A method for testing a power distribution system (210) of a power supply network (400) includes the steps of coupling a first electrical signal (2 01) into the power distribution system (210) to be tested, of propagating the first electrical signal (2 01) along the power distribution system (210) to be tested and of receiving a second electrical signal (202) which is a portion of the first electrical signal (201) reflected within the power distribution system (210). A signal variation parameter is measured between the first electrical signal (201) and the second electrical signal (2 02) , wherein a location of a critical conducting section (203) within the power supply network (400) is obtained from the measured signal variation parameter. A maximum load rating of the critical conducting section (2 03) is determined and a control signal for controlling the power supply network (400) such that the power transferred on the critical conducting section (203) does not exceed the maximum load rating is provided. (Fig. 6)
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