The largest natural ester insulated oil transformer in China has passed all test items in one go, with excellent performance indicators. This transformer is independently developed by Shandong Electric Power Equipment Co., Ltd., a subsidiary of Shandong Electric Group Co., Ltd. It is also the first 110 kV/63000 kVA natural ester insulated oil transformer in Shandong Province. The successful development of this product has achieved a leap from small capacity to large capacity of natural ester insulated oil transformers in China, marking another major breakthrough in Shandong's research and development of new power equipment products!

As the "blood" of power transformers, the insulation and heat dissipation properties of insulating oil are the key factors determining the long-term safety and stability of transformers. Natural ester insulating oil is a high ignition point, environmentally friendly and renewable liquid insulation medium. Its ignition point is higher than 300 ℃, its heat resistance level is K level, and its natural degradation rate can reach over 97%. Natural ester insulated oil transformers have excellent performance such as long life, high overload, green environmental protection, and fire safety.

Shandong Electric Power Equipment Company has initiated the research and development of natural ester insulation oil transformers. The project development team has conducted in-depth and detailed technical exchanges with domestic and foreign experts multiple times. By combining simulation software with physical model tests, they have conducted in-depth research on the characteristics of natural ester insulation oil transformers, such as withstand voltage impact, dielectric loss, and partial discharge. They have overcome technical difficulties such as insulation structure optimization design, natural ester insulation oil transformer oil treatment technology, compatibility between natural ester insulation oil and materials, and production and manufacturing processes of natural ester insulation oil. Finally, the project was successfully developed.

It is reported that natural ester insulated oil transformers have been successfully applied in some developed countries in Europe and America, but in China, the research and application of high-voltage and large capacity natural ester insulated oil transformers are still in their infancy. This successful development has broken the monopoly of foreign natural ester insulated oil transformers in the domestic and international markets, established Shandong Equipment Company's leading position in the production and research and development of large capacity natural ester insulated oil transformers, enhanced the company's market competitiveness and brand influence, and laid a solid foundation for the development of larger capacity and higher voltage level natural ester insulated oil transformers in the next step.