Abstract: This article introduces the Baotou Suning Square project, adopts intelligent power meters, and collects 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. The comprehensive statistics and analysis of data analysis and processing data need to achieve the following functions: 2 System Solution Acrel Acrel-3000 Power Management System According to the actual situation of Baotou Suning Square, the overall network structure adopts a data collection box with built-in serial servers installed in two commercial low-voltage distribution rooms, each commercial low-voltage power distribution The indoor low-voltage inlet and outlet instruments are directly connected to the corresponding serial port server through the shielded twisted pair and then connected to the nearest weak-well switch through the network cable. The data of each instrument is transmitted to the first-floor fire control room through Baotou Suning Square's internal network. The host computer ensures the stability and real-time performance of the power management monitoring system. The smart meter field connection indicates that the field instrument is connected in a hand-in-hand manner through a shielded twisted pair (RVSP2*1.0) to the serial port server in the data collection box of the corresponding power distribution room. The number of smart meters per bus connection is about 20, After that, the data was uploaded to the local monitoring terminal via the intranet of Baotou Suning Square. The specific connection diagram is as follows: 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 intuitively see the operating parameters and status of each incoming and outgoing line. You can see all the conventional power parameters of the low-voltage cabinet, such as: three-phase voltage, current, active power, reactive power, power factor, Frequency, active power, etc. As shown below: Communication structure diagram The load trend curve interface allows you to visually check the load operation of the loop. View real-time and historical trend curves, click the corresponding button or menu item to complete the switching of corresponding functions; help the user to enter the trend analysis and fault recall, with curve printing function. Provides intuitive and convenient software support for analyzing the health of the entire system. Trend graph User rights management, assigning different roles to different users, can be assigned to function submenus, specific file records, data records, etc. The following figure shows the permission configuration interface. User rights management 4 Conclusion In the application of power distribution facilities today, the distribution security of large-scale public building projects is of utmost importance. The application of the Acrel-3000 energy management system introduced in Baotou Suning Square can achieve power supply to the power distribution circuit of the distribution room. The real-time monitoring system analyzes and processes the collected data, displays the running status of each distribution circuit in the power distribution room in real time, and has a pop-up alarm dialog box and voice prompts for the overload threshold, and generates various energy reports, analysis curves, and graphs. Such as, to facilitate remote meter reading and analysis, research, the system is safe, reliable, stable, to provide a real and reliable basis for the project to solve power problems. Roll Bending Machine,Bow Girder Roll Former Machine,Car Bow Girder Folding Machine,Bow Girder Folding Machine Unovo Machinery Co., Ltd. , https://www.rollformingprofile.com
Keywords: Baotou Suning Square; large-scale public buildings; smart power meter; Acrel-3000;
0 Overview
Baotou Suning Square Project is located in the center of Baotou’s most central location, Steel Street, with a total construction area of ​​180,000 square meters, a building height of 110 meters, 27 floors above the ground, and 2 floors underground, bringing together Suning Yundian, stylish restaurants, apartments and shopping centers.
There are two 0.4KV transformer substations on the ground floor of this project, of which the T1 and T2 transformers are installed in the 1# commercial low-voltage transmission and distribution room, and the T3, T4, T5, T6, T7, and T8 transformers are installed at the 2# commercial low voltage. Transform the power distribution room. 1# PZ80-E4/C multi-function instrument for 1 line of commercial low-voltage transmission and distribution room incoming line cabinets, capacitor cabinets, mother-in-line cabinets and important outgoing lines, and 59 PZ72-E4/C multi-function instruments for other outgoing lines; 2 #34 total PZ80-E4/C multi-function instruments for the commercial low-voltage power distribution room incoming line cabinets, capacitor cabinets, mother-in-line cabinets and important outlet circuits, and 174 PZ72-E4/C multi-function meters for other outlet circuits.
1 Demand analysis in order to ensure the statistics and analysis of the electricity load of Baotou Suning Square and the real-time monitoring of hazard sources. It is necessary to carry out real-time online monitoring of parameters such as voltage, current and power in the incoming and outgoing circuits of the two commercial low-voltage distribution rooms on 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 power management of the commercial low-voltage power distribution room 1# and 2# in Baotou Suning Plaza. 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 acquisition Automatically collects all analog data of the power meter at the site and automatically collects on-off status data 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 is based on a visual display mode of the power distribution cabinet. The switch disconnection and fault status of each circuit are visible.
The statistics and calculations for hours, days, months, and years of electricity data for each device.
Statistics the power consumption of each outlet circuit and the overall (active and reactive power).
Data query and display requirements can facilitate the implementation of client inquiries and query at all levels of management personnel. The query interface can meet the requirements of all levels of management personnel and can support flexible conditional combination query and comparative analysis. Various types of statistical analysis data can be flexibly adopted for reporting. And other charts and other intuitive display features.
The data display function is divided into operation level and management level according to different users' different rights.
Rights management requires that different users be given different roles and can be authorized to function submenus, specific file records, data records, and so on.
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.
Fault alarm fault judgment and alarm have automatic fault judgment and adopt sound and light mode alarm function. Types of alarms include microcomputer protection switching, voltage and current over-limits, on-site protection or instrument and monitoring system communication failures. The alarm time is automatically recorded in the system database to facilitate the user's query. The staff can always grasp the real-time running status of the power distribution room, find faults in the transformation and distribution operations and make corresponding treatment, improve the management efficiency of the transformation and distribution, and improve the safety and reliability of the power system. Sex.
There are 11 PZ80-E4/C multimeters and 59 PZ72-E4/C multimeters in the 1# commercial low-voltage power distribution room. The instrument is divided into four RS485 buses and connected to the 1# commercial low-voltage power distribution room data collection box. There are 34 PZ80-E4/C multi-function instruments in the 2# commercial low-voltage distribution room, 174 PZ72-E4/C multi-function instruments, and the instrument is divided into 12 RS485 buses to connect to the 2# commercial low-voltage power distribution room. Data collection box on the serial server.
1) Station Control Management Station Control The management personnel of the power monitoring system are the direct windows of human-computer interaction. In Baotou Suning Square Project, it mainly refers to the monitoring host that is placed in a layer of fire control room.
2) Network communication layer The communication layer is mainly composed of Nport5610-8 in 1# commercial low voltage power distribution room, seven I-7520R serial conversion isolators, serial port conversion in Nport5610-16 in 2# commercial low voltage power distribution room, and serial port conversion. Isolator I-7520R consists of sixteen Ethernet devices and a bus network. The main function of the serial server is to monitor the field smart meters; the main function of the Ethernet equipment and the bus network is to realize the data exchange between the station management layer and the field devices, so that the power distribution system management is centralized, informatized, and intelligent. The safety, reliability and stability of the distribution system have been improved and the unattended purpose has been achieved.
3) Field device layer The field device layer is a data collection terminal, which is mainly composed of low-voltage smart meters. The smart meter is connected to the serial server of the corresponding commercial low-voltage distribution room through a shielded twisted pair RS485 interface and a MODBUS communication protocol bus type connection.
System structure 
