Looking for formula for net vars

[rian0201]

There is certainly a power meter at the high side- but it is a revenue meter owned by the utility, Commonwealth Edison in our case, which is off limits to us. I am a generator, so all of our metering is on the low side as to look at the gross values at our generator. We don't have access to the high side metering because it is off property at ComEd's switchyard many miles away. There is a caveat to that- we do have metering on the high side for bus voltage and frequency, which is used for synchronization. We also have current signals from ComEd for differential to our protection relays, but unfortunately, our relays are old, and do not have readouts that show values.

These days generators are isolated as much as possible so the evil Russians can't hack our plants...

I see, who owns the step-up transformer? And why do you need the vars at the high side of the transformer? I see that you need to do reactive testing, what is the connection to the high side vars?

i am asking this question since if you do not own the transformer, then why bother calculating the high side var? How is it related to reactive testing?

 

[Sahib]

One thing that I guess from -ve MVAR of your generator is it is motoring and not generating!