Environmental Engineering Reference
In-Depth Information
stochastically as a result of demand-time variation, and is also a function of dis-
tance and conductor impedance. These issues are illustrated in Figures 4.6 and 4.7.
The higher voltage network is assumed stiff (in the limit an infinite busbar),
thus the voltage profile in the lower voltage network must change direction around
this fixed voltage as a result of a change in power flow direction.
Stiff
voltage
busbar
1.06
Allowable
voltage range
1.0
0.94
Load distance (MW km)
Figure 4.6
Network design voltage profile without embedded generation
(maximum load minimum generation scenario)
Stiff
voltage
busbar
Power flow
1.06
Allowable
voltage range
0.94
Load distance (MW km)
Figure 4.7
Network voltage profile with tail-end embedded generation (minimum
load maximum generation scenario)
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