The steel industry is one of the pillar industrial industries in the development of China’s national economy. During the “Tenth Five-Year Plan” period, China’s steel industry has entered a period of rapid growth, with an average growth rate of 20% year by year. However, the rapid growth of steel production has brought about high energy consumption of steel companies. The quality of energy supply of steel companies has an important impact on steel production. There is a direct relationship between the quality of products. At the same time, energy consumption directly affects the cost of steel products, which in turn affects the competitiveness of a company. In addition, as steel companies are major polluters, the rational use and balanced deployment of energy play an important role in environmental protection. plays an important role2]. Energy management is an important part of steel enterprise management. It must start from the aspects of energy saving, production technology and equipment.
Various metallurgical furnaces improve thermal efficiency, reduce household waste and raw material consumption, and improve the recovery and utilization rate of waste heat and waste energy.
Strengthen energy management from five aspects including plant-wide energy balance and utilization of various energy sources134. In short, the purpose of energy management is to reduce the energy consumption of the entire steel enterprise and find appropriate ways to save energy.
Because the energy management system involves a wide range, quantity and category, the communication protocols used are inconsistent, the metering equipment used by various departments is also very different, and due to the wide variety of monitoring equipment
There are many protocols, diversified and geographically dispersed, and the enterprise’s production monitoring and interest-based software standards are not unified, resulting in communication problems in system networking.
The problem of protocol conversion is becoming more and more prominent. Since information cannot be shared, it has seriously affected the performance, construction period, cost and system stability of the automation system. Currently, general gateway industriali are used for centralized data collection and are widely used in the industry.
The system network diagram is shown in Figure 1. An industrial gateway can simultaneously collect data from Siemens PLC, Schneider PLC, upper-level industrial computers and other equipment through different collection protocols, and forward the collected data to the main server and backup server through the forwarding port. The PFC6404 gateway has four network ports, and each network port corresponds to a collection device. The collection protocol and communication-related configuration can be set in the gateway configuration software.
The industrial communication gateway adopts a high-performance embedded computing platform. The service core software can run in a desktop operating system or an embedded operating system. It is a communication that is independent of specific hardware device interfaces.
The service platform has a high-performance real-time database system (the prototype is developed in standard C under Unix). It has a variety of communication collection and forwarding protocol libraries. It can collect data from multiple different subsystems, conduct data centralized summary, classification and preprocessing. It can simplify the conversion of heterogeneous protocols in the system and the system networking process. The heterogeneous protocols can be easily accessed and converted into standard protocols (such as OPC). Network with other systems.
2 Force Control Gateway is used in surveillance systems
In the Xingcheng Special Steel energy management and control system, due to the differences in on-site collection sites. The gateway uses OPC Client, OPC Tunnller, Modbus and other communication protocols to collect on-site data. Each site uses Modbus as the forwarding protocol to forward the data to the 1O server of the energy management and control center. To ensure centralized management, dispatch and balance of energy supply and demand.