Transcript Transmission Template

Entergy Gulf States, Inc.
(Texas)
Proposed Transmission
Reliability Projects
Entergy Transmission Planning Summit
New Orleans, LA
July 10, 2003
1
Texas
2
2004 EGSI-TX Proposed Transmission Reliability Projects
Possible additional
D-SMES or other devices
EGSI-TX Capacitor Bank
Reliability Improvements
(Multi-year)
230 kV Line 821
(Jacinto-Porter)
CCN
69 kV Beaumont
Reliability Improvements
(Multi-year)
Porter 230/138 kV
Substation
(Multi-year)
230 kV
Line 822
(China-Porter)
New Construction
(Multi-year)
230 kV
Line 422 (HelbigAmelia)
Line Upgrade
CARRYOVER
230 kV
Line 599 (AmeliaChina)
Line Upgrade
(Multi-year)
3
69 kV Neches
Reliability Improvements
(Multi-year)
69 kV Line 6
(Amelia-Raywood)
Reliability Improvements
(Multi-year)
2004-08
69 kV Line 6 (Amelia-Raywood):
Reliability Improvement Plan
Goals
• Increase Sectionalizing Capability to reduce restoration time
• Enhance Voltage Support
• Increase Line Capacity
Completed/In Progress Projects
• Install 69 kV circuit breakers at Batson, Sour Lake, & Daisetta substations
• Install additional sectionalizing equipment (i.e., motor-operated switches, motor
mechanisms, RTUs)
• Upgrade line capacity from Raywood Substation to Hull Tap
• Estimated Cost: $1.2M
Additional Improvements for 2004 and beyond
• Install 14 MVAR capacitor bank at Batson 69 kV substation
• Upgrade capacity from Amelia Substation to Hull Tap
Estimated Cost: $8M
4
2004-08
V
5
2004
230kV Line 821 (Jacinto-Firetower-Porter):
Certificate of Convenience and Necessity (CCN)
•
Additional load growth (industrial, commercial, & residential) in the eastern
part of Montgomery County located in Entergy's Western Region has
exacerbated the single contingency overload of several 138 kV transmission
lines. These 138 kV transmission lines are some of the key east-west tie lines
within the EGSI-TX service territory.
•
Overloading on 138 kV Line 571 (Jacinto-Tamina) have the potential to occur
under the single contingency loss of 138 kV Line 86 (Dayton Bulk-New Caney)
In addition, overloading may occur on 138 kV Line 50 (Dayton-New Long
John) and 138 kV Line 150 (New Long John-Cleveland) upon the single
contingency loss of Line 568 (China-Jacinto) 230 kV in 2004.
6
2004
230kV Line 821 (Jacinto-Firetower-Porter):
CCN (cont’d)
•
A proposed 2005 project to build a 230 kV transmission line from China to
Porter/Tamina 230 kV substations along with the construction of a new 230/138
kV substation at Porter/Tamina will relieve these single contingency line
overloads. However, this project does not meet the need of the local
distribution customers in the immediate Firetower area (Eastern Montgomery
County).
•
To serve the immediate needs in the Firetower area, a customer-owned radial
transmission line is proposed as a temporary solution for 2004. The long term
needs of the area will be met by the proposed Line 821 (Jacinto-Porter) 230
kV.
•
Estimated Cost: $400k
7
Proposed Transmission Service for Firetower Substation
Jacinto
Firetower
Tamina/
Porter
Splendora
Apollo
2003-04
• ~ $ 400 k
• Utilize existing customer-owned 138 kV
transmission line
Customer-owned line & sub
Temporary Firetower Service
Jacinto
Firetower
Tamina/
Porter
Splendora
Apollo
Customer-owned line & sub
Long Term Firetower Service
2005
• ~ $ 3.6 M
• construct 6-mile radial at 230 kV and energized
from Porter 138 kV 2005 to Firetower 138 kV
2007-08
• ~ $ 11.2 M
• construct 18-mile to complete line from
Firetower to Jacinto 230 kV substation
8
2004-05 EGSI-TX Transmission Western Region
Improvement Plan: Phase II
Phase II of the Western Region Improvement Plan addresses the projected load growth in 2005.
In 2003, several planning studies have indicated the Western Region has the potential to
encounter dynamic voltage stability problems and thermal overloading under the double
contingencies listed below.
Load at risk in 2005 is ~ 158 MW under any of the following double contingencies:
Loss of Lewis Creek Unit & 345 kV Line 119 (Crockett-Grimes)
Loss of Lewis Creek Unit & 230 kV Line 568 (China-Jacinto)
Loss of both Lewis Creek Units
Phase II Projects
1
2
1
5
3
2
4
500/230kV Auto (Cypress) COMPLETED
Construct Line 822 (China-Porter) 230 kV
3 Construct 230/138kV Porter Substation
4 Upgrade Line 599 (Amelia-China) 230 kV
5
Install 500 MVAR Dynamic Reactive Power
Support Devices
~$63M
9
2003+
EGSI-TX Capacitor Bank
Reliability Improvement Plan
•
•
•
Due to the limited supply of reactive power from generation sources in the
EGSI-TX service territory, capacitor banks provide critical additional reactive
power support.
In recent years, several different factors have contributed to violent failures of
EGSI-TX capacitor banks:
– Size of pre-insertion devices
– Relaying on capacitor banks
To prevent such failures, some capacitor banks will be targeted for reliability
improvements in 2003 and beyond that may include:
– Installation of new pre-insertion devices
– Installation of new switches equipped with pre-insertion devices
– Installation of new relaying equipment
– Relocation of some capacitor banks to electrically distance the banks
– Replace obsolescent equipment associated with capacitor banks
10
2003+
EGSI-TX Capacitor Bank
Reliability Improvement Plan
(cont’d)
•
As an interim solution, Entergy’s transmission planning, operations, and
maintenance departments are in the process of evaluating operating
procedures and work practices to develop a set of operational guidelines to
reduce the frequency of capacitor bank switching until long-term solutions can
be implemented.
•
Safety Concern
•
Estimated Cost: To be determined per each capacitor bank repair
11
2004+
Neches Station Reliability Improvement Plan
•
•
•
Neches substation was constructed in conjunction with Neches Power
Plant in 1926-27. Most of the station’s existing equipment operating today
pre-dates the 1960's. There are 12 breakers over 47 years old still in
service. Many of the switches , potential transformers, all of the insulators
and other related equipment are also all over 40 years old. There is also
environmental concern over old PT’s and bushings that have never been
tested for PCB content.
At this time, Neches substation serves primarily industrial and residential
load. The control house for Neches is inside the Neches station
generation station. Demolition of the retired generating facility has already
begun.
In 2001, a new control house was proposed to be built at a an estimated cost
of $3.25 million. It was later determined that the option to build a new control
house was not a permanent, cost-effective solution.
12
2004+
Neches Station Reliability Improvement Plan
(cont’d)
•
Recommended solution: Reconfigure Neches substation:
–
–
–
–
–
–
•
Phase I: Move load off of the 69 kV system at the existing Neches station. {IN PROGRESS}
Phase II: Acquire CCN for new 138 kV transmission line Carroll St-Viway
Phase III:Move existing Entergy load off of the 34.5 kV system at the existing Neches station.
Phase IV: Construct new 138 kV Neches bus on adjacent property and relocate 138 kV
transmission lines.
• Tie 138kV Line 457 (Neches-Carroll St) with 138kV Line 172 (Sabine-Neches)
• Construct ~2 miles of 138 kV transmission line to complete Carroll St-Viway 138 kV
Phase V: Construct new 69 kV bus and relocate 69 kV transmission lines.
Phase VI: Relocate Vidor 69 kV load to the 230 kV system
Estimated Cost: $6.5M
Mayhaw
Viway
Exxon-Mobil
Vidor
Neches
Carroll St
Mobil#2
Pennwalt
Glycol
Houston Chemical
13
2004+
Beaumont 69 kV Reliability Improvements
Helbig 230/69 kV Substation: Reconfigure
Amelia 230/69 kV Substation: Reconfigure
•
The Beaumont 69 kV subsystems are separated by a normally open circuit
breaker at Crockett 69 kV substation. The western portion of this subsystem is
served by Amelia 230/69 kV substation and Helbig 230/69 kV substation. Both
substations have a bus-tie breaker configuration.
•
Contingency: Loss of the Helbig 69 kV bus or loss of the Amelia 69 kV bus
due to a bus-tie breaker failure has the potential to cause cascading outages
on the 69 kV subsystem that serves the Beaumont commercial and residential
area.
•
Interim Solution: In 2001, 69kV Line 466 (Goodyear-West End) was upgraded
and the normally open breaker at Crockett 69 kV substation was closed.
However, under the new operating configuration, the loss of Helbig 69 kV
source may cause Line 98/190 (Nitro-S. Beaumont 69kV) to overload.
14
2004+
Beaumont 69 kV Reliability Improvements
Helbig
230/69 kV Substation: Reconfigure
Amelia 230/69 kV Substation: Reconfigure
(cont’d)
•
Recommended Solution: Reconfigure Helbig 230/69 kV substation with
additional bus-tie breaker. Reconfigure Amelia 230/69 kV substation with
additional bus-tie breaker. Close the normally-open breaker at Crockett 69 kV
substation.
•
Estimated Cost: $4.8M
15
16
2005 EGSI-TX Proposed Transmission Reliability Projects
Possible additional
D-SMES or other devices
EGSI-TX Capacitor Bank
Reliability Improvements
(Multi-year)
230 kV Line 821
(Jacinto-Porter)
(Multi-year)
Porter 230/138 kV
Substation
(Multi-year)
230 kV
Line 822
(China-Porter)
New Construction
(Multi-year)
230 kV
Line 599 (AmeliaChina)
Line Upgrade
(Multi-year)
17
69 kV Line 6
(Amelia-Raywood)
Reliability Improvements
(Multi-year)
2006-2010 EGSI-TX Transmission Reliability Target Areas
(Beaumont and Port Arthur Areas)
138 kV Line 97
(Rayburn-Doucette)
Line Overload
138 kV Line 455
(Jasper-Rayburn)
Line Overload
138 kV Line 449
(Toledo-Newton)
Line Overload
Stowell 138/69 kV
Auto Overload
69 kV Line 461
(Dupont Beaumont-Kolbs)
Line Overload
69 kV Line 427
(Port Neches-Goodrich)
Line Overload
69 kV Line 581
(Helbig-West End)
Line Overload
18
2006-2010 EGSI-TX Transmission Reliability Target Areas
(Western Region)
138 kV Line 596
(Lewis Creek-Longmire)
Line Overload
138 kV Line 93
(Doucette-Corrigan Bulk)
Line Overload
138 kV
Panorama/Longmire/
Dobbin/Navasota
Low Voltages
138 kV Line 430
(Cypress-Menard)
Line Overload
Cypress
500/230kV
&230/138 kV
Auto Overload
138 kV Line 571
(Jacinto-Tamina)
Line Overload
138 kV Line 187
(Cypress-Rye)
Line Overload
138 kV Line 50
(Dayton-New Long John)
Line Overload
138 kV Line 86
(Dayton-New Caney)
Line Overload
19
230 kV Line 599
(Amelia-China)
Line Overload
2006-10 EGSI-TX Tentative Solution
230/138 kV
Lewis Creek Substation
(2007-08)
230 kV Line 524
(Jacinto-Lewis Creek)
(2007-08)
230 kV Line 821
(Porter-Lewis Creek)
(2010)
New 230kV Line
(Cypress-Jacinto)
(multi-year project)
(2007-08)
230 kV Line 821
(Jacinto-Firetower)
(2006-07)
20