In that context, either of the two options I mentioned should work just fine.

    Ray


> On Oct 30, 2018, at 11:59 AM, Winnie apiyo <[email protected]> wrote:
> 
> I have a base case and I am evaluating the transmission system demand for a 
> period of 10 years and increasing load for the ten years. Of course, I have 
> to install new generators as per the system demand. am just running power 
> flow, not OPF. In the current period, the generation is just enough for what 
> is in place.
> regards
> 
> On Tue, Oct 30, 2018 at 3:07 PM Ray Zimmerman <[email protected] 
> <mailto:[email protected]>> wrote:
> It’s hard to say without understanding your problem formulation. If you are 
> solving a sequence of single-period problems (e.g power flow or OPF), then 
> you have two options. Either (1) include all generators in your base case, 
> but with some of them turned off (GEN_STATUS column set to 0), and enable 
> them manually as needed as you proceed through your simulation. Or (2) modify 
> the case by adding rows to the gen and gencost matrices as you proceed. If 
> you are solving a multi-period model using MOST, then you’ll have to use 
> option (1) and include all of the generators in MOST but force some to be off 
> in periods where you don’t want them to be available.
> 
>    Ray
> 
>> On Oct 30, 2018, at 7:03 AM, Winnie apiyo <[email protected] 
>> <mailto:[email protected]>> wrote:
>> 
>> Good evening,
>> How do you add generation/generators in steps as the system load increases
>> in a period of time?
>> regards
> 

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