Application of Acrel-2000 Power Monitoring System in 201-202

Introduce sixty-two, use integrated protection devices, intelligent power meters, and 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-3000 power monitoring and power management system, the real-time monitoring and management of the power distribution circuit of the substation is realized.
Yang Junjun

Ankerui Electric Co., Ltd. Shanghai Jiading





Overview

China Aircraft Strength Research Institute (623)

China Aircraft Strength Research Institute is affiliated to China Aviation Industry First Group Corporation, number 623. It is the only aircraft strength research center and ground strength verification test base of China Aviation Industry.

The main working direction of the 623 is: to be responsible for the advance research in the field of aircraft structural strength technology, to provide key structural strength technology for the development and modification of new machines; to undertake the ground strength verification test for full-size aircraft structures, representing the new research and retrofit of the country The aircraft gives authoritative strength conclusions before the first flight and provides authoritative test data for aircraft structure life, life extension and reliability assessment.

The project is located at the intersection of Nanweichanghe Road and Jingsan Road, Nantong District, Shanghai. It is a power management system designed for the China Aircraft Strength Research Institute (623) No. 201 full-machine static/fatigue test plant and No. 202 power center.



1, demand analysis

There are four substation rooms on the site, namely 10KV substation, 201 full-machine static/fatigue test plant substation, 202 power center transformer substation and air compressor power distribution station. The power management system needs to implement centralized data management and analysis 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. 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.

Perform a SOE event query on the high voltage part.

Real-time temperature alarm is applied to the transformer part to facilitate real-time understanding of the status of the field transformer.

Multi-user rights management for easy hierarchical operation.

This technical condition applies to the transformer substation room of the 623. 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 solution

The monitoring system mainly realizes power consumption monitoring and power management for the 62 and 23 transformers. The comprehensive protection device of the monitoring range is 10KV transformer room; the comprehensive protection device of the 201-unit full-machine static/fatigue test plant transformer substation, the transformer temperature controller, the low-voltage inlet and outlet line multi-function instrument; the power transmission and distribution of No. 202 power center The transformer temperature controller, the low-voltage input and output line multi-function instrument; the comprehensive protection device of the air compressor power distribution station. The system is connected to the No. 201 full-machine static/fatigue test plant transformer substation 2 integrated protection devices, 62 multi-function meters, 2 transformer temperature controllers are divided into 8 buses, the bus directly accesses the data in the substation The collection box uploads data through the optical fiber to the host room of the 202 transformer room; 10 integrated protection device for 10KV transformer room, power station for power station 202, 46 multi-function meters, 2 transformer temperature controllers, air pressure There are 3 integrated protection devices in the power distribution unit, which are divided into 8 buses. The bus directly connects to the serial port server in the substation, so as to realize the data connection 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 power management system for the station management 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 NPORT5610 serial server, Ethernet device and bus network. The main function of NPORT5610 serial server is to monitor on-site intelligent instrument, integrated protection device, DC screen, transformer temperature controller; the main function of Ethernet equipment and bus network is to realize data interaction, make distribution system management centralized, information and intelligent. It 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 a smart meter, an integrated protection device, a DC screen, and a transformer temperature controller. The smart meter is connected to the communication server through a shielded twisted pair RS485 interface and a MODBUS communication protocol bus type connection. 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 20, and then the data is uploaded to the serial port server NPORT5610, and the data is uploaded to the local monitoring terminal. The specific connection diagram is as follows:







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

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

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.







The monitoring system interface is divided into three parts, the title interface, the power distribution system interface and the menu switching interface.







The current time of the currently logged in user and system is displayed in the title interface.

The system interface displays various parameters corresponding to the current interface.

The buttons arranged on the menu switching interface are the function switching buttons of the system. Different function buttons can enter the corresponding function interface.







Power distribution monitoring interface





Power distribution monitoring function



You can view the distribution and connection of each distribution circuit as well as the main electrical parameters. The main data includes: three-phase current, electrical energy.

When you choose to log in to the system as “Administrator”, you can click the loop name in the system map to modify the loop name directly. After the modification, the system will automatically save it. In the system diagram, the on/off of each loop will be indicated by a red-green switch. Red indicates that the loop is on and green indicates that the loop is open.

Through the “temperature control alarm” button, the interface can display the data collected by the temperature controller in real time.





Temperature controller interface

This interface allows for real-time status of the temperature controller temperature.

Communication status

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. Therefore, the system maintenance personnel can grasp the communication status of each device in the real-time, and timely maintain the abnormal equipment to ensure the stable operation of the system.





Communication status map

The communication status can see the distributed network structure of the entire system, which has network diagnostics. It can monitor the network communication status of the system in real time. When a network failure occurs, the system automatically displays the fault line and specific unit. Red indicates that the communication is normal, and green indicates that the instrument communication is out of line. Inform the maintenance personnel in time to check the cause of the failure.

Electrical parameter report







Real-time power parameters and historical power parameters storage and 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. This feature makes it easy for users to conduct accident tracking queries.

Set the time you need to query, click the Query button to query the electrical parameter report of each loop at a certain time in history. The main data includes: three-phase voltage, three-phase current, active power, reactive power, power compensation factor, and electrical energy.

This report contains all the loops. Help users to understand whether voltage instability, current limit, power and power factor meet the requirements during system operation. Based on this, the system is better managed and optimized.

Reports can be exported as a spreadsheet with print capabilities. Click Print Report to print the report as needed.

Energy report

The integrity of the measurement system is reflected in a rich data report. The system has the function of counting and counting the periodic meter reading of each loop. The user can freely query the power consumption of each power distribution node in any time period since the normal operation of the system, that is, the statistical analysis of the power consumption of the incoming line of the node and the power consumption of each branch circuit. Report. This function makes the electricity use visible and transparent, and can be traced when the power consumption error is too large to maintain the correctness of the measurement system.





Energy report function

The management of power consumption is presented in the form of a report. The report can display the power consumption of each loop in any period of time during the system operation. Each incoming loop and its outgoing loop are made in a table, which is convenient for querying. .

By adjusting the start time and end time, you can display the power consumption during this time period.

The report can be exported as a spreadsheet with print capabilities.

Current curve

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.





Current curve function

The X axis of the curve chart represents the time span, the Y axis represents the range, and the corresponding loop refresh curve is selected to display the historical curve display of the selected circuit for one day and seven days;

The current curve helps the user to perform power quality analysis and fault analysis.

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.

System event

Select "Real-time events" to view the operation of each part of the system in the current state. Select "Event Query" to query the operation at any time.

4 Conclusion

In today's distribution facilities, the distribution safety of the substation is very important. The application of the Acrel-2000 power monitoring system introduced in this paper can be used to power the distribution circuit of the substation. The real-time monitoring can not only display the power consumption of the loop, but also have the network communication function, and can form a power monitoring system with the serial port server and the 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, providing a real and reliable basis for the factory to solve the problem of electricity consumption, and has achieved good business benefits.



references:

[1]. Ren Zhicheng Zhou Zhong. Principles and Application Guidelines of Power Electrical Measurement Digital Instrumentation [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



About the author: 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

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