Environmental Engineering Reference
In-Depth Information
TABLE 1.2
Histogram of Ramp Events on Current System, Current
System plus 480 MW at Peetz Site
(
Peetz +
)
and Current
System plus 480 MW at Goblers
Knob East (Goblers
+)
System
of
Interest
Current
Peetz+
Goblers+
Ramp(MW/hr)
Number
of
Events
-1500
0
1
0
-1400
0
1
0
-1300
0
1
0
-1200
0
3
0
-1100
1
2
1
-1000
0
2
0
-900
2
17
5
-800
2
30
14
-700
26
50
42
-600
72
93
89
-500
178
204
195
-400
317
313
337
-300
434
463
420
-200
603
631
655
-100
1010
991
1032
0
1666
1466
1500
100
1632
1517
1537
200
1083
1060
1081
300
769
788
804
400
472
497
481
500
284
321
301
600
146
175
173
700
44
68
56
800
13
33
26
900
5
15
9
1000
1
9
0
1100
0
5
1
1200
0
1
1
1300
0
1
0
1400
0
2
0
1500
0
0
0
Figure 1.4 displays three probability density curves representing the 2006
current, Peetz, and Goblers Knob loads of Xcel/Public Service. The current
curve represents an 8760 load curve minus generation of the current wind
system modeled at about 1 GW and assessed for ramp rates in 1 hour. Peetz
is an 8760 load curve minus generation of the current wind systems plus an
