Parallel Running of Alternators
Ernest J. Berg · Transactions of the American Institute of Electrical Engineers · 1901
In the following article an endeavor will be made to show the principles govering parallel operation of alternators, driven by steam engines or turbines.The laws of parallel running when generators are driven by electric motors depend so much upon the action of the mnotors that this part of the subject is omitted and reserved for another paper.Consider two alternators intended for parallel operation, and let:e induced E. M. F. Z,7Z2 'r22-02 = the initernal imnpedance of the different armiatures.Y1 and Y2 = the corresponding admittances.Z = r-j x the impedance of the external load.YB= joint admittance of the armature circuits.Z= corresponding impedanee.Zo -total impedance in the circuit.We h-ave tben:Z2 Z121-Jf =¾ -+ 2 .