Through real-time monitoring of the internal energy consumption of the plant, the safety, reliability, and maintenance efficiency of the energy consumption can be improved, and the labor cost of maintenance can be reduced, and the unattended part of the power supply of the substation can be realized.
Yang Junjun
Ankerui Electric Co., Ltd., Shanghai Jiading
0 Preface
Industrial energy intelligent monitoring is an important part of industrial energy intelligent and scientific management. Through the intelligent equipment to monitor the energy consumption of the entire plant in real time, through the accumulation of energy data, analysis, take reasonable energy use measures and energy-saving transformation programs. Therefore, the intelligent management of the user terminal is of great significance to the user's reliability, safety and energy saving. Build an intelligent energy service system, comprehensively use smart meters and intelligent power management terminal equipment to achieve efficient, scientific and skilled energy use.
The Acrel-3000 Power Management System is a customer-side power management system developed for these trends. The system measures some important circuits in the Unilever factory in Sichuan. Through the real-time measurement, storage and analysis of the energy used in the monitoring circuit, the energy consumption status of the entire measurement system is displayed in the form of a table or a graph to find out the high energy consumption. Point or unreasonable use of energy habits, in order to effectively save energy, users provide accurate data support for further energy-saving transformation or equipment upgrade.
This paper takes Sichuan Unilever as an example to briefly introduce the application of Acrel-3000 power management system in Sichuan Unilever power distribution system.
1 Project introduction
This project is the global production base of Unilever (Sichuan) built by Unilever in Pengshan County, Meishan City. Unilever (Sichuan) global production base is its third world-class green production base in China, with an investment of nearly 300 million yuan, covering a total area of ​​about 400 acres. The first phase mainly produces a full range of products of mysterious phosphorus-free washing powder. With an annual production capacity of nearly 200,000 tons, it is mainly supplied to the western China market. In the future, it will gradually produce a full range of products from Unilever China.
In view of the industrial nature of the project, real-time monitoring of the power distribution system and some water circuits in the plant area of ​​Unilever (Sichuan) global production base is realized, and real-time monitoring, data collection, storage and processing are carried out through the intelligent instrument and system background. The energy status of the monitoring area is displayed in real time in the form of various graphic reports. All the energy is stored in the back-end host of the system. Through the analysis of the data for a fixed period of time, the energy consumption status of the entire plant area is grasped, and a reasonable energy consumption plan and energy-saving measures are formulated according to the trend of energy use.
This project is mainly for the energy measurement of the important circuit of the switchgear in the substation, and the real-time monitoring of the water in some water circuits. There are a total of 99 water circuits in the project substation and in the plant. The Acrel-3000 power management system provides data collection and processing of smart meters in the form of graphs and reports, providing managers with specific power usage details.
2 User requirements
â— Monitoring information such as voltage, current, power, power factor and frequency is refreshed in real time and displayed visually and dynamically in a single graph. The information of each electric parameter, circuit name, CT ratio, current limit value and switch status of the circuit is displayed on each circuit sub-screen.
â— Real-time collection, display and storage of parameters of the smart water meter in the water circuit.
â— Draw a current trend curve for its load to facilitate analysis of the distribution operation of the loop
â— Over-limit alarm, set the over-limit alarm for the customer's specific loop
â— Power collection function for each loop, and automatically generate power report that meets customer management requirements
â— Alarm event record, which is convenient for maintenance personnel to maintain the circuit according to the nature of the event.
â— User rights management, different levels of rights to achieve different levels of operation.
3 design plan
3.1 Reference Standard
The system is designed to meet the manufacturing and testing standards listed below:
JGJ/T 16-92 "Electrical Design Code for Civil Buildings"
GB/J63-90 "Design Specification for Electrical Measuring Instruments for Electrical Installations"
GB/T13730 "General technical conditions for regional grid data acquisition and monitoring systems"
GB2887 "Technical Requirements for Computing Station Sites"
GB/50198-94 "Technical Specifications for Monitoring System Engineering"
DL/T 698.31-2010 Part 3.1: Technical Specifications for Power Information Collection Terminals - General Requirements
DL/T 698.35-2010 Part 3-5: Technical specification for power information collection terminal - Particular requirements for low-voltage centralized meter reading terminal
DL/T 698.41-2010 Part 4-1: Communication Protocol - Communication between the primary station and the energy information collection terminal
DL/T 698.42-2010 Part 4-2: Communication Protocols - Concentrator Downlink Communication Protocol
DL/T/814-2002 "Functional Automation System Functional Specifications"
3.2 System Architecture Design
In view of the scale and nature of the construction of Unilever in Sichuan and the nature of the joint development of the follow-up projects, the system department of Ankerui Electric Co., Ltd. based on the needs of users and the experience in the same nature of the project, the intelligence of the building The construction of the power distribution system is designed as follows: All the monitoring points in Sichuan Unilever are now equipped with intelligent power meters, and all adopt the standard Modbus-RTU protocol. The smart meters installed on site are connected by hand through the shielded twisted pair cable, and the data bus is directly laid to the duty room where the host is located. The data bus transmits data to the system host through a protocol conversion isolator. System diagram 1 is shown.
figure 1
4 system function
The upper computer software adopts Acrel-3000 power management system, and completes the functions of software monitoring and power monitoring in the upper computer through device configuration, database variable configuration and interface design.
4.1 Features
Acrel-3000 power management system adopts full Chinese interface, which is easy to operate and stable and reliable. Click the corresponding shortcut button to enter the corresponding system function module; the system has a system diagram display, simulation diagram display and network structure diagram display; the system has a friendly man-machine interface, and the display data is intuitive and convenient for users to consult.
4.2 Software features
4.2.1 Operating system
The software interface can be designed according to the characteristics of the project and the requirements of the customer. The initial interface is the “login interfaceâ€. The customer needs to enter the corresponding password through the user name to enter the system. The interface is shown in Figure 2.
Figure 2 login interface
4.2.2 Communication diagram
The communication diagram is a topology diagram showing whether the communication between the system and the instrument is normal. The change of the color of the interface module reflects the running status of each monitoring point of the entire system. The interface is shown in Figure 3.
Figure 3 Communication
4.2.3 Monitoring details
The monitoring details reflect the name of the entire system distribution circuit, the corresponding distribution system, and the main electrical parameters of the circuit. Through the display of real-time data, the operation data of each monitoring loop of the project is visually reflected, which is convenient for the manager to know the running status of the system in real time. The interface is shown in Figure 4.
Figure 4 Monitoring details
4.2.4 Parameter meter reading
The parameter report reflects the operational data of the monitoring loop of the project at a certain point in time, and the real-time parametric data at a current or past time point reflects the loop status. The main data includes: three-phase voltage, three-phase current, electric energy, active power, reactive power, power compensation factor, frequency. The interface is shown in Figure 5.
Figure 5 Parameter reading
4.2.5 Energy Report
The energy report is the management of the power consumption in the form of a report. The report can realize the functions of monthly meter reading, daily meter reading, hour meter reading, etc., and can be exported or printed in Excel at any time during the system operation. The interface is shown in Figure 6.
Figure 6 Energy Report
4.2.6 Trend curve
The trend curve can query each loop voltage, power load trend, view its historical trend line; help users enter the line trend analysis and fault recall. The load curve diagram interface is shown in Figure 7.
Figure 7 trend curve
4.2.7 Real-time alarm
The system also targets the telemetry of the main electrical parameters (including the current, voltage, frequency, power factor of the incoming loop and the current crossing alarm of the outgoing loop). You can also click to open the history alarm to call up the historical alarm interface. The interface is shown in Figure 8.
Figure 8 real-time alarm
5 Conclusion
Industrial energy intelligent management is an inevitable trend of future industrial management. The user's remote monitoring and real-time status control of the energy consumption in the plant has made the power management system an inevitable choice for distribution users. The application of the Acrel-3000 power management system introduced in the Sichuan Unilever project can be realized. The real-time monitoring of the monitoring circuits of Unilever in Sichuan can not only display the energy status of the circuit, but also have the network communication function, and can also form a power management system with the serial port server and computer. At the same time of system design, installation and commissioning, it is also a detailed combing of the energy structure of the entire plant. Through the detailed classification of energy use, the specific direction of the energy consumption of the entire plant area is clarified, so as to understand the operation status of each area in the plant area. The system realizes the analysis and processing of the collected data, and displays in real time the power usage status of each power distribution circuit in the substation, the pop-up alarm dialog box and the alarm sound prompt, and generates various energy reports, analysis curves, graphics, etc. It is convenient for remote meter reading of electric energy and analysis, research and development of corresponding energy assessment mechanism. The system is safe, reliable and stable, and solves the problem of unclear specific power consumption of each distribution circuit for the end users of the distribution system. It provides a real and reliable basis for the maintenance of the power system and the formulation of energy-saving measures.
references
[1]. Ren Zhicheng Zhou Zhong. Principles and Application Guidelines of Power Electrical Measurement Digital Instrumentation [M]. Beijing. China Electric Power Press. 2007. 4
[2]. Zhou Zhong. Application of power meter in electric energy metering of large commercial hotels [J]. Modern Building Electric 2010. 6
About the author: Yang Junjun, female, undergraduate. Position: Now working for Ankerui Electric Co., Ltd., contact number, mobile phone, QQ
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