The invention relates to the technical field of fault diagnosis, in particular to a charging
pile main power circuit fault diagnosis
system construction method based on a digital-physical
hybrid platform, and the method comprises the steps: constructing a fault
database based on historical fault data; diversified fault features are injected into a charging
pile main circuit discrete model in the core
processing module through a random extraction strategy, and a fault reaching the standard is dynamically forbidden in combination with a closed-loop
verification mechanism, so that a diagnosis model continuously adapts to an unknown fault type. Fault diagnosis models in a core
processing module and an auxiliary
processing module in an upper computer are respectively optimized by verifying diagnosis results, fault
library dynamic injection is combined with double-level diagnosis
verification, the limitation of center AI static modeling in the prior art is broken through, and a digital-physical
hybrid verification closed loop is constructed, so that the fault diagnosis accuracy is improved. The two times of verification and optimization of the charging
pile fault diagnosis model in the hardware-in-the-loop are realized, and the accuracy and the real-time performance of the fault diagnosis of the charging pile main power circuit under the complex working condition are comprehensively improved.