RESPONSABILITATI / BENEFICII:
Our commissioning team at site is represented by four disciplines:
Electrical,
Controls (I&C),
Water Steam Cycle (WSC)
Gas Turbines.
The Commissioning Manager (COMM) is responsible for all activities on site within and related to commissioning.
The Commissioning Lead Engineers (ComLead) are reporting to the Commissioning Manager and are technically responsible for their scope / discipline.
The Commissioning Engineers (ComEng) are the ones carrying out the commissioning work in the field (hands-on).
Important to understand is that the instrumentation in the filed is done by the mechanical process engineers (WSC and GT). They are as well responsible for the process and related systems and it's start-up and operation.
The I&C engineers are responsible for the control system and the programming/modification of the software.
The electrical commissioning engineers are responsible for the HV equipment and the power distribution within the plant.
Please find here the detailed requirements for the four disciplines in regards to position and qualifications:
1. Water Steam Cycle (WSC) / Steam Turbine (ST) / Balance of Plant (BOP) / Heat Recovery Steam Generator (HRSG):
Within the WSC team we have 4 different disciplines which are commissioned separately from one or more engineers depending on the size of a project. The commissioning starts with the hand over from erection, when the installation of the equipment, hydrostatic tests and system cleaning and flushing, loop checks (cabling point to point) and Electrical insulation tests are already done.
Within the first part, the cold commissioning the following tasks are covered:
• Verify installation according P&ID
• Signal check from field to DCS
• Function check of equipment (rotation check,…)
• Adjustment of equipment (switches, valves, transmitters,…)
• Protection checks
• Initial start-up of system and operation checks
Within the second part, the hot commissioning the following tasks are covered:
• Steam dumping or Steam blow
• 1st steam by-pass operation
• Run-up of Steam Turbine
• Base load adjustments
• Plant / equipment transient testing (start-up, shut down, load variations)
• Dynamic testing (load rejections, equipment trips, stand-by equipment,…)
• Performance Test
• Reliability Run
The responsibility in the separate disciplines are as follows:
WSC - Steam lines from boiler to ST, Bypass system, Main condensate system,
ST - Steam turbine incl main control and stop valves and auxiliary systems
BOP - All auxiliary systems which do not belong to the other disciplines as main cooling water, water supply, fuel gas/oil supply, control and power air system also
HRSG - All systems and sub systems of the HRSG incl Drums, blow down system, drains
Chem - Dosing and sampling system for feed water conditioning, Analyses while operation, Water treatment plant knowledge required in some cases
For these jobs we're looking for experienced commissioning engineers with hands-on experience out in the field for the cold commissioning tasks as well with detailed system and process knowledge necessary for the hot commissioning. This is a combination of the instrumental technicians and commissioning supervisors in one person. A split is not considered.
The experience should be won in combined cycle power plants or steam power plants. For BOP oil and gas industry experience is welcome as well.
Currently the following Positions on the Projects listed above are scheduled:
2. Electrical:
The Electrical ComE EL should have at least deep knowledge in one of the core competence. Below are the required system type which are used in our Power Plants.
Excitation Systems: P320 V1 and V2, ABB MEGATROL (PEC800), CONVERTEAM (Logidyn2/LogiCAD, Semipol D2/D3)
Protection Systems: ABB Protection REG 216, MICOM Protection (P344/345, P633, P123)
SFC: ABB LCI (PEC 800), CONVERTEAM (Logidyn2/LogiCAD, Semipol D2/D3)
GCB: ABB HECS XL, AREVA Areva FKG2M
Generator: H2-Generator with auxiliary -> seal oil, CO2/H2 system
Additional to the system knowledge, the Electrical ComE has to have the understanding of the commissioning sequence / test steps from start up (temp. supply, Battery charging/discharging) until Generator gets synchronized to grid and load up to base load. By means he has to have the overall knowledge for Electrical Power Plant from start up commissioning up to load testing of the Generator.
The overall knowledge of the Power Plant will enable him to write commissioning procedure such as:
- requirement/test sequence till 1st Energizing (Backfeed) of Generator Step up Transformer
- Interlocking / intertripping test procedures between different El. System and HV interfaces
- no load / load test steps and sequence of testing including short-circuits test.
The ComE EL has to be a "hands-on" commissioning engineer and be able to work with special test equipment such as OMICRON, SVERKER, HIOKI fast memory recorder or similar test equipment. As well good IT/PC knowledge is required that enable communication with HMI's.
3. Gas Turbines:
On the Gas Turbine commissioning our duties start with the support to erection for the start up of the Lube Oil Pumps for the flushing. After taking over of each system from erection, all instruments and its cabling loops are checked for correct setting of the transmitter and data transmission from the field instrument up to the Input Card of the Control System. Together with the responsible I&C commissioning engineer, the signal value on the data bus of the control system is verified. Having the signals checked, the drives are commissioned, following the function groups are started up and commissioned. With all function groups finalised, the Gas Turbine can be started up and commissioned on part and full load. Having the Gas Turbine in a Combined Cycle Power Plant, all operations for start up and load tests are required to be coordinated with the water steam cycle commissioning schedule.
the following Main Systems are supplied:
• Oil Systems with Lube Oil, Power Oil and Jacking Oil
• Closed Cooling Water System for the Lube Oil and Generator Cooling
• Cooling Air Systems on the Gas Turbine
• Filter house and Air Intake
• Thermal Block
• Fuel Systems for Fuel Gas, Fuel Oil, Nox Water and N2 Purge Systems
• Exhaust System
For each GT the following Auxiliary Systems are in the GT commissioning scope:
• Sound Enclosure and Ventilation Systems
• Gas Detection and Fire Fighting Systems
On numerous Projects the GT Crew is responsible for the Fuel Gas and Fuel Oil Systems on the BOP, too:
• Fuel Gas BOP: Gas Metering, Scrubber and Filters, Gas Heater and Pressure Reducing Stations and Gas Compressors.
• Fuel Oil BOP: Fuel Oil Metering and Forwarding Station, Unloading and Storage Tank.
For the GT commissioning engineers we are searching for engineers with experienced in commissioning execution - hands on working in the field - during the last 10 years.
Preferably, the candidates were involved in earlier new commissioning or re-commissioning projects of GT26, GT24 or GT13E2 Gas Turbines.
We are not working as Commissioning Supervisors or Commissioning Advisors on our Projects.
4. Controls (I&C)
The I&C Commissioning on a Combined Cycle Power Plant consist of the following activities:
First Power-Up of the System
Initial software loading
Signal checks (supported by the Process engineer in the field)
Communication between the different systems.
Function and logic checks (supported by the process engineer)
On most of our plants we have several different control systems, following control systems are normally used:
Egatrol 8 : ABB, AC450 controller with AC160 controllers for Protection and Closed Loops
Egatrol 8M ABB, AC800M controller with AC160 controllers for Protection and Closed Loops
Turbotrol ABB,AC450 controller with AC160 controllers for Protection and Closed Loops
AC800M For ROP (rest of plant) ABB, AC800M Controllers with the ABB IIT800xA DCS
AC450 For ROP ABB, AC450 controllers with the ABB IIT800xA DCS
TGC Alspa ALSPA P320 or ALSPA v5, v6, Controsteam
ALSPA For ROP ALSPA P320, ALSPA v5 or ALSPA v6 with ALSPA DCS
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