Fault Position Identification for Series Compensated Lines with SSSC Based on Improved Wavelet Packet Entropy
In this paper, the correction factor is introduced to improve the wavelet packet entropy, which is used to analyze the transient fault current of the series compensated line with Static Synchronous Series Compensator (SSSC). The results show that the wavelet packet entropy when the fault point is before SSSC is much larger than that when the fault point is after SSSC. According to this characteristic, the scheme of identifying fault position for series compensated lines with SSSC is put forward. Cooperated this scheme with the distance protection, the measured impedance of distance protection is adjusted adaptively so that the over-reaching and under-reaching of the distance protection due to SSSC can be eliminated effectively.
Q. Liu et al., "Fault Position Identification for Series Compensated Lines with SSSC Based on Improved Wavelet Packet Entropy", Advanced Materials Research, Vols. 383-390, pp. 5200-5205, 2012