Download TECHNICAL SPECIFICATION FOR 138kV 31.2 MVAR

TECHNICAL SPECIFICATION FOR
138kV 31.2 MVAR,
138kV 15.6 MVAR,
69kV 15.6 MVAR &
69kV 7.8 MVAR
SHUNT POWER CAPACITORS
LOWER COLORADO RIVER AUTHORITY
SPECIFICATION FOR
138kV 31.2 MVAR, 138kV 15.6 MVAR, 69kV 15.6 MVAR &
69kV 7.8 MVAR
SHUNT POWER CAPACITOR
SPECIFICATION NO. 582B
DATE: January 1, 2016
1.00
ITEMS:
Capacitor, Power, Shunt 138kV 31.2MVAR
Capacitor, Power, Shunt 138kV 15.6MVAR
Capacitor, Power, Shunt 69kV 15.6MVAR
Capacitor, Power, Shunt 69kV 7.8 MVAR
2.00
SCOPE:
This specification establishes minimum standard requirements for the design,
construction, testing, and supplementary requirements for 138kV and 69kV
maximum voltage class outdoor, open rack power capacitors intended for shunt
connection to alternating current transmission system. The capacitor bank shall be
supplied complete with capacitor units, elevating structure, mounting frames, buss
work, connection provisions, hardware and all spacing/base support insulators.
All banks should be designed for a grounded single wye configuration that will be
switched daily.
3.00
USE:
The equipment specified herein is to be used for an electric utility's transmission
system to aid in improving the system operating profile throughout the Central
Texas area.
4.00
APPLICABLE STANDARDS:
The latest revision of the following standards shall apply to this Specification as well
as any standard referred to herein.
4.01
Industry Standards
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4.01.01 Institute of Electrical Electronic Engineers (IEEE) 18-2012
Standard for Shunt Power Capacitors.
4.01.02 (IEEE) 37.41e – 1996, IEEE Standard Design Tests for External
Fuses for Shunt Capacitors.
4.01.03 (IEEE) C57.19 – 2004 IEEE Standard General
Requirements and Test Procedures for Outdoor Power Apparatus
Bushings.
4.01.04 (IEEE) 37.99 – 2012, IEEE Guide for Protection of Shunt
Capacitor Banks.
5.00
6.00
4.01.05
(IEEE) 1036 – 2010, IEEE Guide for Application of Shunt
Power Capacitors.
4.01.06
NFPA 70-2002, National Electrical Code (NEC)
GENERAL:
5.01
Items furnished under this specification shall in all respects meet the
dimensional and performance requirements hereinafter stated and as
stated in the above standards or the references therein.
5.02
The requirements specifically stated herein shall govern should there be
any conflict with the above standards or the references therein.
5.03
All items of the same design and rating furnished shall be mechanically and
electrically interchangeable.
CLASSIFICATION AND RATING:
6.01
Shunt power capacitors shall be classified for outdoor use.
6.02
Capacitors shall be designed for continuous operation at a minimum
ambient temperature of -400 C and a maximum +400 C.
6.03
Capacitors shall be designed for switched or continuous operation with
unrestricted ventilation and direct sunlight under the ambient temperatures
listed in IEEE 18-2012, Section 5.7.1.
6.04
Capacitors shall give not less than the rated reactive power at rated
sinusoidal voltage and frequency. Capacitors shall not give more than
110% of the rated reactive power measured at 250 C uniform case and
internal temperature.
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6.05
Capacitors shall be suitable for continuous operation at 135% of rated
reactive power. The combined effects listed below shall not exceed 135%
of the rated reactive power. This maximum reactive power shall include the
following factors.
A) Reactive power due to voltage greater than the nameplate rating at
fundamental frequency but within the permissible voltage limitations
described in section 6.06 below.
B) Reactive power due to harmonic voltages superimposed on the
fundamental frequency.
C) Reactive power greater than the nameplate rating due to
manufacturing tolerance within the limits specified in section 6.04
above.
6.06
Capacitors shall be capable of continuous operation provided that none of
the following limitations are exceeded:
A) 110% of rated RMS voltage
B) 120% of rated peak voltage, i.e. peak voltage not exceeding 1.2 x
(square root of two) x rated RMS voltage, including harmonics, but
excluding transients
C) 135% of nominal RMS current based on rated KVAR and rated voltage
D)
135% of rated KVAR
6.07
Capacitors shall be capable of withstanding, with full life expectancy,
switching transients having crest voltages up to two times the peak of the
capacitor rated voltage, and other transient over-voltages and over-currents
normally associated with the operation of shunt power capacitors on
electric power systems as outlined in IEEE Std 1036-2010.
6.08
Shunt power capacitors shall conform to the voltage and reactive power
ratings specified in IEEE 18-2012, Table 1.
6.09
Shunt power capacitors shall comply with the basic impulse insulation level
(BIL) specified in IEEE 18-2012, Table 2.
6.10
Shunt power capacitors shall be rated for operation at 60 hertz alternating
current.
6.11
Shunt power capacitors shall have the following standard ratings:
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A)
B)
C)
D)
E)
Voltage, RMS (terminal-to-terminal),
Terminal-to-case (or ground) insulation class,
Reactive power,
Number of Phases,
Frequency.
6.12
Shunt power capacitors shall be rated to meet the in-service conditions
specified under IEEE 18-2012, Section 4.
6.13
Radio influence voltage generated by capacitors shall not exceed the value
specified in ANSI/IEEE 18-2012, Section 6.4 and the reference therein.
6.14
Shunt power capacitors shall have a one (1) or two (2) bushing design for
installation on a single phase Wye grounded system.
6.15
Capacitor bushings shall comply with the minimum electrical characteristics
specified under IEEE 18-2012, Table 5.
6.16
Shunt power capacitors shall meet the following requirements:
Externally Fused Banks Grounded Single Wye Configuration:
A) 138kV, 31.2 MVAR
1 Can - 19.92kV 200KVAR @ 200kV BIL, 60 Hz (4 series, 13 parallel
total 52 cans per phase)
B) 138kV, 15.6 MVAR
1 Can- 19.92kV 100KVAR @ 200kV BIL, 60 Hz (4 series, 13 parallel
total 52 cans per phase)
C) 69kV, 15.6 MVAR
1 Can- 19.92kV 200KVAR @ 200kV BIL, 60Hz (2 series, 13 parallel
total 26 cans per phase)
Fuseless Banks Grounded Single Wye Configuration:
A) 138kV, 31.2 MVAR
1 Can - 19.92kV 650KVAR @ 150kV BIL, 60 Hz (4 series, 4 parallel
total 16 cans per phase)
B) 138kV, 15.6 MVAR
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1 Can- 19.92kV 650KVAR @ 150kV BIL, 60 Hz (4 series, 2 parallel
total 8 cans per phase)
C) 69kV, 15.6 MVAR
1 Can- 19.92kV 650KVAR @ 150kV BIL, 60Hz (2 series, 4 parallel
total 8 cans per phase)
D)
69kV, 7.8 MVAR
1 Can- 19.92kV 650KVAR @ 150kV BIL, 60Hz (2 series, 2 parallel
total 4 cans per phase)
6.17
7.00
Fusing Size based on manufacturer recommendation.
CONSTRUCTION:
7.01
Capacitors shall be thermally stable in accordance with the definition and
operating conditions outlined in IEEE Std. 18-2012, Section 7.1.3.
7.02
Capacitors shall not be damaged by partial discharges when energized
under any conditions of ambient temperature or continuous voltage
permitted in accordance with IEEE 18- 2012.
7.03
Capacitors shall be equipped with an internal discharge resistor which will
reduce the residual voltage to 50 volts or less within five (5) minutes of time
limit after the capacitor is disconnected from the rated voltage.
7.04
Capacitors shall have a No. 409 stainless steel casing (shell). Capacitors
shall be hermetically sealed by welding or solder seal process.
7.05
Capacitors shall be painted ANSI 70, sky gray. Capacitors shall comply
with the finish requirements stated in ANSI Z55.1.
7.06
Capacitors shall have heavy duty stainless steel mounting brackets. The
bracket dimensions shall comply with the requirements specified in IEEE
18-2012, Section 6.9. The mounting contact surface shall be unpainted to
assure positive grounding to the frame or hanger.
7.07
Capacitors shall have an all film/foil-type design and shall be impregnated
with a dielectric fluid. Paper type design shall not be acceptable.
7.07a The dielectric film stress shall not exceed 2000 volts per mil when the
capacitor is energized at rated voltage. The dielectric film stress shall be
calculated using the dry thickness of the dielectric film. Rated voltage of
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each element shall not exceed 2000 volts. Lower stresses may be
specified by the LCRA as determined by electrical conditions at the
planned location.
7.08
Capacitor fluid shall be low toxicity and biodegradable with high dielectric
strength and temperature stability. Capacitors shall be free of PCB
(Polychlorinated-biphenyl).
7.09
Capacitors shall have one or two glazed wet processed porcelain insulator
bushings that comply with the (BIL) requirements specified herein.
7.10
Capacitor bushing(s) shall have a tin or Cadmium plated parallel groove
connector. The connector's clamping range shall accommodate conductor
sizes ranging from number 8 AWG solid through number 2 AWG stranded
conductor.
7.11
Each capacitor shall have a permanent weather resistant name plate. The
name plate shall clearly state the following information:
A)
B)
C)
D)
E)
F)
G)
H)
I)
Name of Manufacturer,
Unique serial number,
Manufacturers type, model, style, or catalog number.
Year manufactured,
Rated reactive power,
Rated voltage RMS,
Number of phase,
Rated frequency,
BIL (if applicable). For capacitors having bushings with two different
BIL ratings, the nameplate shall show both BIL ratings, e.g. 150/95 kV
BIL.
J) Flammability classification and volume of insulating fluid.
K) Statement that capacitor contains an internal discharge device.
L) Nominal or measured capacitance, µF
7.12
The manufacturer shall attach a weather resistant blue label or decal
indicating non-PCB. This information shall be located where it can be seen
from the ground.
7.13
Terminal "bird guards" are not required on capacitors unless specified by
the purchaser.
7.14
When units are to be supplied in banks, the capacitors shall be individually
fused with indicating expulsion fuse units (For Externally Fused Banks).
7.15
When substation banks are requested, the following spare equipment is
required and shall be included in the total quoted cost:
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Externally Fused Banks:
# OF INDIVIDUAL
INDICATING
EXPULSION FUSE
ASSEMBLIES
# OF FUSE
LINKS
10
10
Capacitor units: 1 spare can for each 20 cans installed
Fuseless Banks:
Capacitor units: 1 spare can for each 6 cans installed
LV Capacitor units: 1 spare can for each 6 cans installed
LV Resistor: 1 spare resistor for each 3 resistors
7.16
When substation substructures are required, the following shall be provided
and the price shall be included in the quoted cost:
A) 138kV Banks:
The 138kV bank assembly will consist of 3 stacks for three phase
operation. Steel frames (racks) shall be hot-dipped galvanized after
fabrication and conform to ASTM-A37. The manufacturer shall supply
a twelve (12) foot high substructure for ground clearance, high strength
base, stacking insulators, and all necessary bus work. The capacitor
bank shall be designed to handle continuous wind loading of 110mph
with a gust factor of 1.3 without damage.
All connections in the
structure will be made with through bolt connections using nuts and
bolts, screw type connections are not acceptable. The shunt capacitor
bank shall be outdoor, open structured type with capacitors connected
in series and parallel groups. All hardware and materials for electrical
and mechanical connections shall be furnished with the capacitor
bank.
Each capacitor bank shall have spare units mounted in open slots in
the bottom rack of each phase. The bushings of each spare unit shall
be shorted together and connected to the frame with an insulated
conductor. The total number of spare units for each bank shall be as
specified in 7.15 of this specification. The spare units shall be evenly
distributed between the bottom racks of each phase.
B) 69kV Banks:
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The 69kV bank assembly will consist of 1 stack for three phase
operation. Steel frame (rack) shall be hot-dipped galvanized after
fabrication and conform to ASTM-A37. The manufacturer shall supply
a twelve (12) foot high substructure for ground clearance, high strength
base, stacking insulators, and all necessary bus work. The capacitor
bank shall be designed to handle continuous wind loading of 110mph
with a gust factor of 1.3 without damage.
All connections in the
structure will be made with through bolt connections using nuts and
bolts, screw type connections are not acceptable. The shunt capacitor
bank shall be outdoor, open structured type with capacitors connected
in series and parallel groups. All hardware and materials for electrical
and mechanical connections shall be furnished with the capacitor
bank.
Each capacitor bank shall have spare units mounted in open slots in
the bottom rack of each phase. The bushings of each spare unit shall
be shorted together and connected to the frame with an insulated
conductor. The total number of spare units for each bank shall be as
specified in 7.15 of this specification. The spare units shall be evenly
distributed between the bottom racks of each phase.
7.17
Two ground pads, each with two holes drilled to NEMA spacing, shall be
provided on diagonally opposite sides of the elevating structure for
grounding.
7.18
The structure shall include appropriate means for mounting and connecting
capacitor units. They should also include a terminal pad for the incoming
cable phase connections.
7.19
All base insulators shall be high strength porcelain, post type, gray and per
ANSI standards. Inter-rack insulators shall be standard strength (middle
rack) and standard strength (top rack).
7.20
The buss shall be rated for a maximum temperature rise of 30 0C in an
ambient of 400C at 135% rated current.
7.21
The structure shall be provided with a capacitor bank nameplate mounted
at eye level in a convenient location. The nameplate shall include bank
rated voltage, bank BIL, bank KVAR, bank connection (grounded wye), and
bank type (fused or fuse less).
7.22
Each rack shall be equipped with a warning sign on all four sides reading
“CAUTION! FRAME ENERGIZED” or similar wording.
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8.00
7.23
Anchor bolts with hex nuts and washers shall be supplied by the foundation
installer.
7.24
Clamp connectors shall be provided for the capacitor terminals in
accordance with IEEE STD 18-2012, Section 6.6.
BANK PROTECTION:
8.01
The manufacturer shall supply the following components for each capacitor
bank ordered, to be used in protection scheme.
Externally Fused Bank Protection
(Neutral to Ground CT Protection Scheme)
1 - Mounting bracket for Current transformer.
1 - CT, 15 KV, dual ratio 20/10:5 ratio, 110 KV BIL
1 - CT primary spark gap – for protection of the primary winding of the CT.
Fuseless Bank Protection
(Neutral to Ground CT Protection Scheme, Unbalance Voltage Protection
Scheme)
1 – Mounting bracket for Current transformer and PT
1 – CT, 15 KV, dual ratio 20/10:5, 110 KV BIL
1 – CT primary spark gap – for protection of the primary winding of the CT.
3 – PT, 800/250, 95 kV BIL (Dry Type)
1 – Unbalance Protection Junction Box (Shielded cables to PT/CT)
3 – Resistor, 100 ohm, 10 Watts, install in series with PTs
1 – Low Voltage Capacitor, 167 kvar, 825V, 95kV BIL, install in parallel with
PTs (Note: 1 for 15.6 MVAR Banks, 2 for 31.2 MVAR Banks)
9.00
DRAWINGS AND INSTRUCTION MANUALS:
All drawings and instruction manuals shall be submitted in accordance with
the following.
9.01
Approval Drawings (AutoCAD 2012 electronic files shall be sent
electronically via e-mail.)
The manufacturer shall furnish for approval on AutoCAD 2012 electronic
file and six (6) paper copies each of the following drawings:
10
A)
B)
C)
D)
E)
F)
G)
9.02
Outline dimensions of capacitor,
Insulators,
Mounting brackets,
Outline dimension showing stacked capacitors,
Fuse link (recommended),
Manufacturers Catalog Number.
Nameplate Information
Final Drawings
Once LCRA comments and corrections have been taken from the drawings
listed in Section 9.01, final drawings shall be submitted. AutoCAD 2012
Electronic files shall be submitted via e-mail and CD-ROM formats.
Note:
9.03
Drawings submitted shall be unique drawings customized for
LCRA including all options and excluding any options which are
not requested in these Specifications. "Typical" drawings are not
acceptable. AutoCAD-generated drawings shall also be provided.
Instruction Manuals
Any applicable instruction manuals shall be provided with the final drawings
via e-mail and CD-ROM formats. Any service advisories shall be sent to the
Manager of Construction Maintenance.
9.04
Service Bulletins
The Contractor shall be responsible for providing any and all service
bulletins/advisories on equipment provided after delivery. This is to be an
ongoing process provided by the Contractor to ensure that LCRA is
informed of any mechanical and/or electrical problems which may result in
personnel danger or equipment malfunction/failure. This service shall
continue beyond the standard warranty period and any fee for this service
shall be included in the purchase price of the equipment.
This
correspondence shall be sent to the LCRA Maintenance Department, and
shall reference the original purchase order number, equipment model, serial
number(s), and date of manufacture. Service advisory information shall be
sent to [email protected] on top of any other communications made
to the LCRA.
9.05
MSDS Sheets
The Contractor shall furnish Material Safety Data Sheets (MSDS OSHA
Form 20) on all chemicals and hazardous materials specifying generic and
trade name of the product, product specification, full hazard information,
11
instructions and special equipment required for handling, information on
approved containers, and instructions for disposal. An MSDS sheet shall be
furnished with each shipment of chemicals or hazardous materials.
9.06
Training
The Contractor shall provide up to two (2) days of offsite training in Austin,
Texas by a qualified instructor to educate LCRA technicians on the
installation, testing, and maintenance of the Shunt Power Capacitor Bank.
This training shall be conducted in Austin when all materials have been
received. This training shall not be priced as part of the price of the Shunt
Power Capacitor Banks that are bid. A separate description of the training
and pricing shall be provided as part of the Contractor’s proposal.
10.00 TESTING - INSPECTIONS:
10.01 Testing
10.01.01
The manufacturer shall conduct design and production testing
as follows. The manufacturer shall comply with the specific
testing requirements specified under IEEE 18-2012, Section 7
therein.
Production Test
A)
B)
C)
D)
E)
Short time overvoltage
Capacitance
Leak
Discharge resistor
Loss determination
Design Tests
A)
B)
C)
D)
E)
F)
G)
10.01.02
Dielectric withstand
Impulse withstand
Bushing
Thermal stability
Radio influence voltage
Voltage decay
Short circuit discharge
The manufacturer shall furnish a certified test report for the tests
described above. The report shall list each test conducted and
test results.
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10.01.03
The conditions that the tests shall be performed under shall
comply with IEEE 18-2012, Section 7.1.3 therein.
10.01.04
LCRA reserves the right to be present to observe the tests
described herein.
10.01.05
LCRA reserves the right to test or have test conducted on any
item furnished under this specification.
10.01.06
Any item which fails to pass the prescribed tests described
herein shall be rejected from any shipment.
10.02
Inspection
10.02.01
The manufacturer shall conduct production and final inspections
to assure that all items are in compliance with this specification.
Any nonconforming items shall be rejected.
10.02.02
The vendor shall assure that all items which have been in the
vendor's possession have been inspected and are in
compliance with this specification.
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