GE DS200TCEAG1BTF Mark VIe control system component

I. Core Functions

Rotational speed signal acquisition and processing

The rotational speed of the turbine shaft is monitored in real time through dedicated sensors (such as magnetic sensors and proximity switches), and the mechanical speed is converted into an electrical signal.

High-speed processors and precise algorithms are adopted to filter, amplify and digitize the signals, ensuring the accuracy of rotational speed measurement (usually up to ±0.1%).

The overspeed protection logic is executed

It is equipped with a built-in triple Redundancy (TMR) architecture, which performs parallel computing on the same rotational speed signal through three independent processors and adopts a 2/3 voting mechanism to ensure the reliability of decision-making.

When the rotational speed is detected to exceed the preset threshold (such as 110%-112% of the rated rotational speed), an emergency shutdown command is immediately triggered to close the fuel valve or steam control valve to prevent equipment damage due to overspeed.

System monitoring and diagnosis

Continuously monitor the status of its own hardware (such as power supply, communication, and sensor connection), and automatically alarm and record fault codes when abnormalities are detected.

Supports online testing function, which can verify the effectiveness of the protection circuit without affecting the operation of the turbine.

Ii. Working Principle

Signal link diameter

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Sensor (such as DS200SCCCG1A) → DS200TCEAG1BTF (Signal conditioning → analog-to-digital conversion → logic processing) → Output relay → Actuator (such as valve)

Redundancy and safety mechanism

TMR architecture: Three processors operate independently. Consistency is ensured through comparison results, and the failure of any one processor does not affect system security.

Hardwired output: The shutdown circuit is directly controlled by relay contacts to avoid protection failure caused by software faults.

Self-check function: Regularly perform internal tests to verify the integrity of signal paths and logic circuits.

Iii. Application Scenarios

Gas turbine control

During the processes of startup, speed increase, grid connection and load change, the rotational speed is monitored in real time to prevent surge or runaway accidents.

Coordinate with other modules (such as DS200TCMAG1A) to achieve coordinated control of combined cycle power plants.

Steam turbine protection

Monitor the rotational speed of the steam turbine shafting system to respond quickly in case of steam valve failure or load shedding, and prevent rotor overspeed fracture.

Integrated with the Emergency Avoidance System (ETS), it forms a dual protection mechanism.

Industrial drive equipment

It is used for compressors, pumps and other equipment driven by turbines to ensure safe operation under variable working conditions.

Iv. Technical Parameters

Parameter type technical specification

The input channel typically supports three independent tachometer sensor inputs and can be configured as redundant or diversified sensors.

Measurement range: 0-10,000 RPM (adjustable according to application).

The response time is ≤10ms (from detection to overspeed to triggering shutdown), meeting the requirements of high-speed protection.

The safety level complies with the SIL3 safety integrity level, and the failure probability is ≤10^-9/h.

The communication interface supports communication with other modules of the Mark VIe system (such as HMI, PLC) through the IONet network.

Operating temperature: -40°C to + 70°C, suitable for harsh industrial environments.

V. Collaboration with Other Modules

With DS200SCCCG1A (sensor conditioning card) : Receive sensor signals, preprocess them and then transmit them to TCEAG1BTF.

With DS200TCCCG1A (controller) : Upload rotational speed data, receive control instructions, and achieve closed-loop control.

With DS200DOBDG1A (Digital output card) : It outputs a stop signal through a relay to drive the actuator.

Vi. Key Points for Maintenance

Regular verification: Use a high-precision rotational speed simulator every year to verify the measurement accuracy and ensure the accuracy of the protection threshold.

Sensor inspection: Check the probe clearance (usually 0.7-1.0mm) to prevent signal distortion caused by vibration or thermal expansion and contraction.

Redundancy test: Conduct online TMR redundancy tests monthly to confirm that the voting mechanism is normal.

Firmware update: Install the firmware patches released by GE in a timely manner to fix known vulnerabilities.

Summary

The DS200TCEAG1BTF is the "safety guardian" of turbine control systems. Through high-precision speed monitoring, redundant protection logic and rapid response mechanism, it provides reliable emergency shutdown function when the equipment is at risk of overspeed. It is widely used in the protection of key power equipment in industries such as power, petrochemical and metallurgy.