synchronous the generator excitation system The main function of:

One, the normal operation of power system, maintain generator voltage level at some point or system.When the generator reactive power load change, in general, voltage of the plane will have corresponding change, automatic excitation regulator should be able to at this time, the excitation power supply requirements meet different load cases, excitation current automatic adjustment, maintain the machine or system point voltage level.

Second, the reasonable allocation between the generator reactive power load.Reactive load of the generator and has close relation with the field current, field current automatic adjustment, to influence between the generator reactive power load distribution, so the adjustment characteristics of excitation system has certain requirements.

Three, in the power system short circuit fault occurs, according to the requirements of the forced excitation.

Fourth, improve power system stability.

Five, quick drop-out, when generator or step-up transformer internal fault, for quick drop-out, in order to reduce the fault caused by the damage.

Synchronous generator excitation method

A, dc generator power supply mode of excitation

Second, the ac exciter by rectifying power supply mode of excitation

Static current power supply mode of excitation.Field current is through exciting transformer, exciting current device from synchronous generator or external auxiliary current pattern in our end