The new version of the national standard for energy efficiency limits and energy efficiency grades of power transformers (GB 20052-2020) will be formally implemented on June 1, 2021. The new version of the standard expands the product range and improves the product's no-load loss and load loss index requirements, reaching the world's leading level, which will play a positive role in promoting energy saving and industrial upgrading of power transformer products.
《 transformer energy Efficiency Limits and Energy Efficiency Grades
this standard revision integrates the two mandatory energy efficiency standards of the original national mandatory standard GB 20052-2013 "Three-phase Distribution Transformer Energy Efficiency Limit Value and Energy Efficiency Grade" and the GB24790-2009 "Power Transformer Energy Efficiency Limit Value and Energy Efficiency Grade", and is planned to be implemented on June 1, 2021.
Power transformers (including transmission transformers and distribution transformers) are widely used electrical equipment in various industries of the national economy. Due to the large amount of use and long running time, transformers have great energy-saving potential in the selection and use of transformers. Reducing transformer losses and improving transmission and distribution efficiency are currently the common concerns of all countries in the world, and it is also the focus of our government's industrial energy-saving work. According to statistics, China's distribution transformer loss accounts for 40% to 50% of transmission and distribution losses, and transmission and distribution losses account for about 6.6 of the country's power generation. Improving the efficiency of the entire distribution transformer system is of great significance for reducing transmission and distribution losses, promoting the transformation and upgrading of industrial development, and achieving national energy conservation and emission reduction goals.
Significance of transformer energy efficiency improvement
the demand and supply of electricity are on the rise, the maximum load continues to rise, and the loss of transmission and distribution in China is also increasing. In China, the loss of distribution transformer accounts for 40% ~ 50% of the loss of transmission and distribution, and the loss of transmission and distribution accounts for about 6. 6% of the national power generation. Based on the total power generation of 6.99 trillion kWh in 2018, the power loss of distribution transformers in the country is about 230 billion kWh, which is equivalent to about 2.3 times the total power generation of the Three Gorges (about 101.6 billion kWh in 2018), and the power loss is very serious.
Improving the efficiency of the entire distribution transformer system is of great significance for reducing transmission and distribution losses, promoting the transformation and upgrading of industrial development, and achieving national energy conservation and emission reduction goals.
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