ACREL Multifuntion Energy Meter Application  in Mozambique

摘要：本文介绍了安科瑞多功能电力仪表在莫桑比克某农场的应用以及电能管理系统解决方案。系统采用智能电力仪表采集配电现场的各种电参量和开关信号，采用现场就地组网的方式，组网后通过现场总线通讯并远传至后台。通过Acrel-3000型电能管理系统实现变电所配电回路用电的实时监控和电能管理。

Abstract：This article introduces the application of the multi-function energy meter in a farm in Mozambique and the solution of energy management system. The system adopts intelligent power meters to collect various electrical parameter and switching signals at the distribution site and the way of local networking, communicate via field bus and upload to background after networking.

关键词：电能表;智能电力仪表;电能管理系统

Keywords：Energy meter；Industrial projects；Intelligent power meter；Energy management system

0 概述 Project Overview

该农场位于莫桑比克楠普拉，主要使用了多功能电力仪表APM800和开口式互感器，用于电能和功率计量，并具有事件记录和数据报表导出功能。

Acrel-3000型电能管理系统对变配电系统进行分散数据采集和集中监控管理。对配电系统的二次设备进行组网，通过计算机和通讯网络将分散的配电所的现场设备连接为一个有机的整体，实现电网运行的远程监控和集中管理。

The farm is located in Nampula, Mozambique, and mainly uses a three-phase electric energy meter APM800 and split core current transformers.It is used for electric energy and power measurement, and has event recording and data report export function.

Acrel-3000 energy management system provides decentralized data acquisition and centralized monitoring and management of the substation and distribution system. It networks the secondary equipment of the power distribution system, connects the field equipment of scattered substation into an organic whole through computer and communication network, realizes remote monitoring and centralized management of grid operation.

1 系统介绍 System Introduction

本监控系统采用分层分布式结构，即设备层，通讯层与站控管理层。

现场设备层主要为多功能网络电力仪表，这些装置对应的一次设备分别安装在电气柜内，这些装置均采用RS485通讯接口，通过现场MODBUS总线组网通讯，实现数据现场采集。

网络通讯层主要为工业串口服务器，其主要功能为把分散在现场的采集装置集中采集，同时远传至站控层，完成现场层和站控层之间的数据交互。

站控管理层设有高性能工业计算机、显示器、UPS电源、打印机等设备。监控系统安装在计算机上，集中采集显示现场设备运行状况，以人机交互的形式显示给用户。

This system adopts a hierarchical distributed structure,that is，the equipment layer, the communication layer and the station control management layer.

The equipment layer is mainly multi-function energy meters. The corresponding primary equipment of these devices are respectively installed in the electrical cabinet. These devices all adopt RS485 communication interface,and realize data collection through field MODBUS network communication.

The communication layer is mainly an industrial serial server.Its main function is to centrally collect the devices scattered in the field and transmit data to the station control management layer at the same time to complete the data interaction between the equipment layer and the station control management layer.

The station control management layer is equipped with high-performance industrial computers, monitors, UPS power supplies, printers and other equipment.The system is installed on the computer, collects and displays the operating status of the field equipment, and displays it to the user in the form of human-computer interaction.

2 电能管理系统主要功能 Main Function

2.1  数据采集与处理 Data acquisition and processing

数据采集是配电监控的基础，数据采集主要由底层多功能网络仪表采集完成，实现远程数据的本地实时显示。需要完成采集的信号包括：三相电压U、三相电流I、频率Hz、功率P、功率因数COSφ、电度EpI、远程设备运行状态等数据。

数据处理主要是把按要求采集到的电参量实时准确的显示给用户，达到配电监控的自动化化和智能化要求，同时把采集到的数据存入数据库供用户查询。

Data collection is the basis of power distribution monitoring. The data collection is mainly completed by the bottom multi-functional network instrument collection to realize the local real-time display of remote data.

The signals that need to be collected include: three-phase voltage U, three-phase current I, frequency Hz, power P, power factor COSφ, electricity EpI, remote device operating status and other data.

Data processing is mainly to display the electrical parameters collected as required to users in real time and accurately to meet the requirements of automation and intelligence for power distribution monitoring. At the same time, the collected data is stored in the database for users to query.

2.2  人机交互Human-computer interaction

系统提供简单、易用、良好的用户使用界面。采用全中文界面，图形显示低压配电系统电气一次主接线图，显示配电系统设备状态及相应实时运行参数，画面定时轮巡切换；画面实时动态刷新；模拟量显示；开关量显示；连续记录显示等。

The system provides a simple, easy-to-use and good user interface. Adopt full Chinese interface, graphically display the primary electrical wiring diagram of low-voltage power distribution system, display the status of power distribution system equipment and corresponding real-time operating parameters, the screen will switch regularly; the screen will be dynamically refreshed in real time; analog display; switch display; continuous recording display etc.

2.3  历史事件Historical events

历史事件查看界面主要为用户查看曾经发生过的故障记录、信号记录、操作记录、越限记录提供方便友好的人机交互，通过历史事件查看平台，您可以根据自己的要求和查询条件方便定位您所要查看的历史事件，为您把握整个系统的运行情况提供了良好的软件支持。

The historical event viewing interface mainly provides convenient and friendly human-computer interaction for users to view the fault records, signal records, operation records, and limit violation records that have occurred. Through the historical event viewing platform, you can conveniently locate the historical event you want to view according to your own requirements and query conditions, and provides good software support for you to grasp the operation of the entire system.

2.4  数据库建立与查询Database establishment and query

主要完成遥测量和遥信量定时采集，并且建立数据库，定期生成报表，以供用户查询打印。

It mainly completes the timing collection of remote measurement and remote information, and establishes a database, and generates reports on a regular basis for users to query and print.

2.5  用户权限管理User authority management

针对不同级别的用户，设置不同的权限组，防止因人为误操作给生产，生活带来的损失，实现配电系统的安全，可靠运行。可以通过用户管理进行用户登录、用户注销、修改密码、添加删除等操作，方便用户对账号和权限的修改。

For users of different levels, different authority groups are set to prevent the loss of production and life due to human misoperation, and realize the safe and reliable operation of the power distribution system.Users can log in, log out, modify passwords, add and delete operations through user management, which is convenient for users to modify accounts and permissions.

2.6  报表查询Report query

报表管理程序的主要功能是根据用户的需要设计报表样式，把系统中处理的数据经过筛选、组合和统计生成用户需要的报表数据。本程序还可以根据用户的需要对报表文件采用定时保存、打印或者召唤保存、打印模式。同时本程序还向用户提供了对生成的报表文件管理功能。

报表具有自由设置查询时间实现日、月、年的电能统计，数据导出和报表打印等功能。

The main function of the report management program is to design report styles according to the needs of users, filter, combine and count the data processed in the system to generate report data that users need.This program can also adopt the regular saving, printing or summon saving and printing modes for the report file according to the needs of users.At the same time, this program also provides users with the function of managing the generated report files.

The report has the functions of freely setting the query time to realize the electric energy statistics of the day, month and year, data export and report printing.

3 产品介绍Product Introduction