Electrical Power Systems Technology

212 Electrical Power Systems Technology

lines, or “bus” lines, are usually large, copper bar conductors that can carry
very high amounts of current. At low-load demand times, only one alter-
nator would be connected to the bus lines.
Figure 8-4 expands the concept of parallel-connected systems. An il-
lustration of two power plants joined together through a distribution sub-
station is shown. The two power plants might be located 100 miles apart,

Figure 8-2. Construction of a cryogenic cable

Figure 8-3. Parallel connection of two three-phase alternators