China's electric power science and technology field ushered in a historic leap, a major breakthrough in quantum sensing technology was released. Recently, the world's first ±72 kV UHV DC quantum current sensor successfully completed more than 0 hours of stable operation test at the Liuzhou converter station of Kunliulong DC Project.

This milestone achievement was achieved by China Southern Power Grid Corporation and more than 20 units including the Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, after a year and a half of close cooperation and unremitting efforts. The research team has overcome a series of world-class technical difficulties, such as quantum state manipulation and extreme environment encapsulation, and demonstrated outstanding innovation and scientific research strength.

The sensor takes full advantage of quantum properties and enables unprecedented technological innovations. It works stably in extreme temperatures, whether it's -10°C cold or +0°C heat. The sensor also shows excellent measurement performance, covering an ultra-wide range from milliamps to 0 kiloamps, and is the first to apply quantum precision measurement technology to a conventional industrial temperature range.

Compared with traditional sensors, this quantum sensor has nearly 4 times higher measurement accuracy, and can monitor the no-load and heavy-load status of the DC transmission system with high accuracy around the clock, and send back data in real time. This breakthrough marks that China's DC transmission system has officially entered a new era of "quantum precision", and provides a strong technical guarantee for the safe and stable operation of the power system.

This breakthrough in quantum sensing technology not only brings revolutionary changes to the power industry, but also opens up a broad space for the wide application of quantum technology in the industrial field. In the future, this technology will play an important role in the construction of new power systems, providing new solutions to solve problems in key areas such as AC and DC hybrid control, equipment status monitoring, and new energy grid integration.

From materials to sensors, from power equipment to power grid operation, to new energy development, the industrial chain of quantum sensing technology covers the key links of the entire energy industry. As this technology continues to mature and be applied, it will become an important technical support to promote the global energy transition and lead the power industry towards a smarter, more efficient and more sustainable future.