Design and Application of Energy Management System in Suzhou Ouchasha Chinese Food City

An Kerui Cui Tingyu

Jiangsu Ankerui Electric Appliance Manufacturing Co., Ltd.

Abstract: This paper presents an energy management system implemented at Suzhou Ouchasha Zhonghua Food City. The system utilizes smart power meters and prepayment meters to gather various electrical parameters and switch signals from the distribution site. It employs a local network setup, allowing communication through fieldbus protocols and data transmission to the backend system. The Acrel-3000 power management system supports pre-payment alerts, real-time monitoring, and efficient power distribution control.

Keywords: commercial-residential integration; Ouchasha Zhonghua Food City; floor; prepaid meter; Acrel-3000; power management system; sales management software

0 Overview

Europa Chinese Food City, a top 500 service company in China, is proudly established by the Europa Group. Located in the Vice Center of Yuexi City, it is situated within a large shopping mall and a 5 million square meter community. Proximity to Xingang Road Station on Line 4 of the rail transit, as well as the Youxin Elevated Highway and Ring Expressway, makes it highly accessible. The project aims to implement a comprehensive energy management solution for the 0.4kV floor distribution systems of the food city.

The system is designed to manage power distribution across multiple floors, ensuring transparency, safety, and efficiency in electricity usage. It integrates with the prepayment electricity sales system to support accurate billing for shop owners, enhancing operational control and reducing risks associated with unpaid electricity consumption.

The Acrel-3000 low-voltage intelligent power distribution system leverages modern advancements in electronics, computing, networking, and fieldbus technologies. It enables distributed data collection and centralized monitoring, connecting scattered devices into a unified system for remote supervision and efficient power management.

1 System Structure Description

The system monitors and manages the 0.4kV floor distribution system, covering 52 DTSY1352-C floors, 602 DDSY1352-C meters, 35 PZ96, and 17 PZ72 units. These are connected to three serial servers, with the main building equipped with background monitoring and charging management. Auxiliary buildings connect via fiber-optic communication through local collection boxes.

The system follows a hierarchical structure: station control layer, communication layer, and bay layer. The bay layer includes multi-function network power meters that communicate via RS485 and MODBUS protocol. The communication layer consists of servers that collect and transmit data to the station control layer. The station control layer features industrial computers, monitors, and other equipment for real-time monitoring and user interaction.

The communication interface uses RS485, which offers noise immunity and supports up to 32 devices over a distance of 1.2 km. Data transfer rates can reach up to 10 Mbps, making it suitable for reliable and efficient power management.

2 Main Functions of the Power Management System

2.1 Data Acquisition and Processing

Data acquisition is essential for power distribution monitoring. Multi-function meters collect real-time data such as voltage, current, power, frequency, power factor, and energy. Processed data is stored in a database for user access and analysis.

2.2 Human-Computer Interaction

The system provides an intuitive interface, displaying electrical diagrams, real-time parameters, and device statuses. It supports dynamic screen updates, analog displays, and alarm notifications for quick response to issues.

2.3 Historical Events

Users can view historical records of faults, operations, and alarms, enabling effective troubleshooting and system optimization.

2.4 Database Establishment and Query

The system maintains a database for regular reporting and allows users to query and print detailed reports on energy consumption and system performance.

2.5 User Rights Management

Different user levels have distinct permissions to prevent errors and ensure secure operation. Users can log in, change passwords, and manage their accounts easily.

2.6 Remote Report Query

The report system generates customized reports based on user needs, supporting time-based queries, data export, and printing. This enhances decision-making and operational efficiency.

3 Power Selling Software Function

The software includes login management, system settings, customer management, IC card operations, data querying, and database management. These features streamline electricity sales and enhance user experience.

4 Case Studies

At Suzhou Ouchasha Zhonghua Food City, the system ensures accurate monitoring of each floor’s power distribution. It uses DTSY1352-C and DDSY1352-C meters for precise measurement and PZ series meters for general use. The system also supports remote signaling, telemetry, and alarm functions, improving response times and operational safety.

The system’s communication structure allows real-time monitoring of equipment status, with visual indicators showing normal or failed communication. Reports on energy consumption and system performance help in efficient resource planning and maintenance.

5 Concluding Remarks

As electricity becomes more integral to daily life, power monitoring systems like Acrel-3000 are vital for large-scale facilities. They provide real-time insights, enhance security, and improve efficiency. The implementation at Suzhou Ouchasha has proven successful, offering a reliable and scalable solution for power management and sales, contributing to both operational and social benefits.

References

[1] Ren Cheng, Zhou Zhongzhong. Principles and Application Guide for Digital Meters for Electric Power Measurement. Beijing: China Electric Power Press, 2007.

[2] Zhou Zhouzhong et al. Product Selection and Solution for Smart Grid User-end Power Monitoring and Power Management System. Beijing: Machinery Industry Press, 2011.

About the Author: Cui Tingyu, male, undergraduate, Jiangsu Ankerui Electric Appliance Manufacturing Co., Ltd. Research focus: intelligent building power supply and distribution monitoring systems. Email: el.cn. Mobile: [XXX]. Fax: [XXX]. Website: http://[URL]