Hi Ray,Thanks for the explanation of ATC calculation.I have few questions
though, hope you can help explain.
Suppose I have a base case OPF solution already, now I want to figure out how
many MW can be transferred from BUS A to BUS B without violating any constraint
limits. A and B are general single buses and not necessary to be generator,
load. How to do it?
Besides power flow or OPF, is there any other way to solve ATC? such as using
shift factors, maybe?
why we need the base case at all?
thanksxiwen
On Thursday, 2 April 2015, 9:53, 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 generatorsga = find(ismember(mpc.gen(:, GEN_BUS), mpc.bus(a,
BUS_I))); % area A gensgb = find(ismember(mpc.gen(:, GEN_BUS), mpc.bus(b,
BUS_I))); % area B gensgother = find(~ismember((1:ng)', [ga; gb])); %
remaining gens
% fix dispatches of all gens outside areas A and Bmpc.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 dispatchr =
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
