Distribution Automation Becomes a Top Priority in China

Distribution automation is an integrated information management system integrating computer technology, data transmission, control technology, modern equipment and management. Its purpose is to improve reliability of power supply, improve power quality, provide quality services to users, and reduce operating costs. Reduce the labor intensity of operating personnel.

Distribution Automation Becomes a Top Priority in China

In the industrialized countries, the automation of distribution systems has long been widely recognized. With the acceleration of the process of building smart grids in China, the automation of distribution network automation, which is an important basis for smart grids, has also been put on the agenda.

At the State Council Executive Meeting held in July last year, the State will strengthen the construction of urban distribution networks and promote the intelligentization of power grids as one of the six key tasks for urban infrastructure construction; the State Grid has also established a special working group to The automation construction and application upgrade work as a matter of urgency has given rise to a comprehensive improvement of the construction horn of distribution automation, and also indicates that the distribution network and distribution automation in the weakest link of power grid construction are about to enter the high-speed development channel.

China's distribution network has defects

Compared to developed countries, China's distribution automation has started relatively late and is still in its infancy. The market is immature and there are still some problems that need to be resolved urgently.

(1) The development of distribution networks still lags behind and development is unbalanced. In recent years, investment in distribution networks has been increasing. However, due to the large number of historical debts, the development of distribution networks, especially medium-voltage distribution networks, still lags behind. The unbalanced development of power grids in cities, rural areas, eastern and middle-western China is still prominent.

(b) The grid structure is weak and the level of automation is low. The 10 kilovolt grid structure is still weak. The gap between urban and rural networks is significant. Nearly half of the 10KV lines are still uninterconnected, and the rural network interconnection ratio is only 1/3 of the city network. The level of distribution automation is low. Distribution automation is in its infancy, and it takes a long time to diagnose, isolate, and recover from faults. It is unable to achieve network reconstruction and self-healing. This is reflected in the poor mutual supply capability, and the intuitive feeling is that it takes a long time to restore power.

(3) The basic data of the distribution network is poor, and the information technology is backward. Distribution network management involves different departments such as development, agricultural power, transportation inspection, marketing, and dispatch, and the basic data is dispersed in different systems. Data standards and models are inconsistent between systems. In addition, there is a lack of data sharing and sharing mechanisms. The investment in distribution networks is low and the level of construction is low, which leads to the relative lag in the development of distribution network communication and information systems and the lack of access to information.

The market is promising

At present, the headquarters of the State Grid Corporation of China and various local power companies are working hard to compile development plans for the distribution automation at the company level. According to the development experience of the pilot cities in 2009-2012 and revising the series of standards for combing distribution automation, the industry expects that these tasks will be It was completed in late 2013 and early 2014, paving the way for distribution automation to enter the high-speed development period of full-scale construction in 20142020.

According to Chen Feng, assistant general manager of the State Grid Corporation of China, the current grid companies are accelerating the improvement of the grid construction of distributed energy access, especially the construction of distribution networks below 10KV. Therefore, the State Grid is carrying out the rolling planning of the distribution network from 2013 to 2020, and the distribution planning will be extended to the county-level power grid. The planning is expected to be introduced before the end of the year. According to reports, the State Grid Corporation of China has issued the "Technical Guidelines for Design of Power Distribution Planning." According to this guideline, in 2015, the issue of electricity consumption in the electricity-free regions will be fully solved, and the weak link between the county-level power grid and the main network will be basically solved. A modern distribution network will be built to adapt to the rapid economic and social development and the development of urbanization. In addition, the State Grid's standard system for key technologies and key issues for distributed energy integration is also under construction.

It is predicted that 20142016 will be a blowout period for industry demand. Distribution automation investment will usher in explosive growth, reaching 150, 300, and 40 billion yuan respectively, and the compound growth rate will be as high as 100%; then it will enter into a stable construction stage, with a total investment in 2020. The scale will exceed 150 billion yuan. The sub-sector of distribution automation equipment ushered in a stronger investment condition than the market. Distribution automation project has made great achievements

Chengdu: Distribution automation has reached the national leading level

The first outstanding engineering technology expert of the State Grid, the chief expert of communication automation of Sichuan Electric Power Company, and the senior engineer of Chengdu Distribution Automation System Technology and Maintenance and Maintenance Department Zheng Yi proudly listed the achievements of the distribution automation system in Chengdu.

Since the start of construction of the project in August 2009, it has been four years since the start of construction of the project. Chengdu's distribution automation system has gone from full-scale to full-scale application and deepening. Every major breakthrough and link has been made in the efforts and hard work of all Chengdu Electric Power people. , Solid and orderly progress, and finally achieved success in the deployment and operation of Chengdu distribution network, operation and maintenance, repair and repair, etc., occupying a place in Sichuan and even the whole country, sing the courage to rush, efficiency first, practical first Grand Music.

Wuxi: Completely Launched the Transformation Project of Distribution Automation

After many years of construction and reconstruction, the connection rate of distribution network lines in Wuxi has reached 80%, and it has strong mutual supply capability. However, due to the lack of support of automation and intelligent systems, the overall regulation ability of distribution network lines is affected, and fault handling remains. The method of manual identification and manual isolation means that the power-off operation must be issued by the dispatcher and the operator should go to the site to operate. It is difficult to fundamentally improve the reliability of power supply.

It is understood that before June 2014, the company will install intelligent terminals for 197 power distribution stations and 437 ring network cabinets in the Xishan Economic Development Zone to achieve remote control of all lines and segmented switches; In the case of a few lines with long branch lengths, heavy loads, and many users, such as the KV line, Shengli line, and Yuhong line, the on-column switch at the starting point of the branch line will be replaced with a customer demarcation line breaker to achieve instantaneous removal of faults and reduce the scope of power outages. the goal of. By then, Xishan Economic Development Zone will achieve 100% distribution automation, laying a more solid foundation for further improving the power supply reliability of Wuxi Power Grid.

Tianjin: Complete Automation of Distribution Automation in Core Area

The power distribution automation construction of the State Grid Tianjin Chengnan Company commenced in an all-round way, achieving full coverage of the two core areas of Hexi and Heping. The planned investment covers peace, 36 subprojects within 30 square kilometers of Hexi and a total of approximately 1,100 power distribution stations. It is expected that the project will be completed within this year. By then, more people in Tianjin can enjoy the convenient life brought about by distribution automation. This year, distribution automation has reached a mature stage. At the same time, all the business gateways involved in distribution automation have been opened.