Acrel-EMS enterprise microgrid energy efficiency management platform is applied in a 35kV substation of a food processing factory

Ankerui Huanan

Abstract: The daily operation and maintenance of 35 kV substations requires a lot of manpower and material resources. Usually, 35 kV substations are equipped with substation comprehensive automation systems and low-voltage power monitoring systems. The power grid energy efficiency management platform integrates the functions of measurement, control, protection and communication, which is the solution to the serious shortage of operation and maintenance resources. According to the needs of different hardware equipment management and monitoring, the Acrel-EMS enterprise microgrid energy efficiency management platform can On-site real-time addition, thereby simplifying the secondary wiring of substations and effectively reducing operation and maintenance costs, has more promotion and application value .

Key words: 35 kV substation; substation integrated automation system; Acrel-EMS; enterprise microgrid energy efficiency management platform

1. overview

The food processing plant substation project scale: voltage level: 35/10.5kV, planned main transformer capacity 1×6.3MVA+1 set of 8MVA. There is a general power distribution room, including 35kV switchgear , 10kV switchgear and 0.4kV power distribution cabinet , two independent transformer rooms, and the transformers are dry-type transformers . The 35kV power supply system adopts single-busbar wiring, and there are 4 high-voltage switchgear cabinets in total, with 1 incoming line, 2 transformer outgoing lines, and 1 PT interval. The 10kV power supply system adopts a single-bus section system, with 2 lines for incoming lines, 2 lines for capacitors, 2 lines for station transformers, 2 lines for PTs , 2 lines for sections, and 8 lines for outgoing lines . A total of 18 high-voltage switch cabinets .

According to the user's power distribution system management needs, it is necessary to monitor and protect the 35kV switchgear, 10kV switchgear, 35kV/10kV main transformer, AC and DC system, etc. in all aspects, so as to detect faults in time and ensure the reliable operation of the power distribution system.

Combined with the user's actual production process requirements, in order to realize the overall monitoring and management of the 35kV substation of this project, AM5SE series incoming line protection, main transformer protection and various outgoing line protection devices are configured in the 35kV and 10kV power distribution circuits; Configure APView500 power quality online monitoring device; configure ASD200 switch cabinet intelligent control device and AMC96L-E4 multi-function meter on each high-voltage switch cabinet; configure one AMC96L-E4 multi-function meter in each 0.4kV power distribution circuit .

A set of Acrel-1000 substation integrated automation system monitoring screen and a set of Acrel-2000Z power monitoring system monitoring screen are configured in the electrical monitoring room , and secondary equipment data such as microcomputer protection devices and power quality are collected in real time through the communication management machine and network switch to realize All aspects of power monitoring and automatic management of the power supply and distribution system of the entire plant . And configure a set of integrated power supply system to provide stable and reliable power supply for the operation of important equipment such as circuit breakers, secondary equipment and monitoring hosts in the entire substation. At the same time, the Acrel-EMS enterprise micro-grid energy efficiency management platform is used to summarize the data of the Acrel-1000 substation integrated automation system and the Acrel-2000Z power monitoring system platform, and simultaneously perform web publishing and mobile APP access, reducing the operation and maintenance inspection work of operation and maintenance personnel, and enriching Energy efficiency analysis can facilitate operation and maintenance personnel to troubleshoot energy consumption problems.

 

Figure 1 The site map of the food processing plant

 

Figure 2 Plan layout of 35kV substation in food processing plant

1. system structure

AcrelEMS enterprise micro-grid energy efficiency management platform adopts B/S architecture and integrates Acrel-1000 substation comprehensive automation system and Acrel- 2000Z power monitoring system. Monitoring, providing substation integrated self-system , power monitoring, power quality monitoring, electrical safety protection, power statistics. It is of great help to the enterprise's power consumption management .

System function requirements:

Substation integrated self-system: Monitor the power consumption of the 35kV medium and high voltage side of the enterprise through a system diagram, and the data are refreshed in real time.

Power monitoring: monitor the power consumption of the 0.4kV low-voltage side of the enterprise, provide power distribution room monitoring, reactive power compensation cabinet monitoring, power report and other functions.

Power quality: Provide steady-state monitoring, harmonic spectrum, steady-state curve, harmonic curve, SOE event and other parameters of the power quality detector.

Electric energy statistics: Provide functions such as centralized reading of electricity consumption, electricity consumption statistics, electricity consumption statistics by time period, comparison analysis of electricity consumption, group electricity consumption statistics, etc.

The substation integrated automation system refers to the combination of some interrelated units that achieve a given goal by performing specified functions. The substation integrated automation system uses advanced computer technology, modern electronic technology, communication technology and information processing technology to achieve The functions of the secondary equipment in the substation are recombined and optimized to design, monitor and measure the operation of all equipment in the substation, and upload the main data to the local dispatching platform, and accept the control instructions from the dispatching end to realize power regulation in the station.

The substation integrated automation system and power monitoring system can be divided into three layers: the field device layer, the network communication layer and the platform management layer.

On-site equipment layer: including microcomputer protection, intelligent control, multi-function instruments, meters and other equipment, used to collect data such as electrical operating parameters, switch status, and electrical contact temperature in the power distribution cabinet in the station. Multiple sets of DC power supplies are configured to ensure a good operating environment for on-site equipment.

Network communication layer: including ANet-2E8S intelligent gateway. The gateway actively collects the data of the field device layer equipment, and can perform protocol conversion, data storage, and disperse the 10kV substation through the data acquisition box (built-in intelligent gateway) to collect data and upload it to the communication room substation integrated automation monitoring system platform through optical fiber; at the same time, the gateway acts as a remote The mobile communication device collects the field equipment data and uploads it to the dispatching network after being encrypted by the vertically encrypted data through the switch.

Platform management: lSubstation integrated automation monitoring system platform, power monitoring system platform, enterprise microgrid energy efficiency management platform.

 

Figure 3 Network structure diagram of monitoring system

1. solution
   1. Program overview

This project is equipped with AM5SE series microcomputer protection devices in the 35kV and 10kV power distribution systems. The 35kV main transformer is equipped with a complete set of main transformer protection screens to realize differential protection, backup protection, non-electrical protection and temperature monitoring of the main transformer. ; Other 35kV circuits and 10kV circuits are equipped with AM5SE series microcomputer protection devices on site.

 

Figure 4 35kV switchgear scene diagram

 

Figure 5 10kV switchgear scene diagram

A set of integrated power supply system is configured in the electrical monitoring room to provide stable and reliable power supply for the operation of important equipment such as circuit breakers, secondary equipment, and monitoring hosts in the entire substation.

A clock synchronization screen is configured in the electrical monitoring room to realize the clock synchronization of all microcomputer protection devices in the substation.

A public measurement and control panel is installed in the electrical monitoring room to realize the monitoring of the power quality of the total incoming line in the substation; the telemetry of analog quantities such as the 35kV side bus voltage/10kV side substation transformer voltage; remote signaling such as abnormal signals of the microcomputer protection device.

A set of substation comprehensive automation system is configured in the electrical monitoring room, and the substation comprehensive automation monitoring and management is realized through the communication management machine.

A set of microcomputer five-proof monitoring system is configured in the electrical monitoring room, mechanical five-proof locks and electrical five-proof locks are installed in 35kV and 10kV switch cabinets, and the five-proof operation locking function of all station equipment is realized through the five-proof system. Perform operation rehearsal on the five-defense workstation, check, print and transmit operation tickets, and implement five-defense mandatory locking for primary equipment.

A metering screen is configured in the electrical monitoring room to realize total electric energy metering and main transformer electric energy metering in the station.

 

Figure 6 Layout renderings of screen cabinets in the electrical monitoring room

There is one 35kV substation and three regional substations. The 35kV substation is an independent two-story building. The first floor is a 35kV switch room, 35kV transformer room, and 10kV switch room, and the second floor is a 10kV transformer and 0.4kV switch . room, communication room. The regional substation is an independent area on the first floor of the equipment building, equipped with 10kV switch cabinets, transformers and 0.4kV low-voltage cabinets. .

The primary system diagram of the 35kV switch room in the 35kV substation is shown in Figure 1. There are 4 switch cabinets in total, namely: 1 incoming line cabinet, 1 outgoing line cabinet, 1 metering cabinet, and 1 PT cabinet.

 

Figure 3 Primary system diagram of 35kV switch room

The primary system diagram of the 10k switch room in the 35kV substation is shown in Figure 2. There are 16 switch cabinets in total, including 2 10kV incoming line cabinets, 9 transformer outgoing line cabinets (including 3 spare outgoing line cabinets), 1 bus connection cabinet, 1 isolation cabinet, 2 PT cabinets, 1 metering cabinet.

 

 

Figure 4 Primary system diagram of 10kV switch room

 

Fig. 5 Primary system diagram of the incoming line cabinet of each decentralized 10kV substation

1. 1. Functional Requirements
      1. 35kV monitoring and protection scheme

1) 35kV incoming line protection:

The 35kV incoming cabinet is equipped with a line protection AM5SE-F. When the circuit fails, it is used to trip the circuit breaker of the cabinet to cut off the fault.

2) 35kV/10kV main transformer protection:

This project has 35kV main transformer outlet cabinets on both sides of 1# and 2#. The whole set of main transformer protection devices is centralized and screened, and 2 main transformer protection screens are configured. The screen cabinet is set up in the electrical monitoring room, and each screen cabinet is equipped with 1 differential protection device AM5SE-D2, 1 high backup protection device AM5SE-TB, 1 low backup protection device AM5SE-TB, and 1 high side measurement and control device AM5SE-K, 1 low-side measurement and control device AM5SE-K, 1 transformer temperature controller ARTM-8, transfer switch, pressure plate, air switch and other control equipment.

 

Differential protection device: as the main protection for the short-circuit fault inside the main transformer and the lead wires, it will trip the circuit breakers on both sides of the main transformer after the action;

High backup protection device: as the backup protection of the 35kV side and the non-electrical protection of the transformer, it trips the circuit breakers on the high and low sides of the main transformer after the action;

Low back-up protection device: as a back-up protection on the 10kV side, it trips the circuit breakers on the high and low sides of the main transformer after the action;

High-side measurement and control device: used to monitor the 35kV side measurement current and measurement voltage;

Low-side measurement and control device: used to monitor the 10kV side to measure current and measure voltage;

Transformer thermostat: monitor the internal winding temperature of the main transformer;

3) 35kV PT protection:

The PT cabinet is equipped with a PT parallel and monitoring device AM5SE-UB to realize the PT monitoring function. When the circuit voltage is abnormal, an alarm signal will be sent in time.

4) Comprehensive measurement and control of 35kV switchgear

Each 35kV switchgear is equipped with an intelligent control device ASD200, which realizes comprehensive measurement and control of the switch state, temperature and humidity in the high-voltage switchgear.

1. 1. 1. 10kV monitoring and protection scheme

1) 10kV incoming line protection:

Each 10kV incoming cabinet is equipped with a line protection AM5SE-F. When the circuit fails, it is used to trip the circuit breaker of the cabinet to cut off the fault.

2 ) 10kV outgoing line protection:

Each 10kV outlet cabinet is equipped with a line protection AM5SE-F. When the circuit fails, it is used to trip the circuit breaker of the cabinet to cut off the fault.

3 ) 10kV transformer cabinet protection:

Each 10kV transformer cabinet is equipped with a transformer protection device AM5SE-T. When the circuit fails, it is used to trip the circuit breaker of the cabinet and cut off the fault.

4 ) 10kV capacitor protection:

The 10kV capacitor cabinet is equipped with a capacitor protection device AM5SE-C. When the circuit fails, it is used to trip the circuit breaker of the cabinet and cut off the fault.

5 ) 10kV bus tie protection

The bus coupler cabinet is equipped with a backup automatic switching protection device AM5SE-B, which is used to realize automatic switching between the two incoming lines and the bus coupler (incoming line backup automatic switching/bus connection backup automatic switching/connection switching backup automatic switching/automatic switching) To adapt to standby self-injection), while realizing the bus tie protection function.

6 ) 10kV PT monitoring

The PT cabinet is equipped with a PT monitoring parallel device AM5SE-UB to realize the switching and monitoring between the two PT cabinets. When the loop voltage is abnormal, an alarm signal will be sent in time.

7) Comprehensive measurement and control of 10kV switchgear

Each 10kV switchgear is equipped with an intelligent control device ASD200, which realizes comprehensive measurement and control of the switch state, temperature and humidity in the high-voltage switchgear.

1. AMC96 multi-function meter

Each 10V switchgear is equipped with a multi-function meter AMC96L-E4 to monitor the current, voltage and other electrical parameters of each switchgear in real time.

1. 1. 0.4kV Power Distribution Room Monitoring Solution

The 0.4kV power distribution cabinet is equipped with 35 AMC96L-E4 meters and 76 AMC72L-E4 meters. The 0.4kV power monitoring system realizes the functions of data collection, operation monitoring and power metering of the 0.4kV power distribution circuit by connecting to the above-mentioned AMC series multifunctional power meters.

1. 1. Microcomputer five-proof locking scheme

For 35kV and 10kV switchgear, each circuit breaker is equipped with a five-proof electric lock, and each handcart includes a circuit breaker handcart, PT handcart, and isolation handcart, and a set of handcart locking kits, according to the number of handcarts. Double-configure the locking kit in the cabinet, and configure a grounding knife locking kit for each grounding knife and isolation knife, and configure the grounding head (configured according to half the number of cabinets). 4 five-proof unlocking keys, 2 chargers, 2 computer keys, 1 microcomputer five-proof host, and a set of microcomputer five-proof software.

1. 1. Clock Synchronization Scheme

Configure a clock synchronization device ATS1200GB, which is placed on the clock synchronization screen in the electrical monitoring room. The clock source supports GPS and Beidou. The monitoring system, communication management machine and microcomputer protection device all obtain timing (time synchronization) signals from the device to ensure that the time synchronization of the I/O data acquisition unit meets the 1ms precision requirement. When the clock loses synchronization, it automatically alarms and records the event, and when the clock loses power, it automatically generates an alarm signal. The monitoring system equipment adopts the NTP time synchronization method, and the time synchronization interface of the microcomputer protection device adopts the IRIG-B time synchronization method.

 

1. 1. Public measurement and control scheme

On one side of the public measurement and control screen, two AM5SE-K public measurement and control devices and one APView500 power quality monitoring device are placed. 2 sets of AM5SE-K respectively collect the 35kV side bus voltage/10kV side station voltage in the station, and the abnormal signals of each microcomputer protection device

; And reserve 4 remote control exits. And configure a power quality monitoring device APView500 to monitor power quality such as voltage harmonics and unbalance/voltage deviation/frequency deviation/voltage fluctuation and flicker and other steady-state data, voltage swell/sag/short-time interruption transient data , when abnormal power quality is detected, fault recording and data recording will be triggered to provide data support for subsequent power quality analysis.

 

1. 1. Integrated Power Solution

This project provides integrated power supply for the monitoring equipment in the power distribution room. The specific configuration scheme is as follows:

DC cabinet GZDWJM-100/200-M , storage battery cabinet, UPS power cabinet, AC screen, AC feeder cabinet, emergency lighting cabinet, DC power screen GZDWJM-40/110-M (1 set, 1 screen) on each side. Provide stable and reliable power supply for the operation of important equipment such as circuit breakers, secondary equipment, and monitoring hosts in the entire substation.

1. 1. Substation Integrated Automation System Scheme

Set 35-10kV substation comprehensive automatic monitoring screen 1, communication management machine 2, 1 telecontrol device. Realize the data collection of 35kV and 10kV switchgear microcomputer protection devices, measurement and control devices, DC screens and other intelligent equipment. Realize relevant functions such as telemetry, remote signaling, remote control, alarm, report, operation ticket, anti-misoperation of the substation, and realize data collection and real-time monitoring in the substation. The single-network networking method realizes data collection and real-time monitoring in the substation. The single-network networking method realizes data collection and real-time monitoring in the substation.

 

1. 1. Metering screen scheme

The metering screen of this project is equipped with a DTZ1296 three-phase four-wire system, active power 0.2S, reactive power 2.0, 3×57.7/100V, 3×1.5(6)A watt-hour meter for measurement at the incoming line, two DTZ1296 three-phase Four-wire system, active power 0.2S, reactive power 2.0, 3×57.7/100V, 3×1.5(6)A watt-hour meters are used for measurement at the main transformer, a FK G A23 special transformer acquisition terminal (with Ethernet port , 4G communication) , upload the data of the watt-hour meter to the dispatching platform and monitoring system through the electric energy collection terminal.

1. 1. Telecontrol Communication Solution

Configure a dispatching data network screen in the electrical monitoring room, configure II-type network security monitoring device PSSEM-2000S, router AR6140-S, switch SG1528A-S2-24T-ST, NetKeeper-2000 (100M type) longitudinal encryption authentication device (100M) mega-type), and send telecontrol information to dispatchers at all levels through the dedicated channel point-to-point mode and the data network access equipment in the station.

1. 1. 0.4kV power monitoring screen

Set one side of 0.4kV power monitoring screen. Data collection for low-voltage multi-function instruments. Realize the remote measurement, remote signaling, remote control, alarm, report and other related functions of the low-voltage multi-function instrument to realize data collection and real-time monitoring in the substation. Realize data collection, operation monitoring, accident recording and analysis, relay protection, etc. during the operation of the power supply and distribution system, and complete the safe power supply, power consumption management and operation management of the enterprise.

 

1. telemetry
2. 1. Configure device scheme

Table 1 List of equipment provided by our company

name	model	picture	Function
Enterprise Microgrid Energy Efficiency Management Platform	Acrel-EMS		Divide the power consumption of the enterprise into source, network, load, storage, and charging, which can monitor the overall power consumption status of the enterprise, realize the overall monitoring from the 35kV power distribution to the 0.4kV power consumption side, and provide substation integrated self-system, power monitoring, power Quality monitoring, electrical safety protection, and centralized display of electric energy statistics do not require various subsystems, which is convenient for managers to better maintain the enterprise and greatly helps the enterprise's electricity management.
35kV Substation Integrated Automation System	Acrel- 1000		It can display the main wiring diagram of the substation, simulate the operation of the power distribution network, and realize the unattended mode; according to the sequential event records, historical curves, and fault recordings, it can assist the operation and maintenance personnel to quickly analyze, locate and troubleshoot problems, and shorten the power outage time as much as possible; Real-time collection of parameters such as current, voltage, power, electric energy, harmonics, and voltage fluctuations of each circuit and equipment, and energy consumption analysis and energy efficiency management for power distribution systems and electrical equipment
0.4kV power monitoring system	Acrel- 2000Z		Data collection for low-voltage multi-function instruments. Realize the telemetry, remote signaling, remote control, alarm, report and other related functions of the low-voltage multi-function instrument, realize data collection and real-time monitoring in the substation, display the specific location of each substation through the map, and display the current number of alarms and specific information, and display the low-voltage substation The meter reading value, demand value and occurrence time of each electric parameter at the selected time node of the loop. Realize the data collection, operation monitoring, accident record and analysis of the power supply and distribution system during operation, and complete the enterprise's safe power supply, power consumption management and operation management.
gateway	ANet- 2E8S1		8路RS485串口，光耦隔离，2路以太网接口，支持ModbusRtu、ModbusTCP、DL/T645-1997、DL/T645-2007、CJT188-2004、OPC  UA等协议的数据接入，ModbusTCP（主、从）、104（主、从）、建筑能耗、SNMP、MQTT 等协议上传，支持断点续传、XML、JSON进行数据传输、支持标准8GB SD卡（32GB）、支持不同协议向多平台转发数据；每个设备的多个报警设置。输入电源：AC/DC 220V，导轨式安装。
35kV/10kV/6kV 进线柜电能质量 在线监测	APView500		相电压电流＋零序电压零序电流，电压电流不平衡度，有功无功功率及电能、事件告警及故障录波，谐波（电压/电流63次谐波、63组间谐波、谐波相角、谐波含有率、谐波功率、谐波畸变率、K因子）、波动/闪变、电压暂升、电压暂降、电压瞬态、电压中断、1024点波形采样、触发及定时录波，波形实时显示及故障波形查看，PQDIF格式文件存储，内存32G，16D0＋22D1，通讯2RS485＋1RS232＋1GPS，3以太网接口（＋1维护网口），支持61850协议。
35kV/100kV/6kV 间隔智能操控、 节点测温	ASD500		5寸大液晶彩屏动态显示一次模拟图及弹簧储能指示、高压带电显示及闭锁、验电、核相、3路温温度控制及显示、远方/就地、分合闸、储能旋钮预分预合闪光指示、分合闸完好指示、分合闸回路电压测量、人体感应、柜内照明控制、1路以太网、2路RS485、1路USB接口、GPS对时、高压柜内电气接点无线测温、全电参量测温、脉冲输出、4～20mA输出；
35kV/10kV/ 6kV传感器	ATE400		合金片固定，CT感应取电，启动电流大于5A，测温范围-50-125℃，测量精度±1℃；无线传输距离空旷150米；
35kV/10kV/0.4kV 间隔电参量测量	APM830		三相（1、U、kW、kvar、kWh、kvarh、Hz、cosΦ），零序电流In，四象限电能，实时及需量，本月和上月值，电流、电压不平衡度，66种报警类型及外部事件（SOE）各16条事件记录，支持SD卡扩展记录，2-63次谐波，2D1＋2D0，RS485/Modbus，LCD显示；
变压器绕组 温度检测	ARTM-8		8路温度巡检，预埋PT100，RS485接口，2路继电器输出；

应用场合	型号	图 片	保护功能	其他功能
35kV/10kV/ 6kV进线	AM5SE-F		三段式过流保护（带方向、低压闭锁）、过负荷保护、PT断线告警、逆功率保护、三相一次重合闸、低频减载、检同期、合环保护、断路器失灵保护；	操作回路、 双以太网口、 双485口、 2路4-20mA变 送输出、 故障录波、 GPS对时、 全电量测量 直流量测量
35kV/10kV/ 6kV馈线	AM5SE-F		三段式过流保护（带方向、低压闭锁）、过负荷保护、PT断线告警、逆功率保护、三相一次重合闸、低频减载、检同期、合环保护、断路器失灵保护；
35kV主变 （2000kVA以上）	AM5SE-D2		两圈变/三圈变差动速断保护、比例制动差动保护；
	AM5SE-TB		变压器后备保护测控、三段式过流保护（带方向、复合电压闭锁）、非电量保护、启动通风保护、PT断线告警、遥调升档、遥调降档、遥调急停；
35kV/10kV/ 6kV厂用变	AM5SE-T		三段式过流保护（带方向、复合电压闭锁）、零序过流、过负荷保护（告警/跳闸）、控故障告警、PT断线告警、非电量保护；
35kV/10kV/6kV PT监测	AM5SE-UB		PT并列/解列、PT监测；
10kV/6kV 电容器	AM5SE-C		两段式过流/零序过流保护、过负荷保护（告警/跳闸）、PT断线告警、过电压/欠电压跳闸、不平衡电压/电流保护；
35kV/10kV/ 6kV母联	AM5SE-B		两进线备投/母联备投/自适应备投、联切备投、三段式过流保护（带方向、复合电压闭锁）、PT断线告警、过负荷联切/告警、检同期、合环保护；

1. 系统功能
   1. 实时监测
      1. 综合看板

系统提供低压配电监测大面板，提供变电站和光伏电站运行情况展示，通过地图显示各电站具体位置，并展示目前告警数目和具体信息。

1. 地图支持放大缩小且响应迅速。
2. 报警信息支持轮播功能。

 

1. 1. 1. 35kV配电系统

系统提供35kV/10kV一次系统图展示全站电气主接线图（支持缩放方式）包括显示设备运行状态、各主要电气量(电流、电压、频率、有功、无功)等的实时值。

 

图 35kV变电站综合自动化系统界面图

1. 1. 1. 变电所运行看板

展示单个变电站运行状况，并提供系统一次图。

1. 变电站基础信息维护，包括变压等级，装机容量，申报需量，变压器数量等。
2. 提供变电所实时负荷曲线查询，数据实时刷新。
3. 提供变电站分时段用电今日昨日对比柱状图。
4. 提供低压侧系统一次图，数据实时刷新。

 

图 企业微电网能效管理平台变电所运行看板界面图

1. 1. 1. 直流屏监测

提供直流屏遥测数据，一/二路交流电压监测。

 

图 企业微电网能效管理平台直流屏监测界面图

1. 1. 1.  变压器监测

展示所选变压器实时负载率，频率，三相电压电流，三相绕组温度，电压/电流不平衡度。提供负载率、有功功率、无功功率曲线。如图7.3.6所示。

1. 数据实时刷新，响应迅速。
2. 支持三相功率曲线同时展示。

 

图 企业微电网能效管理平台变压器监测界面图

1. 1. 1. 电能质量稳态监测

提供电能质量检测仪所采集数据，如电压有效值，偏差率，谐波畸变率，电流有效值，分相功率，总功率等。如图7.4.2所示。

1. 数据实时刷新，响应迅速。

 

图 企业微电网能效管理平台电能质量稳态检测界面图

1. 1. 1.  电能质量谐波监测

通过柱状图展示电能质量检测仪谐波和间谐波各频谱。如图7.4.3所示。

 

图 企业微电网能效管理平台电能质量谐波检测界面图

1. 1. 数据采集和存储
      1. 数据采集和处理

 

图 数据采集界面图

监控系统通过通信管理机实时采集模拟量、状态量等信息量；通过公共接口设备接受来自其他通信装置的数据，具有单独配置通信采集点信息的模块，不与数据库等其它部分相关联，并独立运行。

对所采集的实时信息进行数字滤波、合理性检查，工程值转换、信号接点抖动减除、刻度计算、人工置入等加工。从而提供电流、电压、有功功率、无功功率、功率因数等各种实时数据，并将这些实时数据带品质描述传送至站控层和各级调度中心。

1. 1. 1. 数据库的建立与维护

 

图 数据库建立与维护界面图

 数据库分为实时数据库和历史数据库，实时数据库存储监控系统采集的实时数据，其数值根据运行工况的实时变化而不断更新，记录被监控设备的当前状态；历史数据库对于需要长期保存的重要数据将存放在历史数据库中。提供通用数据库，记录周期为1min、5min、30min、60min任意调节。历史数据实现在线滚动存储5年，无需人工干预。所有的历史数据转存到光盘或磁带等大容量存储设备上作为长期存档。对于状态量变位、事件、模拟量越限等信息，按时间顺序分类保存在历史事件库中，并保存10年，以供查询。

1. 1. 调节与控制

 

图 变电站综自系统调节与控制界面图

操作员对需要控制的电气设备进行控制操作。监控系统具有操作监护功能，允许监护人员在操作员工作站上实施监护，避免误操作。

原则上间隔层控制和设备就地控制作为后备操作或检修操作手段。为防止误操作，在任何控制方式下都需采用分步操作，即选择、返校、执行，并在站级层设置操作员、监护员口令及线路代码，以确保操作的安全性和正确性。对任何操作方式，保证只有在上一次操作步骤完成后，才进行下一步操作。同一时间只允许一种控制方式合理。

纳入控制的设备有：

a） 35kV及以下断路器；

b） 35kV及以下隔离开关及带电动机构的接地开关；

c） 站用电380V断路器；

d） 主变压器分接头；

e）继电保护装置的远方复归及远方投退连接片。

1. 1. 微机五防闭锁

 

图 变电站综自系统微机五防界面图

具备全站五防闭锁功能。具有防止误拉、合断路器；防止带负荷拉、合开关；防止带电挂接地线；防止带地线送电；防止误入带电间隔的功能。

配置独立于监控系统的专用微机五防系统。远方操作时通过专用微机五防系统实现全站的五防操作闭锁功能，就地操作时则由电脑钥匙和锁具来实现，同时在受控设备的操作回路中串接本间隔的闭锁回路。专用微机五防系统与变电站监控系统共享采集的各种实时数据，不独立采集信息，采用相互通信的间隔层测控装置实现。

1. 1. 系统运行
      1. 仪表通讯状态

仪表通讯状态主要用于监测目标站点的仪表设备数据是否正常交互、是否有离线发生、何时离线与数据交互中断的持续时间等内容，为用户初步判断设备通讯问题提供依据。

 

图 企业微电网能效管理平台设备通信界面图

1. 1. 1. 网关通讯状态

网关通讯状态主要用于监测目标站点的网关设备数据是否正常交互、是否有离线发生、何时离线，为用户初步判断网关通讯问题提供依据。

 

图 企业微电网能效管理平台网关通信状态界面图

1. 结语

Acrel-EMS企业微电网能耗管理平台解决方案，通过一个平台即可整体对用电进行集中监控、统一调度、统一运维，满足用户可靠、安全、节约、合理、有序用电的要求。对用户提供运维服务，实现能源互联，信息互通，打破信息孤岛；根据用电设备负荷重要性分级管理，错峰有序用电，提高运维人员的技能，保证电网安全稳定运行。