基于混杂系统模型和事件辨识的电力电子电路故障诊断

FAULT DIAGNOSIS FOR POWER ELECTRONIC CIRCUITS BASED ON HYBRID SYSTEM THEORYAND EVENT IDENTIFICATION

该文建立了一个基于混杂系统理论的电力电子电路数学模型;然后将电路的各个运行状态抽象为离散事件;并在该模型的基础上提出了基于混杂系统事件辨识的故障诊断方法和它的实现步骤。该方法具有实现简单、诊断率高、通用性较强的优点。文章最后通过 Buck 电路的故障诊断实验验证了该方法的可行性和有效性。

A mathematic model is established for power electronic circuits on the basis of hybrid system theory. Then, the circuit state that is formed by on-off state of the circuit’s all power electronic switches is expressed to a discrete event. Based on the hybrid model and event identification, a fault diagnosis method and its process for power electronic circuits are put forward. This method possesses good characteristic such as simple realization, high diagnosis correctness and universal application. Its feasibility and validity is verified by fault diagnosis experiments of Buck circuit.