Questions regarding DCS control

Functions of the DCS system (Distributed Control System) and SIS system: The main functions include real-time collection, processing, and monitoring of information related to the production process; calculation and analysis of operational economic efficiency as well as provision of operational guidance; real-time scheduling; optimization of operations and provision of guidance for such optimization; monitoring of equipment status and fault diagnosis; conducting various tests on units, performing performance calculations, and analyzing economic indicators related to units; simulation and condition prediction; as well as remote functions and other management-supporting functions.

1 Regarding SI and DCS, what is primarily involved is the communication method for smaller-scale applications: the SI (Serial Interface), which is a serial communication approach. SI plays a very important role in the communication between DCS and PLC. SI is a card that can be configured within the APM (Application Process Module) of the TDC3000 system; it occupies the same space as cards such as DI, DO, and HLAI, except that it does not have an actual slot. For more details, please visit http://www.gongkong.com/Common/Details.aspx?c=&m=&Type=paper&CompanyID=&Id=D-8650-CCAA0A397E1E. 2. Regarding SIS and DCS: System in Plant Level – Real-time monitoring information systems. The basic functions of a SIS system can be divided into several key aspects from a software perspective. 1. Monitoring of the entire plant’s production process: Real-time production data and production processes from all the monitoring systems in the plant (including the DCS for machinery, boilers, and electrical systems, the network control system, the control systems for auxiliary workshops, and power grid dispatching) can be monitored and queried on the terminals of the SIS workstations. This functionality includes the creation of a large-capacity real-time/historical database, where production data is processed to generate plant-wide production reports and cost estimates. Data compression techniques are used to store online data for four to ten years (longer than the duration of a major maintenance cycle for the equipment), and a complete set of application user interfaces is provided, including those for displaying production processes, production data, and related reports. 2. Economic load distribution and scheduling among all units in the plant: The SIS system can determine the optimal load allocation for each unit at the plant’s load distribution stations, by taking into account remote AGC (Automatic Generation Control) commands and other production scheduling instructions, as well as the operating conditions of the plant’s main and auxiliary systems and equipment. The SIS system provides excellent information processing software and operation guidance software, helping shift supervisors to make effective use of the large amount of process information, quickly and accurately understand the operational status of the entire plant’s production processes, and issue correct instructions. At the same time, the SIS system should also provide the capability for economic load distribution among units and for closed-loop load regulation. The economic load distribution and scheduling functions should be based on the real-time processing of overall plant economic information and cost accounting, in order to ensure the safe and economical operation of the power plant. 3. Analysis of plant-level economic indicators and guidance for optimized operation: Conduct economic evaluations and diagnostics of the plant’s operating conditions, analyze the underlying reasons, and provide guidance for optimized operations so that the units can operate under the most favorable conditions, achieving the highest efficiency and the lowest coal consumption. It mainly includes functions such as unit performance testing, diagnosis and analysis of unit economicity indicators, optimization of unit operating parameters and guidance for adjustment operations, as well as lists of optimized parameters and guidance for optimization operations. 4. Plant-level and unit-level performance calculations: The plant-level performance calculation function provided is based on the performance calculations of individual units; it utilizes the results of these unit-level calculations to carry out plant-level performance analyses. These calculated results are then used for economic indicator analysis, economic evaluation, display on CRT screens, report generation, and printing records as needed. 5. Process information statistics and analysis: Real-time process information is collected, along with extensive storage of historical data and statistical calculations, thereby providing managers and technical personnel in power plants with a rich source of data. It offers flexible methods and tools for observing and analyzing system performance from various perspectives, generating statistical materials such as trends, grouped data, and reports. It also supports the dynamic evaluation of complex systems, while providing good interfaces with databases from other types of non-production management systems. 3. OI and DCS: OI likely simply refers to the output interface, which is an interface for output

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