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Realization of Localization of DCS System for Ultra Supercritical Units
Guodian Zhishen has implemented a three-step strategy to achieve the localization of the DCS (Distributed Control System) for 1000MW ultra-supercritical units. This approach includes digestion, innovation, and advancement, with key projects such as the Taizhou Beilun service, the foundation-laying at Longshan Zhuanghe, and the realization of localization in the Shubi project.
The first step involved studying and understanding the control characteristics of 1000MW ultra-supercritical units through engineering services at Taizhou and Beilun Power Plants. By using the autonomous DCS system, Guodian Zhishen achieved control over subcritical and supercritical units at Longshan and Zhuanghe, laying a solid foundation for future localization efforts. The final stage saw the successful implementation of the DCS system on the 1000MW ultra-supercritical unit, marking a significant milestone in the localization process.
Currently, Unit 1 of Taizhou Power Plant is operational, while Unit 2 is nearing the end of its 168-hour trial run. The Beilun project has started on-site commissioning, and the Longshan 600MW subcritical unit using Guodian Zhishen’s DCS system has been running since 2007, becoming the first domestic DCS system used on a 600MW unit. Similarly, the Zhuanghe 600MW supercritical unit was successfully launched in 2007, achieving a historic breakthrough in domestic DCS technology. The Shubi project, involving a 1000MW ultra-supercritical unit, has signed a cooperation agreement and is part of the national 863 Project, highlighting its significance in the industry.
The Taizhou 1000MW ultra-supercritical unit DCS system includes 34 controller pairs, covering functions like DAS, FSSS, SCS, MCS, ECS, MEH, METS, and BPS. With 12,452 I/O points and 1,105 control devices, it represents one of the most complex DCS systems ever implemented. The Beilun project, also featuring a 1000MW ultra-supercritical unit, has 28 controller pairs and 12,464 I/O points, showcasing the advanced capabilities of Guodian Zhishen's systems.
Through these projects, Guodian Zhishen has gained deep insights into the process flow, control strategies, and technical requirements of ultra-supercritical units. The company has optimized control strategies, studied the allocation of DCS controller functions, and improved the application software of the DCS system through collaboration with design institutes, equipment manufacturers, and power plants.
The 1000MW ultra-supercritical unit presents unique challenges, including a larger system scale, faster control response, higher reliability demands, and increased intelligence requirements. These factors necessitate advanced DCS solutions that can handle complex thermal systems and ensure safe, efficient operation.
At Longshan and Zhuanghe, Guodian Zhishen laid the groundwork for the localization of DCS systems by implementing domestic solutions on 600MW units. The Longshan project, completed in 2007, featured a DCS system with 9,596 I/O points and 1,097 control devices. The Zhuanghe project, launched in 2006, marked the first use of a domestic DCS system on a 600MW supercritical unit, achieving full integration and high reliability.
Guodian Zhishen’s EDPF-NT system, developed for large-scale generating units, features a graphical project manager, support for multi-domain network communication, efficient controller software, and a robust man-machine interface. It has been continuously improved through research and development, aligning with international standards and supporting the needs of modern power plants.
Looking ahead, Guodian Zhishen continues to focus on improving the control and protection strategies of supercritical units, conducting in-depth research on thermodynamic characteristics, enhancing control performance, and developing standardized designs for future projects. These efforts aim to meet the growing demand for automation and safety in the power generation industry.