What are the operational characteristics of the two alternators with the speed-droop curves shown in figure "A" of the illustration? EL-0025

Correct Answer: Option A — machine "A" is a droop machine, while machine"B" is an isochronous machine

Speed-droop characteristic curves illustrate governor response during parallel generator operation. A sloped droop curve indicates a droop machine designed for stable load sharing, whereas a flat, horizontal curve represents an isochronous machine holding constant frequency and absorbing system load fluctuations.