NEPOOL Reliability Committee Meeting

Westborough, MA

September 10, 2002

Agenda Item #3RC Mtg. 9/10/02

Stephen G. WhitleySenior Vice President & COO

2

• System Operations

• Energy & Congestion Uplift

• Load Response Update

• SW CT Update

• RTEP Projects Update

• Back-up Detail

Discussion Points

3

ISO Summer Operations

4

Summer Operations Highlights

• Boston & Hartford Weather Pattern: – June temperatures were average with

above normal precipitation– July & August temperatures were above

normal with below normal precipitation. • Twenty-six week days during the period with

temperatures 90 degrees or above

• Peak Load – June - 23,152 MW, 6/27/02, HE 16– July - 25,008 MW, 7/23/02, HE 15– August - 25,715 MW, 8/14/02, HE 15

5

Summer Operations Highlights

• M/S#2 Implementation: -- June - 1 day– July - 5 days– August - 7 days

• OP #4 Implementation– June - 6/26, Actions 1 & 11– July - 7/23, Actions 1 & 11– August - 8/5, 8/13, Actions 1 &11

8/14, 8/19 Actions 1 thru 11

6

Summer Operations Highlights

• Provided shared activation of reserves (SAR) -- June - 3 times– July - 9 times – August - 0 times

• Called for shared activation of reserves (SAR) -- June - 2 times– July - 2 times– August - 0 times

7

August 14, 2002 – OP# 4 day

Forecast 24,575 MW, HE 17 Reserve sharing available Morning Report Surplus 700

MW OP #4 actions not forecasted

Actual peak 25,715 MW, HE 15 New all time peak

OP #4 implemented (except in Maine)

Actions 1 & 11 13:37 to 16:30

8

REMVEC SummerOperations

9

•Peak load of 13604 MW on August 14, 3.15% increase over 2001.

•Load exceeded 12000 MW on 18 days.

•REMVEC declared M/S#2 for eastern Massachusetts on 3 occasions.

10

•Fire hoses used to lower operating temperatures on transformers at Ward Hill and Sandy Pond.

•Voltage improvements over past year paid off as only problems were in NE Massachusetts.

11

•August 21 loss of 339, 349 and Golden Hills bus due to a transformer fault resulted in M/S#2 in Eastern Massachusetts.

•August 27 loss of 339, 349 and Golden Hills bus due to a ground on 349X M/S#2 in Eastern Massachusetts.

12

Generation changes

• New Boston 1 retired July1

• Block 8 at Mystic delayed until September.

13

New Hampshire SummerOperations

14

•Set new load peak twice in July, 3 times in August.

•Peak load on August 14th of 1953 MW was 126 MW higher than 2001.

15

•High temperatures on Scobie Pond Transformer August 13-15th for the first time eve.

•Special measures implemented to cool transformer.

•PSNH prepared to shed up to 150MW on loss of Scobie Transformer to protect Deerfield auto.

16

August 19th Scobie Auto event

•Trip caused by bird on 13.8kv terminal.

•OOS 0713-1810

•Caused temporary load interruption.

•PSNH opened 115kv to Mass & Western NH.

17

Generation Changes

• CONED Newington testing aggravates Seabrook South interface.

18

Maine SummerOperations

19

•August 14 Maine Peak load of 1541 MW.

• All instances of OP#4 in New England exclude Maine due to congestion.

• Congestion an everyday occurrence in Maine.

20

Significant Events• June 5 – Bucksport over current SPS operation opened 115kv lines & tripped Bucksport & Independence generators.• July 1 – Mason Cap bank lightning arrestor failure.

No major voltage problems experienced.

21

CONVEX SummerOperations

22

• CONVEX peak load of 8028 MW & Connecticut peak load of 6861 MW occurred on July 3. These are both slightly less than the 2001 peaks.

23

•

24

NPCC Summer Operations

25

Level 1 EEAs for July & August

• IMO 13

• PJM 15

• NYISO 2

26

Level 2 EEAs for July & August

• IMO 7

• PJM 2

• NYISO 1

27

Hydro Quebec & Maritimes experienced no significant problems.