6.1 Gas Turbine Systems..............................................................6.2

6.2 Generator ................................................................................6.8

6.3 Gas Turbine-Generator Controls and Electric Auxiliaries......6.14

6.4 Services.................................................................................6.20

This chapter presents a listing of the equipment and services which GE proposes to provide. The list is only a quick reference to the scope of supply.

6.1 Gas Turbine Systems

6.1.1 Gas Turbine

Base-mounted gas turbine including:

· Modulating IGV

· Provision for air extraction

6.1.2 Combustion System

· Dry Low NOx combustion system

· Combustion system features

— Thermal barrier coated liners

— Nimonic transition pieces

— Reuter Stokes SiC flame detectors

— With compressor inlet heating

6.1.3 Fuel Systems

6.1.3.1 Gas Fuel System

· Natural gas only

· Stainless steel gas piping

· Duplex gas strainer

· Off base gas fuel module in a standardized location

· Gas fuel temperature < 365°F (185°C)

· Gas fuel heating system

— Electric heater, full load

· Gas fuel cleaning equipment

— Fuel gas scrubber, cyclone type

· Duplex, low pressure fuel filters, on-base

6.1.4 Lubricating and Hydraulic Systems

6.1.4.1 Pumps

· Shaft driven main lube oil pump

· Shaft driven main hydraulic pump

· AC motor driven, auxiliary lube oil and hydraulic pumps

· DC motor driven, emergency lube oil pump

6.1.4.2 Filters and Coolers

· Dual lube oil system filters

· Dual hydraulic oil filters

· Dual lube oil coolers

— With 90-10 copper-nickel U-tubes

· ASME code stamp

— Lube oil coolers

— Lube oil filters

6.1.4.3 Lube Oil Piping

· 304L stainless steel lube oil feed pipe

· Carbon steel lube oil drain pipe

· Lube system valve stainless steel trim

· Schedule 10 lube oil piping inside lube oil tank

6.1.4.4 Mist Elimination

· Lube vent demister

6.1.4.5 Oil Reservoir

· With heater for -20°F

6.1.4.6 Instrumentation

· Delta pressure switches for lubrication and hydraulic oil filters

6.1.5 Inlet System

· Inlet system arrangement

— Up and forward inlet system arrangement

— Inlet compartment supports straddle ductline

· Inlet filtration

— Self-cleaning inlet filter

— Compressor bleed air supply for filter cleaning

— Moisture resistant filter media (high humidity environments)

— Air processing unit (APU) with galvanized steel piping

— APU heat tracing kit

— APU NEMA 4X kit

— Weather protection on inlet filter compartment

— Inlet system differential pressure indicator

— Inlet system differential pressure alarm

— Inlet filter compartment support steel (Seismic Zone 2A, <= 100 mph wind speed)

— Caged ladder access to inlet filter compartment

— Left hand access to inlet filter compartment

— Inlet filter compartment interior lighting

· Inlet heating

— Inlet heating interconnecting piping

— Bleed heat manifold located in duct

— DLN premix turndown inlet bleed heat control

— Compressor pressure ratio operating limit bleed heat control

— Inlet bleed heat control valve(s)

· Inlet ducting

— Inlet silencing

— Inlet duct section arrangement per proposed mechanical outline

— Inlet expansion joint

— Inlet 90 degree elbow

— Inlet transition piece

— Inlet ducting support steel (Seismic Zone 2A, = 100 mph wind speed)

— Compressor inlet humidity sensor

— Compressor inlet temperature thermocouple

· Inlet system atmospheric protection

— Zinc rich paint inside and outside of inlet filter compartment

— Zinc rich paint on inlet filter compartment support steel

— Zinc rich paint inside and outside of inlet ducting

— Galvanized inlet silencing perforated sheet

— Zinc rich paint on inlet ducting support steel

6.1.6 Exhaust System

6.1.6.1 Arrangement

· Exhaust expansion joint

· Right side and up exhaust system configuration with exhaust plenum, expansion joint, ducting and stack

· 100 foot exhaust stack

· Exhaust silencer

6.1.6.2 Exhaust System Features

· EPA compliant emission test ports

· Continuous emission monitoring ports

· Opacity test ports

· Architectural siding for horizontal exhaust duct only

· Special exhaust system access

· Exhaust duct pressure/temperature/flow ports

· Exhaust system materials and atmospheric protection

— Carbon steel exhaust system shell and stiffeners

— 409 stainless steel internal lagging

— Inorganic zinc primer

– Duct exterior

6.1.7 Couplings

· Oil filled accessory coupling

· Rigid load coupling

· Load coupling guard

6.1.8 Gas Turbine Packaging

· Lagging and enclosures

— Load coupling compartment lagging

— Off-base acoustic enclosure for turbine and accessory compartments

· Compartment ventilation, pressurization and heating

— Single turbine and accessory compartment vent fan

— Compartment freeze protection heating

— Heated turbine and accessory compartments for humidity control

· Plant arrangement

— Turbine designed for installation outdoors

— In-line accessory module

— Exterior unit walkways

· Turbine and accessory base painting

— Standard primer only

· UBC Seismic Zone 4 (except for inlet and exhaust)

· UBC Seismic Zone 2A for inlet and exhaust

· Hazardous area classification

— NEC Class1, Group D, Division 2

– Turbine compartment

– Accessory compartment

– Natural gas fuel compartment

· Special features

— Dual (metric-English) indicators and gauges

6.1.9 Fire Protection System

· Fire detection system

— Turbine, accessory and load coupling compartments

· Smoke detection system

— Control cab/PEECC

· Compartment warning signs

· CO2 supply system

— One low pressure CO2 tank per unit

— Tank suitable for 0-120°F (-18 to 49°C)

· Fire protection piping

— Turbine and accessory enclosures

· Hazardous atmosphere detectors in turbine and gas fuel compartments

— CHx detectors - natural gas compartment

— CHx detectors - turbine gas compartment

· Hazardous atmosphere detector readout

— CHx

6.1.10 Cleaning Systems

· On base piping for on and offline compressor water wash system

· Water wash skid

— Water storage tank and freeze protection

— Capability to heat water to 180°F (82°C)

— Skid enclosure

— Single skid per site

6.1.11 Cooling Water System

· Cooling system temperature regulating valve

· Industrial, off-base cooling water system

— Aluminum fin material

6.1.12 Starting Systems

· AC motor start

· Rotor turning systems

— Rotor indexing (borescope inspection)

— Non self-sequencing, hydraulic ratchet

6.1.13 Miscellaneous Systems

6.1.13.1 Special Systems

· Exhaust frame blowers on left side

6.2 Generator

6.2.1 General Information

· Open ventilated air-cooled generator

· Outdoor installation

· 60 Hz generator frequency

· Generator voltage 13.8 kV

· 0.85 power factor (lagging)

· Capability to 1.00 power factor (leading)

· Class “F” armature and rotor insulation

· Class “B” temperature rise, armature and rotor winding

· Self-cleaning inlet filters

· Generator bearings

— Pedestal bearing support

— Tilting pad bearings

— Roll out bearing capability without removing rotor

— Insulated collector end bearing

— Offline bearing insulation check with isolated rotor

· Monitoring Devices

— Two (2) velocity vibration probes at turbine end, one (1) at collector end

— Provisions for key phasor-generator

— Permanently mounted flux probe (stator wedge)

— Proximity vibration probes

– Two probes per bearing at 45° angle

· Generator Field

— Direct cooled field

— Two-pole field

— Finger type amortissuers

6.2.2 Generator Lube Oil Systems and Equipment

· Bearing lube oil system

— Generator lube oil system integral with turbine

— Sight flow indicator

· Bearing vapor extraction

— Vapor extractor and motor

— Coalescent mist eliminator

· Lube oil system piping materials

— Stainless steel lube oil feed pipe

— Stainless steel lube oil drain pipe

— Welded oil piping

6.2.3 Generator Grounding Equipment

· Neutral grounding equipment

— Neutral ground transformer and secondary resistor

— Mounted in neutral terminal enclosure

6.2.4 Generator Temperature Devices

· Stator winding temperature devices

— 100 ohm platinum RTDs (resistance temperature detector)

— Single element RTDs

— Grounded RTDs

— Six (6) stator slot RTDs

· Gas path temperature devices

— 100 ohm platinum gas path RTDs

— Single element temperature sensors

— Two (2) cold gas

— Two (2) hot gas

· Bearing temperature devices

— Chromel alumel (type K) thermocouples

— Dual element temperature sensors

— Two (2) bearing metal temperature sensors per bearing

· Lube oil system temperature devices

— One (1) bearing drain temperature sensor per drain

— Chromel alumel (tupe K) thermocouples

— Dual element temperature sensors

6.2.5 Packaging, Enclosures, and Compartments

· Paint and preservation

— Standard alkyd beige primer

— Terminal enclosure shipped separate

· Neutral terminal enclosure

— Convection cooled

— Neutral tie

— Neutral CTs

— Neutral ground equipment mounted in enclosure

· Collector compartment/enclosure

— Collector compartment/enclosure shipped installed

— Outdoor

— Exciter enclosure for brushless exciter

· Generator fire detection

— Thermal detector in generator collector compartment

— Smoke detector in generator collector compartment

· Compartment lighting and outlets

— AC lighting

– Turbine end

– Collector compartment

— DC lighting

– Turbine end

– Collector compartment

— Convenience outlets

– Collector compartment

· Foundation hardware

— Generator shims

— Generator alignment key(s) - collector end

— Generator alignment key(s) - turbine end

6.2.6 Electrical Equipment

· Motors

— TEFC motors

— Coated with antifungal material for protection in tropical areas

— Extra severe duty motors

— Cast iron motor housings

· Heaters

— Generator stator heaters

— Generator collector heaters

— Terminal enclosure heaters

6.2.7 Generator Excitation Systems, Static Components

· EX2000BR brushless field excitation regulator

— Regulator skid mounted with turbine control panel

6.2.7.1 Excitation Module Features

· Control/monitor/display through TCP

— Power factor controller in turbine control system

— Var controller in turbine control system

— Selection of automatic or manual regulator

— Raise-lower of the active regulator setpoint

— Enter setpoint command

— Display field amps

— Display field volts

— Display transfer volts

· Built-in diagnostic display panel

— Automatic voltage regulator (AVR)

— Manual voltage regulator (FVR)

— Automatic and manual bi-directional tracking

— Reactive current compensation (RCC)

— Volts per hertz limiter (V/Hz LIM)

— Volts per hertz protection (24EX) (Backup to 24G)

— Over excitation limiter (OEL)

— Offline/online over excitation protection (76EX)

— Under excitation limiter (UEL)

— Generator overvoltage protection (59EX)

— Generator field ground detector trip (64FT)

— Diode fault monitor (58EX)

— Bridge over-temperature (26EX)

· Dual source internal bulk power supply

· Millivolt shunt for field

· Surge protection

— Two phase current sensing

— Three phase voltage sensing

— Single pole dc field contactor/bridge

6.2.7.2 Performance

· 0.5 response ratio and 140% VFFL (100°C) ceiling @ Vt = 1.0pu

6.2.8 Generator Medium Voltage Enclosure

· Metal clad switchgear compartment

· 1000 MVA/5000 A at 40°C generator breaker

· Breaker rollout

· Dual generator breaker trip coils

· Lightning arresters

· Surge capacitors

· Power leads straight through switchgear compartment

· Non segregated bus duct for outgoing power connection

6.2.9 Generator Current Transformers and Potential Transformers

· Current transformers (CTs)

— C200 current transformers (CTs)

— Line side CTs

– CT 21, 22, 23 (generator differential relay)

– CT 60, 61, 62 (breaker failure relay)

— Metering Class - 0.3B-1.8 (ANSI C57.13)

— CT ratio - 8000:5A

— Neutral CTs

– CT1, CT2, CT3

– CT4, CT5, CT6

– CT7, CT8, CT9

· Potential transformers (PTs)

— Fixed

— VT1, breaker high side

— VT2, generator line side

6.3 Gas Turbine-Generator Controls and Electric Auxiliaries

6.3.1 Control Cab/Packaged Electric and Electronic Control

Compartment (PEECC)

· Weatherproof, climate controlled, base mounted enclosure

· Supplemental wall-mounted air conditioner

6.3.2 Gas Turbine Control System Panel Features

· Triple modular redundant (TMR)

· Skid mounted control panel

· Auto/manual synchronizing module with synchronizing check function

· Generator stator overtemperature alarm (49)

· Droop control

· Load limiter

· Additional customer input contacts (digital), as available

· Additional customer output contacts (digital), as available

· Provision for analog inputs from customer, as available

· Provision for analog outputs to customer, as available

· Wet low NOx data for EPA compliance

· Vibration alarm readout and trip

· Electrical overspeed protection

· Constant settable droop

· Power factor calculation and display

· Power factor control

· VAR control

· Manual set point preselected load

· Air flow calculation and readout

6.3.3 Local Operator Station

· Commercial grade personal computer

· Color monitor

— Table top

— 17 in. screen

· Table top AT 101 keyboard

· Printer

— 24 pin dot matrix

· Display in English language

· 50 ft of Arcnet cable between gas turbine control system panel and local operator interface for indoor use

6.3.4 Remote Control and Monitoring Systems

· RS232C two way serial link (MODBUS) via remote HMI

· Ethernet link (GSM) to DCS via remote HMI server

· Multi-unit remote HMI

— One per site

· Commercial grade personal computer· Color monitor

— Table top

— 20 in. screen

· Mouse cursor control

· Table top AT 101 keyboard

· Power 120Vac 60 Hz

6.3.5 Rotor, Bearing and Performance Monitoring Systems

· Performance monitoring systems

— Air flow measurement sensors wired to gas turbine control system

· Vibration sensors

— Velocity vibration sensors

— Proximity vibration sensors

· Bently Nevada 3500 monitor

— Relay outputs wired to gas turbine control panel

— Mounted with generator control panel

· Bearing thermocouples

— Bearing drain thermocouples

— Bearing metal thermocouples

· Borescope access holes

6.3.6 Generator Control Panel

6.3.6.1 Generator Control Panel Hardware

· Mounted in PEECC

· Skid mounted with turbine panel

· DGP without test plug capability

· DGP without ModBus communication interface

· DGP with communication interface

· DGP with oscillography capture

· DGP with printer port

· DGP with redundant internal power supply

· Generator breaker trip switch (52G/CS)

· Humidity sensor readout

· Hazardous atmosphere detector readout

· Bentley Nevada vibration monitor(s)

6.3.6.2 Digital Generator Protection System (DGP)

· Generator overexcitation (24)

· Generator undervoltage (27G)

· Reverse power/anti-motoring (32-1)

· Loss of excitation (40-1,2)

· Current unbalance/negative phase sequence (46)

· System phase fault (51V)

· Generator overvoltage (59)

· Stator ground detection (64G1)/(59GN)

· Generator over/under frequency (81O-1, 81U-1)

· Generator over/under frequency (810-2, 81U-2)

· Generator differential (87G)

· Voltage transformer fuse failure (VTFF)

6.3.6.3 Generator Protection Discrete Relays

· Synchronizing undervoltage relay (27BS-1,2)

· Breaker failure protection relay (50/62BF, 62BF)

· Breaker or lockout trip coil monitor relay (74)

· DC tripping bus, blown fuse protection relay (74-2)

· Generator differential lockout relay (86G-1)

6.3.6.4 Main Transformer Discrete Relays

· Main transformer differential/lockout relay (86T/87T)

6.3.6.5 Auxiliary Transformer Protection

· Transformer phase fault relay (50/51AT-2)

· Power phase fault relay (50/51AT-4)

· Transformer ground fault relay (51TN-2)

· Lockout relay (86AT)

6.3.6.6 Cranking Motor Transformer Protection

· Ground relay (59CM)

6.3.6.7 Features Integrated Into Gas Turbine Control System

· Gas turbine control system with speed matching, synchronization and check

· Manual synchronization displayed on gas turbine control system 

· Auto/manual synchronizing module displayed on gas turbine control system

· Load control in gas turbine control system

· Temperature indication for generator RTDs

6.3.6.8 Generator Control Panel Metering

· Generator digital multimeter

— VM - Generator volts

— AM - Generator Amps: Phase 1,2,3 and Neutral

— MW - Generator MegaWatts

— MVAR - Generator MegaVARs

— FM - Generator frequency

— MVA - Generator MVA

— PF - Generator power factor— MWH - Generator MegaWatt-Hours

— MVAH - Generator MVA Hours

· Generator watt hour - JEM1 (revenue class)

· Auxiliary transformer digital multimeter

— VM - Auxiliary transformer volts

— AM - Auxiliary transformer Amps: Phase 1,2,3 and Neutral

— MW - Auxiliary transformer MegaWatts

— MVAR - Auxiliary transformer MegaVARs

— FM - Auxiliary transformer frequency

— MVA - Auxiliary transformer MVA

— PF - Auxiliary transformer power factor

· Auxiliary watt hour - JEM1 (revenue class)

6.3.6.9 Generator Control Panel Transducers

· Generator watt/VAR transducer 4-20 mA output for input to TCP (96GG-1)

· Generator TCP/droop control transducer 4-20 mA output (96GW-1)

· Generator watt/VAR transducer 4-20mA output for customer (96GG-2)

· Generator volts transducer 4-20 mA output for customer (96GV-1, 2, 3)

· Auxiliary transformer watts transducer 4-20 mA output for customer (96GW-aux)

6.3.7 Generator Protection

· Generator electrical protection equipment

— Ground brush rigging

6.3.8 Transformers

· Auxiliary transformer

— Load distribution center

· Starting motor transformer

— Starting motor limit amp

6.3.9 Batteries and Accessories

· Lead acid battery

· Single phase battery charger

· Battery and charger mounted in the PEECC

6.3.10 Motor Control Center

· MCC mounted in control cab/PEECC

· Tin-plated copper bus-work

· 42 kA bracing

· 480V 60 Hz auxiliary power

6.3.11 Motor Features

· TEFC motors less than or equal to 200 hp

· Coated with antifungal material for protection in tropical areas

· High ambient motor insulation

· Energy saver motors

· Extra severe duty motors

· Cast iron motor housings

· All redundant motors to be lead/lag

· Motor heaters

— Rated 110/120 volts, 50/60 Hz

· WP starting motor

6.4 Services

· Technical advisory services

· Transportation

— Domestic freight to the nearest available commercial railsiding

— Generator shipped with rotor installed

· Documentation

— Design drawings as described in the proposal Customer Drawing section

– Drawings in Mylar form

— Up to 10 sets of English language service manuals per station, including Operation, Maintenance and Parts volumes

· Turbine maintenance tools

— Guide pins (for removal or replacement of bearing caps, compressor casing and exhaust frame)

— Fuel nozzle wrenches

— Fuel nozzle test fixture

— Spark plug electrode tool

— Clearance tools

— Fuel nozzle staking tool

— Combustion liner tool

— Bearing and coupling disassembly fixture

· Generator maintenance tools (1 set per site)

— Rotor lifting slings

— Rotor removal equipment including shoes, pans, pulling devices

· Installation equipment

— Trunions for generator

– On permanent basis

— Foundation/installation washer and shim packs

— Turbine flush piping and consumables

– One set of piping for up to four units

– One set of consumables per unit

· Electrical System Studies

— All electrical system integration/setting studies by customer, except as follows

6.4.1 Customer Observation Points

· Observe turbine control panel final software test

· Observe turbine control panel final inspection - ready to ship

 

 

Contact Milt Fyre    milt@rmaglobal.com

Email: sales@rmaglobal.com   Phone: (503) 595-5418   Fax: (503) 635-0091   Copyright 1995-2008: RMA Inc.