Is it possible a multiperiod optimization using pyomo network?

[Juan David Baquero Barrios]

Hi, I hope you can help me to solve this optimization problem:

Is it possible to work pyomo network with multiperiod optimization, I am trying to propose a renewable network with process optimization, however it was not possible for me to define correctly the ports.  Is possible to declare it on IDAES?

Firstly I declared a block with certain variables for the whole m.date, afterward (here comes the issue) I am trying to declare an extensive port (because I am splitting the stream later in the problem), but it is not possible for me to define correctly the port, here is the code:

This is what I am doing:
`m.date = Set(initialize=output.index, ordered = True) # is a 120 periods time`

#block of 3 variables:
```
def  block_fx_CSP (m,t):
    m.area_fxCSP = Var(within = NonNegativeReals, doc = '# area fixed CSP')
    m.fxCSP = Var(within = NonNegativeReals, doc = 'Canadian Solar fixed PV (W)')
    m.y_fxCSP = Var (domain = Binary)
m.fxCSP_block = Block (m.date, rule = block_fx_CSP)
```

**#1st attempt.** I declared the port as follows but the output is a list of the same first period date variable:

```
for t in m.date:
    m.port_fxCSP = Port(m.date, initialize=[(m.fxCSP_block[t].fxCSP, Port.Extensive)])
```

this is the output and it is not correct:

    Key                 : Name  : Size : Variable
    2019-12-31 19:00:00 : fxCSP :    1 : fxCSP_block[2019-12-31 19:00:00].fxCSP
    2019-12-31 20:00:00 : fxCSP :    1 : fxCSP_block[2019-12-31 19:00:00].fxCSP
    2019-12-31 21:00:00 : fxCSP :    1 : fxCSP_block[2019-12-31 19:00:00].fxCSP
    2019-12-31 22:00:00 : fxCSP :    1 : fxCSP_block[2019-12-31 19:00:00].fxCSP

The output should be:
    2019-12-31 19:00:00 : fxCSP :    1 : fxCSP_block[2019-12-31 19:00:00].fxCSP
    2019-12-31 20:00:00 : fxCSP :    1 : fxCSP_block[2019-12-31 20:00:00].fxCSP
    2019-12-31 21:00:00 : fxCSP :    1 : fxCSP_block[2019-12-31 21:00:00].fxCSP
    2019-12-31 22:00:00 : fxCSP :    1 : fxCSP_block[2019-12-31 22:00:00].fxCSP

**#2nd attempt:** I declared the port and later the function add, but it replaces all the data therefore the output is a 1 output size port:

```
m.port_fxCSP = Port()

for t in m.date:
    m.port_fxCSP.add(m.fxCSP_block[t].fxCSP, Port.Extensive)
```

Output:
port_fxCSP : Size=1, Index=None
    Key  : Name                                            : Size : Variable
    None : <function Port.Extensive at 0x00000165C26A65F0> :    1 : fxCSP_block[2020-01-05 18:00:00].fxCSP

**#3rd attempt:** I declare a function for the port for each m.date as an iterable, however the error indicates not iterable

```
def port_fxCSP (m,t):
    return [(m.fxCSP_block[t].fxCSP, Port.Extensive)for t in m.date]

m.fxCSP_port = Port (m.date, initialize=port_fxCSP)
```

TypeError: 'function' object is not iterable

Any suggestions are highly appreciated!