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Although energy-saving transformers have very prominent advantages in technical performance, China is also currently vigorously promoting the popularization phase, but in terms of market acceptance, it is not optimistic.
Power transformers are the key electrical equipment for power transmission. Transformer losses account for 30% to 40% of grid losses, while all transformers in China account for more than 3% of national electricity generation. Therefore, the state has been focusing on energy saving and consumption reduction of transformers, and vigorously promoted energy saving and emission reduction.
As early as August 21, 2012, the State Council issued a detailed draft of the 12th Five-Year Plan for Energy Conservation and Emission Reduction, which clarified the specific goals and investment plans for energy conservation and emission reduction during the 12th Five-Year Plan period, and required power transformer losses to be reduced during the 12th Five-Year Plan period. Among them, the no-load loss is reduced by 10% to 13%, and the load loss is reduced by 17% to 19%.
On November 6, 2012, the Ministry of Finance, the National Development and Reform Commission, and the Ministry of Industry and Information Technology issued Caijian  No. 854, "Implementation Rules for the Promotion of Energy-efficient Products to Benefit the People's Projects, and the Implementation of High-efficiency Energy-Saving Distribution Transformers." The "Implementation Rules" are divided into 7 parts: the scope and conditions of the promotion products, the conditions of the promotion enterprises, the promotion period, the promotion subsidy standards, the promotion qualification application, the subsidy fund application and payment, and the penalty rules. Oil-immersed transformers with no excitation voltage regulation, energy efficiency class 2 and above, rated capacity of 30 kVA to 1600 kVA, and dry type transformers with rated capacity of 30 kVA to 2500 kVA.
In fact, transformer energy efficiency standards are one of the key points of power standardization. In 2005, the power industry introduced guidelines for the technical and economic evaluation of energy efficiency in industry-standard distribution transformers, which played a positive role in promoting the replacement of old transformers and reducing energy efficiency. Fortunately, the current 10kV three-phase distribution transformer energy efficiency standard has been submitted for approval; the distribution transformer energy efficiency technical and economic evaluation guidelines have been implemented from July 1 this year; the transformer environmental awareness design guidelines since June 1 this year From implementation.