Ankerui Electric Co., Ltd. Shanghai Jiading ã€Abstract】 The intelligent, refined and unattended user-side distribution system is an inevitable trend of current distribution management. Design and install smart meters for the power distribution line on the user side, and then monitor the working status of each energy circuit in real time through the background system; and record the power parameters of each circuit. By monitoring the energy and related power parameters in real time, improving the safety, reliability and maintenance efficiency of energy consumption, reducing the labor cost of maintenance, the unattended monitoring of the power distribution system is realized. Through the use of real-time monitoring, data collection and storage, the user's power usage level and the operating state of the power distribution system are clarified, providing users with data maintenance for power maintenance costs and property management, and later based on the power distribution system. Analysis of operational data to develop a corresponding distribution system maintenance program. A brief introduction to the ACREL-2000 power monitoring system used in the Nanchang Xinli. Yujingwan project is now available. Key words : power monitoring, unattended distribution, maintenance, intelligent distribution system, distribution automation 1 Project overview and construction goals Nanchang Xinli. Yujingwan project has ensured the reliability of power supply in the design of a system, but it also needs real-time monitoring and power management of the power supply system, so that there may be potential safety hazards to the power supply system. The operation status of important equipment has a clear and timely understanding, and at the same time, it guides all electrical equipments to use electricity reasonably and efficiently, laying a solid foundation for building green shopping malls. The power distribution system operation and maintenance personnel have the following requirements for the power supply and distribution system: 1 Improve the safety and reliability of the power supply system and maintain it for a long time to ensure the continuity of power supply in important places; 2) Real-time grasp of the operating status of the power supply system and possible hidden dangers, and quickly eliminate the fault; 3) Reduce system line loss and improve power factor; 4) Keep abreast of the power consumption of various departments and regions, and give guidance opinions; 5) Improve the automation and operation efficiency of the power distribution system and save manpower. 2 Design of power monitoring system In the design of the monitoring management system, the characteristics of the enterprise itself, the actual structure of the power system, the actual load capacity of the power system, and other factors are taken into consideration, and the management equipment is reasonably selected, which is beneficial to reducing the cost of the system operation. It is also beneficial to the realization of system functions. The automated power monitoring software needs to be simple and easy to operate and meet relevant regulatory standards. 2.1 Selection of power monitoring equipment The requirements for power supply safety and reliability include real-time understanding of the power supply system, rapid response to faults, and restoration of power supply for unexpected power failures in a very short period of time. Therefore, it is necessary to configure a microcomputer protection device for the 10kV distribution circuit to monitor the 10kV circuit in real time. Operation status, and respond quickly to abnormal or severe faults within 40ms, through sound and light alarm signals or directly remove serious fault points, to avoid accidents and expand the scope of accidents; through I/O modules And the transformer thermostat records the operating status of all circuit breakers, transformers, and equipment, such as the number of times the switch is broken, the temperature of the transformer, and other equipment information, and establishes equipment maintenance and repair files to avoid accidental power outage due to equipment failure; Calculate the power consumption information of each electrical equipment in real time; monitor the power factor of the power supply and distribution system in real time through the reactive power compensation controller, and perform local reactive power compensation by automatic capacitor injection when the power factor of the system decreases. 2.2 Power monitoring system network composition 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 the engineering station and the telecontrol communication station, including the monitoring computer, network switch, printer, UPS and Acrel-2000 power management software. The software part has a good human-computer interaction interface, and the communication management machine collects the data through the data transmission protocol. The various types of data information on the site are automatically calculated and processed to reflect the operation status of the site in the form of graphics, digital display, sound, etc. The energy measurement management function is designed to conform to the user's report format, and the data in the report is strictly measured according to various standards. To build a complete measurement system, users only need to find and print, which greatly facilitates the operation and improves the work efficiency. The communication network layer includes devices such as communication management machines and network switches. The network structure is shown in the following figure: 2.3 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" 2.4 Power monitoring system software function design The system is designed according to the actual needs of customers, 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; energy report query and printing; system load Main functions such as real-time, historical curve, and user rights management. 3 system function The PC software adopts ACREL-2000 power monitoring system, and completes the functions of software monitoring and power monitoring in the host computer through software configuration, database variable configuration and interface design. 3.1 Features ACREL-2000 power monitoring system adopts full Chinese interface, which is easy to operate and stable and reliable. Click the corresponding shortcut button to enter the corresponding system function module; the system has a system diagram display, simulation diagram display and network structure diagram display; the system has a friendly man-machine interface, and the display data is intuitive and convenient for users to consult. 3.2 Software features : 3.2.1 Operating system The software interface can be designed according to the characteristics of the project and the requirements of the customer. The initial interface is the “login interfaceâ€. The customer needs to enter the corresponding password through the user name to enter the system. The interface is shown in Figure 2. Figure 2 login interface 3.2.2 Communication diagram The communication diagram is a topology diagram showing whether the communication between the system and the instrument is normal. The change of the color of the interface module reflects the running status of each monitoring point of the entire system. 3.2.3 Monitoring details The monitoring details reflect the name of the entire system distribution circuit, the corresponding distribution system, and the main electrical parameters of the circuit. Through the display of real-time data, the operation data of each monitoring loop of the project is visually reflected, which is convenient for the manager to know the running status of the system in real time. The interface is shown in Figure 4. 3.2.4 Parameter meter reading The parameter report reflects the operational data of the monitoring loop of the project at a certain point in time, and the real-time parametric data at a current or past time point reflects the loop status. The main data includes: three-phase voltage, three-phase current, electric energy, active power, reactive power, power compensation factor, frequency. The interface is shown in Figure 5. Figure 5 Parameter reading 3.2.5 Energy Report The energy report is the management of the power consumption in the form of a report. The report can realize the functions of monthly meter reading, daily meter reading, hour meter reading, etc., and can be exported or printed in Excel at any time during the system operation. The interface is shown in Figure 6. Figure 6 Energy Report 4 Conclusion Xinli. Yujingwan power monitoring system realizes real-time collection, storage, display and export of power consumption data. From the construction of the power distribution system to the later commissioning, the system data is checked, and we provide the corresponding stage in the whole process. At the same time of design, installation and commissioning, the system is also a detailed combing of the building's power distribution architecture. Through the careful classification of the energy consumption, the operation mode and state of the power distribution system in the building are clarified. It meets the customer-related customization requirements, provides customers with a variety of data analysis and processing methods, and export methods to facilitate the related management of the later properties and improve the efficiency of customer service. In addition, the system realizes the analysis and processing of the collected data, displays the power usage status of the power distribution loops of the owner in real time, and has a pop-up alarm dialog box and an alarm sound prompt, and generates various energy reports, analysis curves, and graphics. Etc., it is convenient for remote meter reading of electric energy and analysis, research and development of corresponding energy service plan. The system is safe, reliable and stable, and realizes the real-time monitoring of the working status of each distribution circuit and the real-time display of important electrical parameters for the end users of the distribution system, which provides real and reliable data for the maintenance of the distribution system of the later property managers. in accordance with. Sweater Sweaters are knitted by machine or by hand. The history of sweater knitting is very long. Human beings used leaves and animal skins to cover their bodies in primitive life, and later learned to use knitting techniques, so sweaters were produced. With the evolution of civilization and the invention of technology, there are more and more types of sweaters, with better and better quality. The function of sweaters is generally to keep warm, but with the progress of mankind, people began to pursue the beauty of sweaters.
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