Question

我正在尝试使用以下简单的示例代码连接两个带有在pyomo中实现的“Connector”类的块。

from pyomo.environ import *

m = ConcreteModel()

# Block 01
m.block_01 = Block()
m.block_01.flow = Var(within=NonNegativeReals, bounds=(2, 10))
m.block_01.OUT = Connector(initialize= {'flow': m.block_01.flow})

# Block 02
m.block_02 = Block()
m.block_02.flow = Var(within=NonNegativeReals)
m.block_02.IN = Connector(initialize= {'flow': m.block_02.flow})

m.con = Constraint(expr=m.block_01.OUT == m.block_02.IN)

def _obj(_m):
    return _m.block_01.flow + _m.block_02.flow
m.obj = Objective(rule=_obj)

在“优化”之后，所有变量都采用其下限值（m.block_01.flow = 2和m.block_02.flow = 0）。所以Connector似乎不会为变量传输任何数据。

如果我正在使用：

m.con = Constraint(expr=m.block_01.flow == m.block_02.flow)

相反，它的工作原理。然而，这不是连接器的想法，对吗？

关于问题原因的任何想法？

Answer 1

在将模型发送给求解器之前，您是否应用了expand_connectors转换？

TransformationFactory('core.expand_connectors').apply_to(m)

pyomo：块不连接的连接器

1 个答案: