Fault location algorithms for power transmission lines based on Monte-Carlo method

This paper presents a new approach for calculation of fault location on high voltage transmission lines. The proposed fault location algorithm utilizes statistical information about the equivalent impedances of the system at the unmonitored end of the transmission tine. Knowledge about the distribution laws of these values or their numerical characteristics which are more accessible for practical use, results in more accurate fault location for lines with grounded neutral, especially in case of distant short circuits through the large transient resistance. The proposed algorithm is based on modeling of the faulted line and the method of Monte-Carlo. The algorithm calculates not only the expected value of the distance to the fault, but also another important additional characteristic for the fault location, namely, the length of the line segment, where short circuit may have occurred