Hangzheng Storage [2007] No. 74 plot Wantong Center Power Monitoring System
This paper introduces the application of Acrel-3000 power monitoring and power management software based on network power meter in the distribution monitoring of Hangzhou Wantong Center. The system realizes intelligent, digital and networked power management for distributed acquisition and centralized control management. Glow In The Dark Pebbles,Glow In The Dark Rocks,Glow In The Dark Roads,Photoluminescent Gravel JINAN REALGLOW CO.,LTD , https://www.realglowsign.com
Yang Junjun
Ankerui Electric Co., Ltd. Shanghai Jiading
1. Project overview and construction goals
Hangzhou Wantong Center (Hangzheng Chuan [2007] No. 74 plot) is located in the Canal Business District, and is planned to be the sub-center of Hangzhou Chengbei City. The whole project consists of two parts, commercial and office buildings, with a total commercial building area of ​​approximately 65,500 square meters. Meter (including above ground and B1 floor); the floor area of ​​the office building is not less than 36,500 square meters. The distribution system of the whole project includes four 10kV total incoming lines, two of which are located in the 5kV switch station of 5# power distribution room, and the other two The road is located at the 10kV switch station of the 2# power distribution room. 1#, 3#, 5# distribution room 0.4kV incoming line is quoted from 5#V10 switch station of 5# power distribution room, and 0.4kV line of 2#, 4# power distribution room is taken from 2#VV switch station of 2# power distribution room.
Through the multi-functional power monitoring device, communication network and computer software, Vantone Center Power Distribution System realizes data collection, operation monitoring, accident warning, accident record and analysis, power quality detection, and three in the operation process of building power supply and distribution system. Phase imbalance monitoring, relay protection, etc., complete the building's safe power supply, power management, equipment management and operation management. The whole monitoring system consists of the main control layer, the communication management layer and the on-site control layer. The system requires that the devices that collect data centrally be minimized to ensure the communication reliability of the system.
The specific monitoring requirements mainly include the following aspects:
1) Data acquisition and processing: real-time collection of various analog quantities, switching quantities, etc. through the interval layer unit;
2) Statistical calculation: statistical, analysis and calculation of real-time data, generating the voltage qualification rate, active, reactive power, current, total load, power factor, power daily/month/year maximum, minimum and time necessary for the user , date, load rate, digital input state quantity logic operation value, etc.;
3) Screen display: position status, displacement information, protection device action and reset information of all devices, information of DC system and variable system used, real-time data of each measured value, various alarm information, status information of computer monitoring system;
4) Recording function: It has a memory function for various historical data, which can be queried, reviewed and printed at any time.
5) Alarm processing: Users can classify and filter alarms according to their own wishes, and classify alarms into different alarm windows. According to different alarm levels, alarms are used to launch screens, light displays, stripe flickers and different sound levels. ;
6) Maintenance function: The system should have a complete maintenance function, allowing the system management engineer to diagnose, manage, maintain and expand the system online;
7) It should have perfect user management functions to avoid unauthorized operation;
8) Historical curve display: can display any analog quantity, electrical measurement and historical waveform diagram of the bus voltage stored in the historical database at any time;
9) Report printing function: callable printing, timed printing of various historical data, operating parameters, electrical measurement report, voltage qualification rate statistics, accident report statistics, flat, peak, valley electricity measurement statistical report, main wiring diagram, load curve Regularly print class reports, daily reports, monthly reports and annual reports;
2 Design of power monitoring system
In the design of the monitoring system, it is necessary to fully consider the characteristics of the building, the actual structure of the power system, the actual load capacity of the power system, etc., and then rationally select the monitoring equipment, which is beneficial to reduce the cost of the system operation, and also has Conducive to the realization of system functions.
The power monitoring system of this project can realize real-time monitoring of the high and low voltage distribution circuits of Wantong Center, which is conducive to power management. On the other hand, the power monitoring system can not only accurately indicate the power consumption status of the circuit, but also has the functions of network communication, etc., and can be combined with computers, serial servers and other devices to display the operation status of each power distribution circuit in time. When the load of the equipment power system is higher, the power monitoring system can quickly alarm and issue a voice prompt. In addition, the power monitoring system can also generate statistical information such as reports and graphs, so that relevant personnel can analyze the power consumption status of various parts in the building, and make the electricity activities in the building more secure, thus ensuring the safety of the people in the building and improving the office. Staff efficiency.
2.1 System Structure
The system adopts a layered and distributed system structure, which is vertically divided into three layers: the monitoring layer, the communication network layer, and the field control layer. The system uses high-reliability industrial control computer and software and hardware systems, high-performance fieldbus technology and network communication technology. The whole system runs safely, stably and reliably, and is easy to use and maintain.
The monitoring layer includes engineering station and telecontrol communication station, including monitoring computer, network switch, printer, UPS and Acrel-2000 power monitoring software. It is located in the substation control room as a human-computer interaction window for dispatching, operation and professional. The system monitors the operation status of the system in real time by means of graphic display, report printing, audible alarm, etc., and controls the control of the control unit to complete the "four remote" function of the system.
The communication network layer includes communication servers, photoelectric converters, data acquisition boxes, and communication optical networks. The network structure is shown in the following figure: .jpg)
2.2 Main design reference standards
GBT 14598.300-2008 "General technical requirements for microcomputer transformer protection devices"
DL/T 5430-2009 "Technical Regulations for Design of Remote Monitoring Center for Unattended Substation"
GB/T 50063-2008 "Design specifications for electrical measuring instrumentation of electrical installations"
"18 major power grid major anti-accident measures of State Grid Corporation"
DL 448-91 "Management Regulations for Electric Energy Metering Devices"
ISO/IEC11801 "International Integrated Cabling Standards"
2.3 Monitoring system software function design
The system is designed according to the actual needs of the customer, and realizes a main wiring diagram interface display; electrical parameter telemetry and electrical parameter over-limit alarm; event record; system operation abnormal monitoring; fault alarm and operation record; report query and printing; system load real-time Main functions such as history curve and user rights management.
Data collection and processing
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. .jpg)
data record
The data recording function of the power monitoring system is mainly to record the switching state of the circuit breaker and the sequence of protection actions. It requires sufficient memory space in the system, so that the data information is recorded and stored for a long time. Secondly, the data recording function of the power monitoring system also includes recording of fault information, that is, recording and storing data such as real-time current and real-time voltage at the time of occurrence of the fault. It can be seen that the data recording function can accurately reflect the problems existing in the system by recording the working state of the protection device and recording the fault information, thereby facilitating the staff to solve. .jpg)
Remote operation
The remote operation of the power monitoring system includes remote monitoring, remote communication, remote control and other links to realize remote control of the power system, enabling the staff to remotely observe the current, voltage and other information, analyze the system failure, and protect the device. The status is evaluated, which makes it easier for the staff to operate the equipment such as the isolating switch remotely, which greatly reduces the workload of the staff. However, in the power supply and distribution design, not only the power monitoring system but also the manual operating system must be designed. When the power monitoring system fails, it can be processed manually.
Power management
In order to realize the supervision of the power consumption of each channel of the Wantong Center, the system designed the electricity management report. The system automatically generates the daily report, the monthly report and the annual report according to the collection of the active energy and the report according to the different circuit names. Printing function, and can query the electricity consumption in a certain period of time of a certain loop, can help the property to establish an effective energy management assessment system. Through the construction of the system and the establishment of the system, the energy-saving awareness of the office workers in each enterprise has been greatly improved, and the energy consumption of the enterprise management office has been effectively saved. .jpg)
3. Significance of applying power monitoring system in power supply and distribution design
In summary, the power monitoring system helps the power unit to improve efficiency, reduce losses, and reduce operating costs. The power monitoring system can effectively ensure grid management efficiency, reduce power operation costs, and become an indispensable component in power supply and distribution design. section. The power monitoring system's communication, fault alarm, data storage and record functions make the staff more convenient in actual work. They can directly understand the operating status of the power system through the man-machine interface, and can quickly transmit the operation commands. The data transmission of the equipment is realized through network transmission. Therefore, different power monitoring systems can design different networking modes to ensure that data information can be transmitted quickly and accurately. On the other hand, in the power supply and distribution design, the power monitoring system should be used, and the monitoring equipment should be selected according to the actual situation. Generally, power monitoring systems usually use devices with functions such as remote communication, remote observation, and remote control, while some high-end power monitoring systems require smart devices with more complete functions.
Setting up a power monitoring system in commercial buildings, office buildings, etc., can realize real-time monitoring of high and low voltage distribution circuits in the building, which is conducive to power management. On the other hand, the power monitoring system can not only accurately indicate the power consumption status of the circuit, but also has the functions of network communication, etc., and can be combined with computers, serial servers and other devices to display the operation status of each power distribution circuit in the building in time. When the load of the power system in the building exceeds the standard, the power monitoring system can quickly alarm and issue a voice prompt. In addition, the power monitoring system can also generate statistical information such as reports and graphs, so that relevant personnel can analyze the power consumption status of various parts in the building, and make the electricity activities in the building safer, thus ensuring the safety of the people in the building and improving the office. Staff efficiency.
references
[1] "Guidelines and Application Guidelines for Digital Measurement of Electric Power Measurement", Ren Zhicheng, Zhou Zhong, China Electric Power Press
[2] "Application of Power Monitoring System in Power Supply and Distribution Design", Gao Shihong, Technology Wind
[3] "Power Monitoring for 10kv Power Supply and Distribution Design", Yao Qiang, Technology World
About the author: Yang Junjun, female, undergraduate. Position: Now working for Ankerui Electric Co., Ltd., contact number, mobile phone, QQ
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn