Abstract: With the rapid development of science and technology, computer technology and network communication technology widely used in the power system, which effectively increases the level of automation of the power system. The current electricity distribution automation business as a major construction job content, but also with the upgrading of the level of distribution automation, power system data processing more diversity and complexity of people of a higher power supply reliability requirements. This article starts from the grid Supply Reliability overview, analyzes the advantages of distribution automation applications in the power system, and further affect the reliability of the distribution network automation power supply situation has been specifically described.
Keywords: distribution automation; power system; power supply reliability
CLC: TM727 Document Code: A
0 Introduction
In the current distribution automation systems, primarily relying on computer technology, automation technology, data technology and storage technology to all kinds of information distribution network will integrate to form a complete automation system. The current distribution network operation monitoring and management has been achieved automation and information technology, including the distribution of data collection and monitoring, demand-side management and content distribution network geographic information systems, in the actual operation of the distribution network, once running abnormality or failure, it is possible to quickly isolate the faulty section, the recovery section and the non-user power failure, shorten the time and reduce power outage area, improve the reliability of power supply.
Reliability of power grid 1 Overview
China's power grid with a relatively late start, for distribution to study the feasibility of power compared to the developed countries there is a certain lag. In recent years, China's scientific and technological development faster, which also makes the distribution network reliability continues to improve. At present, China power distribution system, the main problem in two aspects, namely the distribution network structure and network equipment obsolete. So for grid companies, but also based on their actual situation, increase capital investment, improve the reliability of the distribution network, has laid a good foundation for the operation of the distribution network security, stability.
2 distribution automation technology and its application advantages at this stage in the power system analysis
Distribution automation technology is mainly applied in the shortest possible time through the grid of modern information technology and electronic equipment, effective monitoring of the power grid, once the distribution network fails to complete timely distribution line inspection and to take effective measures to ensure that the restoration of electricity, improve the reliability of supply. Distribution Automation Project as one of the more electric power engineering systems, with difficult, high technical requirements and long cycle characteristics, and therefore need to focus on infrastructure construction, all localities should combine their actual situation to develop appropriate building programs.
In the distribution automation technology, will be more effective focus on advanced modern technology as a whole, through coordination, build a sound control system, to achieve a comprehensive supervision of power system distribution network system to optimize power distribution, and based on Shekuaijingji needs to further enhance the reliability and security of supply, to lay a good foundation for improving electricity service levels. In addition, for applications at high altitude distribution automation technology, combined with the need for adequate distribution of the existing distribution network in the region, and better play the role of a risk diversification device, effectively reduce the power failure distribution automation technology systems by adverse effects, in a short time to accurately locate the fault area, the specific cause of the failure analysis, providing an important reference in order to carry out the corresponding maintenance work to maintenance personnel.
3 distribution automation technology for power supply reliability impact Analysis
Through the application of technology in the power distribution network automation system, can effectively ensure the security and stability of power system operation, to ensure better control and management to achieve results. For the power system, when its operation when not equipped with internal distribution automation equipment, once a power failure occurs, the entire line will be in blackout state, in follow-up maintenance work carried out during the maintenance personnel can not be rapid development issues for problem areas can not be judged accurately, maintenance work more difficult. In order to effectively prevent this from happening, the power companies, power failures can accurately locate the position through the application of distribution automation technology, and timely fault isolation, to ensure reliability of supply.
3.1 narrowing the scope of failure
With the enhancement of the level of automation technology in power system distribution network, it is reasonable control of power system lines, improve operational line of security, stability and reliability, and universal use of distribution automation technology, can effectively narrow the scope of failure to realize the intelligent control lines running in the respective switch, once the failure or abnormal situation, analyzed for specific regions of power failure can quickly locate the fault, the fault narrow scope. For common line, when a feeder distribution network switch tripping occurs, load other lines can be maintained in a good state of power distribution automation technology action. This line is connected to the respective terminals and monitoring, in turn connected to the control terminal while the background computer having a direct relationship, in this case, it is possible to achieve full control, there is a problem when the line, i.e. the first time possible to isolate a power failure, in order to ensure the sustainability of power supply work. Effects of low pressure power density during operation of the device by the high altitude, the air insulation voltage electrical equipment may be lowered, so in practice need to take full account of this factor in distribution automation technology, can be specifically set parameters Troubleshooting Key observations electrical equipment must stretch margin pressure resistance, effectively narrow down the fault.
3.2 Troubleshooting shorten the time needed for the work
After the traditional power system power supply failure, the need for a line fault by one investigation, will use a large number of maintenance personnel, there is a serious waste of labor resources, while also not been able to supply power, there are cases of delays in the supply of time, which is bound power users to bring greater impact. However, when the power supply system based on the distribution network automation technology, once the line failure, distribution automation system in the shortest time possible to resume power transmission to the non-fault region, while also providing accurate failure determination area maintenance personnel, so maintenance personnel can deal with failure to complete in the shortest possible time, and work to restore power failure area. Compared to the plane area, the plateau region is very poor natural conditions, a relatively large temperature difference between day and night, and adverse weather conditions occur frequently, vast and sparsely populated geographic area, in the distribution network system construction process, the longer the line power supply radius, while the load the flow of small, need to set up more distribution points, so the judge and treatment for high altitude during a power failure, distribution automation technology to actual needs of its small capacity to adapt to multi-point distribution, so as to achieve human and material resources savings, improve efficiency and better ensure continuity of supply, ensure the safety of people of electricity.
3.3 Maintenance of power supply reliability
Achieve reliability of power supply, we need a good distribution network automation as a basis for building maintenance, and to ensure the safe operation of the distribution system by extending the service life of power protection equipment. In practice, it is necessary to further optimize the power distribution system, effectively reducing the power consumption system operation, and to ensure the stability and power resources to achieve a reasonable distribution line design on the basis of continuous power supply. DETAILED skill in the actual transformer assembly process, a coil needs to be wound on a closed core, the number of lines to circle there is a difference, and a current communication, by alternating current in the primary coil to be checked. This allows adjustment of the effective line voltage, long-distance transmission to achieve cost savings, and a smaller current through, the power distribution system to produce the power loss is relatively smaller.
4 Conclusion
With the rapid development of science and technology in recent years the development of China's power faster, especially the effective application of technology in power distribution automation system, not only to achieve effective control of the power system, but also to ensure that the electricity users of electricity Safety. At the same time distribution automation technology, but also effectively solve the problem of power supply system reliability. Therefore, in the current social and economic development process of the increasing demand for electricity under the new situation, the need to increase distribution automation construction, rational planning of distribution automation systems, distribution automation and comprehensively improve the level of construction, better play out distribution automation system monitoring and maintenance capabilities to ensure reliability of supply and continuity, provide more convenience to people's work and life.
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