Xu Shuang
Ankerui Electric Co., Ltd. Shanghai Jiading
ã€Abstract】 This paper introduces the design, system configuration and system functions of the Ankerui Electric Co., Ltd. distribution monitoring system in the airport project. Acrel-2000 configuration software can realize the system integration of field devices, data collection, transmission and storage, so as to realize the remote measurement and remote control functions of the airport's electricity consumption data, switch quantity. The system realizes remote refinement and real-time data collection, avoids the deviation of manual data collection, improves the quality of power supply and management level, and has the advantages of conciseness, practicality, and low investment.
[Keywords]: Chengdu Shuangliu Airport; configuration software; airport distribution; power quality;
introduction
The Chengdu Shuangliu International Airport is the busiest civil hub airport in the Midwest, the most important air passenger and cargo distribution center in the southwest, the Southwest Air Traffic Control Bureau resident, the only transit airport to the Changdu Bangda Airport and the Linzhi Milin Airport, and the southwest branch of Air China. The base airport of the company, Sichuan Airlines, Chengdu Airlines, Shenzhen Airlines, and Eastern Airlines Sichuan Branch. The object of this power distribution transformation project is the staff style center in Chengdu Shuangliu Airport. The staff stylistic center is very important for the healthy and stable development of an airport. Its main performance is in the following aspects: The staff stylistic center is the corporate cultural position that employees can see, touch, and use; staff style The center is the bridge between the employees and the enterprise. The staff style center is the training ground for employees to improve their professional abilities. The staff style center is the staff's gym. In view of the importance of the staff stylistic center, in order to ensure the normal operation of the entire stylistic center for power distribution, the stylistic center's electrical equipment is functioning normally, the distribution system of the stylistic center is managed intelligently, and the entire distribution system is implemented in real time. Monitoring is an essential condition.
Project Introduction
The high-voltage power distribution system of the Shuangliu Airport Staff Style Center has a power supply of 10 kV for the line and 5 lines of 10 kV for the line. The system diagram is as follows:
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In view of the importance of the actual use of the project, the safety, reliability and operational stability of on-site power supply and distribution must reach a certain height. The on-site power supply and distribution system of this project uses a 10kV single-supply power supply, and there is no backup power supply. Therefore, it is particularly important to solve the obstacles encountered in the power supply and distribution process in time before the problem occurs in this set of power distribution system. Accor Electric Co., Ltd., with its mature and reliable technical force in power metering and smart grid user-end system integration solutions, took over the power monitoring system in the Chengdu Shuangliu International Airport Worker Sports Center Transformation and Distribution Project in 2012. project.
User's requirements for the system
First of all, it is necessary to realize the remote measurement of electric parameters such as current, voltage, and power, and the over-limit alarm of electric parameters, the alarm of switching quantity, and the alarm of sound and light signals when alarming; secondly, it is necessary to have historical data inquiries, real-time current trend trends and historical inquiries. Function, event recording, system operation abnormality monitoring, fault alarm and operation record; Finally, it is necessary to have report query and printing; system load real-time, history curve, and user rights management main functions;
System Design Reference Standard
GB/T 13729-2002 Telecontrol Terminal Equipment
Q/GDW 213-2008 "Regulations for factory acceptance of substation computer monitoring systems"
Q/GDW 214-2008 "Regulations for Site Acceptance Management of Substation Computer Monitoring System"
GB/T 2887-2011 "General Specification for Computer Sites"
DL/T 5430-2009 Design Specification for Remote Monitoring Center of Unattended Substation
GB/T 2887-2011 "General Specification for Computer Sites"
DL/T 1023-2006 "Substation Simulator Technical Specifications"
DL/T 5002-2005 "Regional Power Grid Dispatch Automation Design Technical Regulations"
DL/T 634.5101-2002 "Remote-moving Equipment and Systems Part 5-101: Standards for Remote Telemetry Tasks for Transmission Protocols"
DL/T 634.5104-2009 "IEC 60870-5-101 Network Access Using Standard Protocol Sets for Transmission Protocols for Telecontrol Equipment and Systems Part 5-104"
DL/T516-2006 "Operation Regulations for Power Dispatching Automation System"
DL/T 5391-2007 "Technical Regulations for Communication Design of Power Systems"
DL/T 1101-2009 "Acceptance Specifications for 35kV ~ 110kV Substation Automation System"
DL/T645-2007 Multifunction Meter Communication Protocol
Front-end device networking
The project monitoring object is: 10kV medium-voltage microcomputer protection device 6, a DC screen, the installation location of the equipment are in a 10kV distribution room, the specific model for the high-voltage comprehensive protection RCL311, RCX311, RCT313; high-voltage power meter RST311; DC screen: RT200A. The front-end devices all use the standard Modbus-RTU communication protocol that complies with the power industry.
This project belongs to the transformation project. There are two methods for the front-end equipment networking. The first is to use a shielded twisted pair cable to hand-wire the field devices, and then connect the bus directly to the monitoring background. The second method is The front end is connected to the device using a shielded twisted pair cable, and then the wireless communication module is connected to the monitoring background. Comparison of the advantages and disadvantages of the two methods: The first method is cumbersome to construct, and the direction of the bus needs to go through the bridge or go through the trench. The data transmission is stable and reliable and the packet loss rate is low. The second method is simple in construction and avoids the work of bus laying. However, data transmission has poor real-time performance and high packet loss rate. Taking into account the higher requirements for the real-time, stability, and reliability of data transmission in this project, the first scheme was adopted for networking. Shielded twisted pair cable RVSP2*1.0 is used for the communication cable. The direction of the bus must be far away from the interference source to avoid contact with the strong electrical signal. The shielded twisted pair shield layer is reliably grounded in the communication collection box. During construction, all lines shall be laid manually and shall not be hard-wired to avoid damaging the cables due to mechanical operations. The cable must be marked with a standard code. Pay special attention to the handling of the turning position of the cable (keep a certain turning radius) to avoid causing the copper cable to be affected. Loss or breakage affects the stability of data transmission.
Software and Features
Acrel's Acrel-2000 power monitoring system utilizes computers, communication equipment, and metering protection devices to provide a basic platform for real-time data acquisition, switch state detection, and remote control of the system. The system can provide enterprises with "monitoring integration" of the overall solution, including real-time historical database AcrSpace, industrial automation configuration software AcrControl, power automation software AcrPower, "soft" control strategy software AcrStrategy, communication gateway server ANet, OPC products , Web portal tools, etc., can be widely used in enterprise information, DCS systems, PLC systems, SCADA systems.
Functional Features
1 System Operation Monitoring and Control
In the monitoring interface, the network diagram of the entire power monitoring system is displayed, and the real-time operating parameters and the equipment running status on each main wiring diagram are dynamically refreshed, and the remote control function is supported. The system screen can be configured according to actual needs.
2 Electricity trend curve analysis
The system provides real-time curve and historical trend two kinds of curve analysis interface, by calling the relevant circuit real-time curve interface to analyze the current operating load status of the circuit. By invoking the real-time curve of a given circuit, the signal fluctuation caused by the electrical equipment of the circuit can be analyzed.
3 Alarm and Event Management
The system can be set to trigger an alarm when the measured value of the power parameter is exceeded and the device status changes. When the system alarms, information voice prompts can be provided to automatically pop up the alarm screen or trigger necessary operations. At the same time, the alarm information can be notified to relevant personnel through email, SMS, and other methods.
4 historical data management
The system completes historical data management based on a real-time database. All real-time sampling data and sequential event records can be saved to the historical database. In the monitoring screen, the parameters to be queried, the time period of the query, or the number of records newly selected by the query can be customized, displayed and drawn as a graph.
Practical case function display
The main interface of the system simulates and displays the actual situation of the site of 10kV. The electrical parameter data is refreshed in real time, and the switch signal is changed in real time (in the figure, the red display is the closing and the green is the opening), and the remote control function is supported.
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Remote meter reading
The system can display all the collected data in real time and store it in the database. Therefore, all the real-time and historical electrical parameter data of each loop can be manually checked in the form of a report. The form of the report is flexible and changeable. This case is presented to users in the form of a table, which is easy to print and save.
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Energy report
The active power data collected by the system is automatically generated daily report, monthly report, and annual report according to the name of the circuit, and has a report printing function. It can also query and print the power consumption in a certain period of a certain loop. , And these reports can also be exported in Excel format.
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Current trend curve
For important loops, not only current can be displayed and monitored in real time, but also trend curves can be created based on saved historical data, real-time and historical trend can be viewed, power load capacity can be predicted, and power failure can be inquired to ensure power load. Safe operation.
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Alarm information and event record query
When an alarm condition occurs on the site, an alarm information window pops up in the background prompting the user to perform relevant operations in a timely manner to avoid accidents. And it has automatic event logging for all operations. Alarm records are mainly used to view historical alarm information; help users to inquire and recall accidents; support history query, print and other functions.
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Conclusion
With the development of intelligent buildings and the widespread application of electricity, the intelligent integrated management of the distribution system of intelligent buildings has become an inevitable trend for the construction of state office buildings and the intelligent construction of large-scale public buildings. This article describes the power based on Acrel-2000. The monitoring and power management system can not only display the power running status and power usage status in real time, but also analyze and process the data, display it in a user-applicable manner, meet the user's needs, and realize the analysis and processing of the collected data. All kinds of energy reports, analysis curves, graphics, etc., greatly facilitate the user's use, convenient for real-time monitoring of power distribution systems and remote meter reading and analysis of electrical energy, to provide reference for energy-saving technologies of intelligent buildings.
references
[2]. Ren Zhicheng, Zhou Zhong. Principles and Application Guides of Digital Meters for Electric Power Measurement [M]. Beijing. China Electric Power Press, 2007. 4
About the Author:
Xu Shuang, female, undergraduate, Ankerui Electric Co., Ltd., the main research direction for the smart grid power distribution, Email: Mobile QQ
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