Research on diagnosis method of Interturn short Circuit Fault of dry reactor

Dry-type hollow reactor is widely used in power system, its operating environment is bad, the annual sun and rain also accelerate the aging of its insulation, it is easy to cause the dry reactor inter-turn insulation damage and burn down. At present, the main methods of live detection of dry reactor are infrared thermal imaging technology. DC resistance and insulation resistance are required in blackout test. These tests can not detect the inter-turn insulation of dry reactor. In this paper, the magnetic field and impedance characteristics of the interturn insulation damage of dry reactor are studied. The magnetic field changes and impedance characteristics of dry reactor are simulated by using ANSYS analysis software when the interturn magnetic field occurs in the end and middle of the reactor, respectively. A fault simulation platform for dry reactor is established, and a new method for interturn insulation detection is proposed.