Electric reactor leakage reactance protection device and method

The invention discloses an electric reactor leakage reactance protection device. The device comprises an electric reactor body support, leakage reactance detection modules are distributed on the periphery of the electric reactor body support, the leakage reactance detection modules are powered by a power module through cables, the leakage reactance detection modules are installed on the upper portion of the electric reactor body support, and the positions with strong magnetic fields of the electric reactor body support, and a protection module, an execution module and a power supply module are arranged in the protection screen cabinet of the electric reactor body. A magnetic flux acquisition module installed around the reactor body support converts the intensity of a leakage magnetic flux signal into a voltage signal, compares the voltage signal with a given voltage value, converts the voltage signal into a switching value signal and provides the switching value signal to a protection device, and the protecti