Abstract: Introduce the renovation project of Nandan Road No. 1, using integrated protection devices, multi-function instruments, transformer temperature controllers, and DC screens to collect various electrical parameters and status signals at the power distribution site. The system adopts on-site networking on site. After networking, it communicates through the field bus and spreads to the background. The real-time monitoring and management of the electricity used by the substation substation distribution circuit is realized through the Ankerui power monitoring system. Keywords: Nandan Road No. 1 renovation project; 10KV transformer substation; integrated protection device; multi-function instrument; Acrel-2000; power monitoring system. 0 Overview Nandan Road No. 1 Office Building Reconstruction Project (Shanghai Henggao Real Estate Development Co., Ltd.) is located at the intersection of Nandan Road and Caoxi North Road, Xuhui District, Shanghai, China. The total construction area of ​​the project is 12,218 square meters, including above-ground buildings The area is 10,812㎡ and the underground construction area is 1,081㎡. The project has a total of two 10kV incoming lines and two 10kV outgoing loops; 10kV and 0.4kV substation substation comprehensive protection, multi-function instruments, temperature controllers, DC screens and other equipment are connected to the power monitoring system by RS485 bus network. The system host is installed in the duty room of the substation. Power Hacksaw,Junior Hacksaw,Electric Hacksaw,Mini Hacksaw ZHOUSHAN CHUNLEI HACKSAW CO.,LTD , https://www.bailei.com
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 Surveillance System Engineering" GB50052 "Code for Design of Power Supply and Distribution System" GB50054 "Code for Design of Low Voltage Distribution "IEC 61587" Mechanical Structure Series of Electronic Equipment "GB14285" Technical Regulations for Relay Protection and Safety Automatic Devices "GB / 3047.1" Basic Dimensions of Panels, Racks and Cabinets "GB / T17626.2" Electrostatic Discharge Test and Measurement Technology Electrostatic Discharge Immunity test DL / T720 "General technical conditions for relay protection cabinets and screens in power systems" DL / T 698.1-2009 "Part 1: General rules" DL / T 698.2-2010 "Part 2: Technical specifications of the master station" DL / T 698.31-2010 "Part 3.1: Technical Specifications for Electrical Energy Information Acquisition Terminals-General Requirements" DL / T 698.35-2010 "Part 3-5: Technical Specifications for Electrical Energy Information Acquisition Terminals-Special Requirements for Low Voltage Central Meter Reading Terminals" DL / T 698.41-2010 "Part 4-1: Communication Protocol-Communication between the Master Station and the Energy Information Collection Terminal" DL / T 698.42-2010 "Part 4-2: Communication Agreement Discussion-Concentrator Downlink Communication Protocol "DL / T 698.41-2010" Part 4-1: Communication Protocol-Communication between Master Station and Energy Information Collection Terminal "DL / T 698.42-2010" Part 4-2: Communication Protocol-Centralization Device Downlink Communication Protocol 2 System monitoring system mainly implements power safety monitoring and management of the transformation and distribution of Nandan Road No. 1 transformation project. The monitoring range is 2 comprehensive protection devices and 87 multi-function meters. The integrated protection device and multi-function instrument are connected to the data collector in the substation through the 485 bus, and then upload the data to the host of the substation's duty room through the network cable, so as to realize the data communication between the instrument on the bus and the monitoring host on the monitoring host. As shown in the following figure: station control management layer, network communication layer and field device layer. 
System network topology Figure 1) Station control management station control management layer is a direct window for human-computer interaction for the management personnel of power monitoring system. Mainly refers to the industrial computer, display, UPS, etc. placed in the duty room. 2) Network communication layer The communication layer is mainly composed of collector and bus network. The main function of the collector is to monitor on-site intelligent instruments, integrated protection devices, transformer temperature controllers, and DC screens; the main function of the bus network is to realize data interaction, so that the distribution system management is centralized, informationized, and intelligent, which greatly improves The safety, reliability and stability of the power distribution system have achieved the goal of unattended operation. 3) Field equipment layer The field equipment layer is a data acquisition terminal, which is mainly composed of comprehensive protection devices and multi-function instruments. It is connected to the communication server through the shielded twisted pair RS485 interface and using the MODBUS communication protocol bus type connection. The monitoring room of the electrical room is networked to realize remote monitoring. Smart instrument field connection indicates that the field instruments are connected in hand by shielded twisted pair (RVVSP2 * 1.0). The number of smart instruments connected to each bus is about 25, and then upload the data to the serial server, and then upload the data to Local monitoring terminal. The specific connection diagram is as follows: 
3 System functions and features The system uses a full Chinese interface, which is simple and convenient to operate; stable and reliable operation; the system has a system diagram display, simulation diagram display and network structure diagram display; the system provides a friendly human-computer interaction interface, all operations are available It is performed on the interface and has a remote display function. Login interface Acrel-2000 power monitoring system is set up to ensure the safe and stable operation of the system, and set up user rights management function. Unauthorized operations (such as distribution circuit name modification, etc.) can be prevented through user authority management. You can define the login name, password, and operation authority of users at 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 given different operation rights, including entering operation, exiting operation, remote control operation, report management, system configuration, User management, etc. The system administrator is the highest level user, and the higher level user can add and delete the next level user. Distribution monitoring interface Ankerui Acrel-2000 power monitoring system has a friendly man-machine interface, which can visually display the operating status of distribution lines in the form of a distribution graph, and monitor the voltage, current, power, power factor, and energy of each loop in real time Electrical parameter information, dynamically monitor the on and off status of each distribution circuit breaker, disconnector, ground knife, etc., as well as related faults, alarms and other signals. Main functions: One graph shows the corresponding circuit name, current, voltage, total active power, total power factor, circuit breaker, ground knife, isolating switch and other on-off status of each circuit, spring energy storage status, handcart position status. 
Distribution monitoring selection interface 
Low-voltage interface detailed electrical parameter query In a power distribution diagram, 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 view the 24-hour phase current trend curve and 7-day phase current trend curve. Communication status Acrel-2000 power monitoring system supports real-time monitoring of the communication status of each device connected to the system, which can completely display the network structure of the entire system; online diagnosis of device communication status, automatic display on the interface when network abnormalities occur Faulty equipment or component and its faulty part. 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 maintain the abnormal devices in time to ensure the stable operation of the system. Main function: with complete system communication topology structure diagram, real-time display device communication status, red status indicates that the corresponding device communication is normal, green status indicates that the device communication is abnormal. The system host and the serial port server / communication management machine are marked with equipment assigned IP addresses, and the equipment address and equipment loop number are marked beside each equipment. 
Communication status chart, electrical parameter report, Acrel-Acrel-2000 power monitoring system has the storage and management functions of real-time power parameters and historical power parameters, all real-time collected data, sequential event records, etc. can be saved to the database, in the query interface can Customize the parameters that need to be queried, specify the time, or choose to query the recently updated record data, etc., and display them through the report. Main function: Query the operating parameters of each loop or equipment at a specified time. The electrical parameter information displayed in the report should include: each 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 PDF format files can also be exported according to user requirements. 
Electric energy report The Acrel-2000 power monitoring system supports the integrity of the quantity system with a rich report body. The system has the function of periodic meter reading and summary statistics. Users can freely query the power consumption of each 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 node and the power consumption of each branch circuit. This function makes the power consumption visible and transparent, and can be analyzed and traced when the power consumption error is too large to maintain the accuracy of the measurement system. Main function: Time selection box with start time and end time. After selecting the time period you want to query, click the query button to query the power consumption of all distribution circuits within the scope of the system project. The report can be exported and saved in the form of Excel through the export button, and the report can be printed through the print button. 
Alarm and event real-time alarm The real-time alarm window monitors the remote measurements collected by the system. The alarm window will automatically open when the system is running, and it will remain hidden in the background. When the current or voltage exceeds the limit and the alarm limit is touched, the "corresponding real-time alarm" window will automatically pop up and display the specific alarm information in red font: circuit name, over-limit electrical parameter, alarm value, etc. Historical alarms By adjusting the start time and end time, you can query the system alarm information in any past time period, including telemetry alarms and remote signal alarms, as well as specific alarm time, alarm type, and alarm content. 4 Conclusion In the application of current distribution facilities, the power distribution safety of the substation is very important. The application of the Ankerui Acrel-2000 power monitoring system introduced in the reconstruction project of Nandan Road No. 1 in this article can achieve The real-time monitoring of the power supply of the distribution circuit of the power station can not only display the power consumption of the circuit, but also have network communication functions. It 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, real-time display of the operating status of each distribution circuit in the substation, and a pop-up alarm dialog box, voice prompt, SMS alarm light for opening and closing, and load overrun, and generates various energy reports , Analysis curves, graphics, etc., to facilitate remote meter reading and analysis, research of electrical energy, the system is safe, reliable, stable, and provides a true and reliable basis for solving electricity problems.
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