The current situation and development direction of

The current situation and development direction of distribution automation in China Abstract: the development of distribution automation in China is the inevitable result of power market and economic construction. For a long time, the construction of distribution has not been paid due attention, construction funds are short, equipment technical performance is backward, and accidents occur frequently, which has seriously affected the development of people's life and economic construction. With the development of power and the establishment of power market, The weak link of power distribution is becoming more and more prominent, forming a situation of uncoordinated power demand and electrical facilities

key words: current situation and development direction of distribution automation 1 overview the development of distribution automation in China is the inevitable result of power market and economic construction. For a long time, the construction of distribution has not received due attention, construction funds are short, equipment technical performance is backward, and accidents occur frequently, which has seriously affected the development of people's lives and economic construction. With the development of power and the establishment of power market, The weak link of power distribution is becoming more and more prominent, forming a situation of uncoordinated power demand and electrical facilities. After the implementation of the power law on facilities promulgated by the state, power entered the market as a commodity, accepted the supervision and choice of users, and even investigated the power operators for the impact of power outages in power supply. On the other hand, high-precision technology and equipment require power quality, and the reliability of distribution and power supply has become the main problem that power operators must consider. With the change of market concept and the demand of power development, distribution automation has become a very urgent task for power supply enterprises. Urban electricity has been aware of the potential danger of power distribution since the 1980s, and has made every effort to call for the transformation of urban electricity. A national conference was organized to put forward specific implementation plans for the transformation of power distribution. Funds were collected from various channels, and plans were put forward to change the plan. High-tech and high-performance equipment were used to carry out the transformation of electricity. For example, a national urban work conference was held in May 1990, which proposed the important position of urban power distribution in the power system and required the adoption of power equipment with excellent performance to improve power supply capacity and ensure power supply quality. According to the requirements of power supply, the power supply department has put forward the reliability requirements of distribution system for users' power supply, and the reliability index of power supply has reached 99.6%. Airports, banks, computer networks and service monitoring centers are places with high requirements for power quality, and it is impossible to guarantee without reliable power distribution. The comprehensive transformation of distribution is the basic early stage of realizing distribution automation. It is impossible to realize distribution automation without good electricity and electrical structure and good equipment. Because the early distribution has been basically formed, it can only be transformed on the basis of the original distribution, which is difficult. We should strive to achieve the purpose of high automation, make overall planning, and meet the development requirements of modern cities in terms of equipment. Therefore, The basic requirements of urban power distribution equipment are advanced technology, safe and reliable operation, simple operation and maintenance, economic and reasonable, energy conservation and environmental protection requirements. The application of power distribution is determined by economic construction. Therefore, whether it is power distribution in large cities, small cities, county-level cities or even rural distribution, the transformation of power distribution and distribution automation should be based on the following aspects: 1.1 based on the national conditions: the actual requirements of urban power distribution are combined with the actual problems of power distribution, so as to meet the requirements of power supply reliability and user power supply, not to engage in form, not to follow the trend, not blindly, Combined with technical and economic comparison, the limited funds will be invested in more practical and effective power transformation to solve more prominent technical problems. 1.2 on the premise of ensuring the reliability of power supply, ensure the timeliness of power consumption by power users and meet the power supply needs of power users. Whether the power is in short supply or rich, we should take the actual requirements of users as the starting point, do a good job in the service of users' power consumption, avoid the impact of power supply caused by other accidents, and reflect the needs of users as power management departments. (1) Starting from the actual requirements of users, ensure the demand for electricity. (2) Moreover, the noise of the machine is also very small. Improve the conveying capacity of the network and adjust the network structure; (3) Improve the reliability of technical equipment and the maintenance free requirements of the operation Department; (4) Improve the automation degree of equipment and the ability to judge faults. 1.3 meet and ensure the quality of power supply, meet the requirements of high-tech equipment and household appliances, avoid peak and trough, voltage amplitude, frequency and harmonic will have adverse effects on users, and adopt bee and voltage regulation to ensure power quality. 1.4 reduce the loss of electricity. The loss of electricity is inevitable to promote the technical exchange and business negotiation between enterprises, but the loss depends on the electrical structure and the conditions of transmitting electrical load. One of the urban electricity is to increase the conductor cross-section, reduce the resistivity of the line, and adopt new transmission electrical fittings to reduce the power loss of the line. Adopt reactive power on-site compensation, improve power factor, reasonable dispatching and load distribution, optimize network amplitude range, large power flow, and economic operation. 1.5 improve the power supply capacity of the network and reduce the probability of power failure of users. The mutual supply capacity of the network is mainly reflected in the reasonable adjustment of network wiring and load. 1.6 adopt automatic equipment, improve the fault judgment ability of the equipment and automatically isolate the fault, restore the power supply conditions of non fault lines, and select automatic equipment with a high degree of automation. 1.7 solve the technical performance of the equipment used for power distribution, improve the reliability and operation ability of the equipment, especially the operating mechanism and internal structure of the power distribution switchgear are suitable for outdoor (indoor) operation conditions, so that the maintenance cycle is long and the equipment operates reliably. Greatly reduce the impact of raw material indexes on diaphragm performance, and greatly reduce the labor intensity and maintenance cost of operators. 1.8 it is convenient for system monitoring, economic dispatching of power distribution, real-time network economic analysis, historical data recording and backup, and event record query planning. At present, China's power distribution is in a period of rapid development, and the state gives great support from the policy and has the corresponding financial conditions, but China's power distribution is still in the exploration period of the scheme, especially the scale and coverage of China's power distribution, and the market size is incomparable to any economically developed or developing country, and the development of China's power distribution is also synchronized with the economic development. In order to explore China's power distribution automation, It has successively investigated foreign distribution modes and carried out practical pilot projects in China. However, it should be noted that China is a large country. There are many differences between China's power distribution and foreign power distribution, and it is impossible to completely copy and