# how can powerfactor of an alternators improved??????????????

Home Electrical Engineering Forum General Discussion how can powerfactor of an alternators improved??????????????

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• #10205
Keymaster

if new method u know then plz send msg me.plz…………..dears………

#11361
electricalexpert65
Participant

By connecting Automatic Power Factor Correction Scheme

#11464
Keymaster

akhilesh said:

if new method u know then plz send msg me.plz…………..dears………

to decrease excitation voltage of the alternater

#11436
Keymaster

akhilesh said:

if new method u know then plz send msg me.plz…………..dears………

Power factor is that of the load & not of the alternator.Therfore there is no question to improve the pf of the altertnator. Off course the power factor at which the alternator is feeding the load can be improved by reducing the RMVA loading of the alternator.

#11556
Keymaster

Guys…that are two different things.

example,

Generator set with 0.8 power factor mean:

alternator unit will be in kVA with engine unit will be in kW with factor 0.8 (not the alternator)

at the load side, power factor is kW/kVA which is a composite of power factor

the composite power factor at the load side are possible to be corrected but generator (set) power factor cannot be corrected unless by changing the engine capacity or alternator capacity.

hope the above could helps you

#11568
Keymaster

vilas said:

akhilesh said:

if new method u know then plz send msg me.plz…………..dears………

Power factor is that of the load & not of the alternator.Therfore there is no question to improve the pf of the altertnator. Off course the power factor at which the alternator is feeding the load can be improved by reducing the RMVA loading of the alternator.

such lame understanding of electrical engineering principles, if not, utterly stupid….

#11582
Keymaster

“Power factor is that of the load & not of the alternator” is right. In an islanded situation (standalone generation system) , the alternator must supply power at a power level and a power factor dependant on the load. The alternator can’t do anything else. Power factor correction in this instance will improve the load power factor (and hence reduce alternator ine current).

If however the alternator is operated in parallel with the grid, power factor of the alternator can be changed by changing alternator excitation (assuming it is a synchronous alternator).

#11591
Keymaster

JohnB said:

“Power factor is that of the load & not of the alternator” is right. In an islanded situation (standalone generation system) , the alternator must supply power at a power level and a power factor dependant on the load. The alternator can’t do anything else. Power factor correction in this instance will improve the load power factor (and hence reduce alternator ine current).

If however the alternator is operated in parallel with the grid, power factor of the alternator can be changed by changing alternator excitation (assuming it is a synchronous alternator).

As power factor is ratio of active power to apparant power(KW/KVA) AND active power & reactive component is contolled by alternator feed fuel system and excitation control,hence by controlling these two we can control power factor of load and alternator.

#12266
s
Participant

Power factor concept is applicable on loads not sources

#12279
Spir Georges GHALI
Participant

Dear ;

If we talk about the ” Power Fcator ” of loads, we can improve it only by using a ” Capacitors bank “, but as the inrush current of capacitor is too big, we should be careful if there's in the capacitors bank a big step or big steps.

By the way, the changing of the engine's full system and the alternator's exitation doesn't chang at all the power factor of the loads, because the load's power factor is depending on the specifications of the load itself.

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