Diesel Gen AVR

[Alms88]

Hi

Why there is no setting available in Diesel generator(any oem) (in my case size is 2000kva 415) AVR (any OEM) related to Capability curve of alternator ,
???

 

[waross]

That is not in the job description of an AVR.

Bill
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"Why not the best?"
Jimmy Carter

 

[Hoxton]

Sorry waross, but I beg to differ.

A basic AVR will control the voltage in single running mode and can control the voltage droop when in parallel mode.
In parallel mode there are two (of many) modes you do not want to enter:

Over excitation – excess field current can overheat the rotor.

Under excitation – low field current can result in the generator rotor not producing sufficient magnetism to hold the rotor in synchronism and it could ‘pole slip’.

There are AVRs with these features available – at a price. It does add to system complexity and these features are often not used in simpler applications.

This is a simple answer to what can become a complex area.

I suggest that the OP googles some of the terms in this response, and searches AVR manufacturer's websites (BASLER, Comap, Deep Sea etc)

 

[FreddyNurk]

Hoxton,

Note that ComAp, Deep Sea and so on don't manufacture AVRs, they manufacture controllers that interface with AVRs. Basler does make AVRs, although they are rarely fitted to sets of the size in question.
Strictly speaking the AVR's purpose is to manage field strength of the rotor to control voltage, which I would expect is what waross is implying. Smaller size AVRs do have overexcitation built in if I recall correctly, but its not user modifiable.

Basler's documentation on AVR operation is excellent, and probably worthwhile reading.
For this size of plant, other manufacturers are generally tied to the OEM for the specific alternator such as Cummins (Stamford), Mecc Alte, Leroy Somer and so on. Bigger generators will obviously have a lot more capability.

EDMS Australia