Xu Shuang
Ankerui Electric Co., Ltd., Jiading, Shanghai 201801, China;
Abstract: Introducing the 10KV substation renovation project of Sinopec Nanguang (Shanghai) Industrial Co., Ltd., using integrated protection devices, remote signal units, 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 Acrel-2000 power monitoring system, the real-time monitoring and management of the substation's power distribution circuit is realized.
Key words: Sinopec Nanguang (Shanghai) Industrial Co., Ltd.; transformation; 10KV transformer substation; integrated protection device; Acrel-2000; power monitoring system.
0 Overview
Sinopec Nanguang (Shanghai) Industrial Co., Ltd. is located at No. 135, Fu Texi 1st Road, Shanghai, China (Shanghai) Pilot Free Trade Zone. Its main business scope includes the simple processing of warehousing and export products; real estate development and management within the transferred land; Trade, agency import and export trade and trade consulting; technology consulting services; import and export of goods and technology (excluding distribution and national banned projects); international freight forwarding agents for sea, land and air, cargo distribution, parking garage operations, no ships Carrier business operations.
The project undertakes the construction of two power distribution monitoring systems for its substation. The 1# transformer substation has a total of 2 10KV incoming lines, and 2 sets of 1250KVA transformers supply power to the building; 3# transformer substations have a total of 1 The road 10KV enters the line, and the building is powered by a 1250KVA transformer. The integrated protection device, transformer temperature controller and DC screen in the transformer station are connected to the data collector in the transformer station by RS485 bus network. The Category 5 line transfers data to the back office of the duty room.
1 Demand analysis
Power monitoring systems need to implement centralized data management, analysis and processing. The software features are as follows:
The monitoring information such as high voltage, current, power, power factor, power consumption, and switching amount are 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.
A trend curve is drawn for the current of each loop to facilitate analysis of the distribution operation conditions 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.
This technical condition applies to the transformer and power distribution room of the 10KV substation renovation project of Sinopec Nanguang (Shanghai) Industrial Co., Ltd. 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 plan
The monitoring system mainly realizes the monitoring and management of the electricity safety of the 10KV substation renovation project of Sinopec Nanguang (Shanghai) Industrial Co., Ltd. The monitoring scope is 2 sets of comprehensive protection devices of 1# transformer and power distribution station, 1 set of ARTU remote signal unit, 2 sets of transformer temperature controller, 1 set of DC screen; 1 set of comprehensive protection device of 3# transformer substation, ARTU remote 1 letter unit, 1 transformer temperature controller, 1 DC screen. The integrated protection device, ARTU remote signal unit, transformer temperature controller and DC screen are connected to the data collector in the substation through the 485 bus, and then the data is uploaded to the substation room by the super five network cable, so as to be on the monitoring host. Realize the data connection between the instrument on the bus 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 and integrated protection device; 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 distribution system. Sex and stability have truly achieved unattended purposes.
3) Field device layer
The field equipment layer is a data acquisition terminal, which is mainly composed of a transformer temperature controller, a comprehensive protection device, a DC screen, and an ARTU remote signal unit. The shielded twisted pair RS485 interface is used to connect to the communication server by using the MODBUS communication protocol bus type. The server arrives at the power distribution monitoring host to perform networking and 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 functions
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 a level user, and the upper level user can add and delete the next level of users.
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 function
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
DC screen 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.
Current limit setting
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 Conclusion
In today's distribution facilities, the distribution safety of the substation is of vital importance. The application of the Acrel-2000 power monitoring system introduced in the 10KV substation renovation project of Sinopec Nanguang (Shanghai) Industrial Co., Ltd. can be realized. The real-time monitoring of the power supply and distribution circuit of the substation can not only display the power consumption of the circuit, but also have 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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