Application of Power Monitoring System in 10KV New Construction of Keshida (Changchun) Automobile Electric Appliance Co., Ltd.

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 is applied in the new 10KV project of Keshida (Changchun) Automobile Electric Co., Ltd.
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 factory through the construction of power monitoring system for 10KV new construction project of Keshida (Changchun) Automobile Electric Co., Ltd.

1. Project overview and construction goals

China Hardware Business Network Keshida (Changchun) Automobile Electric Co., Ltd. is a German-owned company founded in 2011. The investor is Germany Kesida. Its headquarters is in Shanghai. Founded in 1912, Germany Kesida Company is an international multinational company with 16 subsidiaries worldwide. It mainly provides solutions for automotive electrical systems, industrial electrical systems, connectors and testing equipment. The main customers are Mercedes-Benz, BMW and Volkswagen. General Motors, etc., has strong production and development capabilities. Guizhou Aviation Group is one of the backbone enterprise groups in China. The Huayang Electric Factory has a military base, and its technical and development level is at the leading position in China. Shanghai Angong Economic Development Co., Ltd. is a local investment company with rich experience.

The company's main business scope is the development, manufacture and sale of automotive electrical and electronic products. In 2005, the company fully used the SAP system to realize the global sharing of the KOSTAL Group, which is the data network for operation, development, technology, quality, production and logistics. The business operations are increasingly modernized and internationalized. At the same time, the company passed the ISO9001, QS9000, VDA6.1, ISO14001 and TS16949 system certifications of TÜV Rheinland. From 2003 to 2012, the company was rated as “Top Ten Enterprises in Anting” for ten consecutive years. It has won the comprehensive strength award of the district government for many times and was awarded the certification of advanced technology enterprise. In 2006, it was awarded the Shanghai Technology Center and was recognized in 2008. As a high-tech enterprise in Shanghai, a number of product technologies have obtained national patents.





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:

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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 NPORT5410 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. ABB's microcomputer protection and energy meter are configured on site to realize high- and low-voltage circuit three-phase current, three-phase voltage, frequency, power, four-quadrant power and other electrical parameter monitoring and protection action information; and each circuit breaker is closed and closed. Monitor.

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 condition and protection action information of the circuit breaker, the isolating switch, the grounding knife gate and other equipment. And alarm information such as power failure protection and operation failure are 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.

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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.

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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. The energy consumption is approximated by the system.

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3. The 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
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn

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