Fault diagnosis method and device of energy feedback power supply device and storage medium

[0058] The exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. Rather, they are only examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0059] First, explain the terms involved in this application:

[0060] Pulse Width Modulation (Pulse Width Modulation, referred to as PWM) rectifier: The main technology used for medium capacity unit power factor, generally requires the use of self-shutdown devices.

[0061] Urban rail transit has become the first choice to solve the increasingly serious urban congestion problem due to its advantages