ElmTr4 attributesPowerFactory 4-Winding Transformer

Read and write ElmTr4 in Python

import powerfactory

app = powerfactory.GetApplication()          # GetApplicationExt() from outside PowerFactory
app.GetFromStudyCase("ComLdf").Execute()      # results exist after a calculation

for trafo in app.GetCalcRelevantObjects("*.ElmTr4"):
    loading = trafo.GetAttribute("c:loading")     # Maximum Loading, %
    print(trafo.loc_name, loading)

trafo = app.GetCalcRelevantObjects("*.ElmTr4")[0]
trafo.SetAttribute("outserv", 1)              # take the transformer out of service

• A result at a terminal of the 4-winding transformer needs the terminal in its name: m:P:bush0, not m:P, which raises AttributeError.
• An input parameter is read and written with or without its e: prefix: GetAttribute("outserv") and GetAttribute("e:outserv") give the same value.
• RMS and EMT variables change over time: record them in a results object (ElmRes) to read the whole curve. GetAttribute after a run gives the value at the last time step.