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Since 2002, the power supply bureau has established an intelligent power distribution inspection system based on the original power distribution GIS platform. The system adopts RFID (Radio Frequency Identification, radio frequency mark) technology and combined with PDA (Personal Digital Assistant) equipment to improve the operation and management level of the distribution network and the in-place rate of the distribution network equipment inspection, ensuring the comprehensiveness of the equipment inspection , And realized the quantitative analysis of the inspection situation of the operators. Since the system passed the acceptance in December 2005, a total of 2500 RFID devices have been installed, which basically cover all kinds of network distribution equipment that need to be inspected daily. The inspection completion rate has also increased from 20% to 30% at the beginning of the trial operation to the current one. 95%～100%.
1 Introduction to RFID technology and PDA equipment
1.1 RFID technology
Radio frequency identification technology (RFID) is a type of automatic identification technology, that is, non-contact two-way data communication through wireless radio frequency to identify the target. Automatic identification technology is a technology that uses identification devices to automatically obtain relevant information about the identified items through the proximity activity between the identified item and the identification device, and provide it to the back-end computer processing system to complete related follow-up processing.
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Figure 1 System structure diagram
In the intelligent power distribution inspection system, automatic identification technology is used, RFID technology is used to identify the power distribution, and the PDA is used to obtain information. It can complete the following functions: Unique identification: Use the electronic tag to establish the “ID card” of the equipment. ；
Patrol in place: Automatically identify equipment, read equipment information, and use equipment electronic tags to ensure that operators are in place to patrol.
1.2 PDA mobile computing technology uses mobile terminals such as smart phones and PDAs to exchange data and information using WAP, GPRS, EDGE, CDMA1X and other technologies. It can be used anytime and anywhere to achieve sudden, emergency and convenient effects; smart phones and palmtops can be carried with you, as long as you can make a call, you can move and work, which greatly improves work efficiency and work quality.
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Figure 2 Appearance of PDA
The use of PDA in the intelligent power distribution inspection system can easily realize the management requirements for the expansion of the inspection project template and common term defects in the future. In the future, it is also planned to be equipped with PDA devices with GPS and GIS functions and wireless communication, so as to achieve real-time processing of inspection results and defect repairs.
2 System structure
The work process and system modules of the intelligent power distribution inspection system are shown in Figures 3 and 4, which will not be explained here.
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Figure 3 System flow chart
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Figure 4 System module structure
3 Implementation
3.1 Implementation steps
The distribution network equipment is divided into several units (nodes), and the on-site equipment is inspected and overhauled using preset procedures.
First, divide the equipment into several units (nodes). There are seven categories including switchyards, overhead lines, benches, pole switches, power distribution rooms (box substations), outdoor ring network cabinets, and branch boxes with switches. Secondly, standardize and refine the inspection content of the unit (node). Third, number each unit (node) (barcode or magnetic stripe can be used). Fourth, according to the number, the inspection and maintenance work procedures such as the inspection content of each unit (node) will be automatically jumped out on site. The program is divided into two modes: switch station, power distribution room (box change), outdoor ring network cabinet, branch box with switch are the overall menu; overhead line is the hierarchical menu. Fifth, operate item by item in order according to the drop-down menu of the preset program, and record the on-site situation in time. Sixth, during the inspection, each unit in the area is used as a unit, and special concentrated inspections are carried out, that is, the distribution room (box change) is a unit, the platform is a unit, and the overhead line is a unit, etc.
The power supply bureau plans to install radio frequency devices on all distribution network equipment and put them into operation in stages. In the first stage, the current conditions are mature switch station, power distribution room (box substation), benches, etc.; the second stage is for outdoor ring network cabinets, branch boxes with switches, and pole switches; the third stage is for overhead lines .
3.2 Installation location
Switch station: install one for each station; power distribution room (box substation): install one for each; stand: install one for each station; pole switch: install one for each station; outdoor ring network cabinet: install one for each station One; branch box with switch: install one for each seat; overhead line: install one at the head and end of the main line and branch line.
3.3 Main points of the tour
Switch station: civil engineering foundation, primary equipment, secondary equipment, DC system, lighting, fire protection, surrounding environment;
Overhead lines: poles, towers, guy wires (piles), poles equipped with line arresters, poles equipped with branch boxes, corner poles, terminal poles, densely populated areas, spanning buildings, near balconies, large-scale construction Construction sites, heavily polluted areas, wire joints, three-line intersections, etc.;
Bench: surrounding environment, power supply, high and low voltage switch, lightning protection device, grounding device, capacitance compensation device, power distribution comprehensive tester;
Column switch: air pressure, temperature, isolation switches on both sides, surrounding environment;
Power distribution room (box substation): civil foundation, primary equipment, secondary equipment, lighting, fire protection, and surrounding environment;
Outdoor ring network cabinet: air pressure, temperature, primary connection diagram, identification, pollution, condensation, surrounding environment;
Branch box with switch: air pressure, temperature, primary connection diagram, identification, contamination, condensation, surrounding environment.
Inspection cycle and method: The inspection cycle of 10kV equipment is once a month. The inspection methods are divided into five types of concentrated time inspections, namely overhead lines and auxiliary equipment, switch stations, power distribution rooms (box substations), and cable lines (including channels and cables). Branch box, outdoor ring network cabinet).
4 System characteristics
4.1 Application of RFID
RFID is the most advanced marking code at present. It has the characteristics of not easy to break, reliable data, long service life, long effective communication distance, etc. After it is installed in the power distribution room and switch station, it can be used as the only sign of equipment for inspection.
4.2 Extensible inspection project template and common term management for defects
The patrol project template provides corresponding basic patrol items and common terms for defects for each basic patrol unit. The patrol project template can be maintained by the administrator in the background, and the common terms for defects can be added, deleted, and corrected according to actual needs. The smart device is updated. At the same time, users can also customize the description of device defects. The system also supports the expansion of patrol items to facilitate the expansion and supplement of the basic patrol unit in the future.
4.3 Close integration with the distribution network GIS system
The close integration of the intelligent inspection system and the distribution network GIS system makes it possible to directly select the equipment from the map according to the geographic scope of the inspection when making the inspection plan, which greatly improves the work efficiency. You can also inquire about the equipment’s inspection status, defect status, and MIS defect list processing status from the map.
4.4 Automatically fill in and report defect handling work orders
The system realizes the interface with the MIS system, which can automatically fill in the defect sheet according to the defect type and defect level and send it to the MIS defect processing process, and can view the processing status of the defect sheet in the intelligent inspection system in real time.
5 The effect achieved
When the inspectors read the radio frequency signs buried in the equipment site, the on-site inspection work can start, which ensures that the inspectors are in place.
Through the inspection procedure, each inspection point can be inspected layer by layer, and the inspectors must check the inspection content and order of the inspection table item by item to ensure the quality of the inspection.
The intelligent inspection work is combined with the MIS distribution network defect process to form a closed-loop management that starts from the formulation of the inspection plan, to the discovery of defects, and then to the elimination of defects.
The system of Chuangyi Technology can query the execution of the inspection plan and count the inspection rate according to the combined conditions of the inspector, plan name, area, team, time period, inspected/unpatrolled, etc., which can facilitate and intuitively understand the work of each inspection team Under the circumstances, the quantitative analysis of inspection work has been realized.
Beijing Chuangyi Xingsheng Technology Development Co., Ltd.
Phone: 010-58077045 010-58077046 010-58404210 010-58404205
Fax: 010-58077046 010-58077046
Website: www.radio99k.com
Contact: Miss Yu
Address: 2501, Block B, Riyuetiandi Building, South Second Ring Road, Beijing
Chuangyi Xingsheng Better wireless experience
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