Power transformer manufacturing enters an era of energy saving and environmental protection

At present, improving energy efficiency and reducing energy consumption have become the direction of industrial development. In the process of power grid construction, transformers play a very important role. Power transformers are the key electrical equipment for power transmission, and transformer self-consumption accounts for 30% to 40% of the power grid losses.

In order to make the transformer effective energy-saving, China began implementing the national mandatory standard "Limited value and energy efficiency rating for power transformers" on July 1. Zhao Yuejin, senior engineer of China National Institute of Standardization, stated: “After completing the replacement of transformers, we will calculate the total energy savings of 70 billion kWh, equivalent to 32 million tons of standard coal, based on the economic operation period of transformers (20 years). This will reduce carbon dioxide emissions by 69 million tons and reduce sulfur dioxide emissions by 3.9 million tons. This will increase the competitiveness of power transformers in the international market."

For transformer manufacturers, integrating energy conservation and environmental protection concepts into product design, raw materials, and manufacturing processes to provide customers with green products is already the only way for product development.

The energy saving and environmental protection of transformers, on the one hand, requires the effective reduction of energy consumption and noise during operation. On the other hand, the use of raw materials such as copper, iron, oil, and insulation must be minimized to avoid excessive waste of non-renewable resources. If various technical parameters of the transformer are accurately calculated in the design process, the iron core and the conductor are preferably selected to determine a suitable proportion of copper and iron so that the conductor produces a smaller eddy current, and the additional loss of the core and the structural component is controlled as low as possible. This can effectively reduce the amount of copper and silicon steel used, while reducing load loss. The use of high-permeability, low-loss imports of high-quality silicon steel sheet to manufacture iron cores can ensure that the transformers have low no-load loss and low noise performance from raw materials.

In addition, advanced technology is also essential for the manufacture of energy-saving and environmentally friendly transformers. Such as reasonable coil design, extensive use of transposition conductors to manufacture low voltage and large current coils, complete transposition between common conductors, effectively reduce coil eddy current loss and circulation loss; advanced sealing structure design, use of high quality sealing components, strict sealing The accuracy of the processing of the metal parts, welding surface using double-sided welding process, strict oil tank inspection process, the maximum control of the transformer during the operation of the oil leakage.