Lightning arrester counter and system for direct-current transmission converter valve

The invention provides a lightning arrester counter and system for a direct-current transmission converter valve. No electronic component is contained in the lightning arrester counter, only arc lightgenerated by breakdown discharge between the pair of electrode plates when the lightning arrester acts is used, and an arc signal is coupled to the fiber and transmitted. The lightning arrester counter has the advantages that the structure is light and handy, the principle is simple, no electronic component is contained, the realization is realized only through the metal structural component andthe optical fiber passive component, the possibility that the counter is subjected to electromagnetic interference can be greatly reduced, the reliability of the optical signal is improved, and the false alarm is avoided. Meanwhile, by reducing the discharge area between the electrode plates, the optical fiber connector can be connected into a limited space, the efficiency of coupling arc light tothe optical fiber can be i