ETAP error 101-01 - Bus base kV is 40% different from Nominal kV

[Mongao]

Hi all,

I am now using ETAP for the second time in my life, so I am not really used to it. I have added some busses to an existing system, but when I try to solve the flow ETAP gives me this message, saying that many busses base voltages differ more than 40% from the nominal voltages.

The nominal voltages I have to type in, the base voltages are calculated by ETAP starting from the swing bus (read this on the help file) using the transformers ratios; what happens is that the message appears already for the swing bus itself ! That means that all system busses have this problem as the software can't even pass the first one. I have made the bus nominal voltage equal to the swing generator voltage, but the problem persists.

Please, has anyone experienced this problem ?

Thanks a lot,

Mongao

 

[mgtrp]

It means exactly what it says it means. Usually because you've entered the voltage wrong for some of your buses, or else some of your transformers.

 

[Mongao]

ETAP help file says that, starting from the swing bus, it calculates internally the base kV for each bus based on transformer ratios.

I have figured out that ETAP includes the swing bus itself in this error message, which means that it doesn't even pass it, it tries to start calculating busses base kV's but doesn't go beyond the very first one.

So, it is clear that I have set something wrong with this bus or any equipment connected to it, however I have investigated a lot and couldn't find it.

Please, has anyone experienced this ?

Thanks a lot,

 

[Desrod2]

Check if your transformers are correctly connected (HV to HV and LV to LV) specially at generators. Did you entered your voltage as LG instead of LL?
Have you called ETAP support? They will probably look at your file and give you a quick answer.

 

[dpc]

Also check kV vs Volts

 

[Mongao]

Yes.....yes.....I got the file from someone else that had set 4160 kV for the generators, of course it's 4.16 kV. The error has disappeared, thanks to everybody that helped !