Siemens SGT-400 Operator'S Manual Download Page 22 | Manualshive

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Chapter 1
Turbine Package System Overview

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Summary of Contents for SGT-400

Page 1: ...uter Casing and Interduct Assembly 7 Power Turbine Bearing Housing 7 Exhaust Diffuser 7 Auxiliary Gearbox 7 Cooling and Sealing Air System 7 Turbine Instrumentation 8 Temperature Monitoring 8 Speed monitoring 8 Vibration Monitoring 8 Pressure Monitoring 8 Turbine Core Auxiliary Equipment 9 Variable Guide Vane VGV Actuator 9 Interstage Bleed Valve 9 P2 Blow off Valves 9 Waterwash Nozzles 9 Auxiliar...

Page 2: ...l Control Valve Actuator Assemblies 16 Electronic Control Unit ECU 17 Fuel Burners 17 Igniter 17 Instrumentation 17 Position Monitoring 17 Pressure Monitoring 17 Temperature Monitoring 18 Burner Instrumentation 18 Fuel System Requirements 18 Air Distribution System 19 Air Distribution System Components 19 Instrument Air Manual Shut Off Valve and Filter Assembly 19 Gas Fuel Module 19 Off Skid Gas F...

Page 3: ...tation 26 Combustion Air System 27 Air Inlet Filter Marine Type if applicable 27 Air Intake Filter Pulse Type if applicable 27 Air Intake Silencer 27 Acoustic Lagging 28 Instrumentation 28 Exhaust System 28 Exhaust Silencer 28 Acoustic and Thermal Lagging 28 Instrumentation 28 Fire Gas Protection System 29 General Description 29 System Control and Operation 29 System Components 29 Heat Detectors 2...

Page 4: ...l Panels and Electrical Equipment Cabinets 35 Introduction 35 Unit Control System 35 General Description 36 Human Machine Interface HMI 36 Generator Monitoring Control 37 Generator Control Panel GCP 37 Description 37 Batteries Battery Charging System 38 Battery Charger System Controller 38 24 Volt Batteries 38 24 Volt DC Battery Charger 38 ...

Page 5: ...reen and a flexible joint which accommodates relative movements due to thermal expansion are fitted to the rectangular casing entry point to which external ducting is connected Compressor Inlet Bearing Housing Assembly The Compressor Inlet Bearing Housing Assembly which is mounted on the turbine auxiliary gearbox support casing provides support for the Air Inlet Casing and Low Pressure LP Compress...

Page 6: ...nt of the rear gas generator support assemblies Boroscope access holes are provided in the top of the casing to enable examination of the CT stator and rotor blades Compressor Turbine Nozzle Assembly Stage 1 and Duct Within the Compressor Turbine Nozzle Assembly Stage 1 and Duct are housed the CT1 nozzle segments the combustion chamber transition ducts and the CT 2 nozzle assembly Also with the CT...

Page 7: ...ng Air System Compressor air is used for sealing at labyrinth seals and cooling of high temperature components Refer to the COOLING AND SEALING AIR SYSTEM DIAGRAM SGT 400 MW 2 1 located in this Manual Volume Medium pressure air taken from the bleed band at the seventh stage of the compressor is used to Pressurize the inlet labyrinth seal Pressurize the labyrinth seals located either side of the co...

Page 8: ...d TC227 positioned in the appropriate bearings measure journal and thrust bearing temperatures Speed monitoring Speed probes SD20 to SD23 are used for speed detection and overspeed protection in the gas generator and speed probes SD24 to SD27 are used for speed control indication and overspeed protection in the power turbine Probes monitor from the gas generator rotor shaft and power turbine rotor...

Page 9: ...tarting sequence as the compressor speed increases control air is bled from the delivery stage of the compressor and routed through a pilot valve XV60 onto the piston of the interstage bleed valve XV59 As the air pressure increases the piston is pushed to its full extent of travel thus closing off the air being vented to atmosphere Operation of the pilot valve is achieved by instrument air control...

Page 10: ...iliary gearbox is mounted via an adaptor ring directly off the gas generator inlet bearing housing and driven from the gas generator shaft It contains the necessary auxiliary drives for the hydraulic starter motor and its associated clutch and the main lubricating oil pump ...

Page 11: ...cating oil tank is integrated into the underbase fabrication and is provided with internal baffles to aid circulation and maximize removal of entrapped air Covers are provided to facilitate cleaning of the interior if contamination occurs The tank is fitted with immersion heater s to maintain the correct pre start oil temperature Integral thermal protection is provided Flip lid filler point s with...

Page 12: ...e lubricating oil prior to its entry into the main supply line Flow to the cooler circuit is controlled by the temperature control valve XV428 Non return valves XV26 and XV27 are fitted in the supply and return lines to prevent the lubricating oil draining back to the tank when the turbine is shutdown Oil Mist Eliminator An oil mist eliminator XF7 is provided in the lubricating oil tank breather s...

Page 13: ... housing XF4 is fitted with a pop up indicator button to provide a visual indication of filter blockage Lubricating Oil Tank Level Monitoring A level transmitter LT1 is used to monitor the level of the oil in the lubricating oil tank The information provided is used to inhibit starts if the oil level is below a set value during the gas turbine starting process and to annunciate a warning or shutdo...

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Page 15: ...V150 XM26 pilot fuel control valve actuator assembly XV149 XM27 electronic control unit system monitoring and control instrumentation pipeline trace heating if applicable Gas Fuel System Components Off Skid Block and Vent Valve The block and vent valve assembly is located in the customers gas supply line The assembly comprises of a block valve XV30 and a vent valve XV31 Both valves are controlled ...

Page 16: ...ed by instrument air and spring pressure The instrument air supply to the actuators is controlled by pilot solenoids SOL5 and SOL110 The block valves are designed to fail in the closed position Vent Valve The vent valve XV212 provides for venting of the gas fuel pipework between the two block valves on turbine shutdown The valve is controlled by an integral actuator operated by instrument air and ...

Page 17: ...Position Monitoring Position switches ZS12 and ZS45 monitors the open closed position of the off skid block valve and switches ZS44 and ZS11 monitor the open closed position of the off skid vent valve Position switches ZS178 and ZS5 monitor the open closed position of the primary on skid block valve switches ZS207 and ZS208 monitor the open closed position of the secondary on skid block valve and ...

Page 18: ...nd programmable controller and provides low and high temperature shutdown signals Burner Instrumentation Six temperature sensors TC255 TC260 mounted in each of the burner assemblies continuously monitor burner operation and provide operational data to the turbine control system Fuel System Requirements Refer to the SIEMENS Fluids Specification 65 0027 which is located in this Manual Volume for mor...

Page 19: ...d shutdown signals Air Distribution System Components Instrument Air Manual Shut Off Valve and Filter Assembly A manual shut off valve HV220 and filter XF102 assembly is located in the instrument air supply pipework The shut off valve facilitates manually isolation of the system for maintenance purposes The filter provides filtration of the instrument air supply to remove particles above 5 microns...

Page 20: ... engine through a filter XV187 and pressure control valve PCV150 during normal engine operation A non return valve XV430 prevents P2 air from entering the main instrument air system during normal engine operation Engine Auxiliary Module Instrument air is supplied via process airlines to the engine auxiliary module for pressurization of the engine seals and to the instrument air manifold Combustion...

Page 21: ...ription The ignition system consists of a high energy spark generator mounted in the underbase with each combustor flame tube having its own igniter assembly IG1 to IG6 which is permanently fixed The units are connected with high tension leads enclosed in an armored conduit High Energy Spark Generator The high energy spark generator is a capacitor discharge system encapsulated within a steel enclo...

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Page 23: ...ter motor run up the position of the variable geometry inlet guide vanes and stator blades are adjusted by the variable geometry stator actuator to optimize aerodynamic conditions for the starting cycle Prior to ignition the turbine compressor interstage bleed valve is used to bleed compressor air to atmosphere to reduce the start up power requirements and prevent compressor surge The Schematic Di...

Page 24: ...e Starter Clutch The hydraulic motor is mounted to the auxiliary gearbox through a high speed overrunning clutch During start up the motor clutch has a positively engaged connection to the auxiliary gearbox The hydraulic motor runs the turbine up to its ignition speed Upon ignition the turbine speed increases further which causes the clutch to disengage The design of the starter clutch enables re ...

Page 25: ...is located in this Manual Volume Underbase A single piece underbase of fabricated steel construction which incorporates an integral lubricating oil tank provides mounting points for the main turbine gearbox support and the turbine combustion casing support Torque reactions from the turbine gearbox are transmitted from the fabrication to the foundations through the multiple mounting pads and founda...

Page 26: ...parator with hood or a weather hood and bird screen dependant upon the specific site conditions The main filter section comprises of a coalescer filter panel The final stage consists of a vane separator Negative Pressure Ventilation Fan s if applicable Motor driven fan s XM6 and if applicable XM7 are mounted in the ventilation outlet duct to provide a flow of air through the enclosure The system i...

Page 27: ...s of a vane separator for the inertial interception and removal of bulk water caused by high humidity rainfall or sea spray The filter housing is provided with a side or front access door for servicing of filter elements and gas detectors when fitted Where anti icing is required a heat exchanger is mounted onto the front of the filter and provided with hot exhaust gases ducted from the exhaust sys...

Page 28: ...encer reduces noise emissions from the turbine exhaust Acoustic and Thermal Lagging To meet site requirements the exhaust system may be acoustically and thermally lagged downstream of the acoustic enclosure up to the silencer or waste heat recovery unit where applicable excluding flexible joints As a minimum the lagging is sufficient to ensure the outer surface of the cladding is restricted to 55º...

Page 29: ...urs System Control and Operation A twin shot system provides initial and reserve extinguishant charges If a fire is detected either via the heat detector s or via infrared flame detectors then the turbine all AC power supplies and fuel is shut down and isolated After a short time delay the initial charge of extinguishant is released and the DC motor driven emergency lubricating oil pump automatica...

Page 30: ... entering the enclosure vent inlet The detection of gas by any single gas detector will provide fault and low high alarm level signals Operation of the low level alarm will give an audible warning Operation of the high level alarm will initiate a turbine and turbine enclosure ventilation fan shutdown Combustion air inlet if applicable Two gas detectors GD6 GD11 are provided suitably located to det...

Page 31: ... signal from the turbine control module or by manual actuation from the breakglass units located on corners of the turbine enclosure package optional and one located on the turbine control module The bottles give the capacity for an initial automatic or manual release of extinguishant followed by the option of another automatic or manual reserve release Both sets of bottles may be manually fired b...

Page 32: ...76 and ZS99 indicate when the enclosure ventilation dampers are in the Closed position Isolation Valve Position switches ZS384 and ZS235 monitor the C02 Isolation valve in the Open and Closed positions respectively Fire Extinguishant Bottles Position Switches ZS749 and ZS748 monitor the Initial C02 second bottle and first bottle low contents respectively Position Switches ZS751 and ZS750 monitor t...

Page 33: ...nd bearings the stator corepack and the cooler which is mounted on top The exciter and PMG stators are fixed to a bracket mounted on the end bracket at the non drive end NDE Terminals are mounted off the frame either all on one side or lines one side and neutrals on the other as required The information contained within this section provides an overview of a typical generator and associated equipm...

Page 34: ...tion of the gas turbine engine turning the rotor via the gearbox An automatic voltage regulator AVR provides and controls the DC power for the excitation of the generator A power factor VAr control circuit enables the generator to operate at constant power factor or constant VAr s when in parallel with other generators or with the public supply The overcurrent limit circuit protects the AVR and ge...

Page 35: ...control signals and monitoring for all the turbine systems and associated instrumentation to allow safe starting normal running and shutdown of the gas turbine The system which is microprocessor based provides control and monitoring which includes Turbine sequencing and protection Fault monitoring Annunciation Gas turbine speed control and temperature monitoring Back up protection for safety relat...

Page 36: ...selections via a menu system The Human Machine Interface HMI includes on screen data trending facilities Screens display the information in various formats including pictorial and tabular and can incorporate live data and animation All text on the HMI is in the native language A typical selection of main menu functions available on the display is listed below 1 Unit Operation This is the main page...

Page 37: ...mentation and electrical interface but would typically include Monitoring of the Shutdown Sequencing and Protection relays Generator Control Panel Speed Control and synchronizing unit interface Instrument Fault Monitoring Message Annunciation Generator Winding and Bearing Temperature Monitoring and Protection Generator Cooling Control and Monitoring Vibration Monitoring of the generator non driven...

Page 38: ...d alarms the system controller also has Ethernet communication capabilities 24 Volt Batteries 24 volt NiCad battery plastic cased consisting of 20 cells having a nominal capacity of 550Ah The cells are designed for optimal operating in an ambient of 25ºC The cells are mounted on a battery rack 24 Volt DC Battery Charger The 24 volt battery charger is housed in a freestanding steel cubicle The equi...

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