ADD: Transformer SOC relaxations #412
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Codecov Report
@@ Coverage Diff @@
## main #412 +/- ##
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+ Coverage 71.34% 71.61% +0.27%
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Files 59 59
Lines 15090 15189 +99
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+ Hits 10766 10878 +112
+ Misses 4324 4311 -13
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pseudocubic
added
Type: Enhancement
| va = LinearAlgebra.pinv(t)*[atan(bus["Wi"][2,1], bus["Wr"][2,1]); | ||
| atan(bus["Wi"][3,1], bus["Wr"][3,1]); | ||
| atan(bus["Wi"][3,2], bus["Wr"][3,2])] | ||
| bus["va"] = [va[findmin(abs.(va .- 0))[2]], |
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I'm not sure it matters here, but the convential angle rotation order is phase a - 0 degrees, b -120 degrees, c -240=+120 degrees
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That is correct. It looks like va could have multiple solutions since it is being calculated using off-diagonals of Wr and Wi (which only have information about angle differences). Without lines 82-84, the angles don't seem to follow conventional order of (0,-120deg, 120deg).
| \end{align} | ||
| ``` | ||
| """ | ||
| function constraint_mc_transformer_power_dy(pm::SOCUBFModels, nw::Int, trans_id::Int, f_bus::Int, t_bus::Int, f_idx::Tuple{Int,Int,Int}, t_idx::Tuple{Int,Int,Int}, f_connections::Vector{Int}, t_connections::Vector{Int}, pol::Int, tm_set::Vector{<:Real}, tm_fixed::Vector{Bool}, tm_scale::Real) |
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the alternative is to use the code path for the n-winding transformer decomposition, and do lifting to SW separately for the idealized single-phase transformer component (i.e. the wye model) and the internal losses (composable of normal branches/shunts in the SW variable space).
This PR adds (wye-wye and delta-wye) transformer SOC relaxations used by SOCNLPUBFPowerModel and SOCConicUBFPowerModel formulations.
CC @frederikgeth