Three-level converter power unit double pulse test method
A technology of power unit and test method, which is applied in the direction of measuring electrical variables, instruments, measuring electricity, etc., can solve the problems of complicated test methods, burned circuits, and poor pertinence, and achieve the effect of simple and effective test methods
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[0019] The present invention will be further described below in conjunction with the drawings. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.
[0020] Such as figure 1 Shown is a circuit diagram of an existing three-level converter power unit. The three-level converter power unit includes an upper-arm DC source DC1, a lower-arm DC source DC2, a first supporting capacitor C1, and a second supporting capacitor C2. , First discharge resistor R1, second discharge resistor R2, clamp resistor R3, first absorption capacitor Cs1, second absorption capacitor Cs2, first discharge contactor S1, second discharge contactor S2, first freewheeling diode D1 , The second freewheeling diode D2, the third freewheeling diode D3, the fourth freewheeling diode D4, the first clamping diode D5, the second clamping diode D6, the first IGBTT1, the second IGBTT2, ...
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