Acrel-3200 remote prepaid power management system in Wutongshu Building

0Overview

This project is located in Hengqin District, Zhuhai City, which is the bridge between the high-end project in Hengqin Free Trade Zone and Macau.

The total construction area of ​​the project covers an area of ​​approximately 25079.31 square meters, including a seven-star hotel, with a total construction area of ​​173447 square meters and a building height of 188.8 meters; building floors: 40 floors above ground and 4 floors underground.

In this project, a set of intelligent electricity metering management system is designed for Zhuhai Wutongshu Building. This system is mainly aimed at the nature of tenants' electricity consumption, realizes the intelligent management of tenants' electricity consumption, and ensures the independence and safety of tenants' electricity consumption. Adopting the solution of one household, one meter, the tenants are equipped with Ankerui terminal prepaid electric energy meter ADF300 multi-circuit metering box to independently measure the electricity consumption of each tenant. The communication management machine collects the data of all terminal electric energy metering instruments through the RS-485 bus. The communication management machine transmits the data to the management computer through a dedicated network. The system management software stores and processes the data to form files in the form of graphics, text, etc. required by the property management party to realize the intelligent management of the tenants of Wutongshu Building.

1 Reference standard

ISO/IEC11801 "International Integrated Wiring Standard"

GB/50198 "Technical Specification for Monitoring System Engineering"

GB50052-2009 "Code for Design of Power Supply and Distribution System"

GB50054-2011 "Code for Low Voltage Power Distribution Design"

IEC 61587 "Electronic Equipment Mechanical Structure Series"

DL/T448-2000 "Technical Management Regulations for Electric Energy Metering Devices"

DL/T 698.1-2009 "Part 1: General Provisions"

DL/T 698.2-2010 "Part 2: Technical Specifications of the Master Station"

DL/T 698.31-2010 "Part 3.1: Technical Specifications for Electric Energy Information Collection Terminals-General Requirements"

DL/T/814-2002 "Function Specification for Distribution Automation System"

DL/T5137-2001 "Electricity Measurement and Electric Energy Metering Device Design Technical Regulations"

GB2887 "Technical Conditions of Computing Station Site"

GB/T18460.3 "IC Card Prepaid Electricity Sale System Part 3: Prepaid Electricity Meter"

2 system plan

Acrel-3200 remote prepaid electric energy management system is designed according to the actual situation of Wutongshu Building. The tenants on the floor are equipped with remote prepaid watt-hour meters. The local network is adopted and a collector is placed at the back-end server. , The remote prepaid watt-hour meter is connected to the collector hand in hand. The overall network structure is shown in the following figure: station control management layer, network communication layer and field device layer.

The field equipment layer is mainly: remote prepaid electricity meter. These devices are installed in the electrical cabinet corresponding to the corresponding primary equipment. These devices all adopt RS485 communication interface and communicate through the field MODBUS bus network to realize data collection on site.

The network communication layer is mainly: the communication server, whose main function is to collect the collection devices scattered in the field and transmit it to the station control layer at the same time to complete the data interaction between the field layer and the station control layer.

Station control management: equipped with high-performance industrial servers, displays, UPS power supplies, printers and other equipment. The monitoring system is installed on the server, collects and displays the operating status of field equipment in a centralized manner, and displays it to users in the form of human-computer interaction.

3 System function

The entire system software design is divided into three major blocks, namely the centralized meter reading service system, the remote prepaid power management system, and the user query system.

The centralized meter reading service program runs all year round, and remote meter reading is performed on all meters without interruption and time; the remote prepaid system includes all the functions of account opening, electricity sales, remote control and reporting; the user inquiry machine system is used for shops to query personal information, recharge and electricity Circumstances; In addition, the mobile phone query website can be configured, which can be used for shop users to query personal information, recharge, remote control and daily power consumption on the mobile website terminal in real time. If the conditions are met, users can also use Alipay, UnionPay and other methods for remote self-service Purchase electricity.

The main features are as follows:

Quick configuration, install and use: Import the configuration of the electric meter and communication management machine into the system and you can use it;

Remote centralized meter reading: manual meter reading is eliminated, and the real-time status of the meter can be accurate to within 3 minutes;

Support separate pricing, multi-rate, step electricity price: each meter can be set separately for electricity price, rate and step electricity price;

Remote electricity sales: centralized financial management, real-time delivery of electricity, and comparison of recharge times to prevent cheating;

Data security: network data transmission adopts financial-grade 3DES encryption algorithm to prevent data cheating and electricity theft;

Mobile phone SMS reminder: When the amount is insufficient or the amount is in arrears, there are a total of three levels of early warning, and merchants can be notified by SMS in time;

Remote control: A series of remote control operations such as remote switching or power protection can be performed on any meter, which is convenient for management;

Energy consumption analysis and query: both users and administrators can query the daily energy consumption status of prepaid meters or various connected meters;

Personal mobile phone query website: Support mobile phone users to purchase electricity and query independently.

The traditional IC card prepaid electricity sales management system realizes the management mode of paying the fee first and then using the electricity. However, because the meter reading data depends on the electricity purchase card, the user electricity data lags behind the time of occurrence, which not only requires manual meter reading, but also cannot Effectively conduct electricity management, monitoring and real-time control.

Using the remote prepaid power management system, without an IC card, it can realize computer remote centralized meter reading, real-time monitoring, remote recharge and remote control, and then through early warning information and SMS notification, as well as mobile website, the property management department can complete the entire meter reading , Toll collection, control and verification work, to achieve a high degree of information and automation, greatly improve the efficiency and level of electricity marketing management, save manpower and material resources, but also improve economic benefits, and also has the security function of preventing information leakage and preventing electricity theft.

â‘  Centralized meter reading service system

The centralized meter reading service program consists of three modules. In addition to the centralized remote meter reading of all meters at regular intervals throughout the year, it also integrates the alarm SMS sending service, which can automatically generate mobile phone SMS and send it to the counterparty. For shop users, this function needs to be used in conjunction with the hardware SMS modem.

By default, the system performs a remote centralized meter reading for all meters in half an hour, and the time interval supports personalized configuration.

Collection service

1 The centralized reading service will perform centralized remote reading of all meter status regularly, using Socket triple DES encryption technology, which is stable, reliable and safe

2 If the alarm SMS sending service is lower than the alarm amount and arrears, the user list will automatically generate SMS to inform the user

3 Data transfer service historical data transfer to improve database efficiency

â‘¡Remote prepaid power management system

The system is divided into five major modules, which are operator login module, system configuration module, user (shop) management module, electricity sales management module, and report center module. The general operation and operation process of the system is as follows:

All reports and record queries of this system support the export function of excel format.

1. Login management: manage operator account and authority assignment, check system log and other functions;

2. System settings: configure the building, communication management machine, instrument and default parameters;

3. User management: perform operations such as account opening, account cancellation, remote opening and closing, meter reading export and record query for shop users;

4. Electricity sales management: remotely sell electricity, return electricity, reconcile, and record inquiries on the account that has been opened;

5. Report Center: Provides inquiries about electricity sales financial reports, energy consumption reports, and alarm reports.

Login Management

1. Re-login and re-login to the sales system

2. Operator management can manage operators

3. Permission management assigns different permissions to operators

4. View operation log View operator operation log

5. Modify operator password modify operator password

System settings

6. Building group setting This function is used to maintain a collection with one or more power-consumption units, such as a unit with a building as a collection

7. Communication management machine settings are used to maintain the information of all communication management machines

8. Instrument setting account number setting is used to maintain the information of all instruments and supports batch import

9. Account number setting to maintain store number information

10. Default parameter settings The default settings of some commonly used parameters, mainly including "default power threshold", "collection time interval", "default alarm amount", "default electricity price", "hoarding amount upper limit", "alarm SMS number"

Customer management

11. Open an account to maintain user information, perform account opening operations on the meter, support the transfer of the old meter amount, support one account with multiple meters, and support users to add a meter after opening an account

12. Account Opening Query Query all current account opening records

13. Account cancellation The user cancels the account. After the account is cancelled, all tables linked to the user will execute the cancellation action, and the system automatically generates the cancellation record

14. Account cancellation query query historical account cancellation records

15. Batch operation

1) Query the status of all instruments, including remaining amount, opening and closing status, alarm information, etc.;

2) Electricity price issuance operation;

3) Setting and issuing operations;

4) Power protection, charge control opening, and direct opening operation;

5) Export the real-time status of all tables to XLS.

16. Query meter reading history record provides single meter reading history record query

Sales Management

17. Electricity sales sell electricity to users who have opened an account, support receipt printing, and automatically generate electricity sales records

18. Electricity sales query

19. Withdrawal of the electricity to the user table that has opened an account

20. Inquiry of Returned Power Records

21. Perform a repair and reset operation after the wrong operation when the power is sold

Report Center

22. Real-time alarm record report statistics query real-time alarm record

23. Daily sales report query daily settlement of financial statements

24. Monthly sales report query monthly financial statements

25. Annual sales report query annual financial statements

26. Inquiry of Lost Contact Form

27. Report of Lost Communication Management Machine Inquiry of Lost Communication Management Machine

28. The energy consumption analysis report forms the daily query of electricity consumption by selecting the date range and the geographic location (by building, floor or account number).

29. Energy consumption query of metering instrument can query the energy consumption difference of various connected other metering instruments of our company (ACR/PZ/DTSF, etc.) according to time period, metering loop and other conditions, as well as remote meter reading value.

30. Alarm record query query historical alarm record

The system not only supports one household with one meter, but also supports one household with multiple meters; at the same time, it supports and solves the problem of transferring the amount of old meters when the new and old meters are switched after the project transformation; supports peak and valley electricity prices, and supports one meter. Table 1 Electricity price; you can set the power overload threshold for the single meter, and also support the setting of the two-level threshold for the single meter amount alarm.

In batch remote operation scenarios, the system provides a number of functions, with different color displays for account opening, alarm 1, alarm 2, arrears, no account opening, and disconnection status; and it supports remote control of the instrument and remote control command types as follows:

1. Electricity price issuance; 2. Setting issuance (issuing alarm amount threshold and overload power threshold); 3. Guaranteed power (forced meter closing); 4. Recovering prepayment (automatic tripping mode for arrears); 5. Switch off (forced power off); 6. Export meter reading (export all current meter status to EXCEL)

Selling electricity

The system also provides multiple reports for inquiries, including daily/monthly/yearly financial sales statistics, lost connection/communication management machine inquiry reports, energy consumption inquiry reports, real-time alarm/historical alarm inquiry reports, and support for export. The following is the daily energy query report of the financial statement and prepayment table:

4 Conclusion

With the advancement of social production, while commercial users' electricity consumption continues to increase and their requirements for power supply quality continue to increase, there are also a large number of arrears in electricity bills, which greatly increases the operating risks of power supply companies. In order to enable power supply companies to increase the collection rate of electricity charges and avoid economic losses caused by malicious arrears, our company provides a complete set of prepayment solutions. The system can not only collect electricity charges in advance, realize "pay first, use electricity later", but also target users The nature of electricity consumption can be selectively limited when the electricity supply is tight or in response to the government's call for "energy saving and emission reduction". The on-site remote prepayment system realizes the payment of the fee before the use of electricity, which can avoid the problem of the property company’s electricity bill advancement, thereby alleviating the financial pressure of the business just operating, and isolating the owner from the power distribution area to prevent private connection The problem of stealing electricity.

About the author: You Xiaoyun, female, undergraduate Ankerui Electric Co., Ltd., the main research direction is smart grid power supply and distribution Email: mobile QQ