In urban railways, due to the long power supply cables, repeated start and stop of vehicles among stations in a short distance have a great impact on the power distribution grid, resulting in local voltage drops or rises, which will affect the normal operation of all the vehicles. To avoid this, in practical applications, an grid-connected converter is deployed to absorb energy fluctuations generated in vehicle starting and stopping processes.
One side of the grid-connected converter is connected to the power supply grid, and the other side to the AC grid or directly to the energy consuming equipment. It uses DC/AC conversion or interleaved DC/DC conversion. Generally, 3300V power devices in 2-level architecture or 1700V power devices in I-type 3-level architecture are applied.
Follow us on WeChat
