Reliability is a key factor in the operation of DCS control systems. As the national economy grows and people's quality of life improves, the importance of electricity to both economic development and daily living becomes increasingly evident. Power generation must not only meet safety standards but also maintain efficiency. The reliability of power systems has become a major social concern. To achieve this, it is essential to involve all levels of management, leverage technological advancements, and motivate employees to enhance the performance of power generation equipment effectively.
In large power plants, the reliability of the control system directly impacts the safety and stability of the entire facility. In the 1970s, with the advancement of 4C technology and higher single-unit capacities, control systems evolved toward functional decentralization and centralized management, significantly improving their reliability. By the mid to late 1980s, DCS (Distributed Control System) was introduced in many foreign power plants. China followed suit by adopting DCS for imported units. Today, newly built units typically use mature DCS systems, while older units have undergone upgrades to incorporate similar technologies.
The widespread adoption of DCS has greatly contributed to the safe and efficient operation of power plants. However, under the market economy, maintaining and improving DCS reliability has become even more critical. It is no longer just about technical performance—it’s about ensuring operational safety and maximizing profitability.
When selecting a DCS control system, whether for new or upgraded units, cost-effectiveness is important. However, reliability should always be the top priority. Key considerations include choosing systems that have been tested and proven on similar units, ensuring hardware reliability, implementing redundancy in critical components, and selecting software that is easy to maintain and configure.
During installation and commissioning, strict attention must be paid to environmental conditions, cable routing, grounding, and insulation. Proper ventilation, temperature control, and dust prevention are crucial for the long-term stability of electronic equipment. Additionally, program design and testing should involve experienced engineers throughout the process to ensure logic is accurate and reliable.
Training is also essential. Operators and thermal control personnel must be thoroughly trained to understand and operate the DCS system effectively. This includes simulation-based training and hands-on practice during commissioning. A well-trained team ensures smooth operation and quick response to any issues that may arise.
Finally, continuous monitoring and maintenance of the DCS system are necessary. Configurations and parameters should be managed carefully, with proper authorization and documentation. Any changes made online should be done with caution to avoid potential disruptions or failures.
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