The development trend of low-voltage circuit breakers

In 2011, the country’s newly installed power generation capacity was 90.41 million kilowatts, exceeding 90 million kilowatts for six consecutive years. Among them, 12.25 million kilowatts of new hydropower, 58.86 million kilowatts of thermal power (including 52.02 million kilowatts of coal-fired units with a unit capacity of 300,000 kilowatts and above, accounting for 95.3% and 88.4% of the capacity of newly commissioned coal-fired units and thermal power units), nuclear power 1.75 million kilowatts, 15.85 million kilowatts of grid-connected wind power, and 1.69 million kilowatts of grid-connected solar power, and grid-connected solar power has entered the stage of large-scale production. At the end of the year, the national installed capacity of power generation reached 1.056 billion kilowatts, of which 231 million kilowatts of hydropower (including 18.36 million kilowatts of pumped storage), 765 million kilowatts of thermal power, 12.57 million kilowatts of nuclear power, 45.05 million kilowatts of grid-connected wind power, 2.14 million kilowatts of solar power, and national electricity The supply capacity is further enhanced.

At the end of 2011, the national installed capacity of non-fossil energy power generation such as hydropower, nuclear power, grid-connected wind power, and grid-connected solar power reached 290 million kilowatts, accounting for 27.5% of the total installed power generation capacity, an increase of 0.9% over the previous year. The national installed capacity growth rate is 2.5 percentage points lower than the growth rate of power generation, while the growth rate of thermal power equipment capacity is 6.2 percentage points lower than the growth rate of thermal power generation. Increase. The trend of installed power generation capacity shifting to the west is obvious. By the end of the year, the installed capacity in the west, northeast, central, and eastern regions increased by 14.5%, 7.8%, 7.3%, and 6.4%, respectively, and the growth rate of installed capacity in the east and central regions was lower than the growth rate of the corresponding application power. 3.2 and 4.8 percentage points. In the case of the power grid's weak cross-regional resource allocation capability, the power supply and demand in the eastern region is even more tight.

From 2012 to 2016, the country’s newly installed capacity during the 12th Five-Year Plan period will exceed 500 million kilowatts. “At the end of the 12th Five-Year Plan, my country’s annual hydropower generation capacity will reach 900 billion kilowatt-hours, equivalent to 300 million tons of standard coal, and annual wind power generation capacity. It will reach 190 billion kilowatt-hours, equivalent to 60 million tons of standard coal. In addition, the total utilization of solar energy (including power generation and water heaters, etc.) will also be equivalent to 50 million tons of standard coal. my country will add 66 billion to 77 billion kilowatt-hours of electricity each year. .

Statistics show that the market size of my country's low-voltage circuit breaker industry in 2011 was 40 billion yuan. In the next few years, with the continuous growth of my country's new power generation and the rapid development of other downstream industries, the domestic market's demand for low-voltage circuit breaker products will continue to grow. Therefore, the market scale of my country's low-voltage circuit breaker industry will also grow rapidly. It is expected that By 2016, the market size of my country's low-voltage circuit breaker industry will be close to 80 billion yuan.

From the end of the 20th century to the beginning of the 21st century, major foreign companies have successively introduced new ACB and MCCB, and have been continuously improved and expanded. They have made major breakthroughs and innovations in terms of main technical performance, product structure, and new technology applications. . Among them, the German Siemens** is prominent. Its low-voltage electrical appliances that can communicate can form a very large industrial system, power distribution monitoring system and building automation system; the MDU series circuit breaker developed by Mitsubishi Corporation can directly realize electric energy Monitoring network system, equipment monitoring network system, etc.

Low-voltage electrical appliances are widely used in various industries in the national economy and are closely related to the fixed investment situation of the whole society. 21 Actually, it was a period of rapid development of China's low-voltage electrical appliance industry. The growth rate of my country's low-voltage electrical appliance industry has remained at 10%-15% in recent years. The market capacity of the low-voltage electrical appliance industry is closely linked to the development of the power, industry, real estate, and telecommunications industries. Together with the structural adjustment of the demand for low-voltage electrical appliances and the potential demand of the international market, it provides a broad space for the future development of the low-voltage electrical appliance industry.

During the "Twelfth Five-Year Plan" period, with the advancement of smart grid construction and the continuous development of low-voltage electrical appliances production technology, a new generation of low-voltage electrical appliances featuring intelligence, modularity, and communication capabilities will become mainstream products in the market. The **-generation products will be withdrawn from the market in 2010, the second-generation products will become low-end products, and the third-generation products and some second-generation products will become mid-end products. From 2011 to 2015, the smart grid will enter a comprehensive construction stage in seven aspects, including power transmission, transformation, distribution, and communications, and the total investment in smart grid construction will be close to 2 trillion yuan. In early 2011, the State Council decided to implement a new round of rural power grid transformation and upgrading projects. The new round of rural power grid transformation projects will bring important development opportunities to the low-voltage electrical industry. From the perspective of various economic policies and institutional analysis and forecasts, the power system infrastructure will continue to maintain a large investment scale in the next few years, so the low-voltage electrical appliance industry will also be in a stable development stage, but domestic and international market competition will become fierce.

With the research hotspots caused by smart grids at home and abroad, the "intelligence" and "communicable" of low-voltage electrical appliances will eventually develop in the direction of smart grids, forming a low-voltage user-side industry of smart grids. The goal of the smart grid is to achieve reliable, safe, economical, high-efficiency, environmentally friendly and safe use of the grid. The low-voltage user end of the smart grid also has the characteristics of reliability, safety, economy, and efficiency. To build a smart grid, it is inseparable from being a power grid. The basic low-voltage power distribution system and low-voltage electrical components are intelligent and communicable. The core devices that play a control and protection role include universal circuit breakers, molded case circuit breakers, etc., and the intelligence and communicability of these devices have naturally become The development trend of low-voltage electrical appliances industry.

In view of the accelerated expansion of international ** companies in my country, the adjustment of their strategies for China, the new round of asset reorganization and resource integration, etc., it will have an impact that cannot be underestimated on the adjustment of the industrial structure and future development of my country's low-voltage electrical appliance industry. With the rise of the smart grid, the high-end, mid-to-high-end low-voltage electrical appliances produced by my country's low-voltage circuit breaker companies will move closer to the smart grid, and will gradually form the low-voltage end of the smart grid, becoming a new growth point for the low-voltage electrical industry.