This the error by giving scale_load()
scale_load('case4arunmod.m')
Error using scale_load (line 119)
Not enough input arguments.
how to fixed the load at given bus and how to change the PD column in the
bus matrix
On Tue, Apr 28, 2015 at 2:13 PM, Ray Zimmerman <[email protected]> wrote:
> See scale_load()
> <http://www.pserc.cornell.edu//matpower/docs/ref/matpower5.1/scale_load.html>.
> Or if it’s a simple fixed load at a given bus, just change the value of the
> PD column in the bus matrix.
>
> Ray
>
>
>
> On Apr 28, 2015, at 4:55 AM, Aruna Dharmala <[email protected]>
> wrote:
>
> Dear all,
> For available transfer capability calculations i have
> to increase load(sink) at single bus and check the system performance
> by increasing load if their is any voilation in line
> limit that is taken as TTC candidate
> can you please suggest code for increasing load at
> single bus that can implement in matpower
> please help
>
> On Mon, Apr 6, 2015 at 1:07 PM, Ray Zimmerman <[email protected]> wrote:
>
>> I’m not sure I understand what you want to do. You could certainly create
>> a new function with the appropriate inputs and outputs, that wraps the code
>> below and use it to compute ATC.
>>
>> Ray
>>
>>
>> On Apr 6, 2015, at 1:06 AM, Aruna Dharmala <[email protected]>
>> wrote:
>>
>> Respected sir,
>> how to add the given below program to existing
>> inbuilt opf code in matpower software.....?
>> % get indices of generators
>> ga = find(ismember(mpc.gen(:, GEN_BUS), mpc.bus(a, BUS_I))); % area A
>> gens
>> gb = find(ismember(mpc.gen(:, GEN_BUS), mpc.bus(b, BUS_I))); % area B
>> gens
>> gother = find(~ismember((1:ng)', [ga; gb])); % remaining gens
>>
>> % fix dispatches of all gens outside areas A and B
>> mpc.gen(gother, PMIN) = mpc.gen(gother, PG);
>> mpc.gen(gother, PMAX) = mpc.gen(gother, PG);
>>
>> % scale down prices in area A by factor of 10
>> % scale up prices in area B by factor of 10
>> % (important thing is to make everything in A cheaper than
>> % everything in B to maximize transfer from A to B)
>> mpc.gencost(ga, :) = modcost(mpc.gencost(ga, :), 0.1);
>> mpc.gencost(gb, :) = modcost(mpc.gencost(gb, :), 10);
>>
>> % re-run the OPF and compute ATC as total decrease in area B dispatch
>> r = runopf(mpc);
>> ATC = sum(mpc.gen(gb, PG)) - sum(r.gen(gb, PG));
>>
>>
>> On Thu, Apr 2, 2015 at 1:52 PM, Ray Zimmerman <[email protected]> wrote:
>>
>>> I’ll assume you have a base case power flow (or OPF) solution in a
>>> MATPOWER case struct mpc and want to find the maximum additional power
>>> that can be transferred from area A to area B without violating
>>> constraints, where the areas are defined via two vectors of bus indices (
>>> a and b), possibly by using a = find(mpc.bus(:, BUS_AREA) == A), etc.
>>> Then you’ll just modify the case, something like this …
>>>
>>> % get indices of generators
>>> ga = find(ismember(mpc.gen(:, GEN_BUS), mpc.bus(a, BUS_I))); % area A
>>> gens
>>> gb = find(ismember(mpc.gen(:, GEN_BUS), mpc.bus(b, BUS_I))); % area B
>>> gens
>>> gother = find(~ismember((1:ng)', [ga; gb])); % remaining gens
>>>
>>> % fix dispatches of all gens outside areas A and B
>>> mpc.gen(gother, PMIN) = mpc.gen(gother, PG);
>>> mpc.gen(gother, PMAX) = mpc.gen(gother, PG);
>>>
>>> % scale down prices in area A by factor of 10
>>> % scale up prices in area B by factor of 10
>>> % (important thing is to make everything in A cheaper than
>>> % everything in B to maximize transfer from A to B)
>>> mpc.gencost(ga, :) = modcost(mpc.gencost(ga, :), 0.1);
>>> mpc.gencost(gb, :) = modcost(mpc.gencost(gb, :), 10);
>>>
>>> % re-run the OPF and compute ATC as total decrease in area B dispatch
>>> r = runopf(mpc);
>>> ATC = sum(mpc.gen(gb, PG)) - sum(r.gen(gb, PG));
>>>
>>> Hope this helps,
>>>
>>> Ray
>>>
>>>
>>> On Apr 2, 2015, at 12:10 AM, Aruna Dharmala <[email protected]>
>>> wrote:
>>>
>>> Respected sir,
>>> I am doing ATC computation by optimal power
>>> flow method..
>>> By using matpower software i run the load flow
>>> solution by optimal power flow.by doing load flow i am not geting how
>>> to take a group of buses as an area and how to interface between areas for
>>> available transfer capability calculation..?
>>>
>>> On Wed, Apr 1, 2015 at 6:34 PM, Ray Zimmerman <[email protected]> wrote:
>>>
>>>> Another possible approach is to use an OPF and shift the prices down
>>>> for the sending group of generators and up for the receiving group.
>>>>
>>>> Ray
>>>>
>>>>
>>>> On Apr 1, 2015, at 8:02 AM, Abhyankar, Shrirang G. <[email protected]>
>>>> wrote:
>>>>
>>>> Although Matpower does not have a function for ATC, it has all the
>>>> required building blocks for doing the calculations You can take a look at
>>>> the continuation power flow feature in the MatPower manual as a starting
>>>> point.
>>>>
>>>> Shri
>>>>
>>>> On Apr 1, 2015, at 5:07 AM, "Aruna Dharmala" <
>>>> [email protected]> wrote:
>>>>
>>>> Respected sir,
>>>> can we do available transfer capability
>>>> calculation using matpower it is possible..?
>>>> if it possible in this software how the
>>>> interfacing between two areas of available transfer capability takes place
>>>> for group of buses
>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
>
