FIELD: electrical engineering.
SUBSTANCE: proposed method comprises determining voltage vectors on every end of the system power line controlled section, said voltage vectors being determined in at least two time intervals. It comprises also defining their vector product and comparing the sign of obtained vector product with that obtained in previous time interval. If comparison reveals sign change, absolute sum of voltage vectors and their absolute difference are calculated to be compared between themselves. Note here that is difference of voltage vectors exceeds or equals their sum, asynchronous conditions are taken to exit.
EFFECT: higher reliability of detection.
3 dwg
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