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Hi guys,

I have a raw file which contains over 20000 synchronous generating units and has over 100 000 buses. The raw file is like really really big (like half of USA or Europe).

I should run dynamic simulations (tripping lines & generating units as well as bus/line faults, thus analyzing the voltage and rotor angle stability as well as measuring like 15 critical clearing times) in an power system area which is only a small part of the wide-area system and contains approximately 100 gen. units for which I have a good data for a fine tuning of the GENROU/GENSAL, HYGOV/TGOV1/GAST, SEXS/SCRX models of generators, turbine governors and excitation systems, respectively. The dynamic simulations and the units of interest are only limiter to the area I described above.

My questions are:

1. What data in the dyr should I provide for the generators that are not a topic of interest and will not be analysed? (I don't even have enough data for them to be properly modelled) Maybe GENCLS with a classical H=3, D=0, or maybe, model them as infinity bus by setting H=0, D=0.

2. Should I just leave such units without any dynamic models? Does that automatically mean that PSS-E will treat them as a negative load (of course represented by I-Y Norton equvivalent).

Thank you very much!

Kind regards,

Alex

Hi guys,

I have a raw file which contains over 20000 synchronous generating units and has over 100 000 buses. The raw file is like really really big (like half of USA or Europe).

I should run dynamic simulations (tripping lines & generating units as well as bus/line faults, thus analyzing the voltage and rotor angle stability as well as measuring like 15 critical clearing times) in an power system area which is only a small part of the wide-area system and contains approximately 100 gen. units for which I have a good data for a fine tuning of the GENROU/GENSAL, HYGOV/TGOV1/GAST, SEXS/SCRX models of generators, turbine governors and excitation systems, respectively. The dynamic simulations and the units of interest are only limiter limited to the area I described above.

My questions are:

1. What data in the dyr should I provide for the generators that are not a topic of interest and will not be analysed? (I don't even have enough data for them to be properly modelled) Maybe GENCLS with a classical H=3, D=0, or maybe, model them as infinity bus by setting H=0, D=0.

2. Should I just leave such units without any dynamic models? Does that automatically mean that PSS-E will treat them as a negative load (of course represented by I-Y Norton equvivalent).

Thank you very much!

Kind regards,

Alex