China's transformer industry mainly develops in two directions: First, it develops in the direction of high-voltage and ultra-high voltage, mainly 750 kV and 1100 kV transformers, which are mainly used in long-distance transmission and distribution lines; second, it is intelligent and energy-saving. In the direction of miniaturization, it is mainly used in urban and rural power transmission and distribution lines. Recently, Wang Dehua, deputy general manager of Xi'an Xidian Transformer Co., Ltd., said in an interview with a reporter from China Electric Power. However, energy-saving transformers are faced with constraints such as standard systems, technical bottlenecks, and high costs in terms of promotion.

Power transformers are the key electrical equipment for power transmission. Transformer losses account for 30% to 40% of the power grid losses, while all transformers in China account for more than 3% of the national power generation. With the continuous deepening of China's energy-saving policy, some of the high-energy-dissipation distribution transformers currently in operation on the Internet do not meet industry development trends, and are faced with the need for technological upgrades and replacements. In the future, energy-saving, material-saving, and environmental protection will gradually be adopted. Replaced by a low noise transformer.

Energy-saving transformers are the trend of the times In recent years, with the rapid development of China's electric power construction, the demand for transformers has increased rapidly, resulting in a considerable part of the domestic transformer enterprises to rapidly expand production capacity, and even double the production capacity of individual enterprises. According to statistics, there are about 1,500 transformer manufacturing enterprises in China, with an annual production capacity of about 3 billion kVA, and in the past three years, the annual demand for transformers in China is at most about 1.5 billion kVA.

Overcapacity leads to fierce competition. Many companies have turned into a vicious circle of low-cost bids. The decline in the quality of transformer products and the increase in the accident rate have often been criticized by the industry. In the fierce competition environment, the economic efficiency of domestic transformer enterprises has dropped significantly. Many companies are on the verge of loss or bankruptcy, and face the fate of mergers and reorganizations; some companies have begun to take overseas routes, export products, and establish factories abroad; some companies have started to develop New, energy-saving, environmental protection and intelligent products. Wang Dehua said.

With the increasingly stringent energy conservation and consumption reduction targets, whether in the global market or in the Chinese market, both developed and developing countries will focus on energy-saving transformers, and energy-saving transformers will usher in large-scale applications. . Energy-saving transformers sang the main theme of power development.

The 18th National Congress just concluded clearly stated that beautiful China and Green China will be the main theme of the coming period, and energy-saving transformers will follow the development of the times. From the perspective of the development of transformer energy-saving technology, China's transformers have gone through several series of alternative processes such as S7S8S9S10S11. The distribution transformers already have the needs of S13 and SH15-type products. Currently, S9-type products are still in heavy use. The product market with more energy-saving effects above S10 is growing. In the promotion of energy-saving products, because the sales price of the product is higher than the price of the S9 product, the price is still the main factor affecting the popularization and promotion of the energy-saving transformer. However, with the development of economy, especially the users with lower transformer load rate in rural power grids, the demand for the above energy-saving products has gradually increased, and large-scale adoption of S13 and SH15-type products has started in the transformation of national urban networks and rural power grids. Load loss is 50%~80% lower than S9 transformer.

The promotion and application are faced with many difficulties. On the one hand, it is the strong market demand for energy-saving transformers. On the other hand, the current situation of the scattered distribution of energy-saving and distribution transformers, coupled with low barriers to entry, poor and good companies, lack of definition and standards, technical bottlenecks, and high prices, The constraints of insufficient subsidies and other factors have led to the slow promotion of energy-saving transformers in China.

At present, there are certain difficulties in the promotion of energy-saving transformers, and the most critical is that there are some technical defects. For enterprises, there is a need to increase costs; for users, the price is too high. Wang Dehua believes that at present, there is a lack of a unified definition and definition of energy-saving distribution transformers. It is urgent to define the definition of a unified energy-saving distribution transformer and define its substantive technical indicators. These indicators should be quantified and refined as much as possible, and in particular, they must be operable. Further improve the national standard for energy-saving transformers and keep up with the international pace.

Industry experts also pointed out that due to the short use time of energy-saving distribution transformers, there are some issues that are controversial and can not be fully accepted by users. For example, amorphous alloy distribution transformers have poor performance stability, poor resistance to short-circuiting, and noise and loss after operation. Increase and so on. Testing standards and testing technologies lag behind product development, and lack of product performance evaluation and rating systems and tools that can reflect different design levels and manufacturing processes.

In response to these problems, the experts proposed to carry out in-depth research on the operation of energy-saving distribution transformers, especially the development of distribution transformers based on domestic amorphous alloy strips, from the strip performance, core structure design, core annealing process and finished products. Inspection, performance, efficiency and pre-assessment of energy consumption are integrated to eliminate user concerns and focus on solving problems such as increased noise and loss of amorphous transformers after operation. In addition, starting from improving the properties of strips, especially the properties of domestic strips, we will unify and standardize strip sizes, increase the yield of amorphous alloy strips, and reduce the cost of energy-saving distribution transformers.