With the rapid development of the power industry, power system monitoring has entered an era of intelligence, networking, and digitization. This paper introduces the application of Acrel-2000 power monitoring and power management software based on network power meter in Zhonghai Fuhuali power distribution monitoring. The system realizes intelligent, digital and networked power management for distributed acquisition and centralized control management.
Yang Junjun
Ankerui Electric Co., Ltd., Shanghai Jiading
1 Project Overview
Fuhuali is a city center complex of 240,000 square meters. It integrates the world's top 500 Accor international brand hotels, landmark twin tower office buildings, nearly 50,000 square meters of international block business and international boutique apartments. The project occupies the core position of the future Gongbei business center. It is the first project of the Gongbei Business Center in the three old renovations of Zhuhai, and it is the planned CBD.
The project power distribution system is divided into four power distribution areas, namely, switch house, 1# high and low voltage power distribution station, 2# high and low voltage power distribution station, and 3# high and low voltage power distribution station. The substations are distributed throughout the commercial basement; the entire distribution system has a total of 588 low-voltage feed-out circuits, more than 20 medium-voltage feed-out circuits, and all outlet circuits are equipped with network multi-function power meters PZ80-E4/KC , 10KV in and out line and the mother cabinet to install the microcomputer integrated protection device. Monitor and protect the operation of the entire distribution system.
2 User requirements
The power distribution room is relatively dispersed. In order to facilitate centralized management of the entire power distribution system, the power supply system requires a stable and reliable power monitoring to realize real-time monitoring of the meter data and realize the power supply loops for the entire substation. Monitoring of electricity usage.
3 design plan
3.1 System Structure
The entire system adopts a set of Acrel2000 power management/power monitoring system, which adopts layered and distributed structure, namely field equipment layer, network management layer and monitoring management layer.
The field device is used to collect the operating parameters of each loop power system, including telemetry information such as current, voltage and power. The network management layer mainly includes communication management machine, photoelectric conversion equipment, switch, etc., responsible for data uploading and command release; monitoring management For the core of the entire system, the storage of all data, the display of the operating status of the power system, and the release of control commands are all completed through this part.
The main functions are one main wiring diagram interface display; event recording, system operation abnormal monitoring; fault alarm and operation record; power report query and printing; system load query, user authority management and other main functions; telemetry information report query.
The network structure of the entire system is shown in Figure 1:
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figure 1
The monitoring center of the whole system is located in the duty room of the switch. The data collection is mainly divided into 4 parts, namely the opening and closing station, 1# power distribution station, 2# power distribution station, 3# power distribution station, among which 1# power distribution room power The instrument transmits the signal to the intelligent communication management machine in the communication control box of 1# distribution room through the shielded twisted pair cable; 2# power distribution room power meter signal is transmitted to the 2# power distribution room communication through 485 bus mode The communication management machine in the control box. 3# Power distribution room power meter signal is transmitted to the intelligent communication management machine in the communication control box of 3# power distribution room through 485 bus. 1#, 2#, 3# intelligent communication management machines are connected to the background of the switch through optical fiber and photoelectric converter, and set up a dedicated local area network for power monitoring system to complete data transmission.
3.2 Software Design
Acrel-2000 power monitoring software is a special software for collecting and managing energy data of field instruments. The system is an intelligent network energy management system. The system integrates computer network, communication, database, numerical processing and other modern information technologies. It is the foundation and an important part of the power system. The software configuration is flexible, practical, easy to operate, easy to maintain and scalable. It provides a good user development interface and simple engineering implementation method, which can meet the energy-saving requirements of enterprises, and can utilize network communication and IT information processing technology to effectively strengthen the internal management of enterprises and improve the speed and accuracy of scientific management decision-making of enterprises. degree.
3.2.1 Distribution monitoring interface
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Data collection mainly includes analog quantity and digital quantity acquisition. The analog acquisition is mainly to collect the line voltage, current, power, power factor, frequency and other information. The collection of the switch quantity is mainly the working state of the circuit breaker, the isolating switch, the grounding knife and other equipment, and the power failure protection. The alarm information such as running faults is collected to realize local real-time display of remote data. The data processing mainly displays the electric parameters collected as required in real time to the user, and achieves the automation and intelligent requirements of the power distribution monitoring, and simultaneously stores the collected data into the database for the user to inquire.
3.2.2 Communication status
When you see the distributed network structure of the whole system, you can monitor the network communication status of the system in real time. When a network failure occurs, the system automatically displays the faulty line and the specific unit. Hardware Business Network Information Center)http://news.chinawj.com.cn
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