Patent ID: 11899050
Assignee: WOBBEN PROPERTIES GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  Y | IPC G  H

Claim 12:
13. The method as claimed in claim 5, comprising:
repeating multiplying each measurement point of the at least one series of measurements by the test function and summing the plurality of products while varying the test angle in the first test loop, wherein:
the test angle is varied within a first angle range, and
the test angle is varied with a first angle increment; and

repeating multiplying each measurement point of the at least one series of measurements by the test function and summing the plurality of products while varying the test angle in the second test loop, wherein:
the test angle is varied within a second angle range, and
the second angle range is selected depending on the phase angle of the low-frequency oscillation detected in the first test loop to detect the phase angle of the low-frequency oscillation with a higher accuracy than in the first loop.