Arkori Qingqing
Jiangsu Ankerui Electric Manufacturing Co., Ltd. Jiangyin, Jiangsu 214405, China
Abstract: Introduce Ganzhou Jintian Paper Industry Co., Ltd. to use smart power meters to collect various electrical parameters and switching signals at the distribution site. The system adopts the on-site local networking method. After networking, it communicates via the field bus and transmits it to the background. The Acrel-3000 energy management system realizes the real-time monitoring and management of the power distribution circuit in the distribution room.
Keywords: Jintian Paper; smart power meter; Acrel-3000; power management system;
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0, Overview
Ganzhou Jintian Paper Co., Ltd. was formally put into operation in March 2016 and is located in Lingang Industrial Park, Hejiang County, Luzhou City, Sichuan Province. The transportation is convenient and the environment is elegant. The company mainly produces medium and high-grade gray board paper and baby diapers. It covers an area of ​​700 mu, with a total investment of 3 billion yuan and an annual production capacity of 1.2 million tons. The total project is completed in three phases. The annual production capacity of the first phase project is 300,000 tons. The scale of the staff is nearly 1,000. Now it has three production lines (3400 long nets 1 and 3400 round nets 2), a steam turbine (25MW pumping type), a boiler (180T/H), and a sewage treatment plant (citing the most advanced IC tower Sewage treatment systems) and deep water terminals.
The project mainly involves the network multifunction meters in the distribution room of Jintian Paper Co., Ltd. The monitoring host is located in the duty room on the first floor underground.
1, demand analysis
In order to ensure the production management of electricity load statistics and analysis and real-time monitoring of hazards. It is necessary to carry out real-time online monitoring of parameters such as voltage, current, and power in the incoming and outgoing circuits in the distribution room of the project site. Once the monitoring point is monitored for abnormal parameters, the alarm can be detected in time and the relevant personnel take necessary measures to avoid safety accidents. The automatic meter reading function saves manpower and material resources, and the power trend curve function can intuitively display the working status and time of each loop, facilitating the user to find out abnormal power circuits and timely rectification, establishing a multi-level energy metering system to provide energy analysis basis .
This technical condition applies to the distribution room of Jintian Paper Co., Ltd. The supplier's products should have high safety and reliability, be easy to expand, and be easy to maintain and maintain. The product provided by the supplier shall meet at least the technical conditions, but it is not limited to this. The technical performance of the supplier shall meet the requirements for data monitoring of the power distribution room.
data collection
It automatically collects the analog data of all the electricity meters at the site and automatically collects the on-off status such as on-site switch status and fault status.
Supports real-time acquisition, automatic cycle acquisition (timing acquisition), configurable period (1 minute to 24 hours).
Support data transmission correctness test, abnormal data processing automatically.
Support multi-thread processing mechanism, improve data collection efficiency, and data acquisition for multiple devices at the same time.
The real-time display of data adopts the visual display mode of the main wiring diagram of the distribution box, and the switch disconnection and fault status of each loop can be seen directly.
Data analysis and processing
Comprehensive statistics and analysis of data need to achieve the following functions:
The statistics and calculations for hours, days, months, and years of electricity data for each device.
The maximum, minimum and average values ​​of the electrical load (active and reactive) of each equipment are calculated.
Statistics on the power usage (active and reactive) of each substation and the whole.
Data query and display
Requirements can facilitate the implementation of client inquiries and inquiries at all levels of management personnel, query interface can adapt to the requirements of all levels of management personnel can support flexible conditional combination of query and comparative analysis, various types of statistical analysis of data can be used flexibly using reports and other charts Intuitive display function.
The data display function is divided into three layers for operation level, management level, and decision level according to the different permissions of different users.
The operation layer has functions such as energy consumption analysis, cumulative usage, real-time monitoring, operation record and ratio, comparison, and benchmarking.
Management has functions such as energy statistics and analysis, comparison of classification items, and benchmarking.
The decision-making level has functions such as energy consumption data analysis, data deletion, and database import/export.
authority management
Requirements for different users to give different roles, can be authorized to function submenu, specific file records, data records.
The system requires a reasonably complete user security control mechanism, which can effectively protect the information resources in the application environment and prevent the loss, theft and destruction of information.
Energy Saving Improvement and Effect Evaluation
It is required to provide data support for the production of energy-saving retrofits and to provide an assessment of the effects before and after the energy-saving renovation.
parameter settings
Through the collection cabinet can set the loop transformer ratio, a variety of current and voltage protection settings.
Fault judgment and alarm have automatic fault judgment and use sound and light alarm function. The types of alarms include switch failures, voltage and current overruns, on-site acquisition module communication failures, and monitoring system communication failures. The alarm time is automatically recorded in the system database to facilitate user inquiries. The staff can always grasp the real-time operation status of the substations, find faults in the substations and make corresponding treatment, improve the management efficiency of the substations, and improve the safety of the electric power system. reliability.
2, system plan
Acrel-3000 system of Acrel according to the actual situation of Cangzhou Jintian Paper Co., Ltd., the overall network structure is directly connected to the data collector through the shielded twisted pair and then directly connected to the monitoring host of the power distribution room through the network cable to ensure the power management monitoring. System transmission stability and real-time performance.
1) Station control management
Station management The management personnel of the power monitoring system are the direct windows of human-computer interaction. In the project of Chenzhou Jintian Paper Co., Ltd., it mainly refers to the monitoring host placed in the underground power distribution room.
2) Network communication layer
The communication layer is mainly composed of a collector, an Ethernet device, and a bus network. The main function of the serial server is to monitor the on-site intelligent instrument; the main function of the Ethernet device and the bus network is to realize the data interaction between the substation and the main station, so that the distribution system management is centralized, informationized and intelligent, which greatly improves the The security, reliability and stability of the distribution system have truly reached an unattended purpose.
3) Field device layer
The field device layer is a data acquisition terminal, which is mainly composed of smart meters. The smart meter is connected to the communication server through the shielded twisted pair RS485 interface, and uses the MODBUS communication protocol bus type connection to reach the communication host through the communication server. Implement remote control.
System structure diagram
3, system function
The real-time monitoring system diagram of the substation is the main monitoring screen. It mainly monitors the running status of all loops of the substation in real time. The red represents the closing and the green represents the opening. In the system diagram, you can visually see the operating parameters and status of each incoming and outgoing line. You can see all the conventional power parameters on the outgoing side of the transformer, such as: three-phase voltage, current, active power, reactive power, and power factor. , frequency, active power, etc. As shown below:
One system diagram
The remote signaling and telemetry alarm functions mainly complete the monitoring of the switching operation status and load incoming line of the low-voltage outlet loops, and indicate the specific alarm position and audible alarm to the switch displacement and load over-limit pop-up alarm interface to remind the on-duty personnel to deal with it in time. The load limit is freely set under the corresponding authority.
The event alarm recording function mainly completes the recording of the alarm information events and the time of occurrence within the query period, provides the basis for the personnel on duty, and analyzes the causes of the accident, as shown in the following figure:
Alarm function real-time query
The parameter reading function mainly inquires into the electrical parameters of the low-voltage outlet circuit. Supports electrical parameter query at any time, with functions such as data export and report printing. The report queries the electrical parameters of the low-voltage circuits of the power distribution room of the distribution room of Zhangzhou Jintian Paper Co., Ltd., including: three-phase current, active power and active power. The names of the loops in this report are associated with the database to facilitate the user to modify the loop name. As shown below:
Electrical parameter reading
The electricity consumption report function can select the time period to inquire, supports the accumulated electricity inquiry at any time, and has the functions of data export and report printing. Provide accurate and reliable power report for duty personnel. The loop name of the report is associated with the database, which is convenient for the user to modify the loop name. As shown in the figure below, the user can directly print the report and save it to another location in EXCEL format. As shown below:
Energy report
The schematic diagram of the system communication structure mainly shows the networking structure of the system. The system adopts a hierarchical distributed structure and simultaneously monitors the communication status of the equipment at the bay level. Red indicates normal communication and green indicates communication failure. The following figure shows the substation communication status.
Communication structure diagram
4 Conclusion
In the application of power distribution facilities today, the distribution security of the project is of utmost importance. The application of the Acrel-3000 energy management system described in this article in Zhangzhou Jintian Paper Co., Ltd. can realize the power supply and distribution circuit for the power distribution room. The real-time monitoring can not only show the power status of the loop, but also has the function of network communication. It can form an energy management system with a serial server and a computer. The system analyzes and processes the collected data. It displays the running status of each distribution circuit in the power distribution room in real time. It has a pop-up alarm dialog box and voice prompts for the overload threshold, and generates various energy reports, analysis curves, graphics, etc. Remote meter reading as well as analysis and research of electric energy, the system is safe, reliable, and stable. It provides a real and reliable basis for solving electricity problems in the commercial plaza project and achieves better corporate benefits.
references:
[1] "Principles and Application Guide for Power Electronic Measurement Digital Meters", Ren Chengcheng, Zhou Zhong, China Electric Power Press
[2] "Application of Power Monitoring System in Power Supply and Distribution Design", Gao Shihong, Science and Technology Wind [3] "Electric Power Monitoring Applied to 10kv Power Supply and Distribution Design", Yao Qiang, Science and Technology World
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