基于ANSYS Maxwell的干式空芯电抗器匝间短路故障瞬态特性的仿真分析

Simulation Analysis on Transient Characteristics of Inter-turn Short Circuit Fault of Dry-type Air-core Reactor Based on ANSYS Maxwell

该文对干式空芯电抗器匝间短路故障的瞬态特性进行了研究,并提出了一种早期预警方法。分析了干式空芯电抗器从正常工作状态到匝间短路故障发生的动态物理过程;基于ANSYS Maxwell软件平台,建立了电抗器匝间短路故障的瞬态场路耦合计算模型;仿真分析了电抗器匝间短路故障的瞬态特性,并通过搭建实验平台进行了实验验证。研究表明,在电抗器匝间短路故障早期,由于短路环的瞬间形成会引起电抗器短路位置处磁场发生突变,进而使安装在电抗器包封外表面的磁场探测线圈感应电压产生显著异常变化,据此,在电抗器匝间短路故障早期即可进行预警。

In this paper,the transient characteristics of the short-circuit fault of dry-type air-core reactor are studied,and an early-warning method is proposed.The dynamic physical process of dry air core reactor from normal working condition to turn-to-turn short circuit fault condition is analyzed.Based on the ANSYS Maxwell software platform,a transient field circuit coupling calculation model for reactor turn-to-turn short-circuit is established.The transient characteristics of the short-circuit faults of the reactor are analyzed by simulation,and the experimental verification is carried out by setting up the experimental platform.The research shows that in the early stage of the reactor short-circuit fault,the instantaneous formation of the short-circuit ring will cause a sudden change in the magnetic field at the short-circuit position of the reactor,and the induced voltage of the magnetic field detecting coil mounted on the outer surface of the reactor will be significantly abnormally changed.According to this,an early warning can be made in the early stage of the reactor short-circuit fault.