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Thank you all.Comments have been very informing.

The restrict earth fault on my unit transformer 169MVA 161kv has been operating any time there is fault in the Grid. On one of the disturbance records , it was observed the polarity of the High side CT and neutral CT were the same. Am tempted to reverse the polarity of the Neutral CT. I would...

rcwilson i appreciate your explanation , i will still be interested in the effects due to MVAR/Voltage/Load interactions that are occurring, i want to really understand this , any links will also be appreciated.

Thank you again, I guessed so initially too, what baffles me is during off peak periods the drop is very small,and the slightest increase in MWARs result in a significant change in system voltage, however during peak periods the drop turns be very big. Any reason for this?

Thanks for the information,the other explanation i needed is , why do I normally achieve high voltages on the generator side but on the system the voltage still remains low, for example usually for the current tap position 14.4/161kv i achieve 15kv but the system voltage is still low about...

I run a power station with generator rating 110MW 0.8 pf, 14.4KV which is connected to the grid at 161KV through a 165MVA 14.4/161kv transformer and synchronize at 14.4kv. During peak hours the corridor experiences low voltages although we try to keep up our vars to improve voltages the system...