Reliability Analysis of Thermal Power Generation Control System Based on DCS

April 21,2025

As global energy demand rises, thermal power generation remains vital for electricity supply, especially in large plants with complex processes and numerous equipment. The control system must be efficient, stable, and reliable. Distributed Control Systems (DCS) are widely used in thermal power plants, enhancing efficiency and safety. However, DCS also faces reliability challenges. This article explores these issues and proposes solutions to improve DCS reliability in thermal power generation.

1、 Overview of DCS System

The DCS system collects data through control devices and sensors distributed on site, and monitors various parameters of the power production process in real time. It has high flexibility and reliability, and can centrally monitor and automatically control complex production processes.

2、 Application of DCS in Thermal Power Generation

DCS is mainly used for monitoring and controlling equipment such as boilers, steam turbines, generators, and auxiliary machines
Boiler control: Monitor the temperature, pressure, flow rate, etc. of the boiler to ensure its stable operation.
Steam turbine control: Monitor the speed, vibration, pressure, etc. of the steam turbine to ensure safe and efficient operation.
Generator control: Monitor output voltage and power to ensure grid stability.
Auxiliary control: controls cooling water, fuel supply, and exhaust gas treatment to ensure smooth power generation process.

3、 Reliability issues of DCS control system

Although DCS systems have improved automation levels, they still face the following challenges:
Hardware failure: Equipment failure during long-term operation, especially in harsh environments, increases the risk of failure.
Communication failure: Data transmission interruption may jeopardize system control capabilities.
System integration issues: Compatibility issues between devices and software may result in data loss or misoperation.
Human factors: Misoperation or misjudgment by operators may lead to system failures.

4、 Measures to improve the reliability of DCS system

To improve the reliability of the DCS system, the following measures can be taken:
Hardware redundancy design: such as dual controllers, dual power supplies, etc., to ensure that the system automatically switches to backup devices in case of hardware failure.
Software fault tolerance mechanism: Strengthen software design, add functions such as automatic recovery and logging, and enhance self recovery capability.
Regular inspection and maintenance: Regularly inspect and patrol equipment, promptly eliminate potential faults, and ensure the replacement and maintenance of spare parts.

5、 Conclusion

DCS systems have significant advantages in improving automation levels and production efficiency, but their reliability issues cannot be ignored. By implementing measures such as hardware redundancy, software fault tolerance, communication optimization, and personnel training, the reliability of thermal power plants can be effectively improved, ensuring their safe and stable operation. In the future, with the advancement of technology, DCS systems will become more intelligent, providing more solid support for the sustainable development of the thermal power generation industry

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Reliability Analysis of Thermal Power Generation Control System Based on DCS

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