A synchronous generator when under excited provides reactive power to grid..but then why generators are run in synchronous condenser mode instead underexcited to supply reactive power??
One simple answer is that carrying reactive power on transmission lines is just a waste of the capacity of the transmission lines.
That is why utilities provide incentives to (typically large) customers who take steps to reduce the kvars being carried on their transmission lines.
Customers do this by adding capacitors local to the loads, so that kvars used by the loads are supplied by local capacitors and not carried over transmission lines.
I couldn;t get u excalty,,my ques is why ae prefer synchronous condenser mode to under excited generator when reactive power is required to be fed to grid,,leave away incentives..
There is no benefit to generating kvars remotely and transmitting them using up the capacity of transmission lines. It is better to "generate" (not the right word) kvars locally using capacitors. For a given amount of load, you can use smaller transmission lines (generally), which cost less.
look sir, i think im mistaken..synchronous condensor mode is generator operation as a motor in overexcited mode. let me put it in this way.." Y we prefer generator operation as a over-excited motor rather than under-excited generator operation to supply reactive power to grid"..hope now u can clarify me in a abetter way
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