Analysis of Development Trend of Transformer Manufacturing Industry in China
With the rapid development of China’s economy and the continuous increase in power demand, transformers as major equipment in power transmission and transformation systems have also achieved considerable development. In order to meet and meet market demands, many transformer manufacturers have continuously improved the product structure, improved product performance, introduced advanced production technology and equipment from abroad, and strengthened the exploration of new materials and technologies. Its development presents the following trends:
(I) Development to large capacity, high voltage, and high reliability
At present, transformer products are divided into high-end transformers, 220-500kV transformers, 110-200kV transformers, and transformers less than 110kV according to voltage levels. The higher the voltage level of the power transmission and transformation lines, the greater the power transmission and transformation capacity, and therefore the overall development direction of the transformer is that the voltage level will be developed to 750 kV and 1000 kV. The main application is in long-distance transmission and transmission lines; the capacity is three-phase 120 MVA-840 MVA, Even 900MVA, single phase development from 250MVA-400MVA, even 533MVA. Because these transformers are generally used in large-scale power plants or power transmission, their reliability is crucial.
(b) To environmental protection development
With the continuous improvement of national environmental protection laws and the awareness of environmental protection among the public, the construction of substations, especially the construction of urban substations, is increasingly restricted by environmental protection. Among them, the energy consumption, noise and electromagnetic fields generated during the operation of transformers and reactors are all environmental impact factors that should be taken into consideration in the design of substations, distribution network layout, or environmental protection evaluation. For this reason, transformers are required to be environmentally friendly, which is mainly reflected in the following four aspects: energy saving, low noise, non-infiltration, and biodegradable recycling.
(III) Development towards miniaturization and portability
Today’s power supply products are generally characterized by “lightness, thinness, shortness, and smallness,” and are becoming smaller and portable. For example, electronic transformers must adapt to the volume and weight requirements of the user’s power supply product. At the same time, the prices of raw materials (core materials and conductive materials) for electronic transformers have risen. Therefore, how to reduce the volume and weight and how to reduce the cost has become the main direction for the development of electronic transformers in the future.
Energy-saving, miniaturization, low-noise, high-impedance, explosion-proof development of these products mainly in small and medium-sized products, such as the new S9-type distribution transformers that are currently recommended for urban network and rural power network reconstruction, as well as rolled iron cores. , amorphous alloy, fully sealed, combined, dry, high ignition oil, SF6 gas insulation and other transformers.
(d) Development of transformers for urban networks to high impedance
Urban transformers should have high reliability and energy saving, environmental protection, low noise, and miniaturization. Substations in cities are sometimes individually designed, thus affecting the structure and shape of the transformer, and even the cooling methods and types.