蒙牛乳业有限公司变压器配电系统改造项目的应用

摘要：本文介绍蒙牛乳业（当阳）有限公司低压系统改造电力监控系统，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。系统采用现场就地组网的方式，组网后远传至后台，通过Acrel-2000型电力监控系统实现配电室配电回路用电的实时监控和管理。

随着社会经济发展、生产自动化程度的提高、劳动力的解放和生活质量的改善，大量电能驱动设备投入到生产、生活中，人们对电力的依赖程度越来越高。供电的可靠性、连续性已经成为整个社会关心的重要问题之一。由于供电系统具有产生和消费同时发生的特殊性，对整个供电过程进行监控，是保证供电可靠性和连续性的重要手段。

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.

 蒙牛乳业（当阳）有限公司位于湖北省当阳市，现场共有1个配电室。

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

 本次项目主要涉及蒙牛乳业（当阳）有限公司配电室内的网络多功能仪表、微机保护等设备，监控主机位于1层的值班室。

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

为保证生产管理用电负荷的统计与分析及对危险源实时监控。需要对项目现场的配电室中进线及出线回路进行电压、电流、功率等参数进行实时在线监控。一旦监控点被监视参数异常，能够及时检测报警，有关人员采取必要的措施，避免安全事故的发生。自动抄表功能节省了人力物力，功率趋势曲线功能能够直观的显示各回路的工作状态与时间，方便用户找出非正常用电回路并且及时进行整改，建立电能多级计量体系提供用能分析依据。

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  系统方案 Structure

安科瑞Acrel-2000系统根据蒙牛乳业（当阳）有限公司低压系统改造电力监控系统现场实际情况，整体网络结构采用屏蔽双绞线直接接至数据采集器然后将数据上至配电室的监控主机，保障了电力监控系统传输的稳定性与实时性。

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）站控管理层 Control Centre

站控管理层针对电力监控系统的管理人员，是人机交互的直接窗口。在蒙牛乳业（当阳）有限公司低压系统改造电力监控系统工程中主要指置于一层配电室的监控主机。

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）网络通讯层 Network

通讯层主要是由采集器、以太网设备及总线网络组成。串口服务器主要功能是监测现场智能仪表；以太网设备及总线网络的主要功能是实现分站与主站之间的数据交互，使配电系统管理集中化、信息化、智能化，很大提高了配电系统的安全性、可靠性和稳定性，达到了无人值守的目的。

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）现场设备层 Device

现场设备层是数据采集终端，主要由智能仪表组成，智能仪表通过屏蔽双绞线RS485接口，采用MODBUS通讯协议总线型连接接入通讯服务器，经通讯服务器到达该配电间监控主机进行组网，实现远程控制。

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.

 

系统结构图 System structure diagram

 

3  系统功能 System Function

变电所实时监控系统图为主监控画面，主要实时监测变电所所有回路的运行状态，红色代表合闸，绿色代表分闸。在系统图中可以直观的看到每路进线和出线的运行参数和状态，可以看到变压器出线侧的所有常规电力参数，如：三相电压、电流、有功功率、无功功率、功率因数、频率、有功电度等。如下图所：

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:

 

系统图 system diagram

 遥信和遥测报警功能，主要完成对低压各出线回路的开关运行状态和负载进线监控，对开关变位和负载越限弹出报警界面指示具体的报警位置并声音报警，提醒值班人员及时处理。负载越限值在相应权限下可自由设置。

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.

事件告警记录功能，主要完成对查询时间段内出现的报警信息事件记录以及发生时间，为值班人员提供依据并且分析事故发生的原因，如下图所示：

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:

              

 

报警功能实时查询Alarm function real-time query

 参数抄表功能，主要对低压各出线回路的电参数进线查询。支持任意时刻电参数查询，具备数据导出和报表打印等功能。该报表查询蒙牛乳业（当阳）有限公司低压系统改造电力监控系统配电室进出线各低压回路的电参数，主要包括：三相电流、有功功率和有功电度。该报表各回路名称和数据库关联，方便用户修改回路名称。如下图所示:

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:

 

 电参数抄表Electric parameter meter reading

 用电量报表功能，可选择时间段进行查询，支持任意时间段电度累计查询，具备数据导出和报表打印等功能。为值班人员提供了准确可靠的电能报表。该报表各回路名称和数据库关联，方便用户修改回路名称。如下图所示，用户可以直接打印报表，可以以EXCEL格式另存到其他位置。 如下图所示：

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: