Acrobat

Eastern, WECC, ERCOT and Quebec
Frequency Events’ Data Summary and
Corresponding Frequency Plots for March 2015
For: NERC Resources Subcommittee and Frequency Working Group
Prepared by: CERTS and Electric Power Group
April 16, 2015
Event Color Definition Description:
NERC INTERCONNECTIONS MARCH, 2015 FREQUENCY EVENTS – SUMMARY DATA
EASTERN
Frequency Response can be calculated from NERC SA Actual MW Loss divided by 10* B-A. The results will be in MW/0.1 HZ
NERC INTERCONNECTIONS MARCH, 2015 FREQUENCY EVENTS – SUMMARY DATA
WESTERN
ERCOT
QUEBEC
Frequency Response can be calculated from NERC SA Actual MW Loss divided by 10* B-A. The results will be in MW/0.1 HZ
#
#
&
"
#
$
)
%
&
"
*
+
-
-
)
+
3
-
*
,
*
/
-
-
/
3
/
/
/
-
!
+
,
*
(
+
)
&
"
'
#
$
%
(
2
1
0
/
/
3
/
/
2
1
0
(
$
)
$
)
.
(
'
&
"
-
*
(
'
.
)
$
%
&
$
"
-
4
+
)
%
#
*
+
)
(
.
$
&
"
%
#
$
%
#
#
#
$
)
%
&
"
,
6
*
+
+
5
6
*
#
2
1
0
-
-
6
,
/
$
)
%
&
"
6
*
2
/
,
-
4
,
3
7
/
,
,
/
4
-
/
/
+
4
6
*
(
1
0
-
+
)
$
)
-
&
"
'
$
%
5
4
4
3
(
)
#
2
1
0
4
*
$
+
(
)
6
*
)
&
"
'
+
#
$
%
(
$
)
.
(
'
&
"
/
-
*
.
)
$
%
$
&
+
%
"
6
-
*
+
#
2
1
0
(
)
$
(
(
)
.
&
"
'
.
)
$
&
"
%
#
$
%
#
+
-
,
*
)
(
.
+
)
%
%
&
$
#
+
$
"
3
6
*
+
#
2
1
0
#
$
)
%
&
"
6
6
*
(
'
&
"
7
4
*
$
)
4
*
2
1
0
,
,
2
1
0
4
6
6
4
8
4
,
-
-
4
8
-
8
8
+
$
4
*
(
)
+
)
&
"
'
#
$
%
(
)
$
(
(
)
.
&
"
'
.
)
$
&
"
%
#
$
%
#
+
)
6
4
*
(
.
+
)
$
&
"
%
#
$
%
&
"
/
4
*
(
'
$
)
5
5
-
2
1
0
8
8
#
#
"
#
"
2
1
0
0
#
"
#
"
0
#
$
)
%
&
"
6
*
+
+
)
5
6
*
(
.
+
)
$
%
&
$
7
6
*
%
+
&
6
4
*
(
'
4
*
2
1
0
/
$
)
4
5
4
2
1
,
8
8
$
+
)
%
,
*
(
.
&
$
+
)
%
&
/
/
*
(
'
$
)
-
/
2
1
-
/
,
/
/
5
-
8
8
+
$
6
*
(
)
+
)
&
"
'
#
$
%
(
)
$
(
(
)
.
&
"
'
.
)
$
&
"
%
#
$
%
*
+
5
6
)
(
.
+
)
$
%
&
#
$
"
%
#
,
4
*
(
'
&
"
$
)
4
,
2
1
0
,
5
#
*
+
,
6
)
(
.
+
)
$
%
&
"
+
)
$
#
"
#
6
*
(
.
&
6
6
*
(
'
+
)
$
&
"
%
#
$
%
%
$
)
&
"
6
6
*
(
'
5
2
1
0
$
)
3
3
5
2
1
0
8
8
8
8
#
+
6
/
*
)
(
.
+
)
$
&
"
%
#
$
%
&
"
-
*
(
'
#
*
+
/
)
(
.
+
)
$
%
&
"
/
/
2
1
0
$
$
%
#
)
,
*
(
'
&
"
3
6
5
$
)
,
-
2
1
0
/
6
5
#
$
+
)
%
4
7
*
(
.
&
"
#
$
+
)
%
&
"
-
*
(
'
#
$
+
)
%
4
5
*
(
.
&
"
$
)
-
2
1
0
#
$
+
)
%
&
"
4
,
*
(
'
5
$
)
-
3
6
2
1
0
8
8
#
$
*
+
6
-
(
.
&
"
)
%
A
@
#
*
+
/
/
/
)
(
.
G
B
C
I
?
H
F
E
9
D
+
)
$
&
"
%
#
$
%
&
"
4
5
*
(
'
$
)
:
#
$
/
*
(
.
&
"
#
$
+
)
%
&
"
3
*
(
'
$
)
2
1
0
-
3
?
>
6
,
4
3
5
3
=
/
+
)
%
8
8
<
9
;
/
5
3
2
1
0
$
2
1
0
)
#
"
#
&
*
+
/
7
,
)
+
7
*
$
2
1
0
=
L
8
8
A
B
C
@
9
-
*
5
3
8
8
J
>
/
=
=
J
H
8
8
+
F
(
G
)
&
"
'
#
$
%
E
)
(
,
4
*
(
K
(
'
+
)
&
"
'
.
)
$
/
,
%
&
"
*
+
)
(
.
$
#
$
&
"
%
#
$
%
%