31 9100 9073 e 2005 03

DRAWING/DOCUMENT STATUS A FOR REFERENCE 2006-04-10 First issue Steenmeyer DATE DESCRIPTION Bearb Coord Rev Liedtke Sudhoff Geprüft Checked APPD PROJECT : CAMAU 750MW COMBINED CYCLE POWER PLANT OWNER : OWNER’S ENGINEER : PETRO VIETNAM CPMB CONTRACTOR : CONTRACTOR’S ENGINEER : LILAMA CORPORATION FICHTNER SUBCONTRACTOR’S NAME : SUBCONTRACTOR’S SUPPLIER : s POWER GENERATION DRAWING TITLE : System Description Hydraulic Oil For Fuel Oil PKZ UAS Contents Code Ursprung/Original Reg No UNID Urspr.-PKZ-Nr Orig.-PC Ursprung-Nr./Original-No Projekt/Project gezeich Drawn bearb Coord geprüft Checked Abtlg Dept PKZ/PC Datum Date Name 06-04-10 STEENM 06-04-10 LIEDTKE 06-04-10 SUDHOFF P415 sgd s AG POWER GENERATION CA MAU CCPP VIT154 Maßstab Scale UA/DCC Type Inhaltskennzeichen Contents Code N/A A4 Benennung/Title System Description Hydraulic Oil For Fuel Oil Dienstst./Dept P415 UNID 423216774 XS00 MBX Zähl.-Nr Reg.-No Index/Rev 355057 Version A Blatt-Nr./Page-No CM1-L1-M-MBX.08-355057 Erstellt mit/designed with of Ersatz für Supersedes Gas Turbine Description of Auxiliary Systems Hydraulic Control Equipment Hydraulic Oil for Fuel Oil Refer also to: List of Control Settings (SREL) List of Measuring Instruments List of Electrical Loads Equipment List P+I Diagram, Fuel Oil Hydraulic Oil System P+I Diagram, Hydraulic System P+I Diagram, Hydraulic Oil for Fuel Oil System 3.1-0210 3.1-0220 3.1-0230 3.1-0240 3.1-4010 3.1-9000 3.1-9010 3.1-9110 The control system proper—i.e the speed controller, load controller, temperature controller, the startup and shutdown controller, together with the hydraulic oil supply station which supplies the valve actuators—is described elsewhere FO HÖ-VB-SSV PO FL ESV MBN23AA051 MBN23AA051 Premix burners VB Settings, limits and measuring ranges of the items of equipment listed here are given in the List of Measuring Instruments, Equipment List and List of Control Settings (SREL) This description only gives guideline values FO feed line Ölvorlaufleitung Diffusion burners DB FO DO FL SSV HÖ-DBVL-SSV HÖ-DBVL-SV FO DO FL CV/ESV MBN14AA051 MBN14AA051 MBN14AA151 MBN14AA151 The reproduction, transmission or use of this document or its content is not permitted without express written authority Offenders will be liable for damages All rights, including rights created by patent grant or registration of a utility model or design, are reserved Overview The valve control devices position and switch the valves by controlling the hydraulic oil supplied to the valve actuators as appropriate, to provide the required fuel flow for the various operating modes of the gas turbine The configurations of the emergency stop and control valves are illustrated in Fig 1, valve designations are as follows: − FO PO FL CV/ESV: Fuel oil premix feed line control valve with emergency stop function − FO DO FL CV/ESV: Fuel oil diffusion feed line control valve with emergency stop function − Class: RESTRICTED FO return line Ölrücklaufleitung This description covers the actuators of the safety shutoff devices (emergency stop valves) and the control valves in the fuel oil system The valve actuators are essentially comprised of the hydraulic cylinder and the associated control devices which are integrated into the actuator housing This results in compact actuator units FO DO RL CV: Fuel oil diffusion return line control valve with shutoff function Fig1: FO DO RL CV FO DO RL ESV HÖ-DBRL-SSV HÖ-DBRL-SV MBN53AA151 MBN52AA051 MBN53AA151 MBN52AA051 SGT-1000F, SGT5-3000F, SGT5-4000F, and SGT6-4000F Fuel Oil Valves PO: Premix Operation, DO: Diffusion Operation The KKS identifiers of the control and emergency stop valves and the respective function levels of the associated actuator, measuring and control devices are listed in Table FO PO FL CV/ESV MBN23AA151 Function level Actuator devices MBX87 FO DO FL CV/ESV MBN14AA151 MBX88 FO DO RL CV MBN53AA151 MBX86 FO PO FL ESV MBN23AA051 MBX77 FO DO FL ESV MBN14AA051 MBX75 FO DO FL ESV MBN52AA051 MBX79 Valve KKS Emergency stop valve − FO PO FL ESV: FO premix feed line emergency stop valve Table 1: − FO DO FL ESV: Fuel oil diffusion feed line emergency stop valve Valve Actuators—General − FO DO RL ESV: Fuel oil diffusion return line emergency stop valve In each of these cases, an emergency stop valve and a control valve are connected in series As a matter of principle, the control valves are located downstream of the emergency stop valves Siemens AG Power Generation HÖ-VB-SV FO PO FL CV/ESV MBN23AA151 MBN23AA151 Allocation of KKS Designations The basic configuration and materials of the actuators used with all six control and emergency stop valves (MBX75/77/79/86/87/88AS002) are identical The actuator is mounted on the valve stem flange It is comprised of a hydraulic cylinder and a spring which closes the valve and is integrated into the actuator unit The piston area is identical in the two cylinder plenums and pressure 3.1-9100-9073/1 0305E-X Gas Turbine Description of Auxiliary Systems is applied from one side only The valve can only be opened when the actuator is supplied with hydraulic fluid under pressure The spring in the actuator applies the force necessary to close the valve The piston rod is made of stainless steel and has a hard chromium finish Two inductive position sensors (MBN14/23/53AA151B01/B02) with integrated electronics and plug connection are mounted on the piston rod of each actuator The OPEN and CLOSED positions of the emergency stop valves are each monitored by two inductive position limit switches mounted on the actuator piston rods (MBN14/23AA051-S11, -S12, -S21, -S22) The actuators of the two feed line control valves are of an identical design The same applies to the actuators of the two emergency stop valves in the feed lines The reproduction, transmission or use of this document or its content is not permitted without express written authority Offenders will be liable for damages All rights, including rights created by patent grant or registration of a utility model or design, are reserved Control devices are implemented in the actuator housings in line with the respective task requirements and are explained in the following text Control Devices—General Each of the control devices (MBX75/77/79AS001 and MBX86/87/88AS001) is connected to the hydraulic supply station by one feed and one return line The two control devices (MBX87/88AS001) associated with the feed line control valves are identical and therefore described jointly By the same token, the control devices MBX75/77AS001 associated with the actuators of the feed line emergency stop valves—FO DO FL ESV (MBN14AA051) and FO PO FL ESV (MBN23AA051)—are also identically described in the following text Each of the control devices is protected by a pressure filter (MBX75/77/79/86/87/88AT002) with a 10 µm mesh size An optical fouling display (MBX75/77/79/86/87/88CP501) is provided to permit monitoring of the fouling of each filter, individually A color-coded indication is displayed locally if the response pressure of the fouling monitor is exceeded Class: RESTRICTED Control Devices of the Feed Line Control Valves The control devices (MBX87/88AS001) of the feed line control valves are each comprised of a servo valve (MBX87AA101 / MBX88AA101), a 2-way cartridge valve) MBX87AA052 / MBX88AA052, a solenoid pilot valve MBX87AA002 / MBX88AA002 as well as the measuring points (MBX87CP401 - MBX87CP404 and MBX88CP401 MBX88CP404) and a dedicated pressure filter (MBX88AT002 / MBX87AT002) Siemens AG Power Generation Hydraulic Control Equipment Hydraulic Oil for Fuel Oil In normal operation, the solenoid pilot valve (MBX87AA052 / MBX88AA002) is energized As a result, the upper plenum of the spring-loaded control piston in the cartridge valve (MBX87AA052 / MBX88AA052) is pressurized, thus closing the cartridge valve and preventing the hydraulic fluid from draining from the lower plenum of the actuator through the cartridge valve and into the upper actuator plenum and/or to the return line to the tank In this condition, actuator piston travel can be controlled by the two-stage servo valve (MBX87AA101 / MBX88AA101) This servo valve is comprised of an initial pilot stage with a permanent magnet control motor (torque motor), a hydraulic preamplifier (employing a nozzle impingement plate system) and a second stage comprised a spool-type control valve with four metering edges The second stage also functions as a hydraulic power amplifier The valve actuator, together with the control device, is an integral component of the control circuit The position controller sends a positioning signal to the servo valve (MBX87AA101 / MBX88AA101) in the form of a loadindependent current, which changes the flow of hydraulic oil from the oil supply station at a level proportional to the signal current, but with a much greater amplification A positive current at the controller output opens the fuel oil control valve and a negative current closes it The greater the current, the faster the fuel oil control valve opens or closes The hydraulic settings of the servo valve are such that in the event of a loss of electric power supply (e.g broken wire) the fuel oil feed line control valve always assumes its CLOSED position To open the valve, hydraulic oil is supplied to the lower plenum via the metering edges of the second stage Upward piston travel compresses the closing spring and displaces the hydraulic fluid from the upper plenum into the return line to the tank To close the valve, a connection is opened between the lower plenum and the upper plenum and/or tank return line via the metering edges of the second stage The valve is closed by spring force, forcing hydraulic oil from the lower plenum through the servo valve and into the upper plenum and/or the return line to the tank Actuator piston travel is registered by two non-contact position sensors (MBN14AA151-B01/B02 or MBN23AA151-B01/B02) These sensors output an analog current signal that is taken as the actual position and fed back to the position controller The FO DO FL CV/ESV and the FO PO FL CV/ESV are components of the dual element shutoff device in the supply line to the FO diffusion and FO premix burners, respectively In addition to controlling the amount of oil 3.1-9100-9073/2 0305E-X The reproduction, transmission or use of this document or its content is not permitted without express written authority Offenders will be liable for damages All rights, including rights created by patent grant or registration of a utility model or design, are reserved Gas Turbine Description of Auxiliary Systems supplied, they are also used to rapidly and reliably shut off the fuel mass flow to the FO burners when necessary wire) the fuel oil return line control valve always assumes its OPEN position Closure of the control valve in the event of trip is triggered by deenergizing solenoid pilot valve MBX87/88AA002 (deenergize-to-trip principle) Deenergization of the solenoid pilot valve depressurizes the lower plenum, allowing the spring to rapidly close the emergency stop valve Control oil acting on the actuator piston of the 2-way cartridge valve is depressurized and flows back to the tank Hydraulic oil pressure generated by the spring (MBX87AS002 / MBX88AS002) in the hydraulic cylinder opens the spring-loaded control piston of the 2-way cartridge valve and the hydraulic oil in the lower plenum flows through the 2-way cartridge valve into the depressurized space above the piston (upper plenum) The spring force of the preloaded closing springs acting on the control piston is so low that only a slight pressure differential between connections A and B is required to hold the 2-way cartridge valve closed Consequently the 2way cartridge valve is capable of switching large oil flows at low pressure drop, thus ensuring that the FO control valve actuator achieves short closure times The spring reliably closes the control valve To increase control valve lift, the flow of hydraulic fluid is directed across the metering surface of the second stage into the lower hydraulic cylinder plenum Upward piston travel compresses the closing spring and displaces the hydraulic fluid from the upper plenum into the tank The closing force for the actuator is generated by the spring, i.e the servo valve is actuated such that hydraulic oil is displaced by spring force from the lower to the upper plenum via the servo valve Actuator piston travel is registered by the non-contact position sensor This sensor outputs an analog current signal that is taken as the actual position and fed back to the position controller Control Devices of the Return Line Control Valve The actuator for the FO DO RL CV (MBN53AA151) in the return line of the fuel oil burner system includes the control device (MBX86AS001) The latter, essentially comprised of a servo valve (MBX86AA101), a pressure filter (MBX86AT001) and two measuring points (MBX86CP401/402/404) Servo valve MBX86AA001 controls actuator piston travel It comprises a pilot stage with a torque motor and hydraulic preamplifier and a second stage with a pilot valve that has four metering edges The second stage also functions as a hydraulic power amplifier The valve actuator, together with the control device, is an integral component of the control circuit The position controller sends a positioning signal to the servo valve in the form of a load-independent current, which changes the flow of hydraulic oil from the oil supply station at a level proportional to the signal current, but with a much greater amplification A positive current at the controller output opens the fuel oil control valve and a negative current closes it The greater the current, the faster the fuel oil control valve opens or closes Class: RESTRICTED Hydraulic Control Equipment Hydraulic Oil for Fuel Oil The hydraulic settings of the servo valve are such that in the event of a loss of electric power supply (e.g broken Siemens AG Power Generation Control Devices of the Feed Line Emergency Stop Valves The control devices of the feed line emergency stop valve actuators (MBX75AS001 / MBX77AS001) are each essentially comprised of one solenoid opening valve (MBX75AA031 / MBX77AA031), one 2-way cartridge valve (MBX75AA051 / MBX77AA051), one solenoid pilot valve (MBX75AA001 / MBX77AA001), one pressure filter (MBX75AT001 / MBX77AT001) as well as the measuring points (MBX75CP401 - MBX75CP404 or MBX77CP401 - MBX77CP404) To open the emergency stop valve, the solenoid pilot valve (MBX75/77AA001) and the solenoid opening valve (MBX75/77AA031) are energized, the latter, with a slight delay Energizing the solenoid pilot valve (MBX75AA001 / MBX77AA001) pressurizes the upper plenum of the springloaded piston in the cartridge valve (MBX75AA052 / MBX77AA052), thus closing the cartridge valve and preventing the hydraulic fluid from draining from the lower plenum of the actuator through the cartridge valve and into the upper actuator plenum and/or to the return line to the tank Subsequent energizing of the solenoid opening valve (MBX75AA031 / MBX77AA031) supplies hydraulic fluid to the lower plenum Upward piston travel compresses the closing spring and displaces the hydraulic fluid from the upper plenum into the return line to the tank Closure of the emergency stop valve (MBN14AA051/ MBN23AA051) in the event of trip, is triggered by deenergizing solenoid pilot valve (MBX75AA001/ MBX77AA001) (deenergize to close principle) Deenergization of the solenoid pilot valve depressurizes the lower plenum, causing the spring to rapidly close the emergency stop valve Control oil acting on the actuator plenums of the 2-way cartridge valves is depressurized and 3.1-9100-9073/3 0305E-X flows back to the tank Hydraulic oil pressure generated by the spring in the hydraulic cylinder (MBX75AS002 / MBX77AS002) opens the spring-loaded control piston of the 2-way cartridge valve and the hydraulic oil in the lower plenum flows through the 2-way cartridge valve into the depressurized space above the piston (upper plenum) The spring force of the preloaded closing springs acting on the control piston is so low that only a slight pressure differential between connections A and B is required to hold the 2-way cartridge valve closed Consequently, the 2way cartridge valve is capable of switching large oil flows at low pressure drop, thus ensuring that the emergency stop valve actuator achieves short closure times The spring reliably closes the emergency stop valve When the trip signal is received, the solenoid pilot valve (MBX75AA00/ MBX77AA001) and the solenoid opening valve (MBX75AA03/ MBX77AA031) are simultaneously deenergized This interrupts the connection to the pressure line Fail-safe, rapid closure of the valve is, however, ensured by deenergization of the solenoid pilot valve alone Control Devices of the Return Line Emergency Stop Valve The control device MBX79AS001 associated with the emergency stop valve located in the fuel diffusion burner system return line is essentially comprised of a solenoid Hydraulic Control Equipment Hydraulic Oil for Fuel Oil valve MBX79AA002 required for opening and closing, pressure filter MBX79AT002 and measuring points MBX79CP401/402/404 The OPEN and CLOSED positions of the emergency stop valve MBP13AA051 are each monitored by two inductive position limit switches located in the actuator unit (MBN14/23AA051-S11, -S12, -S21, -S22) Closing of the emergency stop valve is achieved by deenergizing solenoid valve MBX79AA002 (deenergize to close principle) The solenoid valve is equipped with a closing spring which is compressed when the solenoid coil is energized Consequently the fail-safe emergency stop valve is closed if voltage supply to the solenoid is interrupted When solenoid valve MBX79AA002 is energized, hydraulic fluid flows into the lower plenum and displaces the piston upward This displaces hydraulic fluid in the upper plenum into the return line This interaction opens the emergency stop valve The closing spring of the emergency stop valve is now compressed Deenergization of the solenoid valve depressurizes the lower plenum, causing the closing spring to rapidly close the emergency stop valve In the event of a trip, hydraulic oil present in the lower plenum flows into the upper plenum and/or the return line to the tank Class: RESTRICTED The reproduction, transmission or use of this document or its content is not permitted without express written authority Offenders will be liable for damages All rights, including rights created by patent grant or registration of a utility model or design, are reserved Gas Turbine Description of Auxiliary Systems Siemens AG Power Generation 3.1-9100-9073/4 0305E-X ... line to the tank To close the valve, a connection is opened between the lower plenum and the upper plenum and/or tank return line via the metering edges of the second stage The valve is closed... Fuel Oil The hydraulic settings of the servo valve are such that in the event of a loss of electric power supply (e. g broken Siemens AG Power Generation Control Devices of the Feed Line Emergency... the emergency stop valve is now compressed Deenergization of the solenoid valve depressurizes the lower plenum, causing the closing spring to rapidly close the emergency stop valve In the event