A dual-source power supply system and a dual-source power engineering vehicle

Abstract

The invention discloses a dual-source power supply system and a dual-source power engineering vehicle. The dual-source power supply system comprises a main circuit for power supply of an overhead contact system, a main circuit for power supply of a traction battery, a rectifying module, an inverter module and an auxiliary inverter module, a power supply switching device for receiving a power supply command of the overhead contact system or a power supply command of the battery, and a controller; The dual-source power supply system will not emit polluting gas, so as to meet the low-emission environmental protection requirements of urban rail. Moreover, the dual-source power supply system can be applied to the two power supply modes of the catenary and the traction battery, and the automaticswitching of the two power supply modes can be realized by using the switching instruction of the power supply switching device and the controller. Therefore, when there is a power area, the application can select the power supply mode of the catenary (power supply mode satisfying the power supply mode of the national railway and AC-DC-AC power supply system), which saves power and has higher efficiency; As that power-free zone is entered, the application can be switch to the traction battery power supply mode, and the electric engineering vehicle can still work normally and has high reliability.

Description

technical field [0001] The invention relates to the field of rail transit electric traction engineering vehicles, in particular to a dual-source power supply system and a dual-source electric engineering vehicle. Background technique [0002] With the development of rail transit, urban railway (also known as urban rail transit, that is, a traffic system between the national railway and urban rail transit such as station distance and speed target) is more and more widely used, and as an urban railway maintenance Electric power engineering vehicles for maintenance and urban vehicle rescue have also gradually developed. In the prior art, some electric engineering vehicles use diesel locomotives. However, diesel locomotives use diesel engines as power, which has a low energy utilization rate and emits a large amount of polluting gases into the working environment, thereby endangering the health of workers and failing to meet Low-emission environmental protection requirements fo...

AI Technical Summary

Problems solved by technology

In the prior art, some electric engineering vehicles use diesel locomotives. However, diesel locomotives use diesel engines as power, which has a low energy utilization rate and emits a large amount of polluting gases into the working environment, thereby endangering the health of workers and failing to meet Low-emission environmental protection requirements for urban rail

Some electric engineering vehicles use the power supply method (DC-AC power supply system), but the DC-AC power supply system is more expensive and less efficient, and the above two power supply methods cannot meet the national railway power supply system

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