Test station for detecting thyristor valve group

The present invention relates to a test station, which can be used as an equivalent current source and voltage source for positive and negative parallel thyristor valve groups TCR and TSC, an asynchronous motor soft starter and other devices, and used for testing same. The test station comprises a rectification link; a bipolar DC voltage source; a bipolar capacitor; a voltage oscillation circuit which comprises a second set of capacitors and a first reactor which are connected in series, and a first thyristor valve group connected to an equipotential bus and the output end of the rectification link; a current loop which is connected between the equipotential bus and a grounding bus, and leads to a thyristor reactor loop. An operational switch is arranged in the loop, and the thyristor reactor loop is connected between the first output end of the second set of capacitors in the voltage oscillation circuit and the grounding bus through the operational switch, or is connected to the first thyristor valve group in the voltage oscillation loop in parallel, so as to ensure that the test station detects an asymmetric thyristor valve group and a symmetrical thyristor valve group.