Entergy Gulf States, Inc' Texas Proposed Transmission Reliability Projects

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Entergy Gulf States, Inc.(Texas)Proposed
Transmission Reliability Projects

• Entergy Transmission Planning Summit
• New Orleans, LA
• July 10, 2003

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Texas
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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 422 (Helbig-Amelia) Line
Upgrade CARRYOVER
230 kV Line 821 (Jacinto-Porter) CCN

69 kV Beaumont Reliability Improvements (Multi-yea
r)
Porter 230/138 kV Substation (Multi-year)
69 kV Neches Reliability Improvements (Multi-year)
230 kV Line 822 (China-Porter) New
Construction (Multi-year)
230 kV Line 599 (Amelia-China) Line
Upgrade (Multi-year)
69 kV Line 6 (Amelia-Raywood) Reliability
Improvements (Multi-year)
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69 kV Line 6 (Amelia-Raywood)Reliability
Improvement Plan
2004-08

• 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

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2004-08
V
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230kV Line 821 (Jacinto-Firetower-Porter)Certifi
cate of Convenience and Necessity (CCN)
2004

• 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.

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230kV Line 821 (Jacinto-Firetower-Porter)CCN
(contd)
2004

• 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

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Proposed Transmission Service for Firetower
Substation
Jacinto

• 2003-04
• 400 k
• Utilize existing customer-owned 138 kV
  transmission line

Firetower
Splendora
Apollo
Tamina/Porter
Customer-owned line sub
Temporary Firetower Service
Jacinto

• 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

Firetower
Splendora
Apollo
Tamina/Porter
Customer-owned line sub
Long Term Firetower Service
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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

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5
3
2
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63M
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EGSI-TX Capacitor BankReliability Improvement
Plan
2003

• 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

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2003
EGSI-TX Capacitor BankReliability Improvement
Plan(contd)

• As an interim solution, Entergys 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

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Neches Station Reliability Improvement Plan
2004

• Neches substation was constructed in conjunction
  with Neches Power Plant in 1926-27. Most of the
  stations 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 PTs 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.

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Neches Station Reliability Improvement Plan
(contd)
2004

• 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 IIIMove 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
Vidor
Viway
Exxon-Mobil
Neches
Carroll St
Mobil2
Pennwalt
Glycol
Houston Chemical
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Beaumont 69 kV Reliability ImprovementsHelbig
230/69 kV Substation ReconfigureAmelia 230/69
kV Substation Reconfigure
2004

• 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.

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Beaumont 69 kV Reliability Improvements Helbig
230/69 kV Substation ReconfigureAmelia 230/69
kV Substation Reconfigure(contd)
2004

• 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

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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 (Amelia-China) Line
Upgrade (Multi-year)
69 kV Line 6 (Amelia-Raywood) Reliability
Improvements (Multi-year)
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2006-2010 EGSI-TX Transmission Reliability Target
Areas (Beaumont and Port Arthur Areas)
138 kV Line 449 (Toledo-Newton) Line Overload
138 kV Line 97 (Rayburn-Doucette) Line Overload
138 kV Line 455 (Jasper-Rayburn) Line Overload
Stowell 138/69 kV Auto Overload
69 kV Line 461 (Dupont Beaumont-Kolbs) Line
Overload
69 kV Line 581 (Helbig-West End) Line Overload
69 kV Line 427 (Port Neches-Goodrich) Line
Overload
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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 Line 430 (Cypress-Menard) Line Overload
138 kV Panorama/Longmire/ Dobbin/Navasota Low
Voltages
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
230 kV Line 599 (Amelia-China) Line Overload
138 kV Line 86 (Dayton-New Caney) Line Overload
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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)