end='')
numerical_circuit = self.circuit.compile()
numerical_islands = numerical_circuit.compute()
max_iter = batch_size * len(numerical_islands)
Sbase = self.circuit.Sbase
it = 0
# For every circuit, run the time series
for numerical_island in numerical_islands:
# try:
# set the time series as sampled in the circuit
monte_carlo_input = make_monte_carlo_input(numerical_island)
mc_time_series = monte_carlo_input(batch_size,
use_latin_hypercube=True)
Vbus = numerical_island.Vbus
# short cut the indices
b_idx = numerical_island.original_bus_idx
br_idx = numerical_island.original_branch_idx
manager = multiprocessing.Manager()
return_dict = manager.dict()
t = 0
while t < batch_size and not self.__cancel__:
k = 0
jobs = list()
# launch only n_cores jobs at the time
while k < n_cores + 2 and (t + k) < batch_size:
# set the power values
Y, I, S = mc_time_series.get_at(t)
# run power flow at the circuit
p = multiprocessing.Process(
target=power_flow_worker,
args=(t, self.options, numerical_island, Vbus,
S / Sbase, I / Sbase, return_dict))
jobs.append(p)
p.start()
k += 1
t += 1
# wait for all jobs to complete
for proc in jobs:
proc.join()
progress = ((t + 1) / batch_size) * 100
self.progress_signal.emit(progress)
# collect results
self.progress_text.emit('Collecting results...')
for t in return_dict.keys():
# store circuit results at the time index 't'
res = return_dict[t]
lhs_results.S_points[
t, numerical_island.original_bus_idx] = res.Sbus
lhs_results.V_points[
t, numerical_island.original_bus_idx] = res.voltage
lhs_results.I_points[
t, numerical_island.original_branch_idx] = res.Ibranch
lhs_results.loading_points[
t, numerical_island.original_branch_idx] = res.loading
lhs_results.losses_points[
t, numerical_island.original_branch_idx] = res.losses
# except Exception as ex:
# print(c.name, ex)
if self.__cancel__:
break
# compile MC results
self.progress_text.emit('Compiling results...')
lhs_results.compile()
# compute the island branch results
island_avg_res = numerical_island.compute_branch_results(
lhs_results.voltage[b_idx])
# apply the island averaged results
avg_res.apply_from_island(island_avg_res,
b_idx=b_idx,
br_idx=br_idx)
# lhs_results the averaged branch magnitudes
lhs_results.sbranch = avg_res.Sbranch
lhs_results.losses = avg_res.losses
self.results = lhs_results
# send the finnish signal
self.progress_signal.emit(0.0)
self.progress_text.emit('Done!')
self.done_signal.emit()
return lhs_results
def run_single_thread(self):
"""
Run the monte carlo simulation
@return:
"""
self.__cancel__ = False
# initialize the power flow
power_flow = PowerFlowMP(self.circuit, self.options)
# initialize the grid time series results
# we will append the island results with another function
self.circuit.time_series_results = TimeSeriesResults(0, 0, 0, 0, 0)
Sbase = self.circuit.Sbase
it = 0
variance_sum = 0.0
std_dev_progress = 0
v_variance = 0
n = len(self.circuit.buses)
m = len(self.circuit.branches)
# compile circuits
numerical_circuit = self.circuit.compile()
numerical_input_islands = numerical_circuit.compute()
mc_results = MonteCarloResults(n, m)
avg_res = PowerFlowResults()
avg_res.initialize(n, m)
v_sum = zeros(n, dtype=complex)
self.progress_signal.emit(0.0)
while (std_dev_progress <
100.0) and (it < self.max_mc_iter) and not self.__cancel__:
self.progress_text.emit('Running Monte Carlo: Variance: ' +
str(v_variance))
mc_results = MonteCarloResults(n, m, self.batch_size)
# For every circuit, run the time series
for numerical_island in numerical_input_islands:
# set the time series as sampled
monte_carlo_input = make_monte_carlo_input(numerical_island)
mc_time_series = monte_carlo_input(self.batch_size,
use_latin_hypercube=False)
Vbus = numerical_island.Vbus
# run the time series
for t in range(self.batch_size):
# set the power values
Y, I, S = mc_time_series.get_at(t)
# res = powerflow.run_at(t, mc=True)
res = power_flow.run_pf(circuit=numerical_island,
Vbus=Vbus,
Sbus=S / Sbase,
Ibus=I / Sbase)
mc_results.S_points[
t, numerical_island.original_bus_idx] = res.Sbus
mc_results.V_points[
t, numerical_island.original_bus_idx] = res.voltage
mc_results.I_points[
t, numerical_island.original_branch_idx] = res.Ibranch
mc_results.loading_points[
t, numerical_island.original_branch_idx] = res.loading
mc_results.losses_points[
t, numerical_island.original_branch_idx] = res.losses
# short cut the indices
b_idx = numerical_island.original_bus_idx
br_idx = numerical_island.original_branch_idx
self.progress_text.emit('Compiling results...')
mc_results.compile()
# compute the island branch results
island_avg_res = numerical_island.compute_branch_results(
mc_results.voltage[b_idx])
# apply the island averaged results
avg_res.apply_from_island(island_avg_res,
b_idx=b_idx,
br_idx=br_idx)
# Compute the Monte Carlo values
it += self.batch_size
mc_results.append_batch(mc_results)
v_sum += mc_results.get_voltage_sum()
v_avg = v_sum / it
v_variance = abs(
(power(mc_results.V_points - v_avg, 2.0) / (it - 1)).min())
# progress
variance_sum += v_variance
err = variance_sum / it
if err == 0:
err = 1e-200 # to avoid division by zeros
mc_results.error_series.append(err)
# emmit the progress signal
std_dev_progress = 100 * self.mc_tol / err
if std_dev_progress > 100:
std_dev_progress = 100
self.progress_signal.emit(
max((std_dev_progress, it / self.max_mc_iter * 100)))
# print(iter, '/', max_mc_iter)
# print('Vmc:', Vavg)
# print('Vstd:', Vvariance, ' -> ', std_dev_progress, ' %')
# compile results
mc_results.sbranch = avg_res.Sbranch
# mc_results.losses = avg_res.losses
# send the finnish signal
self.progress_signal.emit(0.0)
self.progress_text.emit('Done!')
self.done_signal.emit()
return mc_results
def run(self, store_in_island=False):
"""
Pack run_pf for the QThread
:return:
"""
# print('PowerFlow at ', self.grid.name)
n = len(self.grid.buses)
m = len(self.grid.branches)
results = PowerFlowResults()
results.initialize(n, m)
# self.progress_signal.emit(0.0)
Sbase = self.grid.Sbase
# columns of the report
col = ['Method', 'Converged?', 'Error', 'Elapsed (s)', 'Iterations']
self.convergence_reports.clear()
print('Compiling...', end='')
numerical_circuit = self.grid.compile()
calculation_inputs = numerical_circuit.compute()
if len(numerical_circuit.islands) > 1:
# simulate each island and merge the results
for i, calculation_input in enumerate(calculation_inputs):
if len(calculation_input.ref) > 0:
Vbus = calculation_input.Vbus
Sbus = calculation_input.Sbus
Ibus = calculation_input.Ibus
# run circuit power flow
res = self.run_pf(calculation_input, Vbus, Sbus, Ibus)
bus_original_idx = numerical_circuit.islands[i]
branch_original_idx = numerical_circuit.island_branches[i]
# merge the results from this island
results.apply_from_island(res, bus_original_idx, branch_original_idx)
# build the report
data = np.c_[results.methods[i],
results.converged[i],
results.error[i],
results.elapsed[i],
results.inner_iterations[i]]
df = pd.DataFrame(data, columns=col)
self.convergence_reports.append(df)
else:
warn('There are no slack nodes in the island ' + str(i))
self.logger.append('There are no slack nodes in the island ' + str(i))
else:
# only one island
Vbus = calculation_inputs[0].Vbus
Sbus = calculation_inputs[0].Sbus
Ibus = calculation_inputs[0].Ibus
# run circuit power flow
results = self.run_pf(calculation_inputs[0], Vbus, Sbus, Ibus)
# build the report
data = np.c_[results.methods[0],
results.converged[0],
results.error[0],
results.elapsed[0],
results.inner_iterations[0]]
df = pd.DataFrame(data, columns=col)
self.convergence_reports.append(df)
self.last_V = results.voltage # done inside single_power_flow
# check the limits
sum_dev = results.check_limits(F=numerical_circuit.F, T=numerical_circuit.T,
Vmax=numerical_circuit.Vmax, Vmin=numerical_circuit.Vmin,
wo=1, wv1=1, wv2=1)
self.results = results
return self.results