SPECIFICATIONS
Part No.: DS200TCEAG2BJE
Manufacturer: General Electric
Series: Mark V
Product type: Emergency Overspeed Board
Repair: 3-5 Days
Availability: In Stock
Country of Manufacture: United States (USA)
Functional Description
DS200TCEAG2BJE is an emergency overspeed board developed by GE. It is a part of Mark V control system. The Emergency Overspeed Board is installed in the Protective Core P1 of the Mark V system and plays a crucial role in high-speed protection circuitry. It is often referred to as the Protective Processor because of its responsibility in monitoring and responding to overspeed conditions. Within the P1 core, three TCEA boards work together, designated as X, Y, and Z processors. These processors operate redundantly, ensuring enhanced reliability and system safety.
Features
The board is capable of handling multiple protection and monitoring functions, including:
- Emergency Overspeed Protection: Detects and mitigates hazardous overspeed conditions.
- Automatic Synchronization: Brings in signals to assist in automatic generator synchronization.
- Flame Detection: Monitors and processes flame detection signals to ensure safe turbine operation.
- Low Shaft Speed & High Shaft Speed Detection: Monitors rotational speed for operational stability.
- All incoming signals are scaled and conditioned before being transmitted to the STCA board via the IONET (Input/Output Network) for further processing.
In the event of a critical fault or overspeed scenario, the TCEA board can initiate an emergency trip by sending signals to the TCTG (Turbine Trip Board). If a sufficient number of relay votes indicate a trip condition, the TCTG board executes the turbine shutdown procedure.
Connector Interfaces
The board is equipped with several connectors that enable communication and signal processing across the Mark V system:
- J7: TCEA Board Power Connector: Supplies power to the board.
- JK: TCEB Board Signals Connector: Handles input/output signals for the system.
- JL: TCTG Board Trip Signals Connector: Transmits emergency trip signals.
- JW: TCEB Board Flame Detection Signals Connector: Processes flame detection signals.
- JX1 and JX2: Daisy Chained IONET Signal Connectors: Facilitates network communication between boards.
TCEA Automatic Synchronizing Circuit
- The board plays a vital role in the automatic synchronizing circuit within the Mark V control system, ensuring that the turbine generator is properly aligned with the power grid before breaker closure. Proper synchronization prevents electrical disturbances and enhances grid stability.
- The synchronizing process begins with voltage signals from the bus and generator, which are received at the PTBA terminal board. These signals travel through the JV connector to the TCEB board, where they are further relayed via the JMP connector to the TCEA board. This step ensures accurate voltage data is available for synchronization calculations.
- Once the TCEA board receives the signals, it utilizes embedded software stored in EPROMs (Erasable Programmable Read-Only Memory) to perform speed matching and voltage matching functions. The system continuously checks that:
- The generator frequency matches the grid frequency.
- The generator voltage aligns with the line voltage.
- The phase angle difference between the generator and the grid remains within acceptable limits.
- When all these parameters meet predefined thresholds (as set by the I/O Configuration constants), the TCEA board sends a permissive signal to close the breaker, allowing the generator to synchronize with the grid.
- For an added layer of security, the board independently performs a synchronization check and generates a logic signal. This signal must be validated by the TCEA board before the breaker closure is permitted, preventing accidental synchronization errors.
TCEA Flame Detection Circuits
- The board is also responsible for processing signals from ultraviolet (UV) flame detectors, ensuring continuous monitoring of combustion within the turbine. Proper flame detection is crucial for preventing hazards such as flameout or uncontrolled combustion events.
- The process begins with flame signals from UV flame detectors, which are collected by the PTBA board in the P1 core. These signals travel via the JVA and JU connectors to the TCEB board, where they are then transferred to the TCEA board through the JK (JKX/Y/Z) connectors.
- Once the board receives the flame signals, it scales and conditions the signals for accurate processing. Uses internal algorithms to determine flame intensity and flame presence. The processed flame detection signals are then transmitted to the Control Sequence Program (CSP) in the R core, ensuring real-time monitoring of combustion conditions.
- The board sends flame detection data via the IONET to the I/O Engine, which then forwards it to the Control Engine. This seamless communication allows the turbine control system to make real-time decisions regarding combustion stability and safety.
- To ensure proper operation, the JW (JWX/Y/Z) connectors supply 335V DC power to the UV flame detectors, keeping them active and functional under all operating conditions.
World of Controls has the most comprehensive collection of GE Mark V components. Please contact WOC as soon as possible if you require any extra information.
Frequently Asked Questions
What is DS200TCEAG2BJE?
It is an emergency overspeed board developed by GE.
Where is the board located in the Mark V control system?
The board is located in the Protective Core P1 of the Mark V control system. It functions as part of the Protective Processor, working alongside other boards to monitor and protect turbine operations.
How many boards are used in the system?
Three boards are used in the P1 core of the Mark V system, identified as the X, Y, and Z processors. These processors work together to ensure redundancy and reliability in emergency overspeed protection.
How does the board contribute to automatic synchronization?
The board receives bus and generator voltage signals via the JV and JMP connectors. It then performs speed matching and voltage matching using embedded software. If all synchronization conditions are met, it sends a permissive signal for breaker closure. The STCA board performs an additional synchronization check for added safety.
How does the board process flame detection signals?
Flame detection signals from UV flame detectors are received through the PTBA terminal board and transferred via the JVA, JU, and JK connectors to the board. The signals are then scaled, conditioned, and analyzed to determine flame intensity and status, ensuring safe turbine operation.
