Introduce the 35/10KV substation of Shanghai University of Finance and Economics, using intelligent power meters to collect various electrical parameters and switching signals from the power distribution site. The system adopts the on-site local networking mode. After networking, it communicates to the background through the fieldbus. Through the Acrel-2000 power monitoring and power management system, the real-time monitoring and management of the power distribution circuit of the substation is realized.
Ankerui Electric Co., Ltd., Jiading, Shanghai 201801, China;
Abstract: Introduce the 35/10KV substation of Shanghai University of Finance and Economics, using intelligent power meters to collect various electrical parameters and switching signals from the power distribution site. The system adopts the on-site local networking mode. After networking, it communicates to the background through the fieldbus. Through the Acrel-2000 power monitoring and power management system, the real-time monitoring and management of the power distribution circuit of the substation is realized.
Keywords: Shanghai University of Finance and Economics 35/10KV substation; Acrel-2000/3000 type; power monitoring system
The Shanghai University of Finance and Economics campus covers a total area of â€‹â€‹766 acres (37 square meters for full-time students), with one main campus and two sub-campus. Among them, the main campus is a full-time undergraduate student and international student education base, which consists of a group of national, Wuchuan and Wudong campuses. The main campus is located in Yangpu University City, adjacent to Fudan University, Tongji University, Second Military Medical University and other famous universities. The Zhongshan North 1st Road Campus is a high-level talent on-the-job training base.
The new 35KV substation project of Shanghai University of Finance and Economics is located at No. 777, Guoding Road, Shanghai, near the junction of Wuchuan Road, Zhengli Road. The substation supplies electricity to the student residences of the Wuchuan Road campus and its surrounding areas and equipment.
This project is a new power monitoring system for the 35KV substation of Shanghai University of Finance and Economics.
1 Demand analysis
The site is a 35/10KV substation. Power monitoring systems need to implement centralized data management, analysis and processing. The approximate functional requirements of the software 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. The information of each electrical parameter, circuit name, and current limit of the circuit is displayed on each circuit sub-screen.
A trend curve is drawn for the current of each loop power meter to facilitate analysis of the loop distribution operating conditions.
The power metering function of the power meter of each loop power meter can generate the power consumption report that meets the customer management requirements within the time period.
This technical condition applies to the 35/10KV power distribution room low voltage cabinet of Shanghai University of Finance and Economics. 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 system plan
The monitoring system mainly realizes power consumption monitoring and power management of the power distribution system of the 35/10KV substation of Shanghai University of Finance and Economics. The monitoring scope is remote real-time monitoring and power management for the low-voltage incoming cabinets of the substation T1 and T2 transformers, the communication cabinets and the feeder cabinet instruments. The system is connected to the substation 26 long-time electric instrument 10KV multi-function power meter EP301, 4 35kv comprehensive insurance Sepam z82, 12 10KV comprehensive security Sepam S20, 2 high-voltage temperature controller and 1 DC screen, divided into 9 buses, bus Direct access to the acquisition equipment in the substation; the duty room is located in the substation, the bus is directly uploaded to the substation mainframe, so that the data connection between the instrument on the bus and the monitoring host is realized on the monitoring host.
The field topology is shown in the following figure: station management layer, network communication layer and field device layer.
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 connected to the 232 serial port of the background host by the instrument bus via the rear 232/485 converter, so that the data of the intelligent power meter is uploaded to the system background.
The main function of the communication layer is to realize data interaction, which makes the distribution system management centralized, informationized and intelligent, which greatly improves the safety, reliability and stability of the power distribution system, and truly achieves the goal of unattended operation.
3) Field device layer
The field device layer is a data acquisition terminal, which is mainly composed of smart meters. The smart meter is connected to the communication server through the shielded twisted pair RS485 interface, and uses the MODBUS communication protocol bus type connection to reach the communication host through the communication server. Implement remote control.
The low-voltage incoming and feeder loops use multi-function meters that measure all conventional power parameters such as three-phase voltage, current, power factor, frequency, active energy, and reactive energy.
3 system function
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, network structure diagram display and report display; the system provides a friendly human-computer interaction interface, all operations can be performed on the interface, and has a remote display function.
In order to ensure the safe and stable operation of the system, the user rights management function is set. Unauthorized operations (such as power distribution loop name modification, etc.) can be prevented by user rights management. Define the login name, password, and operation authority of users of different levels to provide reliable security for system operation and maintenance management. The user's level is divided into three levels: operator, engineer, and system administrator. Each level can be assigned to different operation rights, including entering operation, exiting operation, and report management. The system administrator is the highest level user, and the higher level user can add and delete the next level of users.
Communication status function description
The real-time display of the communication status of each device in the access system can completely display the entire system network structure, and can diagnose the network communication status of the system online. When a network failure occurs, the fault unit and the fault location can be automatically displayed on the screen. This makes it easy for the system maintenance personnel to grasp the communication status of each device in the field in real time, investigate the cause of the failure, and timely maintain the abnormal equipment to ensure the stable operation of the system.
Power distribution monitoring function description
The above figure shows the power distribution monitoring interface of the system, which displays the three-phase current, three-phase voltage, active power, reactive power and rate factor of each circuit in the power distribution room in real time, realizing local real-time display of remote data. The data processing mainly displays the electrical parameters collected according to the requirements in real time and accurately to the user, reminding the on-duty personnel to timely handle the faults and reduce the accident rate.
Run record function description
This function provides customers with a summary of key data such as real-time and historical current-voltage temperature controllers and provides them in a timely manner.
Electrical parameter report
Electric parameter report function description
Real-time power parameter storage and historical power parameter management functions, all real-time data collected, sequential event records, etc. can be saved to the real-time database. In the monitoring screen, you can customize the parameters that need to be queried, the time period of the query, or select the number of records that have been updated recently, and display them in a report mode. It is easy for the staff to solve the problem by recording the working status of the protection device and recording the fault information to accurately reflect the problems in the system.
Power report function description
In order to realize the supervision of the electricity consumption of each circuit in the building, the system designed the power management report. The system uses the collection of active energy to present the power of each circuit in any period of the system operation, each incoming circuit and The outlet circuit it carries is made in a table, which can be easily inquired and printed, and can help establish an effective energy management assessment system. Through the construction of the system and the establishment of the system, energy consumption is effectively saved.
Current curve function description
A current potential curve is designed for the total incoming line of the distribution system (or the exit of the critical load). It is convenient for distribution and maintenance personnel to keep abreast of the demand of power consumption and the load of power supply system to ensure the reliability of power supply and provide guarantee for the energy use rights of user units. With this function, it is also possible to analyze the growth trend of energy demand, adjust the demand declaration in a timely manner, and reduce the excess payment due to excessive deviation of demand. The current curve helps the user to perform power quality analysis and fault analysis.
Alarms and events
Telemetry real-time alarm function
The system provides remote real-time alarm function, which separately judges the data of telemetry and remote signal collected by the monitoring system, and provides a current or voltage over-limit alarm function.
Telemetry history alarm event query
The system provides query service for system alarm information in any past time period, including telemetry alarm and remote signal alarm. The content is specific alarm time, alarm type, alarm content and so on.
In today's power distribution facilities, the distribution security of the substation is of vital importance. The application of the Acrel-2000 power monitoring system introduced in the 35KV substation of Shanghai University of Finance and Economics can be used for the power distribution circuit of the substation. 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, which provides a real and reliable basis for solving electricity metering problems in schools and has achieved good results.
. Ren Zhicheng Zhou Zhong. Principles and Application Guide of Digital Measurement of Electric Power Measurement [M]. Beijing. China Electric Power Press. 2007. 4
. Zhou Zhongbian. Smart grid customer power monitoring and power management system product selection and solution [M]. Beijing. Mechanical Industry Press. 2011.10
Author brief introduction Yang Junjun, female, undergraduate. Position: Now working for Ankerui Electric Co., Ltd., contact number, mobile phone, QQ
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
T Post & L Stay are made of mild steel,
treatment surface :hot dipped galvanized ,epoxy coated to color RAL6005/RAL7016/RAL9005.
packing onto pallet.
T Post,L Stay Post Epoxy Coated,L Stay Post Triple Protection,L Stay Post
HeBei Fortune Trade Co.,Ltd. , https://www.gardfence.com