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synchronous and subsynchronous content of voltage and current
2

synchronous and subsynchronous content of voltage and current

synchronous and subsynchronous content of voltage and current

(OP)
what is synchronous and subsynchronous content of voltage and current?thank you

RE: synchronous and subsynchronous content of voltage and current

never heard the term subsynchronous before.

where did YOU hear it?

Can you copy the whole paragraph you took this word out of so there is more meat to work with here?

RE: synchronous and subsynchronous content of voltage and current

Do you mean "Subsynchronous Resonance"[SSR] phenomenon?
I saw –in the far past-a synchronous condenser[compensator] of 20/60 MVAR connected in medium voltage system through capacitors in order to delete the 40 MVA transformer reactance and to facilitate rapid compensation of a required reactive power on H.V. system.
A large induction motor connected in the Grid which stator winding was executed with q fractional [q=number of slots per pole and phase] produced a sub-harmonic EMF and a resonance was establish and the synchronous condenser was shut down. However, could be
other effects too. See for instance:
http://www.idc-online.com/technical_references/pdf...

RE: synchronous and subsynchronous content of voltage and current

The synchronous frequency is the fundamental frequency (usually 50 or 60 Hz) of your system. Sub-synchronous frequencies are those below the synchronous frequency. I work in a utility environment, the sub-synchronous frequencies that we see are usually due to generator governors or AVRs fighting, or resonances within the transmission system (often excited by faults).

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