The development is part of China’s efforts to create energy-rich regions and transmit power from areas of surplus to centers of high demand.

The corridor will use high-voltage direct current (HVDC) technology to maximize transmission efficiency. ABB’s transformers will serve the stations that convert power to direct current for transmission and back to alternating current for distribution, and will be supplied in cooperation with local Chinese partners.

Each converter transformer is extremely large, weighing over 500 tons. This presents challenges that will be addressed by technical solutions like reducing the width of the transformers for the Ningxia station, located in a remote and mountainous area, so that they can be transported by rail.