Y bus mismatch vs. PSS(e) on modified WECC 240 case

[luke-kiernan]

For the attached raw file, there's significant mismatches between our Y bus matrix and PSS(e)'s. For starters, PSS(e)'s Y bus only has 50 buses; ours has 243 buses. Probably something network reduction related?

The .raw file: WECC240_v04_DPV_RE20_v33_6302_xfmr_DPbuscode_PFadjusted_V32_noRemoteVctrl.raw.txt

Script for exporting PSS(e)'s Y bus to CSV: export_ybus.ipynb

The resulting CSV: PF_WECC_240_case.csv

Script for comparing the contents of that CSV to PNM's Y bus: ybus-compare-WECC-240.jl.txt

[luke-kiernan]

In particular, take a look at the export script. Is there a simple way tell PSS(e) to leave the network topology alone?

edit: It seems not. ChatGPT claims that there's psspy.system_cleanup(0) in v35+ and psspy.nocleanup(1) in v33-34, but neither of those options worked for me. It says you can read in the raw data with readrawversion(iversion, infile, 1)...but if you ask PSS(e) to to build an admittance out of that data, it'll cleanup the topology first.