Patent ID: 9465067
Filing Date: 2016-10-11
CPC Classification: G01R,Y04S

Claim Text:
1. A method for determining a fault location in an electrical power network including multi-conductor lines, comprising the steps of: measuring at an observation point located anywhere along one of the multi-conductor lines, for each of the conductors of the multi-conductor line, respectively, a fault-originated electromagnetic transient signal; defining a set of guessed fault locations, each of the guessed fault locations has a different determined location in the electrical power network, and each of the guessed fault locations is attributed a same arbitrary fault impedance; defining a network model for the electrical power network, based on a topology of the electrical power network and electrical parameters of the multi-conductor lines, the defined network model capable of simulating electromagnetic traveling waves of the electrical power network; computing for each conductor a time inversion of the measured fault-originated electromagnetic transients signal; back-injecting in each conductor of the defined network model, corresponding to the multi-conductor line, the corresponding computed time inversion from a virtual observation point in the network model corresponding to the observation point; calculating in the network model the energy of a fault current signal for each of the guessed fault locations, and identifying the fault location as the guessed fault location providing the largest fault current signal energy.