[BUG] Incorrect voltage source impedance for 4 wire networks

[hei06j]

Voltage source impedance matrix for 4-wire is different from how OpenDSS uses. We believe this bug does not impact 3 wire networks.

OpenDSS does [zs zm zm zm ; zm zs zm zm ; zm zm zs zm ; zm zm zm zs],
whereas PMD does [zs zm zm 0 ; zm zs zm 0 ; zm zm zs 0 ; 0 0 0 0],
zm is mutual impedance and zs is self impedance.

using PowerModelsDistribution
path = joinpath(dirname(pathof(PowerModelsDistribution)), "..")
case_file = joinpath(path, "test/data/en_validation_case_data/test_load_3ph_delta_ci.dss")
eng = PowerModelsDistribution.parse_file(case_file, transformations=[transform_loops!])
@show eng["voltage_source"]["source"]["rs"]
@show eng["voltage_source"]["source"]["xs"]

Expected behavior
reference implementation
https://github.com/tshort/OpenDSS/blob/5005c668a72d20775f4c2d060feebb2866ba1d38/Source/PCElements/VSource.pas#L757

System Information (please complete the following information):

• MacOS
• Version [e.g. 12.0.1]

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.