On February 10, 2026, the world’s first 10 kV/1 Mvar air-core toroidal superconducting shunt reactor was officially commissioned at the 35 kV Gulong Substation in Shanghai. This cutting-edge device effectively addresses the challenge of reactive power compensation in urban power grids. Compared to traditional equipment, it boasts a remarkable reduction in size—over 60% smaller—while operating at noise levels below 60 decibels. It is anticipated to see widespread adoption in scenarios including the renovation of aging urban substations and the construction of new ones.
