Zhang Qiaoyu
Ankerui Electric Co., Ltd., Shanghai Jiading 201801;
Abstract : This paper introduces the first-phase power management system of Dajiang County Community in Baoli Real Estate, Liuzhou. Intelligent power meters are used to collect various electrical parameters and switch signals at the distribution site. The system adopts on-site local networking method. After networking, it communicates via the fieldbus and transmits it to the background. The Acrel-3000 power management system realizes real-time monitoring and power management of power distribution circuit substations.
Keywords: energy management configuration software power system energy metering system integration Poly Real Estate
introduction
With the development of society and the widespread use of electricity, intelligent power management systems have become an inevitable choice for large-scale smart communities. The application of the power meters and the Acrel-3000 power management system introduced in this article will be applied to the Phase I project of Poly River County in Liuzhou. The system can realize remote telemetering and remote communication functions, real-time display of on-site electrical parameters, and convenient viewing by on-duty personnel; setting advanced-user value-setting modification functions also enhances the safety factor of on-duty personnel's operation in a humane manner; Data analysis, processing, and generate a variety of energy reports, analysis curves, bar graphs, etc., to facilitate the remote meter reading and analysis of electricity, research; alarm window pop-up helps to remind on duty personnel in a timely manner to check the status of field equipment.
Project Overview
Guangxi Poly was established in January 2005, with “Culture, Real Estate, and Harmonious Life†as the company's core brand proposition. It has always been based on advanced development concepts, excellent product quality, and excellent service management to create a fine example of human settlements. Liuzhou Baoli Real Estate Co., Ltd. is a wholly-owned subsidiary of Guangxi Poly Real Estate Group. The company was established in November 2009 and officially launched the “Dajiang County†project in Baoli on September 7, 2010. The project site is regular in shape and accounts for 254.1 acres of land, the volume ratio of 3.896, a total of 27, a total construction area of ​​832901.5 square meters, of which residential area of ​​476568.7 square meters, commercial 180,000 square meters, basement area of ​​230,000 square meters. The project boasts an excellent 800-meter-long advantage of merging east-facing riverfronts and is the most beautiful section of the Liujiang River. It is the first large-scale hydrophilic city complex integrating commerce, hotel apartments, tourism and leisure, and high-end residential facilities. .
Liuzhou Baoli Real Estate Co., Ltd. “Daijiang County†Residential Area (Phase I) Power Management System Project has a total of 2 special-purpose rooms, which are located in the 2nd floor of the residential area and the first floor of the 6# building, and the control center is located in the 8# building. The two special-purpose houses all contain high-pressure and low-pressure parts. There are 67 outlet and outlet circuits in the 2# floor special-purpose room, and there are 46 inlet and outlet circuits in the 6# floor special-purpose room.
User needs
Complete the measurement of each feeder circuit in the special power distribution room. The meter should be installed in the cabinet according to the equipment drawing, and complete the functions of remote meter reading, real-time current and voltage monitoring, fault monitoring, and alarming of the entire system to achieve automatic generation. Work log, printing and other functions; Far-reading system work also includes: a centralized signal collector is installed in each special room, each meter information is concentrated in the collector, the signal of the collector is transmitted in the form of TCP/IP. According to the special system feeder feeder loop meter settings, provide remote meter reading, current voltage, phase loss, faults and other remote monitoring of the system diagram (focus on the management of the 8# floor control center);Design
Ancorui Electric Co., Ltd. chose the Acrel-3000 energy management system based on the actual conditions of the first phase of the site of Liuzhou Poly Group.
Acrel-3000 meets standards
This technical program is based on the current national and electric power industry's effective standards. The non-insigned part of the national standard should refer to the latest IEC standards and specifications. If there are contradictions between the standards, the higher standards shall prevail.
ISO/IEC11801 International Integrated Cabling Standard
JGJ/T 16-92 Civil Building Electrical Design Code
GB/50198-94 "Technical Specifications for Monitoring System Engineering"
GB/T13730 General Technical Conditions for Data Acquisition and Monitoring System of Regional Power Grid
GB2887 "Technical Requirements for Computing Station Sites"
Acrel-3000 Design Solution
Ancorui Electric Co., Ltd. designed the Acrel-3000 power management system for the Liuzhou Poly Real Estate Dajiang County Phase I project for the first phase of the Liuzhou Poly Real Estate Co., Ltd. project; the project's Acrel-3000 transmission and distribution monitoring system is mainly divided into Layer 3: Station management layer (IPC, printer, UPS power supply), communication management layer (communication collection box, including serial port server and switching power supply, etc.), field device layer (field intelligent device).
The communication cable of the IO equipment in the site adopts RVSP 2*1.0 shielded twisted pair, connects the field instrument to the communication manager in the communication collection box, collects the data by Modbus-RTU communication protocol, and then walks the LAN to the data. Uploaded to the monitoring background in Building 8# of a building in the community.
4 system function
According to the site's requirements for the system, Ankerui Electric Co., Ltd. designed the project system interface and functions, the specific display interface is as follows:
4.1 System main interface
Power distribution schematic interface: visually and dynamically display voltage, current, power, power factor and frequency monitoring information in one map format to meet the on-site requirements.
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4.2 Report Statistics
The active power data collected by the system is automatically generated according to the name of the loop and has a report printing function. It can query and print the power consumption in a certain period of a certain loop, and these reports can also be in Excel format. Export.
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4.3 Trend Curve
Curve trend: Achieved the user through the current draw trend curve for each distribution circuit, analysis of the circuit distribution operating conditions. The measurement data range can be set in the curve for easy viewing. The curve can also be set to start time and time interval to facilitate the user to view the curve at any time.
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4.4 event alarm
Event alarm: the content of the limit alarm, the alarm value, the person on duty, and the type and time of the action. At the same time, the alarm status of each monitoring point or the abnormal power supply is used to facilitate the management personnel to grasp and analyze the distribution operation situation in real time. As shown in the figure below, the time and loop name of the event can be automatically recorded so that the user can query and remember the cause of the fault.
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5 operation effect
The real-time nature of the data: Before the implementation of the project, the on-site data is mainly copied manually. The time of each loop is not uniform, and it can be of poor quality. After the project is implemented, it is collected in real time in the background, and the comparability is strong. Storage management: paper records before the project implementation, turn over the containers when inquiries, long-term volatility, data date management complex; after the implementation of the project computer storage, data can be stored for more than 5 years, query speed, just a mouse, quickly and accurately. The overall analysis: Before the implementation of the project, the electricity consumption in each period and the power consumption of each circuit can't be compared horizontally and vertically; after the project is implemented, the curve analysis is performed, the peak-to-valley period is obviously contrasted, and it is convenient for peak-to-peak valley filling, and the allocation of three-phase electricity is relatively balanced. Data security: Decentralized management before project implementation, manual scheduled backup, inaccurate backup of continuous data, centralized management after project implementation, automatic back-up of the system. Equipment management: Before the implementation of the project, each drawer cabinet circuit should be turned on and off at the scene, and there should be no alarm when the power is turned off. After the project is implemented, it is clearly displayed through a system diagram at the backstage. When the loop is tripped, it is automatically recorded in the background and is accompanied by an automatic alarm. Load adjustment: Before the implementation of the project, it is difficult to adjust the load balance of the three-phase loop; after the project is implemented, the currents of the loops are distributed and managed in real time so that the three-phase currents are balanced and the log is recorded.Customer Reviews
After completion of the Acrel-3000 power management system, the electric watchman was reduced, real-time monitoring of the on-site information was realized, and electrical hazards were discovered through the application of the alarm window, timely detection of electrical faults, prevention of overload operation, etc.; and human-friendly electricity The display of degree reports and bar graphs not only saves a lot of labor costs for the users, but also analyzes the electricity consumption in various periods and realizes the intelligence of the district's electric energy management. Since the system has been running so far, the operation has been stable and normal, and it has been highly praised by users. At the same time, the labor cost saved by the operation of the system has basically returned the investment to the system at that time.
references:
[1]. Ren Chengcheng, Zhou Zhong. Principles and Application Guide for Digital Meters for Electric Power Measurement [M]. Beijing. China Electric Power Press, 2007. 4
About the Author:
Zhang Qiaoyu, female, undergraduate, Ankerui Electric Co., Ltd., engineer,
Technical communication: 021-69155257 qqmail@qq.com
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