Hi Ray,
Yes, that helps sir. It is concise enough that I’ll add that to the preamble of my cases. Thanks again to you, Carlos, and Uriel for jump starting me. with best regards, Russ From: [email protected] [mailto:[email protected]] On Behalf Of Ray Daniel Zimmerman Sent: Thursday, December 10, 2020 10:25 AM To: MATPOWER-L Subject: Re: infinite bus, 1 branch/1 gen As Carlos has said, for historical reasons, the format used by MATPOWER mixes fixed system parameters with input data for initializing the problem and output data for reporting the problem solution. While the details of which items are in which category are probably not summarized explicitly anywhere, the problem formulations (for power flow, OPF, etc) should give an indication of what to expect. In any case, here’s an attempt to summarize: Starting point: - bus(:, VM) and bus(:, VA) provide the initial bus voltages, except for generator buses (type REF and PV) where the magnitude is pulled from a corresponding gen(:, VG). - gen(:, PG) and gen(:, QG) provide the initial generator injections - Note 1 : bus(:, VA) is fixed at the input value for the REF bus. - Note 2: : The bus voltage magnitudes are fixed at the input value for REF and PV buses for the power flow problem, but not for the OPF problem (unless requested via opf.use_vg option). - Note 3 : The active power generation is fixed at the input value for PV buses for the power flow problem, but not for the OPF problem. Output: - bus(:, VM) and bus(:, VA) provide the solved bus voltages - gen(:, PG) and gen(:, QG) provide the solved generator injections Hope this helps, Ray
