A 61.6dB(A) ultra-low-noise, large-capacity UHV reactor has been launched.

China has achieved a breakthrough in developing a low-noise UHV reactor for transformers. The product passed type testing, witnessed by experts from the my country Electric Power Research Institute, with a measured noise level of just 61.6dB(A).

Partial discharge was also kept below 10pC, with a minimum peak-to-peak amplitude of 5 microns.

These figures mark a new global record for low-noise technology in large-capacity UHV reactors.

The reactor features a dual-body design with direct-connected leads and oil-immersed, self-cooling technology. This product utilizes core technologies, including research and development results in vibration and noise reduction. By systematically suppressing vibration sources, isolating noise propagation, and damping vibration and acoustic waves, it effectively addresses long-standing engineering challenges associated with reactors, including high amplitude, high noise, and localized overheating.

This breakthrough is significant because, as core equipment in high-voltage transmission systems, reactors have long faced challenges worldwide in terms of vibration, noise, and overheating due to their unique structure. These challenges are particularly significant in meeting my country's environmental protection requirements.

This breakthrough has eliminated the need for external soundproofing enclosures for UHV equipment during actual operation, resolving noise pollution issues while also saving equipment costs and installation space.

This technological breakthrough in transformers stems from an innovative spirit that dares to challenge established standards.

During the R&D phase for enhanced power sand filling experiments, experts generally believed that finer sand was better, but our technicians persisted in experimenting with sand of varying particle sizes.

After extensive testing, they discovered that sand with appropriate gaps in the sand actually achieved greater noise reduction. This approach, based on experimental data rather than blindly adhering to conventional wisdom, laid the foundation for the current technological breakthrough.

The low-noise UHV reactor that passed this test will be used in my country's UHV power grid construction. Similar low-noise reactors, which entered operation in early 2025, are already in use in the western Sichuan UHV ring network, providing critical support for the "West-to-East Power Transmission" strategy. Compared to earlier products, the new reactor not only further reduces noise levels, but its systematic and innovative solution also provides key technical support for my country's efforts to build a green power grid and a new power system.

This technological breakthrough not only solves engineering problems such as vibration, noise and local overheating that have long plagued the industry, but also provides key support for my country to build a green power grid and new power system.