A Describe in general terms how a synchronus machine can eit

A. Describe in general terms how a synchronus machine can either source or sink vars to the power grid in terms of machine elements such as rotor and stator ?

B. Name at least three shunt elements which can increase the voltage in a power system ?

Solution

a) Based on level of excitation synchronus machine acts as source or sink of VAR. That is over excited synchronus motor can be act as synchronus condenser means that synchronus machine acts as source(reactive power supplier) of VAR .And remaining other conditions acts as sink of VAR.

b)static capacitors, synchronus condensers, phase advancers