Motor train unit alternating-current and direct-current line side circuit and control method thereof

Abstract

The invention discloses a motor train unit alternating-current and direct-current line side circuit and a control method thereof. The motor train unit alternating-current and direct-current line sidecircuit comprises two power supply units, a high-voltage cable and a high-voltage isolating switch. Each power supply unit comprises a pantograph, an alternating-current and direct-current detection device, an alternating-current vacuum circuit breaker, a main transformer, a converter, a grounding device, a first alternating-current and direct-current change-over switch, a direct-current circuit breaker and a second alternating-current and direct-current change-over switch. The pantographs are connected with traction motors through the alternating-current and direct-current detection devices,the alternating-current vacuum circuit breakers, the main transformers and the converters. One end of each first alternating-current and direct-current change-over switch is connected between the corresponding alternating-current and direct-current detection device and the corresponding alternating-current vacuum circuit breaker, and the other end of each first alternating-current and direct-current change-over switch is connected with one end of the corresponding direct-current circuit breaker. The other end of each direct-current circuit breaker is connected with the corresponding main transformer and a first fixed end of the corresponding second alternating-current and direct-current change-over switch. A second fixed end of each second alternating-current and direct-current change-overswitch is connected between the corresponding alternating-current vacuum circuit breaker and the corresponding main transformer. Movable ends of the second alternating-current and direct-current change-over switches are connected to the high-voltage cable. The motor train unit alternating-current and direct-current line side circuit and the control method are simple in structure, reliable in control and capable of conducting rapid switching between the alternating-current power supply mode and the direct-current power supply mode.

Description

technical field [0001] The invention particularly relates to an AC / DC network side circuit of an EMU and a control method thereof. Background technique [0002] The grid-side power supply system is the key system of the train, and the quality of the main circuit design of the grid-side power supply system is one of the important conditions for the quality assurance of the train. With the development of EMU technology, EMUs using a single power supply system in the traditional sense, such as using AC 25kV power supply or DC 3000V power supply, can only apply to a single power supply line. For some regions without a unified power supply system, such as the EU region, different power supply systems exist in different regions of the same country. There are also vehicles in a certain country that need to run to other countries, but the power supply systems of different countries may also be inconsistent, so there is a strong demand for EMU vehicles to adapt to different pantogra...

AI Technical Summary

Problems solved by technology

Although 201510518959.9 AC-DC conversion control circuit for dual-current braking train sets announced a dual-current conversion circuit for EMUs, it only focuses on the detection of AC and DC vehicles, but it does not provide for the multi-current power supply main circuit of EMUs. feasible solution

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