The appraisal of scientific and technological achievements of the rail transit three-dimensional wound core traction rectifier transformer has been successfully completed

On October 30, 2021, the cooperation between Haihong Electric Co., Ltd. (hereinafter referred to as Haihong Electric) and Guangzhou Metro Group Co., Ltd., hosted by the Guangdong Machinery Industry Association, "New Urban Rail Transit Traction Rectifier Transformer Based on Silicon Steel Three-dimensional Wound Core Technology" The scientific and technological achievements appraisal meeting of the project "Key Technology Research and Development" and "Research on Key Technology of New Urban Rail Transit Traction Rectifier Transformer Based on Amorphous Alloy Three-Dimensional Wound Core Technology" was successfully held.

Experts from the Appraisal Committee listened to the key technologies and innovations of the project at the meeting, inspected the production site of the project, and highly recognized the technical research level and comprehensive management capabilities of Haihong Electric, and highly affirmed the scientific and technological achievements: the project is aimed at urban rail transit traction In the field of rectification, there are large load fluctuations and high harmonic content and other operating characteristics and performance requirements. The overall technology of the project "Research on the Key Technology of New Urban Rail Transit Traction Rectifier Transformer Based on Silicon Steel Three-dimensional Wound Core Technology" has reached the international advanced level; Wound Core Technology Research on Key Technology of New Urban Rail Transit Traction Rectifier Transformer"Successfully developed the first 35kV open-type traction rectifier dry-type transformer based on amorphous alloy three-dimensional wound core technology at home and abroad, and the overall technology of the results has reached the international advanced level. Alloy three-dimensional wound core technology is at the international leading level. At the meeting, Mr. Gao Zongyao, the former Secretary-General of Guangdong Machinery Industry Association, said that "every time I come to Haihong, I have a new feeling, and I will continue to develop and improve in terms of technological innovation and management standards."

The realization of the strategic goal of "carbon peak, carbon neutrality" requires all walks of life to actively carry out energy-saving and emission-reduction technology innovations. Under the background of energy saving, environmental protection, and green development of the rail transit industry, combined with the electricity environment and needs of urban rail transit, Haihong Electric Co., Ltd. (referred to as Haihong Electric) and Guangzhou Metro Group Co., Ltd. Research and development of the key technology of the new urban rail transit traction rectifier transformer and the research and development of the key technology of the new urban rail transit traction rectifier transformer based on the amorphous alloy three-dimensional wound core technology.

Based on silicon steel/amorphous alloy three-dimensional wound core technology research on key technologies of new urban rail transit traction rectifier transformers, a 35kV silicon steel/amorphous alloy open three-dimensional wound core traction rectifier dry-type transformer was developed. The cores are made of silicon steel and amorphous alloy strips material. A hybrid insulation system composed of a three-dimensional wound core structure, NOMEX? aramid insulating paper, PIF polyimide film and one-component environmentally friendly insulating varnish from Germany Elentas has significantly improved energy saving effect and higher operating stability. It is conducive to the green development of urban rail transit and ensures the safe operation of urban rail transit.

The performance of ZQSGB-RL-3300/33 open-type three-dimensional wound core silicon steel traction rectifier dry-type transformer is compared with GB/T 35553-2017 energy-saving requirements for urban rail transit electromechanical equipment. The average no-load loss is reduced by about 30%, and the average load loss is reduced by about 21%. %; noise sound pressure level as low as 44dB (A).

The technology of amorphous alloy three-dimensional wound iron core traction rectifier transformer technology for rail transit solves the design and production problems of high-voltage and large-capacity amorphous three-dimensional wound iron technology, and realizes the technological breakthrough of amorphous alloy three-dimensional wound iron core towards higher voltage and larger capacity. The dual energy-saving effect of the three-dimensional wound core structure and the amorphous alloy material is realized, and at the same time, the problems of reliability, noise, and short-circuit resistance of the planar amorphous alloy dry-type transformer are solved. ZQSGBH-RL-3300/33 open three-dimensional wound core amorphous traction rectification dry-type transformer is the world's first amorphous three-dimensional wound core dry-type transformer with the largest capacity and highest voltage. Compared with the energy-saving requirements of GB/T 35553-2017 urban rail transit electromechanical equipment, its energy-saving performance has an average no-load loss reduction of about 67%, and an average load loss reduction of about 17%; the noise sound pressure level is as low as 57dB (A).

The scientific and technological achievements of the two projects successfully passed the appraisal of scientific and technological achievements, which can be widely promoted and applied in the rail transit industry, boosting the technical level of transformers and the level of supporting equipment in the national rail transit industry, and improving the use of rail transit equipment in the country's "Belt and Road" The technical level has far-reaching significance. At the same time, it is of positive significance to the country's energy saving and emission reduction, low-carbon environmental protection and ecological civilization construction, and its economic and social benefits are remarkable.

Innovation-driven development, Haihong Electric will continue to adhere to the development policy of "adhere to independent innovation, promote development with technology, win glory for the country with world technology", continue to advance on the road of research and development of transformer energy-saving technology with the concept of "truthfulness, sincerity and sincerity", and serve The country's high-quality development, energy conservation and emission reduction put forward the "Haihong Plan".