Bidirectional controllable arc generator

The invention provides a bidirectional controllable arc generator. The bidirectional controllable arc generator comprises at least one part of a first lead, a first electrode, a second electrode, a second lead and a switch component which can serially connected to form an electric circuit and is characterized in that the first lead is connected with the first electrode and can be connected with anexternal power distribution network physical simulation system through the switch component, and the second lead is connected with the second electrode and is grounded through a grounding unit; the first electrode can translate along the length direction of the first electrode, the second electrode can rotationally move, and accordingly the relative position and/or distance between the first electrode and the second electrode can change according to needs. The arc generator can simulate various types of arc grounding faults and is especially suitable for being used to solve the difficulty of100kV system arc fault sim