def _change_status(self, from_status, to_status):
# Do we need to scale production on generators due to droop?
if len(self._scale_area):
scale_area = self._scale_area
else:
scale_area = MonsterPssPy.aareaint(-1, 1, 'NUMBER')[0]
# Get total load
try:
s_total = MonsterPssPy.loddt2(self.from_bus.number, self.identificator, 'TOTAL', 'ACT')
except PsseLoddtException as e:
if to_status == ComponentStatus.on and e._ierr == 4:
s_total = -e._value
else:
raise
if self.status() == to_status:
if to_status == ComponentStatus.off:
raise PsseBaseException('Load component already out of service.', None)
else:
raise PsseBaseException('Load component already in service.', None)
try:
MonsterPssPy.load_chng(
self.from_bus.number, self.identificator,
intgar1=to_status.get_index()
)
# Define SID for scale area
sid = 2
MonsterPssPy.bsys(sid, numarea=len(scale_area), areas=scale_area)
# Scale with (3) incremental powers, (0) ignore machine
# power limits, (0) No Q changes and (2) only type 2 and 3
# buses.
MonsterPssPy.scal(sid, 0, 0, [0, 0, 0, 2, 0], [0.0, -s_total.real] + [0.0] * 5)
except PsseBaseException:
raise
def get_pq(self):
""" Get PQ value from case as a complex value
"""
return MonsterPssPy.loddt2(self.from_bus.number, self.identificator, 'MVA', 'ACT')