Anke Ruishi Qingqing
Jiangsu Ankerui Electric Manufacturing Co., Ltd. Jiangyin, Jiangsu 214405, China
Abstract: Introduce the Changsha Wanda Plaza renovation project, using integrated protection devices and DC screens to collect various electrical parameters and status signals from the power distribution site. The system adopts the on-site local networking mode. After networking, it communicates through the fieldbus and travels to the background. Through the Acre-2000 power monitoring system, the real-time monitoring and management of the substation's power distribution circuit is realized.
Key words: Changsha Wanda Plaza renovation project; 10KV transformer substation; integrated protection device; Ankerui; Acrel-2000; power monitoring system.
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0, overview
Changsha Kaifu Wanda Plaza Project is located in Kaifu District, Changsha City, Hunan Province, adjacent to Xichang Street in the east, Xiangjiang Avenue in the west, Wuyi Avenue in the south and Chaozong Street in the north. The project construction land is about 121,800 square meters, and the total construction area is about 1 million square meters. Changsha Kaifu Wanda Plaza is a first-line urban complex project in Linjiang. Its format includes large-scale commercial center, commercial pedestrian street, high-end wine dian, business wine dian, office building and hardcover mansion.
The project will transform its substation, install power monitoring system, complete real-time monitoring of its substation, and upload the data to Wanda Plaza Huiyun platform. There are 5 10KV transformer substations in this project. Including 1# central transformer substation, department store substation, Jinjie transformer substation, 1# opening and closing station, 2# opening and closing station, integrated protection device in variable distribution station, DC screen and other equipment adopt RS485 bus group The network access is adapted to the data collector in the power station, and then to the power monitoring host of the substation duty room.
1, demand analysis
Power monitoring systems need to implement centralized data management, analysis and processing. The software features are as follows:
Monitoring information such as voltage, current, power, power factor and frequency is refreshed in real time and displayed visually and dynamically in a single graph. Each loop sub-screen displays information such as the electrical parameters and circuit names of the loop.
The power collection function of each loop can generate power consumption reports that meet customer management requirements during the time period.
Real-time communication status display for each loop meter.
Multi-user rights management for easy hierarchical operation.
The data is forwarded to the Huiyun platform.
This technical condition applies to the transformer and distribution room of the Changsha Wanda Plaza renovation project. 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.
2, technical standards
The countries and industries cited in this technical specification are marked as follows:
ISO/IEC11801 "International Integrated Cabling Standards"
GB/50198 "Technical Specifications for Monitoring System Engineering"
GB50054-2011 "Design Specification for Low Voltage Distribution"
IEC 61587 "Electrical Equipment Mechanical Structure Series"
DL/T448-2000 "Technical Management Regulations for Electric Energy Metering Devices"
DL/T 698.1-2009 Part 1: General
DL/T 698.2-2010 Part 2: Technical Specifications for Master Stations
DL/T 698.31-2010 Part 3.1: Technical Specifications for Power Information Collection Terminals - General Requirements
DL/T 698.35-2010 Part 3-5: Technical specification for power information collection terminal - Particular requirements for low-voltage centralized meter reading terminal
DL/T 698.41-2010 Part 4-1: Communication Protocol - Communication between the primary station and the energy information collection terminal
DL/T 698.42-2010 Part 4-2: Communication Protocols - Concentrator Downlink Communication Protocol
DL/T 698.41-2010 Part 4-1: Communication Protocol - Communication between the primary station and the energy information collection terminal
DL/T 698.42-2010 Part 4-2: Communication Protocols - Concentrator Downlink Communication Protocol
3, system solution
The monitoring system mainly realizes the monitoring and management of power consumption for the transformation and distribution of the Changsha Wanda Plaza renovation project. The monitoring scope is the integrated protection device and DC screen of the substation. The system is connected to 14 sets of comprehensive protection of 1# opening and closing station, 1 DC screen; 10 sets of comprehensive protection for 2# opening and closing; 11 sets of comprehensive protection for department store substation, 1 DC screen; 1# center with 11 comprehensive insurance Jin Street is equipped with 8 sets of comprehensive protection and 1 DC screen. The 485 bus directly accesses the data collector in the substation, and uploads data to the main office of the substation room through the network cable or optical fiber, thereby implementing data communication between the instrument on the bus and the monitoring host on the monitoring host. As shown in the figure below: station management layer, network communication layer and field device layer.
System network topology
1) Station management
The management of the station control management system for the power monitoring system is a direct window for human-computer interaction. In the main refers to the industrial computer, display, UPS, etc. placed in the duty room.
2) Network communication layer
The communication layer is mainly composed of a serial server and a bus network. The main function of the serial port server is to monitor the on-site integrated protection device and DC screen; the main function of the bus network is to realize data interaction, make the distribution system management centralized, informative and intelligent, and greatly improve the safety and reliability of the power distribution system. Sex and stability have truly achieved unattended purposes.
3) Field device layer
The field device layer is a data acquisition terminal, which is mainly composed of a comprehensive protection device and a DC screen. The instrument is connected to the communication server through a shielded twisted pair RS485 interface and a MODBUS communication protocol bus type connection, and the communication server arrives at the power distribution room monitoring host. Networking for remote monitoring.
Smart meter field connection
The field instruments are connected by hand-shielded through shielded twisted pair (RVVSP2*1.0). The number of smart meters connected to each bus is about 25, and then the data is uploaded to the serial server, and the data is uploaded to the local monitoring terminal. The specific connection diagram is as follows:
4, system function
Features
The system adopts full Chinese interface, and the operation is simple and convenient; the operation is stable and reliable; the system has a system diagram display, simulation diagram display and network structure diagram display; the system provides a friendly human-computer interaction interface, and all operations can be performed on the interface. And has a remote display function.
login interface
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, maintenance, and management.
Main functions: The user's level is divided into four levels: operator, squad leader, engineer, and system administrator. Each level can be assigned different operation rights, including entering operation, exiting operation, remote operation, report management, system configuration, User management, etc. The system administrator is the most gao level user, and the upper level user can add and delete the next level user.
Power distribution monitoring interface
Ankerui's Acrel-2000 power monitoring system has a friendly man-machine interface. It can visually display the operating status of the distribution line in the form of a power distribution map, and monitor the voltage, current, power, power factor, and electric energy parameters of each loop in real time. Dynamically monitor the status of each power distribution circuit breaker, disconnector, ground knife, etc., as well as related faults, alarms and other signals.
Main function: One graph shows the corresponding circuit name, three-phase current, three-phase line voltage, total active power, total power factor, circuit breaker, ground knife, isolation switch, etc., spring energy storage state, handcart Location status.
Power distribution monitoring function
Communication status
Acrylic's Acrel-2000 power monitoring system supports real-time monitoring of the communication status of each device in the access system, and can completely display the entire system network structure; it can diagnose the communication status of the device online, and automatically display the faulty device on the interface when a network abnormality occurs. Or component and its fault location. Therefore, it is convenient for the operation and maintenance personnel to grasp the communication status of each device in the field in real time, and timely maintain the abnormal equipment to ensure the stable operation of the system.
Main function: It has a complete system communication topology diagram, real-time display device communication status, red status indicates that the corresponding device communication is normal, and green status indicates that the device communication is abnormal. The system host and the serial port server/communication management machine indicate that the device assigns an IP address, and the device address and device circuit number are identified next to each device.
Communication status map
Electrical parameter report
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 database, and the parameters that need to be queried can be customized in the query interface. , specify the time or choose to query the most recently updated record data, etc., and display it in the form of a report.
Main function: query the running parameters of each loop or equipment at the specified time. The electric parameter information in the report should include: phase current, three-phase voltage, total power factor, total active power, total reactive power, positive active energy, etc. The electrical parameter report also supports exporting Excel format files, and can also export PDF files according to user requirements.
Energy report
The Acrylic Acrel-2000 Power Monitoring System enriches the integrity of the reporting system. The system has the function of timed meter reading summary statistics. 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 incoming line of the node and the power consumption of each branch circuit. This function makes the electricity use visible and transparent, and can analyze and trace the electricity when the power error is too large, and maintain the correctness of the measurement system.
Main function: The time selection box with start time and end time. After selecting the time period you want to query, you can query the power consumption of all distribution circuits in the system project range by clicking the query button. The report can be exported and saved in Excel by the Export button, and the report can be printed by the Print button.
Energy report function
DC screen display
Supervise the real-time operation of the DC screen in the power distribution system to ensure the reliability of the DC screen power supply.
DC screen
Alarms and events
Real-time alarm
The real-time alarm window monitors the telemetry collected by the system. The alarm window opens automatically when the system is running and remains hidden in the background.
When there is current or voltage limit and the alarm limit is reached, the “Real-time real-time alarm†window will pop up automatically, and the specific alarm information will be displayed in red font: loop name, over-limit electric parameter, alarm value, etc.
Historical alarm
By adjusting the start time and end time, you can query the system alarm information in any past time period, including telemetry alarm and remote alarm, including the specific alarm time, alarm type, alarm content and so on.
5, the conclusion
In today's power distribution facilities, the distribution security of the substation is of vital importance. The application of the Ankerui Power Monitoring System in Changsha Wanda Plaza Reconstruction Project can be realized for the substation supply and distribution circuit. The real-time monitoring of electricity not only can display the power consumption of the loop, but also has the network communication function, and can form a power monitoring system with a serial port server and a computer. The system realizes the analysis and processing of the collected data, displays the running status of each distribution circuit in the substation in real time, and has a pop-up alarm dialog box, voice prompt, SMS alarm light for the closing and closing of the load, and generates various energy reports. Analyze curves, graphs, etc., to facilitate remote meter reading and analysis and research of electric energy. The system is safe, reliable and stable, and provides a real and reliable basis for solving electricity problems.
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 Zhongbian. Smart grid customer power monitoring and power management system product selection and solution [M]. Beijing. Mechanical Industry Press. 2011.10
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