The combined cycle power plant is being installed in increasing numbers around the world where there are substantial supplies of natural gas. Yokogawa’s power experts deliver total instrumentation and control solutions.
Challenges
Customer Challenge
Improving power plant efficiency
Solution
Yokogawa helps power plants operate more efficiently by improving the control of fuel, steam, and feed water.
Enabling Technologies
CENTUM VP Integrated Production Control System
The CENTUM VP integrated control system secures interruption-free “uptime only” plant performance for optimal productivity and profitability in the renewable energy field.
Transmitter
The DPharp series of digital pressure transmitters use a differential pressure high accuracy resonance pressure (DPharp) sensor that represents one of the most revolutionary advances in transmitter technology.
Zirconia Oxygen Analyzers
Yokogawa’s zirconia oxygen analyzers are used for combustion monitoring and control applications and are relied on by a wide range of industries to optimize combustion and reduce NOX emissions.
Plant Service
Commissioning, operator training, operation, maintenance, and simulation services
Customer Challenge
Improving combustion efficiency and reducing/eliminating harmful stack emissions
Solution
Yokogawa oxygen analyzers measure the oxygen (O2) concentration in flue gas. With this information, the air-fuel ratio can be adjusted to optimize combustion. Likewise, our stack gas analyzers can be used to reduce harmful emissions by measuring the concentrations of nitrogen oxide (NOX) and sulfur oxide (SOX) in stack gas.
Enabling Technologies
ZR Series Zirconia Oxygen Analyzers
Yokogawa’s zirconia oxygen analyzers are used for combustion monitoring and control applications and are relied on by a wide range of industries to optimize combustion and reduce NOX emissions.
SG Stack Gas Analyzer
The SG stack gas analyzer consists of an infrared gas analyzer unit, a zirconia oxygen analyzer unit, and a sampling unit, and can simultaneously measure up to five components: NOX, SO2, CO2, CO, and O2.
Customer Challenge
Reducing the emission of CO, NOX, dioxins, and other substances into the atmosphere by burning off residual gas components in the stack gas
Solution
Yokogawa gas analyzers measure the oxygen concentration in the stack gas so that adjustments can be made in the O2 supply that will improve combustion efficiency and burn off more residual gas components.
Enabling Technologies
CENTUM VP Integrated Production Control System
The CENTUM VP integrated control system secures interruption-free “uptime only” plant performance for optimal productivity and profitability in the renewable energy field.
ZR Series Zirconia Oxygen Analyzers
Yokogawa’s zirconia oxygen analyzers are used for combustion monitoring and control applications and are relied on by a wide range of industries to optimize combustion and reduce NOX emissions.
TDLS Laser Gas Analyzer
The TruePeak TDLS gas analyzer relies on a proprietary peak area integration method and is ideal for in-situ analysis in harsh process environments. It significantly improves the efficiency of boiler operations.
SG Stack Gas Analyzer
The SG stack gas analyzer consists of an infrared gas analyzer unit, a zirconia oxygen analyzer unit, and a sampling unit, and can simultaneously measure up to five components: NOX, SO2, CO2, CO, and O2.
Customer Challenge
Prevent fire accident in coal yard, transmission, and any other facilities.
Solution
Distributed Temperature Sensor (DTS) provided by Yokogawa contributes fire detection, Leak/Plugging Detection, Hot (Cold) Spot Monitoring, and Facilities Preventive Maintenance.
Enabling Technologies
Distributed Temperature Sensor (DTS)
Yokogawa DTSX makes possible gapless detection and monitoring up to 50km.
Details
Combined Cycle Power Generation Process
Combined cycle power generation requires the following control and optimization.
Unit control: boiler/ burner management/ turbine/ balance of plant/ flue gas desulfurization/ emergency shutdown
Plant optimization: plant information management/ operation efficiency improvement support/ alarm management
Resources
- Unified operator interface thanks to CENTUM CS 3000/UOI
- Automated plant startup and shutdown using new block sequences
- Advanced alarm management using consolidated alarm management software
Sandi Electricity Company selected Yokogawa to replace Foxboro IA Series at its power plant.
Yokogawa carefully extracted the configuration of old systems and successfully replaced with CENTUM VP and ProSafe-RS.
- Easy set point definition for all plant power generation operations
- Stable electric power generation
- Power plant optimization
- Control of electric power generation based on net performance
- Fully automated power plant supplies steady flow of electricity to national grid
- The CENTUM CS 3000 plays a core role by controlling and enabling the monitoring of all processes at the EGCO Cogen plant
- CENTUM CS3000 seamlessly integrates with multivendor control systems through OPC interface.
- Challenging predictive maintenance to monitor many transmitter data through PRM.
- The visualization of data using the Exaquantum PIMS plays an important role in efforts to improve operations at this power station.
- To reduce operator workload and eliminate unplanned shutdowns, HERA decided on the use of field digital technology at this power station.
Seawater leak detection is the post-condensation water quality management processes. Damage to the ion exchange resin, which deionizes the supplied water, is also monitored during this process, and both of these applications are executed by a conductivity analyzer. (AN10D01P01-01E)
Cogeneration systems that improve overall energy utilization by simultaneously generating electricity and heat from a single fuel source have been in the news a lot recently. Distributed generation equipment, a type of cogeneration system, is driven by a gas or diesel engine. Advantages of the gas engine, which is widely used, include high thermal efficiency and secure fuel supply.
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