/
solve.py
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/
solve.py
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"""
Power systems optimization problem solver
for ED, OPF, UC, and SCUC problems. The :mod:`solve`
module contains the top-level commands for creating
problems and solving them.
"""
import traceback
import sys
import os
import logging
import subprocess
import time as timer
import argparse
import pdb
from config import user_config, parse_command_line_config
from commonscripts import joindir, StreamToLogger
import powersystems
import get_data
import stochastic
import results
from standalone import store_times, init_store, get_storage, repack_storage
def _set_store_filename(pid=None):
fnm = 'stage-store.hd5'
if user_config.output_prefix or user_config.pid:
fnm = '{}-{}'.format(pid, fnm)
user_config.store_filename = joindir(user_config.directory, fnm)
def solve_multistage_standalone(power_system, times, scenario_tree, data):
stage_times = times.subdivide(
user_config.hours_commitment, user_config.hours_overlap)
pid = user_config.pid if user_config.pid else os.getpid()
has_pid = user_config.output_prefix or user_config.pid
if user_config.standalone_restart:
# get the last stage in storage
storage = get_storage()
stg_start = len(storage['solve_time'].dropna())
logging.info('Restarting on stage {}'.format(stg_start))
stage_times_remaining = stage_times[stg_start:]
else:
storage = init_store(power_system, stage_times, data)
stage_times_remaining = stage_times
stg_start = 0
for stg, t_stage in enumerate(stage_times_remaining):
logging.info('Stage starting at {}'.format(t_stage.Start.date()))
# store current stage times
storage = store_times(t_stage, storage)
storage.close()
storage = None
command = 'standalone_minpower {dir} {stg} {pid} {db}'.format(
dir=user_config.directory, stg=stg + stg_start,
pid='--pid {}'.format(pid) if has_pid else '',
db='--debugger' if user_config.debugger else '')
try:
subprocess.check_call(command, shell=True, stdout=sys.stdout)
except AttributeError:
# HACK - avoid error when nose hijacks sys.stdout
subprocess.check_call(command, shell=True)
repack_storage()
storage = get_storage()
return storage, stage_times
def standaloneUC():
'''the hook for the ``standalone_minpower`` script'''
from standalone import store_state, load_state
parser = argparse.ArgumentParser()
parser.add_argument('directory', type=str, help='the problem direcory')
parser.add_argument('stg', type=int, help='the stage number')
parser.add_argument('--pid', default='',
help='the process id of the parent')
parser.add_argument('--debugger', action='store_true', default=False,
help='do some debugging')
args = parser.parse_args()
stg = args.stg
user_config.directory = args.directory
user_config.pid = args.pid
try:
_set_store_filename(args.pid)
# load stage data
power_system, times, scenario_tree = load_state()
# override the stored config with the current command line config
user_config.directory = args.directory
user_config.debugger = args.debugger
_setup_logging(args.pid)
sln = create_solve_problem(power_system, times, scenario_tree, stage_number=stg)
store = store_state(power_system, times, sln)
store.close()
except:
if user_config.debugger or args.debugger:
__, __, tb = sys.exc_info()
traceback.print_exc()
pdb.post_mortem(tb)
else:
raise
return
def solve_problem(datadir='.',
shell=True,
problemfile=False,
csv=True,
):
"""
Solve a optimization problem specified by spreadsheets in a directory.
Read in data, create and solve the problem, and return solution.
The problem type is determined by the data.
All options are set within `user_config`.
"""
user_config.directory = datadir
pid = user_config.pid if user_config.pid else os.getpid()
_set_store_filename(pid)
_setup_logging(pid)
if user_config.standalone_restart:
store = get_storage()
debugger = user_config.debugger # preserve debugger state
user_config.update(store['configuration'])
user_config.debugger = debugger
user_config.standalone_restart = True # preserve restart state
store.close()
logging.debug(dict(user_config))
start_time = timer.time()
logging.debug('Minpower reading {}'.format(datadir))
generators, loads, lines, times, scenario_tree, data = get_data.parsedir()
logging.debug('data read')
power_system = powersystems.PowerSystem(generators, loads, lines)
logging.debug('power system initialized')
if times.spanhrs <= user_config.hours_commitment + user_config.hours_overlap:
solution = create_solve_problem(power_system, times, scenario_tree)
else: # split into multiple stages and solve
if user_config.standalone:
stage_solutions, stage_times = solve_multistage_standalone(
power_system, times, scenario_tree, data)
else:
stage_solutions, stage_times = solve_multistage(
power_system, times, scenario_tree, data)
solution = results.make_multistage_solution(
power_system, stage_times, stage_solutions)
if shell:
if user_config.output_prefix or user_config.pid:
stdout = sys.stdout
sys.stdout = StreamToLogger()
solution.show()
sys.stdout = stdout
solution.show()
if csv and not user_config.standalone:
solution.saveCSV()
if user_config.visualization:
solution.visualization()
logging.info('total time: {}s'.format(timer.time() - start_time))
if user_config.on_complete_script:
os.system(user_config.on_complete_script)
return solution
def solve_multistage(power_system, times, scenario_tree=None, data=None):
stage_times = times.subdivide(
user_config.hours_commitment, user_config.hours_overlap)
stage_solutions = []
for stg, t_stage in enumerate(stage_times):
logging.info('Stage starting at {}'.format(t_stage.Start.date()))
# solve
solution = create_solve_problem(
power_system, t_stage, scenario_tree, stg)
# add to stage solutions
stage_solutions.append(solution)
# reset model
power_system.reset_model()
# set inital state for next stage
if stg < len(stage_times) - 1:
power_system.set_initialconditions(stage_times[stg + 1].initialTime)
return stage_solutions, stage_times
def create_solve_problem(power_system, times, scenario_tree=None,
stage_number=None, rerun=False):
'''create and solve an optimization problem.'''
create_problem(power_system, times, scenario_tree,
stage_number, rerun)
instance = power_system.solve_problem(times)
logging.debug('solved... get results')
sln = results.make_solution(power_system, times)
power_system.disallow_shedding()
# resolve with observed power and fixed status
if sln.is_stochastic:
power_system.resolve_stochastic_with_observed(instance, sln)
elif user_config.deterministic_solve or user_config.perfect_solve:
power_system.resolve_determinisitc_with_observed(sln)
if len(times) > 1:
power_system.get_finalconditions(sln)
power_system.disallow_shedding()
sln.stage_number = stage_number
return sln
def create_problem(power_system, times, scenario_tree=None,
stage_number=None, rerun=False):
"""Create an optimization problem."""
logging.debug('initialized problem')
power_system.create_variables(times)
logging.debug('created variables')
power_system.create_objective(times)
logging.debug('created objective')
power_system.create_constraints(times)
logging.debug('created constraints')
if scenario_tree is not None and sum(scenario_tree.shape) > 0 and not rerun:
stochastic.construct_simple_scenario_tree(
power_system, times, time_stage=stage_number)
stochastic.define_stage_variables(power_system, times)
stochastic.create_problem_with_scenarios(power_system, times)
return
def _setup_logging(pid=None):
''' set up the logging to report on the status'''
kwds = dict(
level=int(user_config.logging_level) if not user_config.debugger else logging.DEBUG,
datefmt='%Y-%m-%d %H:%M:%S',
format='%(asctime)s %(levelname)s: %(message)s')
# log to file if pid is set, unless in debugging mode
if (user_config.output_prefix or user_config.pid) \
and not user_config.debugger:
kwds['filename'] = joindir(user_config.directory,
'{}.log'.format(pid))
if (user_config.logging_level > 10) and ('filename' not in kwds):
# don't log the time if debugging isn't turned on
kwds['format'] = '%(levelname)s: %(message)s'
logging.basicConfig(**kwds)
def main():
'''
The command line interface for minpower. For more info use:
``minpower --help``
'''
args = parse_command_line_config(
argparse.ArgumentParser(description='Minpower command line interface'))
directory = user_config.directory
if not os.path.isdir(directory):
msg = 'There is no folder named "{}".'.format(directory)
raise OSError(msg)
if args['profile']:
print 'run profile'
import cProfile
prof = cProfile.Profile()
prof.runcall(solve_problem, directory)
prof.dump_stats('minpower.profile')
else:
# solve the problem with those arguments
try:
solve_problem(directory)
except:
if args['debugger']:
__, __, tb = sys.exc_info()
traceback.print_exc()
pdb.post_mortem(tb)
else:
raise
# for use in dev
if __name__ == '__main__':
main()