hello, I decided to implement Power Flow problem in julia, but while i cannot been determined the variable because when i defined, a set of special type of busess active powers(or other variables), the previously defined active powers are eliminated. @variable(PF, P[i=1:nGen; bus[:,2][i] == 2] == gen[:,2][i]/baseMVA) @variable(PF, P[i=1:nBus; bus[:,2][i] == 1] == -bus[:,3][i]/baseMVA) can you help me? You received this message because you are subscribed to the Google Groups "julia-opt" group. To unsubscribe from this group and stop receiving emails from it, send an email to [hidden email]. Visit this group at https://groups.google.com/group/julia-opt. For more options, visit https://groups.google.com/d/optout. |
Hi,
-- I can see two options, 1) Precompute a p_delta for each bus, which is the sum of generator output and bus load. Then post KCL for each bus of the form, for i in buses @constraint(p_delta[i] == sum{ p[(i,j)] for (i,j) in bus_edges[i] }) end 2) Break up your p values into demands and generation, then you can post, for i in buses @constraint(p_gen[i] - p_load[i] == sum{ p[(i,j)] for (i,j) in bus_edges[i] }) end Depending on your use case, you might also consider using PowerModels.jl It supports both AC and DC power flow computations. Cheers, -Carleton On Tuesday, December 6, 2016 at 10:35:46 AM UTC-7, [hidden email] wrote:
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thanks for your help
-- On Wednesday, December 7, 2016 at 4:26:50 AM UTC+3:30, Carleton Coffrin wrote:
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In reply to this post by ar.shefaei
Repeated definition of a variable with the same name will generate a warning in the next release of JuMP.
-- On Tuesday, December 6, 2016 at 12:35:46 PM UTC-5, [hidden email] wrote:
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how i can defined different bounds or fixed values to elements of a vector variable?
-- On Sunday, December 11, 2016 at 6:02:15 AM UTC+3:30, Miles Lubin wrote:
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