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transmission line synchronizing

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bigjoe

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hi there,

I have this question regarding interconnecting transmission line. In order for us to synchronize or connect in parallel two different system, they have to satisfy the condition same phase, same voltage and same frequency, although in reality they are not perfectly equal but approximately the same.
Question: what is the maximum voltage difference between the incoming source and of the other system so that they can be successfully link together? are there standard values or formula regarding that matter? for example the nominal voltage is 69kV, the grid has only 68.2kV and the incoming source is 69kV with that voltage difference, can they be successfully synchronize?

thanks in advance
 

Hi

I think you should use a PLL circuit adopted to work on high voltage - this way you can sync PHASE & FREQUENCY

Can't help you regarding high voltage usage

All the best

Bobi
 

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