Method for determining leakage impedance of transformer, and power converter

Abstract

The embodiment of the invention relates to a method for determining the leakage impedance of a transformer (30) and a power converter (10). The power converter (10) is configured to acquire values of a first voltage and a first current in an AC output of the power converter (10), a second current value between an output filter (20) connected to the AC output and a primary side of a transformer (30) connected to the output filter, and a second voltage value on a secondary side of the transformer (30), wherein said values are determined when the secondary side of the transformer (30) is disconnected from the AC network (50), and a leakage impedance of the transformer (30) is determined on the basis of the values of the first voltage, the first current, the second current and the second voltage and at least one predetermined impedance parameter value of the output filter (20).

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