Protection Engineering Basics and Schemes Protection Engineering | Page 184
5.7 Frequency Relay( 81):
Why frequency altered in any system, it is question with very simple answer,
We have three parts in any power system � Generation � Transmission � Distribution( Load Side) Let suppose we have below mention power system, Main reason of abnormality in frequency is due to Generation
and Distribution side alteration in supply and demand respectively.
At generator-source side mechanical torque is producing on generator torque and from load side electrical torque