Power supply method and system of vehicle-mounted contact net detecting accessory on high voltage side

Abstract

The embodiment of the invention provides a power supply method and system of a vehicle-mounted contact net detecting accessory on a high voltage side, and relates to the technical field of train detection power supply. According to the method, a permanent magnet type wind driven generator is arranged in a high voltage side of a pantograph of the train, the generator generates wind power during theoperation of the train, and then the electric energy is converted by an electric energy control converter and finally transmitted to electric equipment and standby batteries; and furthermore, a vehicle speed threshold value is set, when the operating speed of the train is higher than the vehicle speed threshold value, the output voltage of the electric energy control converter is adjusted down, and at the same time the output voltage remains constant, so that the output voltage can be matched with the nominal voltage of rear-stage electric equipment; and when the operating speed of the trainis below the vehicle speed threshold value, the electric energy control converter no longer outputs voltage, and the standby batteries supply power to the rear-stage electric equipment. Through adopting the method, electric energy can be generated without using source side current, and the impact on the electric energy control converter can be avoided; and meanwhile, whether the train operates rapidly or slowly, the nominal voltage supplied to the electric equipment can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of train detection and power supply, in particular to a power supply method and system in which the vehicle-mounted catenary detection is attached to the high-voltage side. Background technique [0002] At present, the way of taking power from the high-voltage side of the train is to use a current transformer to take power. The current transformer is installed on the pantograph pole of the train. Because the voltage of the railway catenary is a power frequency alternating current, the electric energy can be obtained by means of electromagnetic induction. , through the power control converter to convert the induced power into the power that the equipment can use. [0003] There are defects in the above power supply method: [0004] During the operation of the train, the main circuit breaker of the train must be disconnected every time the train pantograph passes through the phase splitter. The electromagneti...

AI Technical Summary

Problems solved by technology

[0005] Electric energy is obtained by means of current transformers, and the output power of small-sized transformers is often insufficient, which affects the normal operation of electrical equipment;

[0006] When using a high-power current transformer, the output power can be satisfied, but the volume of the high-power transformer is relatively large, which is inconvenient to use and install

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