Integrated Fault Zone Discrimination and Fault Location Algorithm for Series FACTS-based Transmission Lines

Citation:
Zeinhom, A. N., D. K. Ibrahim, and M. Gilany, "Integrated Fault Zone Discrimination and Fault Location Algorithm for Series FACTS-based Transmission Lines", 2018 Saudi Arabia Smart Grid (SASG), Jeddah, Saudi Arabia, 11-13 Dec. 2018.

Date Presented:

11-13 Dec. 2018

Abstract:

Discrimination and location of faults in Flexible Alternating Current Transmission Systems (FACTS) have several challenges in power systems. This is because of the errors in the measured impedance due to FACTS control actions. The presence of series FACTS in a transmission line complicates both the fault location and discrimination between faults behind and in front of the FACTS device. This paper proposes an integrated solution for both fault zone discrimination (either in front of or behind the FACTS device) and fault location for series FACTS-compensated transmission lines. Online calculations are carried out to estimate the percentage of compensation. After fault inception, a wavelet-based algorithm is used to decide whether the fault is in front of the FACTS device or behind it. Then, a conventional distance protection algorithm is used to estimate the fault zone. After that, synchronized data signals from both ends are used to locate the exact location offline. The algorithm is tested using a real data for a 380 kV, 400 km series-compensated line in Saudi Arabia using MATLAB/SIMULINK. Different types of faults are applied to validate the effectiveness of the algorithm. Metal-Oxide Varistor (MOV) nonlinearity is also considered. Simulation results show the effectiveness of the algorithm.

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