Solid ring network cabinet is an important development trend of environmental protection - Database & Sql Blog Articles

The so-called "ring network cabinet" is to set up a switchgear (outlet switch cabinet) for each distribution branch. The busbar of this switchgear is also part of the toroidal trunk. That is to say, the toroidal trunk is composed of the busbars of each outlet cabinet. Each outlet cabinet is called a “ring network cabinet”. In fact, taking out a ring network cabinet alone does not mean the meaning of "ring network". Mature power technology has shown great vitality in the short period of the 21st century. The emerging power technology represented by renewable energy, smart grid, UHV, and transportation electrification has become the focus of the global scientific and technological revolution. It has also become one of the focus of competition in the emerging strategic industries of the world. In the new century, China has seized a rare opportunity for historical development and has rapidly grown into the world's second largest economy. It has become the world's largest energy producer and consumer, and its power production and consumption rank first in the world. In this process, China's power technology innovation and application have achieved leapfrog development, especially the UHV transmission technology led by the State Grid Corporation. It is the most difficult and complicated power technology achievement to date. This major breakthrough has reversed the passive situation in which China's power industry has followed the development of Western developed countries for a long time, and has achieved "China's creation" and "China's leading".

In recent years, in the field of power technology, a number of new technologies and products have emerged in China, such as “Created in China” and “China Leads”. The solid ring network cabinet in the field of power distribution is a typical representative. At the turn of the new and old century, Toshiba and other international leading companies have developed high-performance epoxy resin and high-efficiency casting technology, and then developed a solid insulated switchgear, which is used in a small range, but it has not been widely used until today. Promote the application. In February 2005, the Kyoto Protocol to the United Nations Framework Convention on Climate Change began to be enforced, and for the first time in human history, greenhouse gas emissions were restricted by regulations. The domestic power distribution technology enterprise represented by Shuangjie Electric has a huge space for the development of SF6 ring network cabinets instead of environmental protection products, and decided to develop solid ring network cabinets. In 2007, the first solid insulated ring network cabinet of the domestic enterprise “zhizhi” passed the type test and entered the stage of promotion and application. In 2010, 30 sets of solid ring network cabinets provided by domestic enterprises were put into application in Tibet's power supply bureaus with an average altitude of more than 4,000 meters. They solved the problem of using the SF6 ring network cabinet to reduce the automatic expansion due to high altitude pressure. Leakage caused short-circuit phenomenon, low-temperature SF6 gas will liquefy, causing two major problems of insulation and arc-extinguishing performance. It also provided environmentally friendly products for the snowy plateau due to the elimination of SF6. In August 2011, the “First Series of Key Technologies for New Technology Promotion of State Grid Corporation” was released, and the solid insulated ring network cabinet became one of 34 key new technologies for application and application, and pointed out that technical reliability and environmental protection requirements are more stringent. Looking at the development trend, the solid ring network cabinet has a tendency to completely replace the SF6 gas insulated ring network cabinet. In June 2013, the National Energy Administration issued a plan for the development of power industry standards for the Technical Conditions of 12kV Solid Insulated Ring Network Cabinets. In order to make the power industry standard of "12kV Solid Insulation Ring Network Cabinet Technical Conditions" objective and accurate, under the support of the State Grid Corporation's Transportation Inspection Department and China Southern Power Grid Equipment Management Department, experts conducted on-site work for some grid users and mainstream suppliers. Research and lead the organization of the "Solid Insulation Ring Network Cabinet Production Application and Market Research Report". The survey found that users in Xinjiang, Qinghai, Inner Mongolia, Shanxi, Guangdong and other places have a positive attitude towards the operation of solid insulated ring network cabinets. In some areas, solid insulated ring network cabinets will be used. In the absence of suitable choice, solid insulated ring network cabinets are preferred. .
Experts pointed out that solid ring network cabinets are one of the development directions of environmentally friendly ring network cabinets. To achieve further promotion and application of solid ring network cabinets, it is necessary to solve some technical deep-seated problems, to ensure the quality of products with reliable materials and advanced technology, and to prevent the emergence of vicious competition in the price, the supply and demand sides work together to build smart and environmentally friendly The distribution network provides emerging main products.

Compared with sf6 gas or air insulated ring network cabinet, the advantages of solid ring network cabinet are more obvious, miniaturization, maintenance-free, environmental protection, and its technology is more and more mature, representing the environmental protection development of China's medium voltage ring network cabinet. The trend and direction, and in the practical application has achieved reliable and valuable application experience, solid ring network cabinet will become an important power equipment product of medium voltage ring network cabinet.