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Xu Shuang An Kerui Electric Co., Ltd., Jiading, Shanghai 201801, China
Abstract: Introduce the Baotou Suning Plaza project, using intelligent power meters to collect various electrical parameters and switching signals from the power distribution site. The system adopts the on-site networking mode. After the network is connected, it communicates through the field bus and travels to the background. Through the Acrel-3000 power management system, real-time monitoring and management of the power distribution circuit power distribution is realized.
Key words: Baotou Suning Plaza; large public building; intelligent power meter; Acrel-3000; power management system
0 Overview
Baotou Suning Square Project is located in the center of Baotou, the core of Baotou. The total construction area is 180,000 square meters, the building height is 110 meters, the ground floor is 27 floors, and the underground is 2 floors. It gathers Suning Yundian, fashionable restaurants, apartments and shopping centers.
The project has two 0.4KV transformer substation rooms on the ground floor. The T1 and T2 transformers are installed in the 1# commercial low voltage transformer room. The T3, T4, T5, T6, T7 and T8 transformers are installed in the 2# commercial low voltage. Transformer distribution room. 1# commercial low-voltage transformer and power distribution room inlet cabinet, capacitor cabinet, mother cabinet and important outlet circuit total 11 PZ80-E4/C multi-function instruments, other outlet circuits total 59 PZ72-E4/C multi-function instruments; 2 #Commercial low-voltage transformer room input cabinet, capacitor cabinet, mother cabinet and important outlet circuit total 34 PZ80-E4/C multi-function instrument, other outlet circuit total 174 PZ72-E4/C multi-function instrument.
1 Demand analysis is to ensure the statistics and analysis of the electrical load of Baotou Suning Plaza and real-time monitoring of dangerous sources. Real-time online monitoring of parameters such as voltage, current, and power in the incoming and outgoing circuits of the two commercial low-voltage power distribution rooms at the project site is required. Once the monitoring point is abnormally monitored, the alarm can be detected in time, and the relevant personnel take necessary measures to avoid the occurrence of a safety accident. The automatic meter reading function saves manpower and material resources. The power trend curve function can intuitively display the working status and time of each loop, which is convenient for the user to find out the abnormal power circuit and timely rectify and establish the energy multi-level metering system to provide energy analysis basis. .
The technical conditions apply to the energy management of the 1# and 2# commercial low-voltage distribution rooms in Baotou Suning Plaza. Supplier products should be highly safe and reliable, easy to expand, and easy to maintain and maintain. The products provided by the supplier shall meet at least the technical conditions, but not limited to this, and its technical performance shall meet the requirements for data monitoring of the power distribution room.
Data acquisition automatically collects analog data of all power meters in the field, and automatically collects switch data such as field switch status and fault status.
Support real-time acquisition, automatic cycle acquisition (timed acquisition) configurable cycle (1 minute to 24 hours).
Support data transmission correctness test, abnormal data automatic processing.
Support multi-thread processing mechanism, improve data collection efficiency, and can collect data for multiple devices at the same time.
The real-time display of the data adopts the visual display mode of the power distribution cabinet at one time, and the circuit breakers are disconnected and the fault status is visually visible.
The comprehensive statistics and analysis of data analysis and processing data need to achieve the following functions:
The statistics and calculations of the hours, days, months, and years of the electricity consumption data of each equipment.
Count the power consumption of each outlet circuit and the whole (active, reactive).
The data query and display requirements can facilitate the client query and the query of all levels of management personnel. The query interface can meet the requirements of managers at all levels to support flexible conditional combination query and comparative analysis. The data of various statistical analysis can be flexibly used in the report. A variety of graphical ways to display features.
The data display function is divided into operation layer and management layer according to the different permissions of different users.
Rights management requires different users to be assigned different roles, and can be authorized to function submenus, specific file records, data records, and so on.
The system requires a reasonable and complete user security control mechanism to effectively protect the information resources in the application environment and prevent information loss, theft and destruction.
The fault alarm fault judgment and alarm have automatic fault diagnosis and adopt the sound and light mode alarm function. The types of alarms include microcomputer protection switch quantity displacement, voltage and current over-limit, on-site comprehensive insurance or communication failure between instrument and monitoring system. The alarm time is automatically recorded in the system database, which is convenient for users to query. The staff can grasp the real-time running status of the power distribution room at any time, find the fault of the power distribution and operate accordingly, improve the management efficiency of the power distribution, and improve the safety and reliability of the power system. Sex.
2 System Solution Ankerui Acrel-3000 Power Management System According to the actual situation of Baotou Suning Plaza, the overall network structure uses a data acquisition box with a built-in serial server in each of the two commercial low-voltage power distribution rooms, each commercial low-voltage power distribution. The indoor low-voltage inlet and outlet instrument is directly connected to the corresponding serial port server through the shielded twisted pair cable, and then connected to the nearest weak electric well switch through the network cable, and the instrument data is transmitted to the monitoring of the fire control room through the internal network of Baotou Suning Plaza. The host ensures the stability and real-time performance of the power management monitoring system transmission.
1# commercial low-voltage power distribution room has 11 PZ80-E4/C multi-function meters, 59 PZ72-E4/C multi-function meters, the instrument is divided into four RS485 buses to connect to the serial port of 1# commercial low-voltage power distribution room data collection box. On the server; 2# commercial low-voltage power distribution room has a total of 34 PZ80-E4/C multi-function meters, 174 PZ72-E4/C multi-function meters, the instrument is divided into 12 RS485 buses connected to 2# commercial low-voltage power distribution room On the serial server in the data collection box.
1) Station management management station management The management personnel for the power monitoring system are direct windows for human-computer interaction. In the Baotou Suning Plaza project, it mainly refers to the monitoring host placed in the fire control room.
2) Network communication layer Communication layer is mainly composed of Nport5610-8 in 1# commercial low-voltage power distribution room, I-7520R in serial port conversion isolator, Nport5610-16 in 2# commercial low-voltage power distribution room, serial port conversion The isolator I-7520R consists of sixteen Ethernet devices 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 station control management layer and the field device, so that the distribution system management is centralized, informationized and intelligent. Improve the safety, reliability and stability of the power distribution system, and truly achieve the goal of unattended.
3) Field equipment layer The field equipment layer is a data acquisition terminal, which is mainly composed of low-voltage intelligent instruments. The intelligent instrument is connected to the serial port server corresponding to the commercial low-voltage power distribution room through the shielded twisted pair RS485 interface and the MODBUS communication protocol bus type connection.
System structure diagram
The on-site connection of the intelligent instrument indicates that the on-site instrument is connected by hand to the serial port server in the data collection box of the corresponding power distribution room through the shielded twisted pair (RVSP2*1.0). The number of smart meters connected to each bus is about 20, The data is uploaded to the local monitoring terminal via the intranet of Baotou Suning Plaza. The specific connection diagram is as follows:
3 system function
The real-time monitoring system diagram of the substation is the main monitoring screen. The main operation status of all circuits in the substation is monitored in real time. Red represents the closing and 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 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 can be used to visually check the load operation of the loop. View real-time and historical trend curves, click the corresponding button or menu item on the screen to complete the corresponding function switching; help users 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, giving different users the rights to different roles, can be authorized to function submenus, specific file records, data records, and so on. The figure below shows the rights configuration interface.
User rights management
4 Conclusion
In today's distribution facilities, the distribution safety of large public building projects is of paramount importance. The application of the Acrel-3000 power management system described in this paper in the Baoning Suning Plaza can realize the power supply and distribution loops of the power distribution room. Real-time monitoring, the system analyzes and processes the collected data, displays the running status of each distribution circuit in the distribution room in real time, and has a pop-up alarm dialog box, sound prompts for the load limit, and generates various energy reports, analysis curves, and graphs. In order to facilitate remote meter reading and analysis and research of electric energy, the system is safe, reliable and stable, and provides a reliable and reliable basis for solving the problem of electricity use for the project.
references:
[1] "Guidelines and Application Guidelines for Digital Measurement of Electric Power Measurement", Ren Zhicheng, Zhou Zhong, China Electric Power Press
[2] "Application of Power Monitoring System in Power Supply and Distribution Design", Gao Shihong, Technology Wind
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