| 摘要 |
<p>A method and system for determining estimate values for phase-to- earth admittances of a three-phase electric line of an electric power system, the system being arranged to monitor voltage and current values of the sys- tern, determine a sum of phase-to-earth admittances of the electric line (F1, F2, F3) after a phase-to-earth fault has occurred in the electric power system outside the electric line, determine an unsymmetrical part and a symmetrical part of the sum of phase-to-earth admittances of the electric line (F1, F2, F3), and determine phase-to-earth admittances of the three-phase electric line (F1, F2, F3) on the basis of the symmetrical part and unsymmetrical part of the sum of phase admittances of the electric line.</p> |
