HomeMy WebLinkAboutAgenda Report - June 7, 2000 E-170
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CITY OF LODI COUNCIL COMMUNICATION
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AGENDA TITLE: Professional Services Agreement with Power Engineers Inc. for Engineering Study at Killelea
Substation ($32,000)
MEETING DATE: June 7, 2000
PREPARED BY: Electric Utility Director
RECOMMENDED ACTION: That the City Council authorize the City Manager to enter into a professional
services agreement with Power Engineers, Inc. for an engineering study
based on Power's proposed Work Plan and Budget. The engineering study,
in an amount not to exceed $32,000, will identify feasible cost-effective
rebuild options and associated costs for the Killelea Substation upgrade
project.
BACKGROUND INFORMATION: The Killelea Substation was constructed in 1965. The 12 kV section is a
metal clad type enclosed switchgear. The manufacturer of this equipment is
no longer in business making parts extremely difficult to locate. The design
of this switchgear is such that a failure of one portion of the insulated bus
likely would escalate throughout the entire switchgear making a failure catastrophic resulting in a total loss of the
station. The age and condition of the insulation material makes the likelihood of a failure greater with each passing
year. The 60 kV bus structure was the interconnection facility as well as the main 60 kV distribution structure prior to
the construction of Industrial Substation. A large portion of this structure is no longer needed and adds unnecessary
exposure to the City's electric system. This station was envisioned to be phased out of service with the construction of
Industrial Substation. However, with the significant industrial growth on the east side of the City this station will remain
a vital part of the City's distribution system and will require reconstruction to remain a reliable and dependable
substation.
The study recommended here will identify the various available configuration options, maximum of four, for
reconstruction of the station and will evaluate and provide cost estimates for each option. In addition the study
includes an evaluation of the condition and expected remaining life of each of the two power transformers based on a
series of tests to be performed on each unit. It is expected that both units will be available for use in the reconstructed
station. Upon completion of this study the Department will be able to select the most advantageous option and will at
that time return to the City Council with a recommendation to proceed with the design followed by bidding and
construction. The reconstruction project is expected to be completed and on line in the Spring of 2002.
FUNDING: Included in the 1999-2001 Financial Plan and Budget (Page E28 and E29)
(Ref: Special Allocation #84, JV #20995, dated 3!8/2000)
FUNDING APPROVAL:.
Vicky McAthi , Finance Director /O/ 2 J J /ei ,,C,
Alan N. Vallow
Electric Utility Director
Prepared by: Hans Hansen, Manager, Engineering and Operations
G: City Attorney
APPROVED: JD
H. Dixon Flynn - C y Manager
/ENG/NEEfiS
Mr. Hans Hansen, PE
City of Lodi
1331 South Ham Lane
Lodi, California 95242
Subject: 120766-01
Dear Hans,
May 10, 2000
Killelea Substation Upgrade Engineering Study
Work Plan & Budget
We are pleased to be provided the opportunity to work with the Electric Utility Department
(EUD) on the proposed upgrade to the existing Killelea substation. The purpose for upgrading
the Killelea substation is based on EUD's concerns with reliability and the operational limits
that currently exist at the substation. At one time it was thought that the Killelea substation
might be eliminated from the City of Lodi's transmission system if the Industrial substation
could pick up the Killelea load. The City has determined that the growth and load demands on
the east side of Lodi preclude eliminating Killelea substation from the City's system,
therefore, it has been decided to pursue the necessary upgrades to improve the reliability and
operations of the Killelea substation.
POWER's Randy Pollock PE, Lan Alder and John McGrew attended a meeting in Lodi on
April 3, 2000, to discuss the upgrade project. Hans Hansen, Mel Grandi, Jess Kerekes and
John Sprouse attended for Lodi. At the meeting we discussed the proposed work as outlined in
an EUD handout titled Killelea Substation Rebuild (Attachment 2). After the meeting
POWER, Hans Hansen and Jess Kerekes traveled to the substation site. POWER's work plan
and budget, as outlined herein, is based on our discussions at this meeting and our
observations of the Killelea substation site.
WORK SCOPE UNDERSTANDING
POWER's scope of work is based on performing a study to determine feasible cost-effective
rebuild options for the Killelea substation. POWER will consider both highside (60kV) and
lowside (12kV) options for the substation. POWER will consider the advantages of changing
the layout of the substation and the transmission line entries inside and outside the existing
substation property owned by the City.
POWER will investigate reconstruction alternatives for the highside. Currently the highside of
the station is designed as a main and transfer bus with six breakers. The planned use for the
substation considers one line in and one line out. The existing highside bus configuration can
be simplified to acconunodate one line in and one line out, including options for
reconstructing the highside structure that would eliminate four breakers. Furthermore,
consideration will be given to replacing oil circuit breakers with gas breakers. All applicable
items listed in the attachment will be addressed in the study.
POWER Engineers, Incorporated
3940 Glenbrook Dr. • P.O. Box 1066
Hailey, Idaho 83333
Phone (208) 788-3456
Fax (208) 788-2082
City of Lodi
May 9, 2000
Page 2
The existing 12kV metal -clad distribution equipment needs to be replaced. The existing
switchgear does not provide the sectionalizing capability that EUD requires for operating the
equipment. Also, it is difficult to replace parts because of the age of the switchgear.
Furthermore, EUD desires to replace the electromechanical relays with solid state digital
relays.
We understand the required energization date of the re -built substation to be in the Spring of
2002.
WORK PLAN
Task 0 — Project Management
Manage and administer POWER's personnel and resources during the course of the study.
Provide monthly status reports with the invoice. The status reports will address the progress of
the study as well as the planned activities for the upcoming month.
Task 1— Data Acquisition
POWER's Randy Pollock, Lan Alder and John McGrew traveled to the City on April 4`h to
meet with EUD to review the project and to visit the Killelea Substation. POWER gathered
drawings, data and information on this trip. The cost of this trip, except for Randy Pollock, is
included in this task.
Task 2 — Conceptual Layouts
Develop feasible conceptual layouts for EUD's review. Conceptual layouts will consider both
metal clad switchgear and 12kV open bus. Orientation of the substation will consider the best
use of the property for bringing the transmission in and out, and operating and maintaining the
substation. The layouts will include the entry and exit of the transmission lines and distribution
feeders, highside bus, transformers, control building, oil containment, conduit systems, both
lowside open bus and metal -clad switchgear. Consideration will be given to expanding the
substation to the west onto private property as an option if deemed reasonable, given the
configurations being investigated.
It is anticipated that there will be a minimum of two, a maximum of four conceptual layouts.
The conceptual layouts will be produced as dimensioned AutoCAD general arrangement
drawings. The drawings will be forwarded to EUD for review and comment. A teleconference
call will be scheduled to review EUD's mark-ups and comments. Changes will be agreed
upon and drawings will be marked up accordingly.
HLY 22-368
Citv of Lodi
May 9, 2000
Page 3
Task 3 — Final Drawings & Cost Estimates
Develop a minimum of two, a maximum of four final general arrangement and section
drawings of the selected options. Prepare detailed cost estimates for each option. Cost
estimates to include engineering, design, procurement, land acquisition (if applicable),
equipment and material costs, construction, construction management and commissioning.
Cost estimates to include cost of a block wall, or other type of concrete wall for the perimeter
fence to compare with the cost of a chain link fence. Oil containment options will be
considered for the transformers in the cost estimates.
Task 4 — Report
Prepare a draft report that includes a brief narrative description of each option including
advantages and disadvantages for each option. Cost estimates generated from Task 3 will be
compared for each option. Based on the costs and consideration of the advantages and
disadvantages of each option POWER will make a recommendation for the preferred
configuration.
The draft report will be forwarded to EUD for review and comment. A meeting will be
scheduled with EUD in EUD's office to go over EUD's comments. All agreed upon changes
will be made and a final report will be issued.
Engineering Study Deliverables:
• Conceptual General Arrangement Drawings in AutoCAD (minimum 2, maximum 4)
• Final General Arrangement and Section Drawings in AutoCAD (minimum 2, maximum
4)
• Detailed Cost Estimates for the selected options (minimum 2, maximum 4)
• Draft Report (Text with drawings)
• Final Report (Text with drawings)
Task 5 —Transformer Testing (Optional)
The description for this task is included as Attachment 1.
The existing transformers are presently in good operating condition, and previous testing has
shown them to be operating within acceptable parameters. However, due to the expense of
rebuilding and upgrading the Killelea substation, and due to the age of the existing
transformers, we recommend that a complete series of tests, as described in the attachment, be
performed on both transformers. Should the tests indicate any areas of concern, there will be
ample time to determine if the concerns can be remedied or if new transformers will be
required.
HLY 22-368
>'s�,�orrrEJi
City of Lodi
May 9, 2000
Page 4
SCHEDULE
The conceptual layouts will be forwarded to EUD for review and comment six weeks after
receiving notice to proceed. POWER will forward the draft report four weeks after receiving
EUD's continents. POWER will the issue final report within two weeks after receiving EUD's
comments on the draft report.
BUDGET
POWER's estimated man-hours, labor and expenses for performing the work outlined in
this letter is as follows:
0
Project Management
Hours
29
LaborTask
2553
250
:
2803
1
Data Acquisition
20
2060
1650
3710
2
Conceptual Layouts
76
5469
560
6029
3
Final Drawings & Estimates
84
6456
660
7116
4
Report & Design Review
60
5426
1749
7175
5
Project
Transformer Testing (Optional)
Total
—
--
5029
:.
HLY 22-368
sd
FNQ/NEBAS
City of Lodi
May 9, 2000
Page 5
POWER proposes to perform the work on a time and expense basis per the attached Schedule
of Charges for the estimated amount of $31,862. POWER will not exceed this estimated
amount without prior approval from EUD. If it is determined early in the study process that
there will be less than four conceptual designs then it is probable that POWER will be able to
complete the work for less than the estimated amount.
If you have any questions or comments please call Lan Alder or myself.
Sincerely,
POWER Engineers, Inc.
John McGrew
Project Manager
JM/be
Sent Via: Fed -Ex
cc: Randy Pollock (POWER)
Jeff Mann (POWER)
RM 120766-01/File
HLY 22-368
Y'1
ATTACHMENT 1
CITY OF LODI
KILLELEA SUBSTATION
TASK 5 - TRANSFORMER TESTING (OPTIONAL)
TRANSFORMERS - Liquid Filled
Visual and Mechanical Inspection
Compare equipment nameplate information with single -line diagram.
Inspect for physical damage, cracked insulators, leaks, tightness of connections, and general
mechanical and electrical conditions.
Verify proper auxiliary device operation.
Check tightness of accessible bolted electrical connections.
Check for proper liquid level in all tanks and bushings.
Perform specific inspections and mechanical tests as recommended by manufacturer.
Verify proper equipment grounding.
Electrical Tests
Perform insulation -resistance tests, winding -to -winding, and windings -to -ground, utilizing a
megohmmeter with test voltage output. Test duration shall be for 10 minutes with
resistance's tabulated at 30 seconds, 1 minute, and 10 minutes. Calculate dielectric
absorption ratio and polarization index.
Perform a turns -ratio test between windings at all tap positions. The final tap setting is to be
determined by the owner/user's electrical engineer and set by the testing firm.
Sample insulating liquid in accordance with ASTM D-923.
Sample shall be laboratory tested for:
Dielectric breakdown voltage: ASTM D-877 or ASTM D-1816
Acid neutralization number: ASTM D-974
Specific gravity: ASTM D-1298
Interfacial tension: ASTM D-971 or ASTM D-2285
Color: ASTM D-1500
Visual Condition: ASTM D-1524
Power factor: ASTM D-924
RLY 22-368 City of Lodi (5/9/00pj 120766-01
Water content: ASTM D-1533
Perform dissolved gas analysis (DGA) in accordance with ANSI/IEEE C57.104 or
ASTM D-3612.
Measure total combustible gas (TCG) content in accordance with ANSI/IEEE C.57.104
or ASTM D-3284.
Perform insulation power -factor tests or dissipation -factor tests on all windings and bushings.
Determine overall dielectric -loss and power factor (CH, CL, CHL). Test voltages should be
limited to the line -to -ground voltage rating of the transformer winding.
Perform individual excitation current tests on each phase.
Perform winding -resistance tests on each winding in final tap position.
Perform tests and adjustments on fan and pump controls and alarm functions.
CLARIFICATIONS:
The City of Lodi, will provide qualified electrical persons to work with POWER's
personnel for the purpose of providing access to equipment, facilitate production and as
required by local union rules and codes to work with POWER's on site test engineers.
2. The transformers are to be tested during normal business hours.
REPORT:
POWER has developed an extensive library of test report forms that cover all types of
equipment. These forms have been prepared to identify the location, nameplate data, and all
critical points of inspection and test data for each piece of equipment. Use of these forms will
provide client with an easy -to -read, consistent, and detailed record of the acceptance testing
of the electrical equipment.
Reports for the acceptance testing will include the following sections:
Summary of Findings
• A brief summary of the scope of the project that outlines the work performed, any
significant problems found and any recommendations made.
Equipment Description
• A brief summary of the types of equipment tested and calibrated.
Test/Accentance Procedures
• A brief description of the methodologies and procedures used for the project.
HLY 22-368 City of Lodi (5/9/00)lj 120766-01 2
Results and Recommendations
• A detailed narrative description of the results of the testing and maintenance, any
problems found, corrective measures taken, and any recommendations.
Test Data Sheets
• A complete copy of each test data form used.
PRICE:
POWER Engineers, Inc. has estimated the price to perform the acceptance testing of the
equipment scope defined can be provided for:
Five thousand, twenty nine dollars...........................................................$5,029.00
HLY 22-368 City of Lodi (&9/00)[i 12076"] 3
ATTACHMENT 2
CITY OF LODI
KILLELEA SUBSTATION
REBUILD
Goal: Recondition Killelea Substation. Replace existing 12kV metal -clad distribution
equipment. Reconstruct 60kV section and eliminate equipment no longer required. Construct oil
retention system. Eliminate existing 12kV cable trench and install conduit duct systems.
Operating requirements: The design must allow for de -energized maintenance of any
component of the station with a minimum of half the station remaining energized i.e. serving
load.
Specific items to incorporate in design:
1. Require eight - 12kV feeders i.e. four on each bank.
2. Feeders to be in conduit systems and terminate at the north and south property line of the
station in vaults. Maximum two feeders per vault.
3. Cables (if used) from transformer to 12kV distribution structure to be in conduits.
4. Strain relief on 12 kV transformer bushings.
5. Eliminate non -required components of the 60 kV structure. Consider replacing oil circuit
breakers with SF6.
6. Reroute 60 kV lines as may be necessary (one in, one out).
7. Install oil retention system for all oil filled equipment.
8. Control building must include HVAC system and toilet facilities.
9. Determine need for station capacitor banks (relocate to other station or place on distribution
system).
10. All relays to be solid state. Feeders to include reclosing relays.
11. Evaluate transformer condition to determine if replacement is warranted.
12. Reconstruct phone service for voice and SCADA to meet PacBell's requirements.
13. Existing RTU loaded to capacity, may require replacement.
14. Review, and modify as required, station security, i.e. infrared detection, fencing, step and
touch potential, etc.
15. Review and modify ground grid system, as needed.
16. Consider installing oil filtration system on transformer load tap changing equipment.
17. Station light and power to be from two independent sources with transfer switch.
HLY 22-368 City of Lodi (51910Opj 120766-01
RESOLUTION NO. 2000-95
A RESOLUTION OF THE LODI CITY COUNCIL AUTHORIZING
THE CITY MANAGER TO EXECUTE A PROFESSIONAL
SERVICES CONTRACT WITH POWER ENGINEERS, INC., FOR
AN ENGINEERING STUDY FOR KILLELEA SUBSTATION
BE IT RESOLVED, that the Lodi City Council hereby authorizes the City
Manager to enter into a Professional Service Contract with Power Engineers, Inc., for an
engineering study to determine a feasible cost-effective rebuild option for the Killelea
Substation upgrade project in the amount of $32,000.00.
Dated: June 7, 2000
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I hereby certify that Resolution No. 2000-95 was passed and adopted by the Lodi
City Council in a regular meeting held June 7, 2000 by the following vote:
AYES: Council Members — Hitchcock, Land, Nakanishi, Pennino
and Mann (Mayor)
NOES: Council Members - None
ABSENT: Council Members - None
ABSTAIN: Council Members - None
2000-95