Two-terminal power transmission and distribution line fault locating method for use in factory, involves receiving measurements of three phase currents from two terminals, and receiving measurements of three phase voltages

摘要

The method involves receiving measurements of three phase currents from two terminals. Measurements of three phase voltages are received from one of the terminals. Transmission parameters of a line are received. A symmetrical current and voltage component is determined corresponding to the phase currents and the phase voltages. A fault loop voltage is determined from one of the two terminals based on the corresponding symmetrical voltage components and on a fault type. A distance to a fault seen from one of the terminals is determined based on the fault loop voltage. Independent claims are also included for the following: (1) a device for locating a fault in a two-terminal power transmission and distribution line (2) a computer program has a set of instructions to perform a two-terminal power transmission and distribution line fault locating method.