The PC and fieldbus will be the core of the future, automatic monitoring system, and has occupied mainstream. The PC shows open, while the fieldbus has a distributed architecture. Automation software is an important support for PC and fieldbus occupying the core of automatic monitoring system, which is also increasingly received by people. Power control is one of the automation software with this advanced distributed architecture, and is also one of the few software that is widely praised by the reliability. The technical characteristics of this distributed SCADA system are introduced in terms of force 2.6.
A distributed architecture
As early as the mid-1970s network technology is still not developed, DCS is already a distributed architecture. The system structure of power control is using DCS design idea, which has a free telescopic architecture. In distributed network applications, it is always possible to find a stage for power control. The main reason is that the initial design structure is distributed, and today, this structure shows great advantages in today's highly developed network technology.
The distributed architecture of power control also manifests the relationship between the various component procedures for power control. Powerful control makes full use of the CPU's computing capacity and system resources, using multi-threaded technology, and establish an internal distributed system between all components of power control. For example, the graphical interface system View and real-time database DB are actually distributed, and a graphical interface can connect multiple different remote real-time databases and data sources simultaneously. The various distributed databases interact with the local I / O Server, data acquisition and arithmetic processing, such as the measurement of the input data, flow accumulation, alarm check, and PID operations. The superiority of this architecture is that each component task is more reasonable, so that the system has a better real-time, higher stability.
The force control system structure is shown.
Two comprehensive open systems
In the entire architecture of power, open interfaces are provided everywhere, and open is a major feature.
Power Control I / O SDK Development Tools can be used to quickly develop drivers for generating I / O devices, supported communication types (RS-485 / RS-422 / RS-232), NIC (TCP / IP), PC Bus I / O board, hardware vendor, provided by the DLL, etc.
Powerful supports various open protocols or standards to maximize the interconnection with other systems or sharing of resource data, such as DDE, OPC, ActiveX, etc. have been well supported in power control. In these three standards, it is necessary to act as a serving party or act as a client. The power control is a standard DDE Server, OPC Server, and some ActiveX controls are available for third-party calls, while power control can be from any DDE Server, OPC Server reads data, or calls third-party ActiveX controls.
Powerful control provides standard browser interface web server, and provides a good real-time performance, just specify an IP address, you can browse the power control screen on the network from the web, and the access terminal does not need to be installed Any power control assembly.
Three real-time database DB
Today, the network technology is highly developed, distributed applications are increasingly popular, all kinds of enterprises users have adopted advanced technical means to manage cross-regional, sprocket-free real-time monitoring systems, using distributed real-time databases to implement such applications. Effective means .
1. Features of the real-time database
On the computer running power control software, you can access the powerful real-time database of this unit, or you can access the powerful real-time database on other nodes, and the access method is exactly the same. The database structure of the DB is a configurable "living structure", and the user can customize its own database structure according to actual needs, and easily manage and find data. In addition, DB also divides the regions and units, and retrieves and finds when managing tens of thousands of real-time data.
2. Powerfully control the performance indicators of real-time databases
With compression storage, data can be processed by 100,000 points, historical data can be saved for more than 5 years, and ensure accuracy and speed of data processing.
Four conformity of engineering specifications
All functions of power control are designed to meet the needs of engineers and technicians, sufficient flexibility ensures that it has a wide range of adaptability, and fast customization and automatic generation functions saves users' valuable time. If the redundant hot spare, data password protection, operator rights management, record operation process, real-time print alarm, production running installation package, graphics template and other functions have a distinction and power control feature. Five Assistance Management Department for statistical analysis
The powerful real-time database has a rich statistical function, automatically completing the statistics of the maximum / minimum value / mean and automatically generates the report, and automatically performs the accumulation, day accumulation, monthly accumulation and annual accumulation, users can view at any time Specifies the cumulative data of the time period, for other types of data, the power control also provides a data sheet tool, which can be arbitrarily inquiry, so that any of the retrieval and report output of the data can be implemented without using other commercial databases.
In a similar electronic heavy ingredient control management system and oil metering, this data table is particularly effective, and it is not necessary to install the commercial database management system to meet all the needs.
In addition, power control also provides an independently run tool software odbcgate to store historical data or real-time data into the relational database in an ODBC manner.
Powerful control provides SQL functions, used by the ODBC manner to write real-time and historical data in the relational database.
Six control strategy generator
The control policy generator is a powerful tool, PC, DCS, smart instrument and other traditional control functions of PC, DCS, intelligent instrumentation have a lot of deficiencies, performance in capacity, limited load, algorithm variety, inconvenient online modification control scheme, There are several aspects of sharing data between heterogeneous equipment; on the other hand, the PC Based device is low, but the system integration costs made by PC Based devices are not low, and the maintenance cost is high. The control policy generator generator generator based on PC is used to edit and perform control policies on the upper computer, which can effectively solve the above problems.
The control strategy generator adopts process scheduled programming tools, providing nearly 100 special algorithms, which can effectively make up for the shortcomings of traditional control equipment control, reduce system cost, and improve maintenance efficiency.
Control Policy Builders deal with I / O data through real-time databases, the scan cycle executed by the algorithm is 1 ms.
The control policy generator embedded Linux version can also be cured in the electronic disk, which is suitable for PC Based devices such as PC / 104 modules.
Chongqing a control equipment production plant successfully used the control strategy generator to support their production equipment, and achieved excellent use effects.
Seven application
Powerful control has been used in hundreds of demonstration projects, and there has never happened any problems after eight years of application assessment.
Among all oil and gas treatment devices of Daqing Oilfield Natural Gas Company, 90% adopted control software for the local central control room, based on these local control stations, natural gas companies have implemented the real-time production and monitoring management system of all-natural gas companies, the system The company's Web server installed power control software and established a connection with all field control rooms. On the web server, you can generate the company's production real-time database and generate data all day production, energy consumption, pipe network balance, and use the power control screen installed on the server, and every function department in the company. According to the unit name and date query. The entire amount of data of this system exceeds 20,000, which is one of the largest SCADA systems in China.
American Controlled Software uses force control and their company's Mantra system to achieve the circuit's circuit setting and advanced control, and has achieved success, and is now being promoted.
The China People's Liberation Army has used the monitoring of oil tank zone by power control and radar level gauges to realize the liquid level measurement, tank capacity meter management, volume / quality conversion, and report printing, meeting the requirements of military metrics and accounting. .
The Electric Power North Electric Academy is in the Synchronous Phase Monitoring System (SPMS), using powerful control real-time computing, monitor the phase angle, frequency, voltage, power, power, PMU device statistics, and calculate power factor, actual power And reactive power, when the site is faulty or alarm, the system is timelyly calls the event sequence record (SOE) table from the device and inserts a historical trend for display and analysis. Shenzhen Kangso Technology Co., Ltd. (formerly Kangchuang) uses force control software as its agent's last monitoring software, and is widely used in the field of building control.
The K950 / A / B air compressor of the Nanjing South China Group Oriental Chemical Plant, originally used the imported circular control system, started to renovate in 1998, the factory selection of power control software and Omron's PLC constituent double machine redundant hot spare The system, the two compressors are controlled by a set of PLC, and the two compressors are used. They can automatically switch when interlocking and encounter emergencies, and the system has been stable.
Eight development and prospects
The 3D company has earned the fruitful research results in the "Ninth Five-Year" research project. During the "10th Five-Year" period, the three-five-five "project will also assume the national" 863 real-time database and monitoring system "research during the" 10th Five-Year Plan "software. The research task will invest more forces in technology development, improve technical content, and provide better development tools for the majority of users.
