Locating Natural Frequency Faults in HVDC Transmission Systems Based on the Rotation-Invariant Technology Signal Parameter Estimation Algorithm and the Total Least Squares Method

Table 7

Comparison of TLS-ESPRIT algorithm and CWT algorithm.

Actual point of failure (km)	TLS-ESPRIT (Hz)	Calculated ranging point (km)	CWT (Hz)	Calculated ranging point (km)	Increased accuracy (%)
20	3737	20.17	3711	20.21	+2.00
50	1506	50.04	1508	49.73	+6.20
75	1011	74.55	1016	74.19	+4.80
100	752	100.23	755	99.33	+4.40
125	604	124.79	609	123.15	+13.12
150	502	150.15	509	147.35	+16.67