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

Anke Rui Qiu Hong

Jiangsu Ankerui Electric Appliance Manufacturing Co., Ltd., Jiangyin, Jiangsu 21405, China

Overview

China Aircraft Strength Research Institute (623)

The China Aircraft Strength Research Institute is affiliated to the China Aviation Industry Corporation No. 623, and is the only aircraft strength research center and ground strength verification test base of the Chinese aviation industry.

The main work direction of the 623 Institute is: responsible for pre-study of aircraft structural strength technical field, providing structural strength key technologies for the development and modification of new aircrafts; being responsible for undertaking ground strength verification tests for full-scale aircraft structures, representing the country's new research and modification The aircraft gives authoritative strength conclusions before the first flight, and provides authoritative test data for aircraft life, life extension and reliability assessment.

This project is located at the intersection of Hewei Road and Jingsan Road of Nanweichang Road, Pudong New Area, Shanghai. It is an energy management system designed for the China Aircraft Strength Research Institute (623), the No. 201 all-aircraft static/fatigue test facility and No. 202 power center.

1, demand analysis

There are four substations on site, namely 10KV Substation, 201 Total Station Static/Fatigue Test House Substation, No. 202 Power Center Substation and Air Compressor Power Distribution Station. The power management system needs to implement centralized data management, analysis and processing. The software probably functions as follows:

The monitoring information such as voltage, current, power, power factor and frequency is refreshed in real time and visually and dynamically displayed in a single graph. Each circuit sub-screen displays information on each circuit's electrical parameters and circuit names.

A trend curve is drawn for each circuit's current to facilitate analysis of the circuit's distribution operating conditions.

The power collection function of each loop can be used to generate a power report that meets customer management requirements during the time period.

Real-time communication status display for each loop meter.

SOE events are queried on the high pressure section.

The real-time temperature alarm on the transformer part makes it easy to understand the status of the field transformer in real time.

Multi-user rights management facilitates hierarchical operations.

This technical condition is applicable to the transformer room of the June 23 Institute. The supplier's products should have high safety and reliability, be easy to expand, and be easy to maintain and maintain. The product provided by the supplier shall meet at least the technical conditions, but it is not limited to this. The technical performance of the supplier shall meet the requirements for data monitoring of the power distribution room.

2, system plan

The monitoring system mainly implements power monitoring and power management for the 263 substations. Comprehensive protection device for monitoring range of 10KV transformer room; Comprehensive protection device for transformer/distribution station of No. 201 plant for static/fatigue test; Transformer temperature controller; Multi-function instrument for low voltage inlet and outlet lines; The transformer temperature controller, low-voltage inlet and outlet line multi-function instrument; comprehensive protection device of air compressor power distribution. System access to the No. 201 whole machine static/fatigue test plant Transformer and power substation 2 integrated protection devices, 62 multi-function meters, 2 transformer temperature control instruments are divided into 8 buses, the bus directly access the data in this substation Collecting box, upload data through optical fiber to the host of the 202 transformer room duty room; 10 KV transformer room 10 comprehensive protection devices, No. 202 power center transformer, 46 multi-function instruments, 2 transformer temperature controller, air pressure The three comprehensive protection devices of the power distribution branch are divided into 8 buses. The bus directly connects to the serial server in the substation, so that the data communication between the meters on the bus and the monitoring host can be realized on the monitoring host. As shown in the following figure: Station management layer, network communication layer and field device layer.

System network topology

1) Station control management

Station management's management personnel for power management systems are a direct window for human-computer interaction. 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 NPORT5610 serial port server, Ethernet equipment and bus network. The main function of NPORT5610 serial port server is to monitor on-site smart meters, integrated protection devices, DC screens, and transformer temperature controllers; the main functions of Ethernet equipment and bus network are to realize data exchange, to make the distribution system management centralized, information, and intelligent. It has greatly improved the safety, reliability and stability of the distribution system and has truly achieved unattended operation.

3) Field device layer

The field device layer is a data collection terminal, which is mainly composed of a smart meter, a comprehensive 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 reaches the power distribution room monitoring host for networking and remote monitoring.

Smart meter on-site connection

The on-site instrument is connected in a hand-in-hand manner through a shielded twisted pair (RVVSP2*1.0). The number of smart meters per bus is about 20, and then the data is uploaded to the serial server NPORT5610, and the data is then uploaded to the local monitoring terminal. The specific connection diagram is as follows:

The low-voltage line and feeder circuit uses a multi-function meter, which can measure all conventional power parameters such as: three-phase voltage, current, power factor, frequency, active power, and reactive power.

3, system function

Features

The system adopts an all-Chinese interface, which is simple and convenient to operate; stable and reliable; the system has a system diagram display, simulation diagram display and network structure diagram display; the system provides a friendly human-machine interface, all operations can be carried out on the interface, And it has a remote display function.

login interface

In order to ensure the safe and stable operation of the system, user rights management functions have been set up. User rights management can prevent unauthorized operations (such as distribution circuit name modification, etc.). Define login names, passwords, and operation rights for users at different levels to provide reliable security for system operation and maintenance. The user's level is divided into three levels: operator, engineer, and system administrator. Each level can be assigned to a different operation authority, including entering operation, exiting operation, and report management. The system administrator is the highest level user. Users at a higher level can add or delete the next level of users.

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

The title screen shows the current login user and system current time.

The current interface corresponds to various parameters displayed in the system interface.

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

Distribution monitoring interface

Power distribution monitoring

You can view the distribution and connection of the distribution circuits and the main electrical parameters. The main data includes: three-phase current, electric energy.

When you choose to log in to the system as "Administrator", you can click on the loop name in the system diagram once to directly modify the loop name. After the modification, the system will save it automatically. In the system diagram, the on and off of each circuit will be indicated by switching between red and green, red means that the circuit is on, and green means that the circuit is off.

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

Temperature controller interface

This interface allows the temperature of the temperature controller to be in real time.

Communication status

The communication status of each device in the access system can be displayed in real time, and the entire system network structure can be completely displayed. The network communication status of the system can be diagnosed online. When a network failure occurs, faulty units and fault locations can be automatically displayed on the screen. In this way, the system maintenance personnel can easily grasp the communication status of each device on the site in real time, timely maintain the abnormal equipment, and ensure the stable operation of the system.

Communication state diagram

The communication status can see the distributed network structure of the entire system, which has network diagnostic functions. The system network communication status can be monitored in real time. When a network failure occurs, the system automatically displays faulty circuits and specific units. Red indicates that the communication is normal, and green indicates that the instrument is out of communication. Inform the maintenance personnel to check the cause of the failure.

Electrical Parameters Report

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 real-time database. In the monitoring screen, you can customize the parameters to be queried, the time period of the query, or the number of records that were recently updated by the query, and display them by means of reports. This function is convenient for users to conduct accident retrospective inquiries.

Set the time required to query, click the query button to query the electrical parameters report of each circuit at a certain moment in history. The main data includes: three-phase voltage, three-phase current, active power, reactive power, power compensation factor, and electric energy.

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

Reports can be exported in a spreadsheet format with printing capabilities. Click Print Report and print the report as needed.

Energy report

The integrity of the measurement system is reflected in rich data reports. The system has the functions of periodical meter reading and statistics collection. Users can freely inquire about the power usage of each distribution node in any time period since the normal operation of the system, that is, the power consumption of the node's incoming line and the power consumption of each branch circuit. Report. This function makes electricity visible and transparent, and can trace back when the error of power consumption is too large, and maintain the correctness of the measurement system.

Energy report function

The management of electricity consumption is presented in the form of a report. The report can present the power consumption of each circuit during any period of time during the operation of the system. Each inlet circuit and its outlet circuit are produced in a table, which facilitates the query. .

By adjusting the start time and the end time, the power consumption during this time period can be displayed.

The report can be exported in a spreadsheet format with printing capabilities.

Current curve

The current curve is designed for the total incoming circuit of the distribution system (or the outgoing line of important loads). It is convenient for distribution maintenance personnel to grasp the power demand and the power system load share in time, ensure the reliability of power supply, and provide protection for users' rights and interests. With this function, it is also possible to analyze the growth trend of energy demand, timely adjust demand reports, and reduce unnecessary payment due to excessive demand deviation.

Current curve function

The X-axis of the curve chart represents the time span, and the Y-axis represents the range. Select the corresponding loop refresh curve to display the one-day and seven-day history curve display of the selected loop.

The current curve can help users 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 the current or voltage exceeds the limit and the alarm limit is reached, the corresponding real-time alarm window will automatically pop up and display the specific alarm information in red font: the circuit name, the over-limit electrical parameter, and the alarm value.

Historical alarm

By adjusting the start time and end time, you can query the system alarm information in any time period in the past, including telemetry alarms and remote alarms, as well as the specific alarm time, alarm type, and alarm content.

System events

Select “Real-time event” to view the current status of each part of the system. Select “event query” to query the operation status at any time.

4 Conclusion

In the application of power distribution facilities today, the power distribution security of substations is of utmost importance. The application of the Acrel-2000 power monitoring system introduced in this article can realize the power supply to substation power supply and distribution circuits at the 62nd. The real-time monitoring can not only show the power status of the loop, but also has the function of network communication. It can be combined with serial server, computer and other components to form a power monitoring system. The system analyzes and processes 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 prompts, and a short message warning light, and generates various energy reports. , Analysis of curves, graphics, etc., to facilitate remote meter reading and analysis of electricity, research, the system is safe, reliable, stable, to provide a real and reliable basis for the factory to solve electricity problems, and achieved a good business efficiency.

references:

[1]. Ren Chengcheng, Zhou Zhong. Principles and Application Guide for Digital Meters for Electric Power Measurement [M]. Beijing. China Electric Power Press, 2007. 4

[2].Zhou Zhouzhong, et al. Product Selection and Solution for Smart Grid User-end Power Monitoring and Power Management System[M]. Beijing. Machinery Industry Press. 2011.10

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