Y capacitor simulation test circuit, method, system and device

The invention provides a Y capacitor simulation test circuit, method, system and device, and relates to the technical field of circuits. The Y capacitor simulation test circuit comprises an interlocking contactor, a capacitor switching unit, a capacitance value detection unit and a controller, and the capacitor switching unit comprises a plurality of switching switches arranged in parallel and a plurality of Y capacitors respectively connected with the switching switches in series; the interlocking contactor is connected with the capacitor switching unit, the capacitor switching unit is further connected with the capacitance detection unit, the capacitance detection unit is further connected with the controller, the controller is further connected with a plurality of switching switches and the interlocking contactor of the capacitor switching unit, and the controller is further used for receiving a capacitor switching instruction. According to the invention, the accuracy of the Y capacitance value required by