Energy-saving transformers are the trend

Energy-saving transformers will enter the stage of large-scale promotion "China's transformer industry develops mainly in two directions: First, it will develop in the direction of high-voltage and ultra-high voltage, mainly 750 kV and 1100 kV transformers, mainly used in long-distance transmission and distribution lines. The second is to develop in the direction of intelligence, energy saving, and miniaturization, and 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., was interviewed by a reporter from China Electric Power. Said, but 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 power grid losses, and all transformers in China account for more than 3% of the country’s electricity generation. With the continuous deepening of China’s “energy saving and consumption reduction” policy, some of the high-energy-dissipation distribution transformers currently in operation on the Internet do not meet industry development trends, and are facing the need for technological upgrades and replacements. In the future, energy-saving and material-saving materials will be gradually Replaced by environmentally friendly, low noise transformers.

Energy-saving transformers are the trend

In recent years, with the rapid development of China's electric power construction, the demand for transformers has increased rapidly, leading to a large number of domestic transformer enterprises to rapidly expand their production capacity, and even double the output 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 has led to fierce competition. Many companies have turned into a vicious circle of low-price bids. The decline in the quality of transformer products and the increase in the accident rate have repeatedly been criticized by the industry. Under the fierce competition environment, the economic benefits of domestic transformer enterprises have decreased significantly, and many companies are The edge of loss or bankruptcy faces the fate of mergers and reorganizations; some companies have begun to take overseas routes, export products, and build plants abroad; some companies have begun to develop new, energy-saving, environmental-friendly, and intelligent products,” said Wang Dehua.

In fact, whether in the global market or in the Chinese market, whether in developed countries or developing countries, in the increasingly severe energy-saving and consumption-reducing targets, many people will focus on energy-saving transformers, and energy-saving transformers will usher in a large scale. Promote the application phase.

The "18th National Congress" just concluded has made it clear that "beautiful China" and "green China" are the "main theme" for a period of time in the future. Energy-saving transformers are in keeping with 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. The load loss is reduced by 50% to 80% compared to the S9 transformer.

Promotion and application faces many difficulties

On the one hand is the strong market demand for energy-saving transformers to promote, the other is the current status of the scattered distribution of energy-saving power distribution transformers, coupled with low barriers to entry, enterprises are mixed, lack of definition and standards, technical bottlenecks, high prices, subsidies are not enough, etc. The constraints of factors led to the slow promotion of energy-saving transformers in China.

"At present, there are certain difficulties in the promotion of energy-saving transformers. The most critical point is the technical level. There are some deficiencies at the technical level. For enterprises, there is a need to increase costs; for users, the price is too high." Wang Dehua believes that currently there is a lack of energy-saving distribution transformers. The unified definition and definition of standards. 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.