Flexible direct current converter valve submodule bypass switch on-off detection device

The invention discloses a flexible direct current converter valve submodule bypass switch on-off detection device. The flexible direct current converter valve submodule opening and closing detection device comprises a bypass switch mechanical display device and a bypass switch electrical display device, the bypass switch mechanical display device comprises a metal rod and a permanent magnet, the metal rod is used for manually opening and closing a bypass switch and serving as opening and closing mechanical indication of the bypass switch, and the permanent magnet is installed on the metal rod; the bypass switch electrical display device comprises a light emitting diode, a magnetic induction switch, a power supply assembly and an assembly frame, and the magnetic induction switch is used for responding to magnetic field changes caused by movement of a permanent magnet in the bypass switch mechanical display device and changing the on-off state of the magnetic induction switch according to the magnetic field cha