Anke Ruishi Qingqing
Jiangsu Ankerui Electric Manufacturing Co., Ltd. Jiangyin, Jiangsu 214405, China
Abstract: This paper introduces the commercial complex of the urban hub of the transportation hub of Renmin South Road in Kunshan City. It uses integrated protection devices, multi-function meters, transformer temperature controllers 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 Ankerui power monitoring system, the real-time monitoring and management of the power distribution of the substation's power distribution circuit is realized.
Key words: Kunshan City, People's South Road, transportation hub, urban complex, commercial center, 10KV substation; comprehensive protection device; Acrel-2000; power monitoring system.
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0, overview
The project is the first urban complex project in Kunshan City. The project covers an area of ​​51,775 square meters, with a total floor area of ​​155,325 square meters and a total construction area of ​​221,325 square meters.
The project has a total of two 10kV incoming lines, ten 10kV outgoing circuits; a total of 10kV/0.4kV power distribution rooms, T1 and T2 transformers installed in the 1# transformer room, and T3 and T4 transformers installed in the 2# variant. In the electric room, the T5 and T6 transformers are installed in the 3# transformer room, the T7 and T8 transformers are installed in the 4# transformer room, and the T9 and T10 transformers are installed in the freezer room. 10kV and 0.4kV transformer substation comprehensive protection, multi-function instrument, temperature controller, DC screen and other equipment use RS485 bus network to access the power monitoring system, the system host is installed in the 10kV substation duty room.
1. Technical standards
The countries and industries cited in this technical specification are marked as follows:
ISO/IEC11801 "International Integrated Wiring Standards"
GB/50198 "Technical Specifications for Monitoring System Engineering"
GB50052 "Design Specification for Power Supply and Distribution System"
GB50054 "Design Specification for Low Voltage Distribution"
IEC 61587 "Electrical Equipment Mechanical Structure Series"
GB14285 "Technical Regulations for Relay Protection and Safety Automatic Devices"
GB/3047.1 "Basic Size Series of Panels, Racks and Cabinets"
GB/T17626.2 "Electromagnetic compatibility test and measurement technology electrostatic discharge immunity test"
DL/T720 "Power System Relay Protection Cabinet, Screen General Technical Conditions"
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 "Section 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 Protocol - 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 Protocol - Concentrator Downlink Communication Protocol"
2, system solution
The monitoring system mainly realizes the monitoring and management of the electricity safety of the substation transformers in the commercial center of the transportation hub city of the People's South Road in Kunshan City. The monitoring scope is 10KV commercial opening and closing: 12 ACR220ELH instruments, 1 DC screen; 10KV commercial 1 station: 2 ACR220ELH instruments, 2 transformer temperature controllers, 82 PZ80L-E4/KC instruments, ACR230ELH/K instruments 2 blocks, 1 DC screen; 10KV commercial station 2: ACR220ELH instrument 2, transformer temperature controller 2, PZ80L-E4/KC instrument 66, ACR230ELH/K instrument 2, DC screen 1; 10KV commercial 3 Station: ACR220ELH instrument 2, transformer temperature controller 2, PZ80L-E4/KC instrument 84, ACR230ELH/K instrument 2, DC screen 1; 10KV commercial station 4: transformer temperature controller 2, PZ80L -E4/KC instrument 74, ACR230ELH/K instrument 2; 10KV commercial refrigeration station: ACR220ELH instrument 2, transformer temperature controller 2, PZ80L-E4/KC instrument 44, ACR230ELH/K instrument 2, DC screen 1 set. The integrated protection device, the transformer temperature controller, the multi-function meter, and the DC screen are connected to the data collector in the substation through the 485 bus, and then the data is uploaded to the substitute room of the substation through the optical fiber and the network cable, thereby implementing the bus on the monitoring host. The data connection between the upper instrument and 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 collector and a bus network. The main function of the collector is to monitor the on-site intelligent instrument, integrated protection device, transformer temperature controller and DC screen; the main function of the bus network is to realize data interaction, which makes the distribution system management centralized, informationized and intelligent, greatly improved. The safety, reliability and stability of the power distribution system have truly achieved unattended purposes.
3) Field device layer
The field device layer is a data acquisition terminal, which is mainly composed of a transformer temperature controller, an integrated protection device, a multi-function meter, and a DC screen. The shielded twisted pair RS485 interface is used to connect to the communication server by using the MODBUS communication protocol bus type connection, and the communication server is used. Arrival at the distribution room monitoring host for networking to achieve 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:
3, 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, current, voltage, total active power, total power factor, circuit breaker, ground knife, isolation switch and other combined position status, spring energy storage status and hand truck position status.
Power distribution monitoring selection interface
1# substation interface
1# substation incoming line harmonic instrument detailed parameters
Detailed electrical parameter query
In the power distribution map, click the mouse to view the detailed electrical parameters of the loop, including three-phase current, three-phase voltage, three-phase total active power, total reactive power, total power factor, positive active energy, and can be viewed. 24-hour phase current trend curve and 7-day phase current trend curve.
Distribution circuit details
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
Current limit setting
A current limit setting is designed for each circuit of the power distribution system. It is convenient for the distribution and maintenance personnel to change the set value of the electric current according to the on-site electricity demand. When the current exceeds the limit, the power supply of the loop is controlled in time to ensure the reliability of the power supply and provide protection for the user's energy use rights.
Power curve
In the distribution curve, the mouse selects the corresponding loop and can query the power data within 24 hours and the past 7 days.
The power curve helps users perform power quality analysis and fault analysis.
Power curve interface
Transformer temperature
Click on “Transformer Temperature†on the corresponding circuit of the power distribution system diagram.
You can view all transformer operating temperature status and timed fan time.
Transformer temperature interface
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.
4 Conclusion
In today's power distribution facilities, the distribution security of the substation is of vital importance. The application of the Acry-Acrel-2000 power monitoring system described in this paper is in the commercial center of the transportation hub city complex of Renmin South Road, Kunshan City. It can realize real-time monitoring of the power supply and distribution circuit of the substation, not only can display the power consumption of the circuit, but also has the network communication function, and can form a power monitoring system with the serial port server and 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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