Acrel-3000 Power Management System Application in North New District Hospital, Zhaotong City, Yunnan Province

Abstract: The new district hospital in the northern part of Zhaotong City uses a smart power meter to collect various electrical parameters and switch signals at the distribution site. After networking, it communicates via the field bus and transmits it to the background remotely. The Acrel-3000 power management system realizes the circuits in the hospital. Electricity real-time monitoring and power management.

Key words: North New District Hospital of Zhaotong City; smart power meter; Acrel-3000; power management;

0 Preface

With the continuous development of electric power networks, the continuous increase in the use of electricity load, various new types of loads are emerging, users are more concerned about the issue of electrical energy, but also put more stringent requirements on electrical energy. Users need more effective power management management solutions to meet the challenges brought about by these changes in order to achieve continuous, reliable, efficient and low-cost operation of the power distribution system.

Acrel-3000 is an integrated power management system that utilizes intelligent power monitoring devices, combined with fieldbus and Ethernet communication technologies, using computer and software technologies. Using a distributed network structure, the company has realized the overall management of the enterprise power distribution terminal and realized the real-time monitoring, acquisition and analysis of energy data for high and low voltage systems and other equipment.

1. Project Overview and Construction Objectives

Located in the northeastern part of Yunnan Province, Zhaotong North New District Hospital is located at the junction of the three provinces of Yunnan, Guizhou, and Sichuan. The hospital is located at the intersection of Weixin Road and Caiyun Road in Zhaoyang Industrial Park, Zhaotong City. The hospital will be oriented to the Zhaoyang District with a "professional and small-integrated" operation model to radiate Quantongtong City. General surgery, orthopaedics, internal medicine, intensive medicine, emergency department, gynecology, obstetrics, stomatology, ophthalmology, otorhinolaryngology, geriatrics, traditional Chinese medicine and other departments, and set up "five centers" (dialysis center, physical examination center, Physical therapy rehabilitation center, inspection center, radiology imaging center). Among them, the Department of Geriatrics will be involved in the new concept of "integration of medical care and health care." The elderly will be provided with multiple services such as medical care, nursing care, rehabilitation, life care and entertainment.

This project will collect real-time data from the Ankerui smart power meter in the North New District Hospital of Zhaotong City, Yunnan Province, and display the status of the primary map and the voltage, current, and power of each power circuit in real time through data processing. The power consumption of the loop customizes the energy report.

2. Design of power management system

In the design of the monitoring system, we must fully consider the actual needs of customers, as well as the actual structure of the power system, the actual load capacity of the power system, and other factors, and then choose a reasonable monitoring equipment, which is not only conducive to reducing the cost of system operation, but also It is conducive to the realization of system functions.

The power management system of this project can realize the real-time monitoring of the distribution circuit in the station, which is conducive to the power management. On the other hand, the power management system can not only accurately show the power status of the loop, but it also has network communication and other functions. It can be combined with computers, serial servers and other devices to display the status of each distribution circuit in the station. When the load of the power system in the station is over-limit, the power management system can quickly alarm and issue voice prompts. In addition, the energy management system can also generate statistical information, such as reports and graphs, to facilitate the analysis of power consumption in various parts of the station and improve the work efficiency of hospital equipment maintenance personnel.

2.1 System Structure

According to the distribution situation of the distribution network of the North New District Hospital of Zhaotong, the online monitoring system construction adopts a hierarchical distributed structure. The system includes: station management layer, network communication layer, and field device layer. The network structure of the system is shown in the figure:

The direct window of human-computer interaction between the management and management personnel of the management team and the computer calculates, analyzes, and processes various types of data collected on the site, and reflects the operating status of the site in terms of graphics, digital display, sound, etc. The upper part. Mainly by the system software and necessary hardware equipment, such as industrial-grade computers, printers, UPS power supply and other components.

The device used by the communication layer is a serial server. This layer is a bridge for data information exchange. It is responsible for the collection, classification, and transmission of data information sent back by field devices, and it also conveys various control commands from the upper computer to the field devices.

The field device layer is mainly connected to various types of instruments used for the collection and measurement of electrical parameters in the network, and it is also a necessary basic element for constructing the distribution system. The ARC72 series and DTSD1352 series instruments of Arcore are configured on site to realize three-phase current, three-phase voltage, frequency, power and isoelectric parameters monitoring of the low-voltage loop; and the status of each circuit breaker's closing and closing is monitored.

2.2 Network Design

The network system in the power management system can transmit data in time and quickly transfer operation instructions, which is the basis for realizing various functions of the power management system. Connect each device on-site with the bus in the field, and then connect all busses to the communication collector to realize the transfer with the host.

2.3 monitoring system software function design

The system is designed according to the customer's actual needs and realizes a main wiring diagram interface display; electric parameter remote measurement and electric parameter crossing limit alarm; event recording; system operation abnormality monitoring; fault alarm and operation record; report query and printing; system load real-time , history curve, user rights management and other main functions.

2.3.1 Data Acquisition and Processing

Data acquisition mainly includes analog and digital acquisition. The acquisition of analog quantity mainly collects the information of line voltage, current, power, power factor, frequency, etc. The collection of switch quantity is mainly to collect the alarm information of circuit breaker working status, power-off protection and operation fault. Realize local real-time display of remote data. The data processing mainly displays the electrical parameters collected according to requirements in real time and accurately to the user, so as to meet the automation requirements of the power distribution monitoring, and store the collected data in the database for the user to query.

2.3.2 Data Report Statistics

The energy management system reflects the integrity of the metrology system with 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.

2.3.3 Current Curve Query

The power management system designs a load trend curve 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. Secondly, the data recording function of the power management system also includes the recording of fault information, that is, recording and storing the real-time current, real-time voltage and other data when the fault occurs. The power management system can manage the setting of voltage, current and power by the management personnel, thus real-time monitoring of the distribution situation, whether there is short circuit or overload, etc., which is convenient for the staff to solve.

2.3.4 User Rights Management

Power Management System For the project's safe and stable operation, user rights management can prevent unauthorized operations (such as the distribution circuit name changes). You can define login names, passwords, and operating rights for users at different levels, and ensure reliable security for system operation, maintenance, and management.

3. The significance of building an energy management system

With the development of society and the wide application of electricity, the power management system has become an inevitable choice for large-scale multi-substation users in major engineering projects and industrial enterprises throughout the country. The Acrel-3000 energy management system introduced in this article is in Zhaotong City, Yunnan Province. The application of the Northern New District Hospital can realize the real-time monitoring and power management of substation high and low voltage distribution circuits. It can not only show the power status of the circuit, but also has network communication functions, and can be composed of serial servers, computers, etc. system. The system analyzes and processes the collected data, displays the running status of each distribution circuit in the substation in real time, has a pop-up alarm dialog box and voice prompts for the closing and closing of the load, and generates various energy reports and analysis curves. Graphics, etc., to facilitate remote meter reading and analysis, research. The system is safe, reliable and stable, providing real and reliable basis for substation users to solve power problems, and has achieved good economic benefits. [2]

references:

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

[2]. Zhou Zhongzhong. The product selection and solution of smart grid user end power management and power management system [M]. Beijing. Machinery Industry Press. 2011.10

About the author: Cui Tingyu, male, undergraduate, Jiangsu Ankerui Electric Manufacturing Co., Ltd., the main research direction for intelligent building power supply and distribution monitoring system. Email:el.cn QQ Mobile Phone Fax Website: http://