Inverse control system of trolley locomotive

Abstract

The invention relates to an inverse control system of a trolley locomotive, comprising a pantograph type current collector, a bow-off hardware detection circuit, a DSP control module, an inverter drive circuit, an inverse bridge and an asynchronous motor; wherein, one end of the pantograph type current collector is connected with a trolley network, and the other end thereof is connected with an input end of the bow-off hardware detection circuit; an output end of the bow-off hardware detection circuit is connected with an input end of the DSP control module, and an output end of the DSP control module is connected with the inverter drive circuit and the inverse bridge which are also connected with the asynchronous motor. The invention combines the bow-off hardware detection circuit and the DSP control module, so as to realize smooth transition of an electroless spanning mode of a traction system, thus improving the traction efficiency, avoiding the current impact caused by restoring the network, having the characteristics of short spanning time, reliable performance and wide application scope, and being suitable for the working condition of domestic trolley power supply traction locomotives.

Description

technical field [0001] The invention belongs to the field of overhead line power supply locomotives, in particular to an inverter control system for overhead line type power supply locomotives. Background technique [0002] In the field of wire-powered locomotives, due to the limitations of the power supply conditions of the power grid and the partition power supply mode of long-distance lines, the pantograph (front-end collector) will inevitably face short-term disconnection or short-term power loss through non-electric partitions , often causes the DC voltage of the busbar to be exhausted and causes the DC undervoltage of the inverter, so that the traction system enters the undervoltage protection state; The dynamic current, and the necessary variables must be initialized to restart the traction system, resulting in a significant reduction in traction efficiency. In order to overcome the above problems, the inverter can usually be used to dynamically detect the DC bus vol...

AI Technical Summary

Problems solved by technology

In fact, the actual fluctuation range of the power supply network of industrial and mining enterprises in my country is often very large. In particular, some old mines have long power supply lines, serious aging, and poor track return flow, resulting in low voltage at the end of the power supply. In severe cases, the voltage drop at the end exceeds 50% of the rated power supply voltage, so that the entry value and maintenance value of no-power crossover will be very low, so the requirements for the control power supply of the traction system are quite strict, and when the power supply of the grid is restored, due to the existence of the inherent DC capacitance of the inverter, it is bound to cause a large The current impact, which affects the smooth transition of the system to the non-electric zone

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