安科瑞 劉秋霞

Application of power management system in transformer distribution system Renovation project of Inner Mongolia Meng Niu Dairy (Group) Co., Ltd.

摘要：本文介紹蒙牛乳業（當陽）有限公司低壓系統改造電力監控系統，采用智能電力儀表、采集配電現場的各種電參量和開關信號。系統采用現場就地組網的方式，組網后遠傳至后臺，通過Acrel-2000型電力監控系統實現配電室配電回路用電的實時監控和管理。

Abstract: This article introduces the low-voltage system of Inner Mongolia Meng Niu Dairy (Group) Co., Ltd. to transform the power monitoring system, using smart power meters to collect various electrical parameters and switching signals at the distribution site. The system adopts the method of on-site networking. After networking, it is remotely transmitted to the background. The Acrel-2000 power monitoring system realizes real-time monitoring and management of power distribution circuit power in the distribution room.

0 概述 Overview

隨著社會經濟發展、生產自動化程度的提高、勞動力的解放和生活質量的改良，大量電能驅動設備投入到生產、生活中，人們對電力的依賴程度越來越高。供電的可靠性、連續性已經成為整個社會關心的重要問題之一。由于供電系統具有產生和消費同時發生的特殊性，對整個供電過程進行監控，是保證供電可靠性和連續性的重要手段。

With the development of social economy, the improvement of production automation, the liberation of labor and the improvement of quality of life, a large number of electric power-driven equipment is put into production and life, and people's dependence on electricity is getting higher and higher. The reliability and continuity of power supply have become one of the important issues of concern to the entire society. Since the power supply system has the particularity of simultaneous production and consumption, monitoring the entire power supply process is an important means to ensure the reliability and continuity of power supply.

蒙牛乳業（當陽）有限公司位于湖北省當陽市，現場共有1個配電室。

Inner Mongolia Meng Niu Dairy (Group) Co., Ltd. is located in Dangyang City, Hubei Province. There is a power distribution room on site.

本次項目主要涉及蒙牛乳業（當陽）有限公司配電室內的網絡多功能儀表、微機保護等設備，監控主機位于1層的值班室。

This project mainly involves network multi-function meters, microcomputer protection and other equipment in the power distribution room of Inner Mongolia Meng Niu Dairy (Group) Co., Ltd. The monitoring host is located in the duty room on the first floor.

1 需求分析 Demand analysis

為保證生產管理用電負荷的統計與分析及對危險源實時監控。需要對項目現場的配電室中進線及出線回路進行電壓、電流、功率等參數進行實時在線監控。一旦監控點被監視參數異常，能夠及時檢測報警，有關人員采取必要的措施，避免安全事故的發生。自動抄表功能節省了人力物力，功率趨勢曲線功能能夠直觀的顯示各回路的工作狀態與時間，方便用戶找出非正常用電回路并且及時進行整改，建立電能多級計量體系提供用能分析依據。

To ensure the statistics and analysis of electricity load for production management and real-time monitoring of dangerous sources. Real-time online monitoring of voltage, current, power and other parameters in the power distribution room at the project site is required. Once the monitoring point is monitored with abnormal parameters, it can detect and alarm in time, and relevant personnel can take necessary measures to avoid safety accidents. The automatic meter reading function saves manpower and material resources, and the power trend curve function can intuitively display the working status and time of each circuit, which is convenient for users to find abnormal power circuits and rectify them in time, and establish a multi-level electric energy measurement system to provide energy analysis basis .

2 系統方案 Structure

安科瑞Acrel-2000系統根據蒙牛乳業（當陽）有限公司低壓系統改造電力監控系統現場實際情況，整體網絡結構采用屏蔽雙絞線直接接至數據采集器然后將數據上至配電室的監控主機，保障了電力監控系統傳輸的穩定性與實時性。

Acrel-2000 system is based on the actual situation of the low-voltage system of Inner Mongolia Meng Niu Dairy (Group) Co., Ltd. to transform the power monitoring system on site. The overall network structure uses shielded twisted pair to directly connect to the data collector and then send the data to the power distribution room for monitoring The host ensures the stability and real-time transmission of the power monitoring system.

1）站控管理層 Control Centre

站控管理層針對電力監控系統的管理人員，是人機交互的直接窗口。在蒙牛乳業（當陽）有限公司低壓系統改造電力監控系統工程中主要指置于一層配電室的監控主機。

The control centre is the direct window of human-computer interaction for the management personnel of the power monitoring system. In Inner Mongolia Meng Niu Dairy (Group) Co., Ltd. low-voltage system transformation power monitoring system project, it mainly refers to the monitoring host located in the power distribution room on the first floor.

2）網絡通訊層 Network

通訊層主要是由采集器、以太網設備及總線網絡組成。串口服務器主要功能是監測現場智能儀表；以太網設備及總線網絡的主要功能是實現分站與主站之間的數據交互，使配電系統管理集中化、信息化、智能化，很大提高了配電系統的安全性、可靠性和穩定性，達到了無人值守的目的。

The network is mainly composed of collectors, Ethernet devices and bus networks. The main function of the serial server is to monitor on-site intelligent instruments; the main function of Ethernet equipment and bus network is to realize the data interaction between the substation and the main station, so that the management of the distribution system is centralized, informatized, and intelligent, which greatly improves The safety, reliability and stability of the power distribution system have achieved the goal of unattended operation.

3）現場設備層 Device

現場設備層是數據采集終端，主要由智能儀表組成，智能儀表通過屏蔽雙絞線RS485接口，采用MODBUS通訊協議總線型連接接入通訊服務器，經通訊服務器到達該配電間監控主機進行組網，實現遠程控制。

The device layer is the data acquisition terminal, which is mainly composed of smart meters. The smart meters are connected to the communication server through the shielded twisted pair RS485 interface and the MODBUS communication protocol bus connection. The communication server reaches the monitoring host of the power distribution room for networking. Realize remote control.

3  系統功能 System Function

變電所實時監控系統圖為主監控畫面，主要實時監測變電所所有回路的運行狀態，紅色代表合閘，綠色代表分閘。在系統圖中可以直觀的看到每路進線和出線的運行參數和狀態，可以看到變壓器出線側的所有常規電力參數，如：三相電壓、電流、有功功率、無功功率、功率因數、頻率、有功電度等。如下圖所：

The real-time monitoring system diagram of the substation is the main monitoring screen, which mainly monitors the operating status of all circuits in the substation in real time. Red represents closing and green represents opening. In the system diagram, you can intuitively see the operating parameters and status of each incoming and outgoing line, and you can see all the conventional power parameters on the outlet side of the transformer, such as: three-phase voltage, current, active power, reactive power, and power factor , Frequency, active power, etc. As shown below:

遙信和遙測報警功能，主要完成對低壓各出線回路的開關運行狀態和負載進線監控，對開關變位和負載越限彈出報警界面指示具體的報警位置并聲音報警，提醒值班人員及時處理。負載越限值在相應權限下可自由設置。

The remote signaling and remote measurement alarm function mainly completes the monitoring of the switch operation status of the low-voltage outlet circuits and the load incoming line. The pop-up alarm interface for switch displacement and load limit violations indicates the specific alarm location and sounds the alarm to remind the duty personnel to deal with it in time. The load limit can be set freely under the corresponding authority.

事件告警記錄功能，主要完成對查詢時間段內出現的報警信息事件記錄以及發生時間，為值班人員提供依據并且分析事故發生的原因，如下圖所示：

The event alarm recording function mainly completes the recording of the alarm information and the occurrence time of the alarm information that occurred during the query period, and provides the basis for the duty personnel and analyzes the cause of the accident, as shown in the following figure:

報警功能實時查詢Alarm function real-time query

參數抄表功能，主要對低壓各出線回路的電參數進線查詢。支持任意時刻電參數查詢，具備數據導出和報表打印等功能。該報表查詢蒙牛乳業（當陽）有限公司低壓系統改造電力監控系統配電室進出線各低壓回路的電參數，主要包括：三相電流、有功功率和有功電度。該報表各回路名稱和數據庫關聯，方便用戶修改回路名稱。如下圖所示:

Parameter meter reading function, mainly to query the electrical parameters of the low-voltage outgoing circuit. Supports electrical parameter query at any time, with functions such as data export and report printing. This report queries the electrical parameters of the low-voltage circuits in and out of the power distribution room of the low-voltage system of Inner Mongolia Meng Niu Dairy (Group) Co., Ltd., which mainly includes three-phase current, active power and active power. Each circuit name of this report is associated with the database, which is convenient for users to modify the circuit name. As shown below:

電參數抄表Electric parameter meter reading

用電量報表功能，可選擇時間段進行查詢，支持任意時間段電度累計查詢，具備數據導出和報表打印等功能。為值班人員提供了準確可靠的電能報表。該報表各回路名稱和數據庫關聯，方便用戶修改回路名稱。如下圖所示，用戶可以直接打印報表，可以以EXCEL格式另存到其他位置。 如下圖所示：

Power consumption report function, select the time period for query, support the cumulative query of the power consumption at any time period, and have the functions of data export and report printing. Provide accurate and reliable electric energy report for the staff on duty. Each circuit name of this report is associated with the database, which is convenient for users to modify the circuit name. As shown in the figure below, the user can print the report directly, and save it to another location in EXCEL format. As shown below:

電能報表Energy report

系統通訊結構示意圖，主要顯示系統的組網結構，系統采用分層分布式結構，同時監測間隔層設備的通信狀態。紅色表示通訊正常，綠色表示通訊故障。下圖為變電所通訊狀態示意圖。

A schematic diagram of the system communication structure, which mainly shows the network structure of the system. The system adopts a hierarchical distributed structure and monitors the communication status of the bay layer equipment. Red means communication is normal, green means communication failure. The figure below is a schematic diagram of the communication status of the substation.

通訊結構示意圖Communication structure diagram

4  結束語Summary

在當今配電設施的應用中，項目的配電安全性至關重要，本文介紹的Acrel-2000電力監控系統在蒙牛乳業（當陽）有限公司的應用，可以實現對配電室供配電回路用電的實時監控，不僅能顯示回路用電狀況，還具有網絡通訊功能，可以與串口服務器、計算機等組成電力監控系統。系統實現對采集數據的分析、處理，實時顯示配電室內各配電回路的運行狀態，對負載越限具有彈出報警對話框、語音提示，并生成各種電能報表、分析曲線、圖形等，便于電能的遠程抄表以及分析、研究，該系統運行安全、可靠、穩定，為商業廣場項目解決用電問題提供了真實可靠的依據，取得了較好的企業效益。

In the application of today’s power distribution facilities, the power distribution safety of the project is very important. The application of the Acrel-2000 power monitoring system introduced in this article in Inner Mongolia Meng Niu Dairy (Group) Co., Ltd. can realize The real-time monitoring of power consumption can not only display the power consumption status of the loop, but also has the function of network communication, which can form a power monitoring system with serial server, computer, etc. The system realizes the analysis and processing of the collected data, real-time display of the operation status of the distribution circuits in the distribution room, pop-up alarm dialogs, voice prompts for load exceeding limits, and generates various electric energy reports, analysis curves, graphics, etc., which is convenient The remote meter reading, analysis and research of electric energy show that the system is safe, reliable and stable. It provides a true and reliable basis for the commercial plaza project to solve the electricity problem and has achieved good corporate benefits.

參考文獻 Bibliography

1.Solutions For Enterprise Micro-grid System 2020.02