Abstract
The traditional rail transit traction power supply system is susceptible to extreme environmental conditions, resulting in a decrease in its safety and reliability. The contactless power supply technology solves the problems caused by the contact between the electric locomotive and the traction network and provides significant advantages for the new rail transit power supply technology. Inductively coupled power transfer (ICPT) technology has become the best choice for contactless power supply technology for rail transit because of its large transmission power and suitable transmission distance. The bidirectional ICPT system solves the traditional traction power supply problem, and can also return the regenerative braking energy of the electric locomotive to the traction net to achieve peak cutting and valley filling, and achieves energy-saving operation. This paper reviews the commonly used topologies, control methods, modeling and optimization methods and looks forward to the application of these key technologies in rail transit applications at the future.
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