how i can defined different bounds or fixed values to elements of a vector variable?

For example: l = [0,1,2] u = [1,2,3] @variable(m, l[i] <= x[i=1:3] <= u[i])

thanks for your answer,but, in this case Julia warning!@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) JuMP has been eliminated predefined variable values.

You’ll need to provide more information (minimal stand-alone code example, full output, expected behavior).

You put code in triple backticks (`) to make it easier to follow (or use Ctrl+Shift+C, or the preformatted text button at the top).

using JuMP PF = Model() #system MVA basebaseMVA = 100; # bus data # bus_i type Pd Qd Gs Bs area Vm Va baseKV zone Vmax Vmin bus = [ 1 3 0 0 0 0 1 1 0 345 1 1.1 0.9 2 2 0 0 0 0 1 1 0 345 1 1.1 0.9 3 2 0 0 0 0 1 1 0 345 1 1.1 0.9 4 1 0 0 0 0 1 1 0 345 1 1.1 0.9 5 1 90 30 0 0 1 1 0 345 1 1.1 0.9 6 1 0…

For the last 10 lines, you should use @constraint instead of @variable

I did this, but the solution was infeasible.

This is surprising. Could you give the code that gave you the infeasible solution ?

If you primary interest is to solve AC Power Flows you might want to have a look at PowerModels.jl as an example.

thanks for your response, but i wanted to solve own AC power flow to continue that to reach the solution of the “State Estimation” problem

JuMP variable definition

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JuMP variable definition

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