Summary:The application of energy management system in the steel industry is an important manifestation of the informatization, data and intelligent development of the steel industry, and it is also an important measure for the steel industry to achieve intelligent manufacturing and refined management. In view of this, starting from the application significance of energy management system in the iron and steel industry, the application status of energy management system is briefly analyzed, and an energy management system is designed based on the characteristics of the steel industry and the goal of intelligent creation. Through the analysis of system architecture and function, it is determined that the system can be interconnected with intelligent power distribution system, automatic management system, resource planning system, etc., so as to realize comprehensive, refined and intelligent control of the energy operation status of iron and steel companies, which is conducive to the high-quality and sustainable development of enterprises.
Keywords:: Intelligent power distribution system; Energy management; Steel; Intelligent; Informatization.
0. Introduction. The iron and steel industry is an important part of China's industrial system and plays a vital role in promoting social progress, economic development and technological prosperity. Based on the rapid development of the iron and steel industry in recent years, the level of automation, digitalization and informatization of steel production and manufacturing has been continuously improved, which has led to great changes in the matching of steel energy supply and demand, the use of steel manufacturing process methods, the connection of steel production processes, and the scheduling and circulation of various flows of steel, and the intelligent allocation and control of energy resources has become the objective demand and inevitable trend of the construction and development of the steel industry in the new era. The intelligent power distribution system and intelligent energy management system can carry out fine control of a variety of energy media, realize the scientific scheduling of various flows in the whole process of the steel industry, effectively improve the management level of the enterprise, and promote the efficient, safe, environmentally friendly, stable and long-term development of the enterprise.
1. Analysis of the application significance of energy management in the iron and steel industry.
1) The application significance of intelligent power distribution system.
Based on the rapid development of the iron and steel industry in recent years, the production scale of iron and steel enterprises has been expanding, resulting in an increase in the production equipment of iron and steel enterprises. In addition, under the continuous advancement of the intelligent manufacturing process, the automation and informatization level of the power supply and distribution network of iron and steel enterprises has been continuously improved, which has put forward higher requirements for power supply and distribution management. The effective design and scientific application of the intelligent power distribution system can meet the management needs of the power supply and distribution system of iron and steel enterprises. Iron and steel enterprises can comprehensively monitor power parameters, environmental parameters, operating parameters, etc. by using the intelligent power distribution system (Figure 1), and guide enterprises to save energy and reduce emissions according to the monitoring results. Early warning of electrical equipment or system overload, overvoltage, overtemperature and other dangerous conditions, reduce the occurrence and development of these dangerous behaviors on the adverse impact of enterprise safety production; Monitor equipment operation failures and power quality problems, so that operation and maintenance personnel can find and deal with faults in a timely manner, prevent the spread of accidents, and reduce the impact of accidents to the lowest level. Iron and steel enterprises can realize the integrated and refined control of asset management (such as asset archiving quick check, evaluation, etc.), operation and maintenance management (such as process specification, operation and maintenance tracking, case storage, etc.), and energy management (such as energy use monitoring, energy consumption statistics, energy consumption assessment, etc.) through the use of intelligent power distribution systems.
2) The application significance of energy management system.
Energy shortage and environmental pollution are the key issues in the construction and development of various fields in China. The steel industry is not only a major energy consumer, but also a major pollutant emitter. From the perspective of production technology, most iron and steel enterprises adopt the process of "sintering-iron-making-steelmaking-rolling" for production, involving raw material plants, sintering plants, coking plants, ironmaking plants, steelmaking plants, rolling plants and many other production facilities. According to statistics, the energy consumption of the sintering process can reach about 48kgce t, the energy consumption of the coking process can reach about 103kgce t, the energy consumption of the ironmaking process can reach about 386kgce t, the energy consumption of the steelmaking process can reach about 54kgce t, the power consumption per ton of steel can reach 456 462kwh t, and the consumption of new water per ton of steel can reach 245~2.56m3 t, etc., the comprehensive energy consumption is about 545 552kgce t. From the perspective of production emissions, the carbon emissions of the steel industry are second only to the power industry, accounting for 13% and 15% of the country's total carbon emissions, in addition to sulfur dioxide, nitrogen oxides, smoke and dust, waste water and other emissions also rank among the forefront of the industrial industry. Therefore, in the development of the new era, how to ensure the quality of production, improve production efficiency, reduce resource and energy consumption, reduce environmental and ecological load, and realize fine energy management have become the key issues that enterprises and relevant personnel pay attention to and think about. As an important part of the information system of iron and steel enterprises, the advantages of energy management system in resource and energy data collection, analysis, sorting, storage and utilization provide support for the intelligent and refined development of energy management of iron and steel enterprises. At present, the energy management system applied by iron and steel enterprises can monitor and control a variety of energy media (various gases, various waters, heating networks, electricity, etc.) information, such as pressure, temperature, concentration, flow, operating status, opening and closing signals, etc., and can also monitor and control pollutant information, such as concentration, flow, total emissions, pollution index, etc., so as to provide guidance for energy distribution and utilization, equipment maintenance, pollution prevention and control, etc. At the same time, the energy management system can be interconnected with other information management systems to further improve the management level of enterprises. Promote the development of iron and steel enterprises with high efficiency, environmental protection, energy saving, specialization, science and technology, and innovation.
2. Analysis of the application status and existing problems of energy management system in the iron and steel industry.
Iron and steel enterprise energy management system is a set of manufacturing process monitoring, energy asset management, energy asset scheduling and other functions as one of the management system, its effective application of the enterprise energy utilization rate to improve, enterprise energy management quality improvement has a positive impact, is the new era of enterprises to achieve green, information, innovative development of an important means. Looking at the application status of energy management system in iron and steel enterprises, it is found that there are still many problems in the application of energy management and control system, which need to be improved, perfected and optimized in the follow-up research and development. For example, energy data collection lacks accuracy and comprehensiveness; The integration between the energy management system and other systems is limited, which is prone to the problem of information islands. The integration of on-site equipment is not high enough, and the discreteness of equipment supervision is high. There is a certain lag in system communication, and post-event management is not uncommon.
3. Optimization design and analysis of energy management system of iron and steel enterprises.
With the concept of "Internet +" and the task of "accelerating the construction of a manufacturing power and a network power", iron and steel enterprises should promote the deep integration of steel manufacturing management and information technology, actively optimize the energy management system, and realize the integration of material flow, information flow and energy flow intelligent scheduling and control, so as to effectively solve the application problems of traditional energy management system, promote the application of energy management system to maximize the role, realize the fine management of energy in iron and steel enterprises, and promote the green, automated and innovative iron and steel enterprises. Intelligent development.
1) The main architecture of the intelligent energy management system.
According to the characteristics of iron and steel enterprises combined with the requirements of "intelligent manufacturing" for the construction and management of iron and steel enterprises, iron and steel enterprises should aim at the safe operation of the system, manufacturing energy conservation and emission reduction, and the collaborative optimization and control of the whole process of energy.
With the support of information and communication technology, an intelligent energy management system is built. According to the function of the intelligent energy management system, its architecture can be divided into the data center layer, which focuses on the scheduling and control of various flows of iron and steel enterprises, including the scheduling and control of material flows such as production raw materials, fuels, and materials; Electrical, hydrological, gas, thermal, mechanical and other energy flow scheduling and control; Information flow scheduling and control that generates various information in the process of manufacturing, operation management and other processes. The collaborative management and control layer is to carry out efficient and high-quality matching of energy assets according to various information, effectively improve the quality and efficiency of enterprise production and management, and greatly improve the utilization rate of various energy and assets. The intelligent management and control layer further improves the intelligent level of the energy management system and realizes the intelligent monitoring, scheduling, and control of the whole process of the enterprise.
2) Key points of intelligent energy management system design.
1) Clarify the relationship between systems and improve system interactivity.
Improving the interaction ability of the intelligent energy management system with other information management systems has an important impact on the full play of the role of the intelligent energy management system. Therefore, in the process of system design and construction, it is necessary to comprehensively consider the relationship between the energy management system and other information management systems of iron and steel enterprises, such as basic automation systems, process control systems, production execution systems, enterprise resource planning systems, etc., so as to accurately determine the position of the energy management system in the architecture of the enterprise information management system. In general, the energy management system is mainly for enterprises and business management personnel, and has high requirements for the controllability and relevance of data information. The energy management system needs to provide accurate and comprehensive information for the operation of the enterprise to meet the needs of the enterprise's production plan, procurement plan, capital plan, energy plan, etc., so the energy management system should have strong coordination and control capabilities such as material flow (Figure 2), information flow, energy flow, and capital flow. The basic automation system and process control management system focus on the basic data control such as the operation status of the equipment, and have high requirements for the accuracy and timeliness of data information. The production execution system focuses on the production management of iron and steel enterprises, including production plan execution control, production energy consumption control, etc., which can effectively connect the process control management system and the energy management system, further improve the production and operation control level of iron and steel enterprises, and eliminate various uncertainties in the production process of iron and steel enterprises. Therefore, in the information management system of iron and steel enterprises, the basic automation system and process control management system are located at the bottom of the architecture, the production execution system is located at the bottom of the information management system architecture, and the energy management system is located at the top level of the architecture.
2) According to the characteristics of iron and steel enterprises, give comprehensive consideration to system design.
How to improve the continuity, durability, safety, rapidity and economy of energy medium transportation has become one of the key issues in energy management thinking of iron and steel enterprises. In this regard, the application of intelligent energy management system in iron and steel enterprises requires strong energy dynamic regulation and balance capabilities. This requires comprehensive consideration of the design of the intelligent energy management system from the aspects of energy medium transmission monitoring ability, energy dynamic regulation ability, energy medium confidence collection and processing ability, energy medium transportation fault analysis and processing ability, energy plan adjustment ability, energy balance ability, etc., so as to ensure that enterprises make scientific decisions on energy medium transportation management with system support.
3) According to the requirements of enterprise energy management, scientifically plan the function of the system.
The main purpose of the application of energy management system in iron and steel enterprises is to improve energy utilization, ensure the balance of energy production, conversion and consumption, and promote the healthy, stable and long-term development of enterprise production. Therefore, the intelligent energy management system of iron and steel enterprises needs to manage energy use on the one hand, and energy costs on the other hand. Among them, energy use management focuses on material flow control, and energy cost management focuses on capital flow control. To meet the energy management needs of enterprises, the intelligent energy management system needs to have functions such as energy equipment supervision, energy plan supervision, energy balance supervision, energy consumption performance supervision, and energy supervision. As far as the actual management of energy consumption is concerned, iron and steel enterprises can establish an energy consumption model according to the actual situation of the enterprise through the intelligent energy management system, and complete the energy consumption with the support of energy consumption history information, production plan information, energy supply and demand plan information, etc., so as to provide a basis for the formulation of enterprise energy management plans and improve energy utilization. As far as energy balance supervision is concerned, iron and steel enterprises can systematically, accurately, comprehensively and dynamically grasp the purchase, storage, utilization, transmission and distribution of electric energy, water energy, gas energy, etc., through the intelligent energy management system, and monitor, dispatch and control them to ensure the safety and availability of energy medium in all links. At the same time, with the help of the system, the enterprise can convert energy data into carbon emission data, realize the intelligent analysis of pollution emissions of each branch or business, so that enterprise managers can more intuitively understand the pollution status of each branch or business, and facilitate the development of pollution emission management issues by enterprise managers, so as to formulate scientific, reasonable and effective emission reduction and pollution reduction plans.
4) Reasonable selection of system implementation technology to ensure the effective play of system functions.
The implementation of the system is inseparable from all kinds of technical support. In this regard, in the process of system design and development, great attention should be paid to the system implementation technology. Since the scope of energy management of iron and steel enterprises is the whole iron and steel plant, the system is designed as a multi-layer distributed structure to ensure the safe and reliable operation of the system and improve the simplicity of system maintenance. Select the customer-server network communication mode, and introduce Ethernet communication technology, fieldbus communication technology, wireless sensing technology and a variety of communication protocols such as Modbus-RTU, IEC61850, ModbusTCP IP, etc., to meet the communication requirements within the system and between systems. The modular design method is adopted, and the system is divided into multiple subsystems according to its main functions to meet the management needs of different users. At the same time, in the design of the subsystem, the energy medium is classified by type, and the staff can consult the historical information for a certain medium. In order to improve the efficiency of information utilization, the system relies on data mining technology, database technology, expert knowledge system technology, etc., which can automatically produce various reports and display them visually in various forms, and the system has information tracking capabilities to facilitate traceability management. Relying on cloud technology, the system can not only log in through the Internet, but also log in through mobile terminals to realize remote control of energy.
4. ACREL-EIOT energy IoT cloud platform.
1) Overview. ACREL-EIOT Energy IoT Open Platform is a set of platforms based on the IoT data platform, establishing a unified uplink and downlink data standard, and providing Internet users with energy IoT data services. Users only need to purchase Accuray IoT sensors, select gateways, and scan the code to get the required industry data services using mobile phones and computers after self-installation.
The platform provides functions such as data cockpit, electrical safety monitoring, power quality analysis, power consumption management, prepaid management, charging pile management, intelligent lighting management, abnormal event alarm and recording, operation and maintenance management, and supports multi-platform, multi-language, and multi-terminal data access.
2) Place of application.
This platform is suitable for apartment tenants, chain small supermarkets, small factories, building management system integrators, small properties, smart cities, substations, buildings, communication base stations, industrial energy consumption, smart light towers, power operation and maintenance and other fields.
3) Platform structure.
4) Platform features.
Electricity collection. The power centralized reading module can realize the query, analysis, early warning and comprehensive display of various monitoring data to ensure the environmental friendliness of the distribution room. In terms of intelligence, the telemetry of the power supply and distribution monitoring system is realized', remote signaling, remote control, comprehensive detection and unified management of the system; In terms of data resource management, it can display or query the operation of each equipment in the power supply and distribution room (including historical and real-time parameters, and according to the actual situation, monthly and annual reports can be queried or printed, so as to improve work efficiency and save human resources.
Transformer monitoring.
Power distribution diagram. Energy consumption analysis.
The energy consumption analysis module adopts automation and information technology to realize the automation and scientific management of the whole process from energy data collection, process monitoring, energy medium consumption analysis, energy consumption management, etc., so that the whole process of energy management, energy production and use is organically combined, and advanced data processing and analysis technology is used to carry out offline production analysis and management, so as to realize the unified scheduling of the energy system of the whole plant, optimize the balance of energy medium, effectively use energy, improve energy quality and reduce energy consumption. Achieve the purpose of saving energy and reducing consumption and improving the overall energy management level.
Overview of energy consumption. Prepaid management.
1) Login management: manage operator accounts and authority allocation, view system logs and other functions;
2) System configuration: configure the building, communication management machine, instrument and default parameters;
3) User management: perform operations such as account opening, account cancellation, remote opening and closing, batch operation and record query for shop users;
4) Electricity sales management: remote electricity sales, power withdrawal, correction and record query for the tables that have been opened;
5) Water sales management: remote water sales, water withdrawal, record query and other operations for the tables that have been opened;
6) Report center: provide electricity sales, water sales financial statements, energy consumption reports, alarm reports and other queries, all reports and records of the system can be exported in excel format.
Prepaid Kanban boards.
Charging pile management.
Through the Internet of Things technology, the charging pile site and each charging pile connected to the system are continuously collected and monitored, and at the same time, a series of faults such as over-temperature protection of the charger, over-voltage of the input and output of the charger, under-voltage, and insulation detection faults are warned. The cloud platform includes all the functions of charging charging and charging pile operation, including city-level large screen, transaction management, financial management, transformer monitoring, operation analysis, basic data management and other functions.
Charging pile kanban.
Smart lighting. Through the Internet of Things technology, intelligent lighting conducts uninterrupted data monitoring of the power consumption status of indoor lighting, urban street lights and other lighting circuits installed in various areas of the city, and can also realize timing switch strategy configuration and background remote management and mobile management, etc., reducing the maintenance difficulty and cost of street lighting facilities, improving the management level, and achieving a certain effect of energy saving and hanging.
Monitor the page. Safe use of electricity.
Safe electricity use adopts the first time of investigation and treatment to eliminate potential electrical fire safety hazards and achieve the purpose of "prevention before it happens".
Smart fire protection. Through the cloud platform, data analysis, mining and trend analysis are carried out to help achieve the goals of scientific fire early warning, grid management, and the implementation of multi-responsibility supervision. It fills the gap that can not be effectively monitored for "nine small places" and hazardous chemical production enterprises, adapts to all public and civil construction, realizes unmanned on-duty smart fire protection, and realizes the actual needs of "automation", "intelligence", "systematization" and "refinement" of power management of smart fire protection.
5) System hardware configuration.
5. Conclusion.
The intelligent power distribution system and intelligent energy management system are management systems formed based on the promotion and application of cloud technology, big data technology, Internet of Things technology, artificial intelligence technology, and mobile communication technology. In iron and steel manufacturing, the key to the application of intelligent power distribution system is to automate and intelligently manage the power equipment of iron and steel enterprises, so as to ensure the safe and stable operation of power equipment to a large extent; The key to the application of intelligent energy management system is to integrate various energy media in the whole process of steel manufacturing, realize overall energy management and dynamic scheduling, and improve the utilization rate of energy resources of enterprises. Based on the effective application of intelligent power distribution system and energy management system, it can promote the green, informational, intelligent and innovative development of iron and steel enterprises, and ensure the long-term safe, stable and healthy operation of iron and steel enterprises.