This paper mainly introduces Shanghai Silent Stainless Steel Products Co., Ltd. to monitor the low-voltage power distribution system by using Acrel-2000 power monitoring system, and master the power running status of the substation in real time and record it. At the same time, the system adopts B/S mode to realize remote monitoring. Management and Maintenance Summary: This article mainly introduces Shanghai Sile Stainless Steel "target=_blank> Stainless Steel Products Co., Ltd. using Acrel-2000 power monitoring system to monitor low-voltage power distribution system, real-time control of substation power running status and record, The system adopts B/S mode to realize remote monitoring, which is convenient for management and maintenance. Photoluminescent Exit Sign,Luminescent Sign,Afterglow Exit Sign,Afterglow Tunnel Sign JINAN REALGLOW CO.,LTD , https://www.realglowsign.com
Keywords: power monitoring; Acrel-2000; Sile; remote monitoring
0 Project Overview
There are 2 transformers in the transformer room of the project, one of which has a capacity of 1250kVA and the other has a capacity of 800kVA. There is only one transformer room in the field, and the duty room is located next to the power distribution room. The instrument of the original low-voltage incoming line is an old-fashioned pointer instrument. The current or voltage can only be viewed at the substation site. It is impossible to view other electrical parameters, and the data cannot be recorded. It is necessary to go to the site to read the meter regularly. On the line side, the original mechanical watch is changed to the multi-function meter of our company's ACR330ELH model. Place a 4-channel 485 interface data acquisition box in the power distribution station (the 485 interface of the collection box is reserved for subsequent expansion), complete the collection of instrument data, and convert the data into TCP/IP mode for transmission via the network cable. On the monitoring host of the duty room.
1 User requirements
Due to the continuous development of the company, the transformer has a large capacity burden, and even exceeds the rated capacity. Therefore, it is urgent to monitor the two low-voltage incoming loops in real time. Now, for this situation, there are several requirements:
1) Monitor the operation status of the two-way low-voltage incoming circuit and master the operation of the power equipment of the substation;
2) Report the various status monitoring and historical data in the power distribution system, and the system can realize the daily, weekly, monthly and annual load report management;
3) For the load condition of the transformer, an over-limit alarm can be made to achieve the peak-cutting valley, so that the transformer is always in good working condition;
4) Improve the efficiency of electrical system operation and management, and greatly improve the management level;
5) Data recording and fault data recording;
6) Implementing no or few people on duty in each substation;
7) The health of the loop can be viewed remotely.
2 Design Principles Reference Standards
2.1 Design principles
1) Openness: This system will involve the equipment technology of different manufacturers and the expansion requirements of the system. In the product technology selection of this project, avoid using proprietary technology, so that the system hardware and software platform is fully open. Sex.
2) Advancement: The software and hardware platform construction of the system, the design and development of the application system, and the product technology adopted by the system maintenance management all take into account the current development trend of the technology, and adopt relatively advanced and relatively mature market product technologies to meet the future of the system. Development needs.
3) High performance: The system design should be comprehensively analyzed from the perspectives of server processing capability, network bandwidth transmission capability, software system efficiency, etc., rationally design the structure, and make the system have sufficient processing capacity to adapt to a large amount of data processing and user access requirements. System service quality.
4) Security: The system attaches great importance to security issues. From the operating system layer, network layer, and application layer, there are corresponding measures to address the requirements of transmission security, system security and information security.
5) Reliability: The system should consider the system structure, network structure, technical measures, equipment selection and other aspects to ensure that there is no single fault node in the system to achieve 7X24 uninterrupted service.
6) Scalability: In this system, all network, server, storage, and application software are designed to follow the scalable principle to expand as the requirements evolve. The system adopts a modular structure, which has good compatibility and expandability, so that devices and systems of different manufacturers can be integrated into the same platform, and the system can be easily expanded according to user requirements in the future.
2.2 Reference Standard
1) ISO/IEC11801 "International Integrated Wiring Standards"
2) GB/50198 "Technical Specifications for Monitoring System Engineering"
3) GB50052-2009 "Design Specification for Power Supply and Distribution System"
4) GB50054-2011 "Design Specification for Low Voltage Distribution"
5) DL/T 698.1-2009 "Part 1: General"
6) DL/T 698.2-2010 "Part 2: Technical Specifications for Master Stations"
7) DL/T 698.31-2010 "Section 3.1: Technical Specifications for Power Information Collection Terminals - General Requirements"
8) DL/T 698.35-2010 "Part 3-5: Technical specification for power information collection terminal - Particular requirements for low-voltage centralized meter reading terminal"
9) DL/T 698.41-2010 "Part 4-1: Communication Protocol - Communication between the primary station and the power information collection terminal"
10) DL/T 698.42-2010 "Part 4-2: Communication Protocol - Concentrator Downlink Communication Protocol"
11) DL/T 698.41-2010 "Part 4-1: Communication Protocol - Communication between the primary station and the power information collection terminal"
12) DL/T 698.42-2010 "Part 4-2: Communication Protocol - Concentrator Downlink Communication Protocol"
3 solutions
The solution of this project is: 2 transformers incoming line instrument is modified and replaced into Ankerui ACR330ELH, a data acquisition box is arranged in the power distribution room, the instrument RS485 bus access data collection box; the data collection box uplink network port is connected to the background power monitoring System; at the same time, the system accesses the LAN of the plant to realize WEB release.
3.1 Field device layer
Field equipment layer instruments mainly include: Ankerui ACR330ELH multi-function power meter.
3.2 Network communication layer
Communication medium: ACR330ELH adopts shielded twisted pair cable to access data acquisition box through RS485 bus; data acquisition box uplink network cable accesses background power monitoring system; power monitoring system network cable accesses factory area LAN switch to realize WEB release.
3.3 Station management
The station management layer is for the management of the distribution network, which is directly facing the user. This layer is also the uppermost part of the system, mainly by power system software and necessary hardware equipment such as computers, printers, UPS, etc. The software part has a good human-computer interaction interface, and reads various kinds of data information collected by the front-end machine through the data transmission protocol, and automatically performs calculation and processing, and reflects the operation state of the scene by means of graphics, digital display, sound, etc., and Accept the operation instructions of the management personnel, send and detect the execution status of the operation in real time to ensure the normal operation of the power supply unit; the energy measurement management function is designed to conform to the user's report format, and the data in the report is strictly measured according to various standards. Users only need to find the print, which greatly facilitates the operation and improves the work efficiency. The system structure topology is as follows:
4 system function
Distribution monitoring
The Acrylic Acrel-2000 Power Monitoring System has a friendly human-machine interface that allows you to view the distribution and connection of the distribution circuits as well as the main electrical parameters. The main data includes: three-phase current, three-phase voltage, power of the incoming loop, power, power factor, and circuit name. After logging in to the system as an administrator, you can click on the loop name in the system map to modify the loop name directly. After the modification, the system will automatically save it. In this interface, you can view the detailed parameters of the three-phase table. Each loop icon and bus icon of the system diagram will display green when there is no power, and will display red after power-on to distinguish.
2. Load curve
The Acrylic-Acrel-2000 power monitoring system designed a load trend curve for the total incoming line of the distribution system (or the exit of critical loads). It is convenient for distribution and maintenance personnel to keep abreast of the demand of power consumption and the load of power supply system to ensure the reliability of power supply and provide guarantee for the energy use rights of user units. With this function, it is also possible to analyze the growth trend of energy demand, adjust the demand declaration in a timely manner, and reduce the excess payment due to excessive deviation of demand.
3. Electrical parameter report
The Acrylic-Acrel-2000 power monitoring system has the function of storing and managing real-time power parameters and historical power parameters. All real-time data collected, sequence event records, etc. can be saved to the real-time database. In the monitoring screen, you can customize the parameters that need to be queried, the time period of the query, or select the number of records that have been updated recently, and display them in a report mode. This feature makes it easy for users to conduct accident tracking queries.
4. Energy report
The Encore-Acrel-2000 power monitoring system reflects the integrity of the measurement system with a rich data report. The system has the function of summarizing and counting the periodic meter reading of each loop. The user can freely query the power consumption status of each power distribution node in any time period since the normal operation of the system, that is, the statistical analysis report of the power consumption of the loop of the node. This function makes the electricity use visible and transparent, and can be traced when the power consumption error is too large to maintain the correctness of the measurement system.
5. Telemetry real-time and historical alarms
The Acrylic-Acrel-2000 power monitoring system is equipped with a remote alarm configuration function. The system can monitor and alarm the telemetry alarm signal in real time. When the system alarms, the information voice prompt can be made, and the alarm screen is automatically popped up. The system can store the telemetry alarm data, which is convenient for users to trace the system alarm events.
6. User Rights Management
Ankerui Acrel-2000 power monitoring system sets up user rights management function to ensure the safe and stable operation of the system. Unauthorized operations (such as power distribution loop name modification, etc.) can be prevented by user rights management. You can define login names, passwords, and operation rights for users of different levels to provide reliable security for system operation and maintenance management.
7. B/S based web application
Acrylic's Acrel-2000 power monitoring system is equipped with a powerful WEB page publishing function, which enables users to view real-time data, monitoring images, historical data, browsing effects and Acrel in the system through Windows-based IE or other mainstream browsers. The system screen seen by the -2000 server is identical.
5 Conclusion
With the increasing demand for intelligent management of user-side distribution and distribution, the application of power monitoring systems has become a development trend. The application of the Acrel-2000 power monitoring system introduced in the project of Shanghai Sile Stainless Steel "target=_blank> Stainless Steel Products Co., Ltd. realized the transformation of Shanghai Sile Stainless Steel "target=_blank> Stainless Steel Products Co., Ltd. The monitoring network has been expanded to achieve remote monitoring. The system analyzes and processes the collected data, displays the running status and alarm status of each monitoring device in real time, and generates various reports, analysis curves, graphics, etc., which is convenient for the administrator to carry out equipment management and operation and maintenance. The system is safe, reliable and stable, and provides a scientific basis for the maintenance of power systems and equipment in the later period.
references
[1]. Ren Zhicheng Zhou Zhong. Principles and Application Guide of Digital Measurement of Electric Power Measurement [M]. Beijing. China Electric Power Press. 2007. 4
[2]. Zhou Zhong. Application of power meter in electric energy metering of large public buildings [J]. Modern Building Electric 2010. 6
About the author: Chen Wei (1989-), female, Jiangsu Ankerui Electric Manufacturing Co., Ltd., technical engineer, the main research direction is intelligent power monitoring and power management system. Technical exchange fax mobile phone QQ home page: http:// Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn