Protection method, system, device and readable storage medium for braking resistor

Abstract

The invention discloses a method for protecting a brake resistor. The method comprises the following steps: obtaining the voltage of the brake resistor through a voltage sensor, and obtaining the current of the brake resistor through a current sensor; calculating the resistance value of the brake resistor by using the voltage and the current; comparing the size of the resistance value with the size of a preset value, and carrying out corresponding protective measures on the brake resistor, wherein the preset resistance value is a corresponding resistance value of the brake resistor at a presettemperature. According to the method, the resistance value of the brake resistor is obtained, the temperature of the brake resistor is indirectly obtained, and then the brake resistor is protected. Due to the fact that the method is free of a temperature sensor in the prior art, the adopted device does not need to operate near the brake resistor, and a high temperature environment can be avoided;and therefore, the service life of the device is prolonged, and safe operation of a haulage motor is guaranteed. Correspondingly, the invention also discloses a system and a device for protecting thebrake resistor and a readable storage medium.

Description

technical field [0001] The invention relates to the field of locomotive electric braking circuit design, in particular to a method, system, device and readable storage medium for protecting a braking resistor. Background technique [0002] Multi-current locomotives with DC mode are generally equipped with braking resistors, which are used to consume the energy generated by the electric braking of the locomotive, which can effectively reduce the impact on the brake shoes of the locomotive during the long downhill process of the locomotive. wear and avoid brake failure caused by excessive brake shoe temperature during the process. [0003] In the high-power long-time electric braking mode, the braking resistor consumes the electric energy generated by the electric braking of the locomotive in the form of heat. When the locomotive goes downhill on a long slope, because the braking power of the locomotive is usually relatively large and the braking time is long, the braking res...

AI Technical Summary

Problems solved by technology

When the locomotive goes downhill on a long slope, because the braking power of the locomotive is usually relatively large and the braking time is long, the braking resistor works in a high temperature stage for a long time, and the overtemperature alarm device of the braking resistor therefore works in a high temperature environment for a long time , resulting in failure of the over-temperature alarm related device of the braking resistor after running for a period of time

At this time, the brake resistor loses the over-temperature protection, and when the brake resistor of the locomotive is over-temperature, the over-temperature fault cannot be reported, resulting in the burnout of the brake resistor of the locomotive, which brings risks to the safety of locomotive operation

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