February 4, 2005
All rights reserved to Shmuel Oren, UC Berkeley
PSERC
ERCOT Daily Resource Imbalance by Zone,
August 2001
-20%
-15%
-10%
-5%
0%
5%
10%
15%
20%
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
North
South
West