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At present, the development of dry-type transformers in China is about 15%-20% in large and medium-sized cities, and in Beijing, Shanghai, Guangzhou, Shenzhen and other cities, it accounts for about 50%, but due to the distribution in rural areas of China. The use of dry-type transformers in the power grid is relatively small, so overall, dry-type transformers account for between 10-15% of transformer applications.
Although China's market share is relatively low, due to its excellent application conditions and performance, the proportion of dry-type transformers in total transformer output will increase to a certain extent. It is estimated that by 2020, China's dry-changing market share will reach 50%, which is equivalent to the current developed countries. Therefore, China's dry-changing market still has a long way to go.
China's dry-change technology has reached the world's advanced level. The forward-looking industrial research institute "2013-2017 China dry-type transformer industry market demand forecast and investment strategic planning analysis report" shows that dry change has four structures: epoxy resin casting, filling Pouring, wrapping, dipping. At present, the open-ventilated H-class dry-type transformer is widely used in Europe and the United States. It is a new type H dry change that has been developed on the basis of impregnation and has been developed using Nomex paper. Due to its high price, it is in China. Not yet promoted.
At present, the domestic dry distribution transformer with the largest capacity through short-circuit test is 2500kVA, 10/0.4kV; the dry-type power transformer with the largest capacity through short-circuit test is 16000kVA, 35/10kV.
In 2012, China's dry-type transformer production was 18,607,900 kVA, which is one of the countries with the largest production and sales of dry-type transformers in the world. Dry-type transformers are now widely used in almost all electrical equipment such as power stations, factories, and hospitals. With the low noise (2500kVA distribution transformer noise has been controlled within 50dB), energy-saving (no-load loss reduced by 25%) SC (B) 9 series of popularization and application, making China's dry-type transformer performance indicators and manufacturing Technology has reached the world's advanced level.
Although the development of dry-type transformers in China is still very long, under the guidance and development of policies and technologies, dry-type transformers will certainly broaden the market and gradually have a place in the international market.
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Jiangsu Huachen Transformer Co., Ltd.
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