双通道开关磁阻发电机建模及故障仿真研究

Modeling and fault simulation of dual-channel switched reluctance generator

针对双通道开关磁阻电机两个通道之间存在强烈电磁耦合从而导致系统缺相运行时相电流严重畸变的问题,设计了一种单通道容错控制方法。首先利用基于场路耦合有限元法的仿真软件JMAG构建了一个12/8双通道开关磁阻发电机的仿真模型;然后在理论分析总结得出系统的大部分故障将导致系统缺相运行的基础上,基于仿真模型仿真分析了系统正常运行状态和缺相运行状态时的发电性能;最后针对系统缺相运行状态提出了单通道容错控制方案,并通过仿真对该方案进行了验证。研究结果表明,该容错控制方案能够有效改善缺相故障下系统的输出性能,为该类发电系统的故障诊断和容错控制提供了依据。

Aiming at the problem that the mutual electromagnetic coupling between each channel in the dual-channel switched reluctance ma- chine caused phase current distortion when phase failure occurred, an one-channel fault-tolerant method was designed. Firstly, a simulation model of 12/8 dual-channel switched reluctance generator was established with JMAG simulation software based on field-circuit coupled finite element method. Secondly, most failures were analyzed theoretically. And it turned out that most failures lead to phasing failure. Then on the basis of the model, generating performance of the normal condition and the phase fault condition was sinmlated and analyzed by using JMAG software. At last, aiming at the phase fauh condition, the one-channel fault-tolerance method was presented and simulated. The results indi- cate that the one-channel fault-tolerance method can improve the generating performance effectively. The modeling and fault-tolerant method also has certain reference value to fault diagnosis and fault-tolerant research of the kind of generating system.