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Isn't corona a volts/length (circumference) issue? At high voltages, you experience corona at shapes that change abruptly or small conductors.

Thanks electricpete and itsmoked for your thoughts. That makes sense. I just wondered because voltage drop certainly plays a big role when starting loads under "normal" conditions. I wondered if that was any different in a less rigid, smaller system.

On a similar note, I have a question regarding generator inertia. I know that for islanded (or backup) generation, generators must be larger than the largest motor loads which they must power. Obviously a 600hp generator cannot start a 500hp motor. When large loads come online, the power to...

I took the EIT last semester and, in the afternoon, took the general test as an EE. I found the morning section to be very easy (I got done in 1.5 hours out of 4 hours) and the afternoon to be extremely difficult (got out with not much time to spare). I recommend taking the specific exam if...

I know in an islanded system when load exceeds generation, the frequency will drop (due to generator droop characteristics) and make up for deficient generation. What happens when load exceeds the rating of an inverter or UPS when that is the only source of power? I know frequency would not...

Everyone, Thank you for your replies and great ideas. ScottyUK, you are probably right with the tap changer position. Now that I think about it, if the bus voltage metering were anything other than at the low side of the the GSU (I assume it is typically at the high side of the transformer, as...

If the generator goes online above voltage, it is exporting REACTIVE power. Conversely, if it is below voltage, it will consume reactive power, like old field guy said. I think the idea that we are thinking of is that if the generator is spinning faster (higher frequency) then it will be...

It seems that every generator at the utility that I work for has a different voltage that it must be at during synchronization. Some generators' startup procedure call for the terminal voltage to be less than the bus voltage, while others require that the terminal voltage be greater by a few...