Starting from the "Twelfth Five-Year Plan", the investment in the electrical equipment industry in the next five years will show a "dual polarization" trend: UHV backbone networks and distribution network transformation will become the theme of grid investment, and "intelligence" will increase the proportion of secondary equipment. The high-performance high-voltage switch market will also achieve larger scale development in this process.
During the "Eleventh Five-Year Plan" period, China's power industry developed rapidly. With the support of strong industrial policies, a number of key projects in the country's power transmission and distribution industry were launched, adding new impetus to the development of the high-voltage switch industry.
Industry experts said that during the "Twelfth Five-Year Plan" period, the construction of ultra-high voltage, ultra-high voltage power grids and smart grids will drive the market demand for high-end products in the field of power transmission and transformation and further accelerate the process of technological innovation in the high-voltage switch industry.
Independent innovation capability is continuously enhanced
In recent years, the state has vigorously promoted the localization of major equipment manufacturing. As an important device that plays a controlling and protective role in the operation of the power system, the high-voltage switch manufacturer's awareness of technological innovation has been further enhanced, and the product technology level has been continuously improved.
Some industry experts said that the domestic high-voltage switch industry has formed a medium-voltage product system dominated by vacuum switches and a high-voltage and ultra-high-voltage product system dominated by sulfur hexafluoride circuit breaker (GIS) equipment. 2. The manufacturing capacity has been continuously improved.
At the same time, with the country's emphasis on localization, the proportion of domestic power grid construction using domestic equipment is gradually increasing, and the proportion of imported equipment is correspondingly reduced, which also provides better development opportunities for high-voltage switch manufacturing enterprises.
In the past ten years, major breakthroughs in high-voltage sulfur hexafluoride self-energizing arc extinguishing technology, research and development of important core technologies and key components such as 500kV single fracture GIS, have laid a good foundation for the independent development of 1100kV AC complete switchgear. technical foundation. At present, domestic vacuum switches have developed to high voltage, large capacity, and high reliability. The upgrading and development of AC, DC ultra-high voltage technology has the tendency to come later.
In 2010, the world's first 1100kV / 6300 ～ 63000A circuit breaker successfully passed all breaking tests at the National High-voltage Electrical Apparatus Quality Supervision and Inspection Center, announcing a major breakthrough in the field of UHV large-capacity circuit breaker testing in China, marking that China has become the world The first country in the world to be able to carry out all 1100 kV / 63 kA circuit breaker breaking tests.
In terms of formulating industry standards, in 2010, the high-voltage switch industry has issued and implemented three mandatory countries, including GB17467-2010 high-voltage / low-voltage pre-installed substations, GB25284 12 ～ 40.5kV high-voltage AC automatic reclosers, and GB 25081 high-voltage live display devices. standard.
Today, three substations of the first domestic 1000kV Jindongnan-Jingmen UHV AC pilot demonstration project developed by the three leading companies-Xi'an Xikai High Voltage Electric Co., Ltd., Shenyang High Voltage Switchgear Co., Ltd. and Pinggao Electric Group, respectively. The complete set of switchgear has been operating stably for more than a year. It has played a significant comprehensive benefit and laid the foundation for the subsequent domestic production of UHV equipment.
It is reported that the current high-voltage switch industry due to high technical, capital and qualification requirements, resulting in the industry showing high barriers and high profits. In the process of competing with foreign brands, several domestic high-voltage switch manufacturing companies are stepping up research and development of new products, accelerating technological transformation, and constantly improving production capacity and product quality in the fierce competition of "internationalization of the domestic market."
Analysts pointed out that starting from the "Twelfth Five-Year Plan", the investment in the electrical equipment industry will show a "dual polarization" trend in the next five years: UHV backbone networks and distribution network transformation will become the theme of grid investment, and "intelligence" will drive secondary equipment As the proportion increases, the high-performance high-voltage switch market will also achieve large-scale development in this process.
According to the data, 9 lines will be built in the "Twelfth Five-Year Plan" UHV DC with a total investment of 217 billion yuan; UHV AC has completed the construction of a "three horizontal, three vertical and one ring network", and the investment is optimistically estimated to reach 298.9 billion yuan. It is estimated that the investment of UHV DC converter stations is 101.4 billion yuan, and the investment of UHV AC substations is 122.5 billion yuan. DC equipment converters and converter valves account for more than 50% of equipment. GIS switches and AC transformers are the focus of development.
Wu Huaiquan, a well-known expert in the high-voltage switch industry and the director of Xi'an High-voltage Electrical Research Institute, said in an interview with the media that in the future, UHV, environmental protection, intelligence, miniaturization and diversification will become the development trend of the high-voltage switch industry.