ADVANTAGES AND DISADVANTAGES 39 



Disadvantages: 



1. Tendency of synchronous machines to drop out of 

 step. 



2. Possible large accidental variations in voltage. 



3. Increase in short-circuit current, unless reactance 

 is increased. 



4. Decrease in reserve, due to fewer lines. 



5. Higher total cost for short, high- voltage lines. 



6. Lower efficiency. 



