1. “Update on CSU Switch of CSU’s Underground Electric System”
the Expansion Station Additions and
Transmission Interconnection
with Entergy
Presented by :
David Massey, P.E.
Timothy R. Crabb, P.E.
March 22, 2012

2. For Council Approval
Construction Contract Based on Lowest Bidder Meeting
All Specifications and Requirements
Substation Additions Include:
 Distribution Additions for Service and Reliability to
Existing and Future Customers
 Transmission Interconnection as Ordered by the Public
Utilities Commission of Texas (PUCT)

4. NERC and Regional Reliability Organizations

6. Project Details
&
Bid Results

7. “SUBSTATION 101”
An Electric Substation is where the voltage is “stepped
down” to voltage that can be “distributed” throughout the
City
New Substation Transformers cost between $700K and
$1.2M each
It can take 12 to 18 months to get a new Substation
Transformer
Each Substation is designed for either 2
or 3 Substation Transformers
A new Substation costs between $4M
and $5M
CSU has a long range plan for the
number and location of Substations
required
Substation timing is determined by load
growth in an area

8. SWITCH
STATION
NORTHGATE POST OAK
SUBSTATION
SUBSTATION SUBSTATION
(PROPOSED)
SOUTHWOOD
VALLEY
SUBSTATION
DOWLING SPRING CREEK
ROAD SUBSTATION
SUBSTATION GRAHAM ROAD
SUBSTATION
(PROPOSED)
GREENS
EXISTING SUBSTATION SITE PRAIRIE
PROPOSED SUBSTATION SITE SUBSTATION

9. 2010: INSTALLED
DOWLING ROAD
SUBSTATION WITH 1-40
MVA TRANSFORMER
DOWLING
ROAD
SUBSTATION

10. SWITCH
STATION
SUBSTATION
STAYBRIDGE SUITES
AND PANERA BREAD

11. SWITCH
STATION
SUBSTATION
2012: MOVE 40 MVA
TRANSFORMER FROM
SERVICE CENTER TO
SWITCH STATION
SUBSTATION. INSTALL
ENTERGY TIE.
DOWLING
ROAD
SUBSTATION

12. PROPOSED
NORTHGATE
SUBSTATION
?

13. NORTHGATE SWITCH
SUBSTATION STATION
SUBSTATION
2013: INSTALL
NORTHGATE SUBSTATION.
MOVE 20 MVA
TRANSFORMER FROM
SWITCH STATION.
DOWLING
ROAD
SUBSTATION

14. DOWLING
ROAD
SUBSTATION

15. PROPOSED SWITCH
NORTHGATE STATION
SUBSTATION SUBSTATION
2014: INSTALL 2ND
TRANSFORMER AT
DOWLING ROAD
SUBSTATION
DOWLING
ROAD
SUBSTATION

16. ENTERGY SWITCHING STATION
CSU TO INSTALL SUBSTATION
EQUIPMENT AND ½ OF FIBER
RING
ENTERGY TO INSTALL SUBSTATION
EQUIPMENT, 500’ TRANSMISSION
TIE, AND ½ OF FIBER RING
COCS SWITCH STATION SUBSTATION

17. CSU ADDITIONS: 40 MVA
TRANSFORMER, SWITCHES,
BUS WORK, DISTRIBUTION
BREAKER BAY:
$1,992,000
ENTERGY TIE:
TRANSMISSION SWITCH,
ERCOT METERING, A-FRAME,
EXISTING 20 MVA SCADA EQUIPMENT AND
TRANSFORMER CLEAR TO CONTROLS: $669,000
MOVE TO NORTHGATE IN
2013
COCS SWITCH STATION SUBSTATION

19. ASKING FOR COUNCIL APPROVAL TO
AWARD THE BID TO PIKE ELECTRIC IN THE
AMOUNT OF $2,661,428.90 FOR THE “CSU
SWITCH STATION ADDITIONS AND
TRANSMISSION INTERCONNECTION WITH
ENTERGY” PROJECT.

20. Questions?