The second phase of Shizuishan Power Plant is a pilot power plant of the National Demonstration Power Station in 2000. According to the requirements of the demonstration power plant of Guodian, this project is designed at a higher level of automation. Its purpose is to improve the operation level of the power plant and narrow the gap with the international one. That is to establish a computer network of the whole plant automation system, use the mature and reliable products of the computer to achieve the whole plant data sharing. In the control mode, the control room layout, the configuration and function of the control system, the power plant operation monitoring mode, and the main auxiliary machinery controllability and other aspects have greatly improved. 
I. Project Overview
In this project, four 330MW coal-fired generating units were constructed. The construction plan design was started in October 2000. The #1-3 units were put into commercial operation in November 2002, May 2003 and December 2003 respectively.
1.1 Major Equipment Conditions
1.1.1 Boiler and Main Auxiliary Equipment
(1) boilers
a) Model: WGZ1004/18.44-2
b) Manufacturer: Wuhan Boiler Factory
c) The main steam temperature adopts desuperheating water thermostat mode, and the reheat steam temperature uses desuperheating water and baffle thermostat mode. 
d) The air preheater is a three-zone binocular air preheater.
e) Direct-fired milling system. 
(2) The coal mill is a medium-speed coal mill produced by the Beijing Power Repairing Plant. Each furnace is equipped with 4 mills. 
(3) The coal feeder is equipped with a weighing coal feeder from Shenyang Shi Dao Ke. Each furnace is equipped with 4 coal feeders, 3 of which are operated and 1 is back-up. 
(4) The blower adopts an adjustable axial-flow fan with movable blades manufactured by Shanghai Blower Works Co., Ltd., and each boiler is equipped with two sets. 
(5) The induced draft fan adopts the static blade adjustable axial fan produced by Chengdu Electric Machinery Factory, and each boiler is equipped with 2 sets of machines. 
(6) Centrifugal fans produced by Shanghai Blower Works Co., Ltd. are used for primary fans, and each boiler is equipped with two sets. 
1.2 Turbine and Its Auxiliary Machines
1.2.1 Steam Turbine
a) Model: N330-17.75/540/540
b) Manufacturer: Beijing Heavy Machinery Factory
1.2.2 The electric speed-regulating feed pump adopts Shenyang Pump Factory products, and each machine is equipped with 3 sets of 50% electric power feed pumps. 
1.2.3 The active water supply system is composed of three sets of 50% B-MCR capacity speed-regulated electric feed pumps (two of which are operated, one of which is standby), and two high pressure plus one steam coolers. The condensate system consists of one Deaerator and four low-add components, high pressure heater, steam cooler and four low-pressure heaters are products of Dongfang Boiler Factory. 
1.2.4 Deaerator and water tank are produced by Shanghai Power Station Auxiliary Machinery Factory. 
1.2.5 Condenser is Dongfang Turbine Factory product. 
1.2.6 The high and low pressure bypass and its control system are provided by the Swiss Sulzer Company. The high pressure bypass is 70% capacity and the low pressure bypass is 2×65% capacity.
1.3 Generators
a) Model: TA255-46
b) Manufacturer: Beijing Heavy-Duty Motor Factory
c) Cooling method: Water Hydrogen and Hydrogen
1.4 Control System
1.4.1 The DCS adopts Siemens TELEPERM-XP products, #1 and #2 units are provided by Xinhua Power Plant Control Company; #3 and #4 units are provided by the electric research and wisdom deep sets. 
1.4.2 SIS is provided by Xi'an Thermal Engineering Institute. 
1.4.3 DEH is provided by Xinhua Power Plant Control Company. 
1.4.4 The entire plant auxiliary workshop network control system is provided by Xi'an Aerospace 210. 
1.5 Control Interface and Control Methods
1.5.1 Adopt centralized control method of furnace electromechanical unit. There is no electrical network control room, and the electrical network is controlled in a centralized control room. 
Auxiliary workshop adopts a centralized control method, that is, monitoring of the auxiliary workshops except coal transportation is performed in a centralized control room. The coal handling program was completed in the coal control room. After the operation is stable, when the conditions are ripe, the coal handling program control is moved to the centralized control room for monitoring. 
A single unit sets up two BARCO84′′ large-screen operation displays and four operator stations to realize all the monitoring and control functions of a single unit and the monitoring and control of the common parts of the two units. There are no conventional monitoring instruments and light plates in the control room. Only the hard hand button for safety shutdown is set on the operating console.
1.5.2 unit monitoring mode
a. All unit units realize CRT monitoring. The operating personnel in the centralized control room through the CRT operator station and large-screen display in the presence of local inspection personnel to achieve unit start / stop operation control, normal operation monitoring and abnormal operation of the unit and the handling of accident conditions. 
b. This project is based on the unified operation and management of the furnace and unit centralized control, and centralized control of the indoor operation organization is based on the operator of the unit. 
c. Monitor the auxiliary workshops in the centralized control room through the auxiliary workshop CRT operator station.
The system consists of plant-level monitoring information system (SIS), decentralized control system (DCS), turbine control system (DEH), bypass control system (BPS) and auxiliary workshop centralized monitoring system. 
1.5.3 Control System Configuration
The control system of this project consists of plant-level monitoring information system (SIS), distributed control system (DCS), turbine control system (DEH), bypass control system (BPS) and auxiliary workshop centralized monitoring system. 
1.5.4 Control room and electronic equipment room layout
a, centralized control room layout
A centralized control room is set up for every two machines. Located in the operational floor of the electrical complex, with an elevation of 12.60 meters. 
Set up a closed-circuit television monitoring system for steam drum water level and furnace flame industrial television and important unattended areas. 
b. Arrangement of electronic equipment
The two units set up their own electronic equipment rooms and are arranged behind the centralized control room in the operation layer of the electric complex. 
c. Auxiliary workshop control room and electronic equipment room layout
The whole plant auxiliary workshop control operator station is arranged in the centralized control room. Each auxiliary workshop electronic control device is arranged in each workshop electronic equipment room, in the important auxiliary workshop has the local control CRT, when the unit starts, the debugging, the breakdown may monitor in situ. 
Second, SIS profile
As the core of the whole plant automation system, SIS requires all the real-time information and process parameters obtained from the lower control network through communication. It provides a sufficient number of interfaces to connect with other control systems and networks of the power plant to realize the networking and information sharing of the entire plant production process. 
2.1SIS system function
2.1.1 SIS system according to the contract and technical agreement requirements, with the entire plant production process monitoring; load distribution between units of economic functions; plant-level performance calculation and analysis; real-time analysis of the entire plant economic indicators and optimize the operation of the operating guidance.
(1) Realize the monitoring of the whole plant production process
Plant-level monitoring information system SIS as an information system for the production process. The production process monitoring system of the whole plant includes real-time production data and production processes of the unit DCS, network control system, auxiliary shop control system, power grid dispatch, etc., which are networked with the plant-level monitoring information system to establish a real-time database of the production process. Monitor and query on SIS workstations and terminals. 
(2) Realize the economical distribution of load between units
SIS can determine the economic load distribution of each unit based on the remote dispatching instructions and other production dispatching instructions in combination with the operating conditions of the main and auxiliary systems and equipment of the plant. The SIS system can help value-makers effectively use a large amount of process information, quickly and accurately grasp the operation of the entire plant production process, and correctly issue instructions. At the same time, the SIS system also provides the economic load distribution and scheduling methods for scheduling the end-to-end adjustment of the whole plant load, so as to realize the function of each unit to perform closed-loop load adjustment according to the SIS economic load distribution results. 
(3) Analysis of economic indicators and optimization of operation guidance
Economic evaluation of the operating conditions of the entire plant, analysis of the reasons, and operation guidance, so that the unit is operating under optimal conditions, the highest operating efficiency, the lowest coal consumption. 
(4) Plant level performance calculation
In order to avoid duplication of the functional groups, the plant-level performance calculation function is based on the performance calculation of each unit. The performance calculation function of each unit is used to complete the plant-level performance calculation function, and this calculation result is used for economic index analysis, CRT Screen display, report statistics and print records as needed. 
(5) Communication Management Function
The communication management software has a variety of communication protocol and interface management functions to ensure the interface and data format conversion of the SIS system with other control systems. 
(6) Network Management Function
In order to ensure the security of data transmission in the SIS network, real-time and network security, and fast switching of redundant networks, the SIS has the necessary network management functions and corresponding software. 
(7) SIS system fault self-diagnosis function
SIS has a complete self-diagnosis function, which can monitor the running status information of the entire network and devices on the network in real time. Hardware and network failures can be alarmed on the network management computer. 
2.1.2 Communication Interface
As the foundation and core of the whole plant automation system, SIS sets up interfaces with other control systems and equipment. The control system and equipment for establishing digital communication interface with SIS are: #1 unit DCS, #2 unit DCS, #3 unit DCS, #4 unit DCS, auxiliary workshop automation system, electrical network control system, automatic power generation control system (AGC) MIS such as power plant management information systems. 
The SIS system is networked with the switch, and the SIS is responsible for the rest of the interface except the DCS interface being handled by the DCS vendor. 
The SIS system is responsible for the interface between the SIS system and the power plant MIS system. The data required by the MIS system is provided by the SIS system's process information database. 
2.1.3 System Network Connections
The system backbone network uses 1000MBPS Fast Ethernet as the main medium for information transmission and data transmission. 
The backbone network connection equipment uses two Cisco 4006 network switches with Gigabit fiber modules. The two network switches are mutually standby. 
The data server is connected to two switches through a Gigabit fiber interface network card to form a Gigabit redundant backbone network. 
2.1.4 SIS power system
Two 220VAC power supplies are connected to the SIS power cabinet. The power distribution is performed in the cabinet, which supplies the SIS interface machines, switches, servers, function stations, and printers. 
Third, SIS hardware structure
3.1 General Features
3.3.1 The system hardware uses imported imported equipment. 
3.3.2 Use the process information provided by the real-time information database server to complete the various functions of the SIS. 
3.3.3 SIS network capacity Designed according to the total capacity of the project (4X300MW), the real-time information database is scalable, and its capacity is designed according to the project capacity of the current period and considering proper margin. 
3.3.4 SIS The data passed to MIS conforms to the ORACLE database data format. 
3.2 SIS system hardware
The hardware equipment of the SIS system includes network internal equipment functional station communication transmission media, communication interfaces, and communication optical fibers connected to upper and lower control networks. 
3.2.1 SIS network
The SIS system uses a 1000 Mbps Ethernet network as the medium for information transmission and data transmission. The communication medium of the backbone network and each lower layer control system are connected to the backbone network using optical fibers, and each functional station and the network is connected using twisted pair or coaxial cable. Or optical fiber (determined according to the specific cable transit environment), the network connection device selects the network switch. 
3.2.2 Controlling Network Interface Devices
The SIS provides data interface equipment with the lower control network (DCS, auxiliary shop control network, grid control system NCS, etc.). These interface devices do not affect the control functions of the lower layer control network data. SIS does not modify or configure the underlying control network or directly control the process. Only the load distribution station can manually transfer the load distribution instructions to each unit's DCS system according to the operation needs. 
3.2.3 Process Real-time Information Database Server
The process real-time information database server uses a PI database, which has a large storage capacity and advanced data compression methods for storing real-time data of all production processes and the calculation and analysis results of these data by the SIS system. Not only can real-time data be collected, but also they can be saved in their basic form (time interval, accuracy, etc., acquired by the control system), and satisfy different users and application levels for different purposes. Requirements: 
a. The database supports the standard C/S (client/server) architecture, which has good openness and scalability, and supports multiple server architectures. When expanding the data access of the unit, only the database server can be added. 
b. The system supports a multi-platform structure. 
c. The data collection will include real-time data of all systems connected to the SIS. The accuracy of each point collected can meet the actual requirements. 
d. Adopt an effective compression method to ensure that the online storage time of real-time information and calculation and analysis result data of all power plant production processes is at least 4 years, and has the function of transferring to CD-ROM. The compressed data recovery scan time is no more than 15 milliseconds. Real-time and historical data will not be modified. The security level for each collection point can be defined, and only authorized users at all levels can access this level of data. The database system is equipped with a firewall to prevent computer viruses, operational errors or human damage to the data system. 
e. The real-time database system has a standard interface with its networked data source system and can establish normal data communication. 
f. The database is sufficiently open and easy to maintain and develop. 
g. Provide standard CD recording equipment. 
h. The production process information in the database is continuous and will not be interrupted or lost due to communication failures and other reasons. 
3.2.4 function station
Function stations use safe, reliable and advanced industrial PCs. They can be used as clients of the database server to obtain process information from the database for analysis, calculation and display, and store the calculation and analysis results in the database for other clients or systems. transfer. 
Function stations include the following types:
a. Workstations
2 workstations to complete the SIS function. Display the operating status, parameters, and system diagrams of boilers, turbines, generators and auxiliary engines, and auxiliary systems of the whole plant in the form of screens, curves, and bar graphs, and generate statistical reports on various production and economic indicators as required. 
Workstations set up software protection passwords to prevent unauthorized personnel from changing computing programs. 
b. Long station
The 2-station long station is dedicated to the total plant operating value. It is the link connecting production and management. In the long station, not only the process parameters of the whole plant can be viewed, but also the calculation and analysis results of each functional station can be called. The optimized operation suggestions generated at the functional station can be displayed on the long value station as a reference for the operator to issue instructions to the operator. 
The long station sets the software protection password and the keypad lock to prevent other personnel from changing the instructions without authorization. 
c. Network system management and maintenance station (or engineering station)
A network system management and maintenance station, which is dedicated to network management and development personnel, can manage, maintain, develop, and diagnose SIS system networks and database servers, manage network access user rights, and monitor network security. . 
The network system management and maintenance station sets the software protection password to prevent other personnel from changing the program without authorization. 
d. Load distribution station
A load distribution special station receives the load dispatching instructions transmitted by the RTU device and the real-time economic indicators and real-time cost accounting information transmitted from the SIS server through the communication network. Through the analysis and processing of the above information, the economic load distribution function is completed. The economic load distribution results are displayed on the CRT screen, and can be manually switched to the DCS system of each unit according to the operation requirements, and the load closed-loop scheduling function of each unit is realized.
The load distribution station has data security and network security assurance measures. 
The load distribution station sets a software protection password to prevent other personnel from arbitrarily changing programs and setting values. 
IV. SIS System Software Platform
4.1PI (PlantinformationSystem) is a factory real-time data integration application platform based on the client/server structure developed by OSISOFTWARE. As a bridge connecting the lower control network of the factory and the upper information system network, PI plays a special and important role. 
On the one hand, PI is used for automatic collection, storage, and monitoring of plant data. As a large real-time database and historical database, PI can store years of multi-year data at each process point. It provides a clear and accurate picture of the operating conditions. Users can browse the factory's current production situation, but also review the past production. 
On the other hand, PI provides quick and efficient information for end users and application developers. Since factory data is stored in a unified database, all people, wherever they are, can see and analyze the same information. 
4.2 C/S Structure of PI
The PI is a true C/S computer environment. The smart structure it uses can operate in a variety of system configurations. 
4.3 PI function
4.3.1 Obtain all relevant data for operation or production
4.3.2 Online storage of long-term data
4.3.3 Storage in the form of data, data collection and storage Keep the original time interval and accuracy without considering how to use it in the future. PI's patented "revolving door" compression technology can store thousands of points of data without requiring a large amount of disk space. 
4.3.4 The only data source
V. SIS system hardware structure
5.1 PI database server
It is used to install PI database and store data to provide data source for SIS client. It is the core server of SIS. 
Two Poweredge 4400 servers (DELL USA) and disk arrays are used to form a dual fault-tolerant server cluster. 
5.1.1 The main specifications of the server are as follows:
- INTELXEON 1000MHZ processor/256K cache
- Memory, 1024MB
- HDD, 18GBULTRA160SCSI1′′10000 rpm/minute
- Hard disk backplane with 2x4 1" brackets, hot swappable
- Gigabit Ethernet Cards
-Redundant power supply, hot-swappable
5.1.2 Disk array cabinets are the United States DELL products. The main indicators are as follows:
DellPowervault200/201S (US DELL) 2 sets
- HDD, 18GB SCSI
-redundant power supply
5.2 Function Station (US DELL) 6 sets
-256KADVANCEDTRANSFERL2 cache
-OPTIPLEX,GX110,INTELX(R)PENTIUM(R)IIIPROCESSOR1.0GHz,MINITOWERCHASSIS
- Expansion slot card with 5 PCI slots
- Memory, 256MB 100MHz SDRAM
-3.5′′1.44MB Floppy Drive
-DIAGNOSTICCD,OPTIPLEX
-21" Flat-screen Monitor
-20GB, ULTRAATA66
5.3 Interface Machine (US DELL) 6 sets
OPTIPLEX,GX110,INTEL(R)PENTIUM(R)IIIPROCESSOR866MHz
256KADVANCEDTRANSFERL2 cache
Expansion slot card
Memory, 128MB (1X128) 100MHz SDRAM
3.5′′1.44MB floppy disk drive
DIAGNOSTICCD, OPTIPLEX
15" monitor
HARDDRIVE, 20GB
5.4Catalyst4006 Switch (US CISCO) 2 sets
Catalyst4000
Catalyst4000E/FE/GEModule, 2-GE (GBIC), 32-10/100 (RJ-45)
1000BASE-SX
Sixth, SIS application function
6.1 factory production process monitoring function
All plant production process monitoring systems can be monitored on SIS workstations and terminals. Divided into production process monitoring flow chart and production data query in two parts. 
6.1.1 Use part or all of the production flow chart of the DCS manufacturer. The flow chart includes: boiler steam turbine parts, electrical systems and auxiliary systems. 
6.1.2 Production data query: This function mainly completes the query of production real-time data trend, real-time data and unit performance calculation results. 
(1) The system and device can be queried
(2) Query according to the calculation results of unit performance
6.2 Unit online performance calculation
6.2.1 Unit online performance calculation includes
(1) Performance of turbine generators
(2) Thermal system thermal balance
(3) Calculation of boiler performance
(4) Condenser Performance Calculation
(5) Feedwater heater performance
(6) Boiler feed pump and small machine performance calculation
(7) Calculation of turbine performance
(8) Air Preserver Performance Calculation
(9) Superheater and reheater efficiency
(10) Large pump and large fan efficiency
6.3 Plant Performance Calculation
The plant-level performance calculation is based on the data from each unit's performance calculations and economic analysis and evaluation, and has the function of calculating the economic indicators of the whole plant unit. Reflect the economic performance indicators of the whole plant unit: the entire plant coal-fired costs, the average coal-fired power plant-wide rate, the average coal-fired power plant-wide rate, the entire power supply, plant-wide average plant electricity rate, generator voltage quality, plant-wide generator Hydrogen pressure, power generation of the whole plant, fuel consumption of the whole plant, fuel quantity of the whole plant, replenishment of the whole plant, quality of the whole plant's soft drinks, and steam supply of the whole plant. 
6.4 Analysis of Economic Indicators
The economic indicators of the unit (such as the main steam temperature main steam pressure, reheat temperature, spray water flow, boiler outlet smoke temperature, boiler excess oxygen, heater outlet air temperature, air pre-inlet temperature condenser back pressure, condensation Water cooling degree, final water supply temperature, plant power supply condenser water supply flow, etc.) are analyzed, and the CRT screens of the major consumption of each system affecting the unit economy are listed, and the current value and target of each system parameter can be viewed. Numerical value.
6.5 Unit Load Economic Allocation
6.5.1 Systematic analysis and calculation of the data in the SIS system. Based on the calculation results, the best distribution of load among the units under different total plant load is obtained. At the same time, according to the unit load distribution, each unit is assigned automatically or manually, and the distribution results are transferred to the whole plant production process monitoring module. 
The plant-wide load distribution station receives the load dispatching commands transmitted by the RTU device and the real-time economic indicators calculated by the SIS server and the real-time cost calculation information of the entire plant. Through the analysis and processing of the above information, the economic load distribution function is completed. The economic load distribution results are displayed on the CRT screen, and can be automatically and manually switched to the DCS system of each unit according to the operation requirements, and the load closed-loop scheduling function of each unit is realized.
In the load distribution system, the system is divided into manual mode, load curve mode and automatic power generation control mode (AGC), and the economy of each unit is determined by combining the current availability of the main and auxiliary systems of the plant and the economic characteristics of the main and auxiliary engines. Load distribution. 
In the whole plant load distribution station, according to the far-end instructions combined with the current availability of the main and auxiliary systems of the plant and the economic characteristics of the main and auxiliary engines, the economic load distribution function is determined through the optimization calculation method to determine the economic load distribution of each unit. Provide information processing and operation guidance, and automatically display the economic load distribution mode of the whole plant, so that the long-term value can understand the situation and give correct instructions. 
The status display of the real-time operation status of the whole plant received from the SIS server:
â— The current status of the four main units in the whole plant is up or down.
â— The status of each unit's blower, induced draft fan and primary fan currently running or out of service
â— The number of mills currently running or out of service for each unit
â— Each factory feed pump, steam pump and condensate pump
â— The whole factory circulating water pumps are currently operating or out of service
â— The number of air preheaters in the entire plant currently running or outage
6.5.2 Operation Guidance Function
When the total load of the whole plant is lower than a certain load, the load distribution of a certain unit may be less than the minimum stable combustion load of the boiler or zero. At this time, the aircraft will be in the state of oil injection or outage. The following three conditions are mainly considered: Comparison result, recommended operation method:
â—Low load operation
◠Rotate hot standby (at low speed) 
â— completely out of service
CRT shows the number of deactivated units, reasons for deactivation, minimum economic decommissioning time, and deactivation of economic benefits
Seven issues that need to be explained
7.1 As SIS is a new topic that has only been proposed in recent years, there are no mature lessons to be learned. In the initial stage of the project, the owners attached great importance to the system. For instance, DCS manufacturers, commissioning institutes, design institutes, and other relevant personnel had invited domestic parties to discuss in detail what functions the SIS was set up for this project, and decided to set the following basic functions:
7.1.1 Real-time data monitoring of the whole plant production process
7.1.2 Analysis of Economic Production Indexes
7.1.3 Economic Evaluation and Optimization of Operation Guidance (Divided into Unit Level and Plant Level)
7.1.4 Plant Level Performance Calculation
7.1.5 Unit Load Distribution
As of December 2003, the information structure of #1-3 unit and SIS has been completed according to the project plan, and #4 unit is being installed and commissioned. The above-mentioned required functions have been put into operation, but due to certain target values ​​that need to be tested, optimization operation instructions are being further debugged. 
7.2 In the installation process, considering the requirement of the power plant to perform unit performance test periodically on the equipment, the unit performance test function was added. At present, only the designed functions have not yet been put into use. The effect cannot be seen yet. 
7.2.1 When designing the performance test function of the unit equipment, the performance test of the conventional equipment of the power plant is considered. The boiler performance test, the turbine performance test, the condenser performance test, the air preheater air leakage rate test, and the vacuum tightness test are designed. At the beginning of each test, conditional requirements are set. Once the conditions are met, the test is started and the test can be completed at the prescribed time. When designing the equipment performance test function, an interface for the corresponding test item is also provided, and the main performance results of the equipment are listed on the interface. The system can automatically generate a performance test report. Operations and management personnel can view the test report at any time. 
7.2.2 CRT display design
7.2.3 In the performance test, firstly, the test and operation personnel shall check the operating conditions of the system and equipment, and isolate the system according to the requirements of the performance test regulations. After confirming the test conditions, performance tests may be performed. 
7.2.4 The test time can be set by the tester
7.2.5 automatically generate performance test report after the end of the test
7.3 The original design was based on the C/S method. However, this method has its limitations. The limited number of terminals can only be viewed by some people. Later, it decided to increase the browser expansion method so that more people can see SIS information. Of course, the contents to be read need to be agreed in advance. In this way, there are the following advantages:
7.3.1 It is completely based on the browser interface and is easy to install. The client only needs to install the popular IE browser, and the operation is simple and convenient. The software can be used with ease and no additional training is required. 
7.3.2 flexible settings, good system openness and scalability. 
7.3.3 has a good adaptability, zero-maintenance client, to avoid the C/S mode of troublesome system maintenance process, the system administrator no longer need to run around.
7.4 As the DCS report and the auxiliary shop system report are provided by different suppliers and have their own data source limitations, the production report will be completed by the SIS during the construction commissioning process, in which the production data must be comprehensively processed to form the whole plant production report. , good use. 
7.5 Because of the current local system network tuning or direct tune-up unit, the function of economic allocation of relevant unit load has been put in but has not been used yet. This function is only used for load optimization guidance. 
VIII. Concluding remarks
With the continuous increase of the capacity of China's thermal power unit and the increasingly fierce competition in the power market, how to maximize the performance of the unit and improve the level of production management and market competitiveness has gradually become an important issue related to the survival and development of power companies. The role of the control system is no longer limited to ensuring the safety and normal operation of the process system, as it was in the past. Instead, it is necessary to optimize the control and make full use of the potential of the main auxiliary equipment of the power plant on the basis of ensuring safe and normal production. 
The main purpose of using SIS is to improve the management level of the power plant so that the operation of the entire process system can be maintained in the best, most stable, and most economical state, and the production process data can be stored and analyzed for the crew operation personnel and production management. Providers provide guidance and guidance for control and decision-making, and provide their required process data and analysis results to the plant-level management information system, laying the foundation for improving the operation and management level of the entire power plant.
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