Combined power traction converter load testing device

The utility model discloses a combined testing device of an electric locomotive, a traction converter electric drive load testing device which is used for an electric multiple unit and the traction converter electric drive load testing device which is used for urban rail transit. The device consists of a transformer, a single-phase four-quadrant rectifier, an inverter, a traction electric unit, a tested AC-DC-AC traction converter, a tested DC-AC traction converter and a tested three-phase full wave rectification device. Wherein the transformer consists of three single-phase transformers, the inverter and the traction electric unit are totaled to be four sets, the four-quadrant rectifier consists of three sets of single-phase four-quadrant rectifiers, one set of the single-phase four-quadrant rectifiers can be taken apart and divided into two parts, and the two parts can be combined with the other two sets of single-phase four-quadrant rectifiers to form two sets of three-phase four-quadrant rectifiers to meet the load testing of the electric locomotive, the electric multiple unit single-phase AC-DC-AC traction converter and the urban rail vehicles DC-AC traction inverter. Thereby, the utilization ratio of the load testing device is increased, the testing cost is decreased greatly.