East Group Co., Ltd.

Shaohui Li

Wei Yu

Jin Zhao

A method, an apparatus and a computer device for detecting an open circuit fault are provided. The sample data of the electrical signal at the primary side of the transformer in the CLLLC resonant bidirectional DC/DC converter is performed with spectrum analysis to obtain a first frequency, and whether an open circuit fault occurs in the CLLLC resonant bidirectional DC/DC converter can be determined according to the first frequency and an actual switching frequency.

Open-circuit fault detection method and apparatus, and computer device

In the fault diagnosis method, apparatus, and computer device, the method includes acquiring line voltage values in real time according to a voltage collector connected to phase lines (S); according to the line voltage values and preset system parameters, obtaining a voltage peak balance degree and a phase angle offset of the three-phase power grid (S); and obtaining a fault diagnosis result according to the voltage peak balance degree and the phase angle offset (S). In such a way, a real-time diagnosis operation of whether a three-phase power grid is balanced can be implemented only by performing on-line calculation and analysis on line voltage values, which has simple analysis operation to reduce the system complexity; and only a voltage collector is added, and no other hardware costs are required, moreover high diagnosis reliability is obtained.

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Guangdong, China

Shaohui Li