Patent ID: 8339153

Claim:
Fault current test equipment for a direct current thyristor valve, comprising: a high voltage low current circuit comprising, a high voltage circuit in series with a thyristor sample (Vt); a capacitor (C) in series with the high voltage circuit and the thyristor sample (Vt); an inductor (L) in series with the high voltage circuit, the capacitor (C), and the thyristor sample (Vt), wherein one terminal of the capacitor (C) links the inductor (L) and the high voltage circuit, and another terminal links the thyristor sample (Vt) and the high voltage circuit; an isolating valve (V 21 ) in parallel with an isolating valve (V 22 ), wherein the isolating valve (V 21 ) and the isolating valve (V 22 ) are in series between the inductor (L) and the thyristor sample (Vt); a low voltage high current circuit, comprising, an isolating valve (V 41 ); a pulse rectifier bridge ( 6 ), wherein the isolating valve (V 41 ), the pulse rectifier bridge ( 6 ), and the thyristor sample (Vt) are coupled in series to form a circuit; a fault current circuit comprising a resonant circuit, wherein the high voltage low current circuit, the low voltage high current circuit and the fault current circuit are all connected with the thyristor sample (Vt) respectively; and a switch between the thyristor sample (Vt) and the fault current circuit.