High-power braking energy consumption device and control method thereof

Abstract

The invention discloses a high-power braking energy consumption device and a control method thereof. The device comprises an isolating switch module, a chopper module, a reactor module and a braking resistance module, wherein the isolating switch module is connected with the reactor module, the chopper module is connected with the reactor module, the braking resistance module is connected with the chopper module, the isolating switch module detects the voltage of a direct-current bus, the braking resistance module comprises a bipolar linkage blade switch and an absorbing resistor, the double-system conversion of the high-power braking energy consumption device is realized through the bipolar linkage blade switch according to the voltage of the direct-current bus, and the braking resistance module implements the absorption and discharge of braking energy. The reactor module comprises a filter reactor which is used for carrying out filtering on the voltage of a power grid. The chopper module is used for carrying out chopping control on the braking energy. According to the invention, the double-system conversion of the high-power braking energy consumption device is realized, and in the double-system, the device can absorb higher power fed back by currently involved domestic railway vehicles, thereby ensuring the reliable operation of power grids and vehicles.

Description

technical field [0001] The invention relates to a high-power power electronic device and a control method thereof, in particular to a high-power braking energy consumption device and a control method thereof applied in the field of rail transit. Background technique [0002] In recent years, with the rapid development of my country's urban rail transit construction, subway and light rail have become the main mode of urban rail transit. The vehicle will feed back energy to the grid during electric braking. When this part of energy cannot be completely absorbed by other vehicles or electrical equipment, the excess regenerative braking energy will cause the grid voltage to rise, and excessive grid voltage will endanger The safety of power station equipment and vehicle on-board equipment. Therefore, it is necessary to consume the excess energy fed back to the grid during electric braking to maintain the grid voltage stability. [0003] The traditional on-board braking system a...

AI Technical Summary

Problems solved by technology

The device needs to cooperate with the actions of four isolating switches at the same time for each conversion system, which makes the conversion complicated, the control logic complex, easy to misuse, and increases the complexity of the structural design.

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