The power monitoring system plays an important role in the entire power system. It can effectively promote the efficiency of power grid management and reduce the operating cost of the power system. This paper applies the application of the data center computer room construction project of China First Automobile Group Corporation.
Yang Junjun
Ankerui Electric Co., Ltd. Shanghai Jiading
0 Preface
Distribution automation is a comprehensive information management system integrating computer technology, data transmission technology, control technology, modern equipment and management. Its purpose is to improve power supply reliability, improve power quality, provide quality services to users, reduce operating costs, and reduce the labor intensity of operators.
With the continuous development of power networks, the continuous increase of power load, various new types of loads continue to emerge, users pay more attention to power quality issues, but also put more stringent requirements on power quality. Users need more effective power monitoring and management solutions to meet the challenges of these changes in order to achieve continuous, reliable, efficient and low-cost operation of the distribution system. This paper introduces the application of power monitoring system in heavy industry factories through the construction of power monitoring system for data center computer room construction project of China First Automobile Group Corporation.
1 Project overview and construction goals
China First Automobile Group Corporation is referred to as “China FAW†or “FAWâ€. The English name is FAW, a member of the central enterprise, and a state-owned super-large automobile manufacturer. FAW headquarters is located in Changchun City, Jilin Province, formerly the first automobile manufacturing plant, and Chairman Mao Zedong inscribed the name of the factory. FAW was laid in 1953. It was built and put into operation in 1956, and the first Chinese liberation truck was built. In 1958, the first Dongfeng brand sedan in New China and the first red flag limousine were built. The completion of FAW has created a new history of the Chinese automobile industry. After more than 50 years of development, FAW has become one of the largest auto enterprise groups in China. FAW's production and sales volume and operating income have been among the forefront of the Chinese auto industry for many years. In 2010, FAW sold 2.558 million vehicles, achieving an operating income of 417.9 billion yuan, ranking 141th in the "world's 500 largest companies"; in 2010, the "China FAW" brand value reached 65.332 billion yuan.
Facing the future, FAW put forward the corporate vision and goal of “adhering to the user first, respecting the value of employees, safeguarding the interests of shareholders, promoting social harmony, and striving to build an internationally competitive 'independent FAW, strength FAW, and harmonious FAW'â€. FAW people are taking advantage of their unique car feelings, fighting against the strong, high-spirited, to promote the sound and rapid development of the automotive industry, to make new and greater contributions to the harmonious development of people, cars and society.
2 Design of power monitoring system
In the design of the monitoring system, it is necessary to fully consider the actual needs of the customer, as well as 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 Conducive to the realization of system functions.
The power monitoring system of the project can realize real-time monitoring of the low-voltage distribution circuit in the plant, which is beneficial 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 distribution circuit in the factory in time. When the load of the power system in the plant 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, which is convenient for the relevant personnel to analyze the power consumption status of various parts in the plant, so that the electricity activities in the plant are safer, thus ensuring the safety of the personnel in the plant and improving the business. Staff efficiency.
2.1 System Structure
According to the distribution of power distribution in new shopping malls, the online monitoring system construction adopts a layered and distributed structure. The system includes: station control management layer, network communication layer and field equipment layer. The system network structure is as shown:
The station controls the management personnel to directly interact with the computer for human-computer interaction, calculate, analyze and process all kinds of data information on the collected site, and reflect the operation status of the site in the form of graphics, digital display, sound, etc., which is the most Upper part. Mainly consists of system software and necessary hardware equipment, such as industrial grade computers, printers, UPS power supplies and so on.
The device used by the communication layer is the NPORT232I serial server. This layer is a bridge for data information exchange. It is responsible for collecting, classifying and transmitting the data information returned by the field devices, and at the same time relaying various control commands of the host computer to the field devices.
The field device layer is mainly connected to various types of instruments used for electrical parameter acquisition and measurement in the network, and is also a basic component necessary for constructing the power distribution system. The acrel PZ42L-E4 electric energy meter is configured on site to realize the three-phase current, three-phase voltage, frequency, power, four-quadrant electric energy and other electrical parameters monitoring of the low-voltage circuit; and the closing state of each circuit breaker is monitored.
2.2 Network Design
The network system in the power monitoring system can transmit data in time and quickly transmit operational commands, which is the basis for realizing various functions of the power monitoring system. Each device in the field is connected to the bus in situ, and then all the buses are connected to the communication gateway to realize the transmission with the host.
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.
2.3.1 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.
2.3.2 Data Recording
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.
2.3.3 Power Management
In order to realize the supervision of the electricity consumption of each circuit in the factory, the system designed the power management report. The system automatically generates the daily report, monthly report and annual report and has the report printing function by collecting the active energy and according to the different circuit names. And can query the electricity consumption in a certain period of time of a certain loop, which 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 awareness of energy conservation of the resident managers has been greatly improved, and energy consumption has been effectively saved.
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 industrial buildings and other places can realize real-time monitoring of the low-voltage power distribution circuit in the plant, 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 distribution circuit in the factory in time. When the load of the power system in the plant 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 plant, and make the electricity activities in the plant safer, thus ensuring the safety of the personnel in the plant and improving the work. 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
About the author: Yang Junjun, female, undergraduate. Position: Now working for Ankerui Electric Co., Ltd., contact number, mobile phone, QQ
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