TY - GEN
T1 - Application of instantaneous frequency estimation of sweep signal for localizing faults in a power cable
AU - Lee, Chun Ku
AU - Kwak, Ki Seok
AU - Yoon, Tae Sung
AU - Park, Jin Bae
PY - 2011/12/1
Y1 - 2011/12/1
N2 - In this paper, we introduce a reflectometry which is used as localizing faults in an underground power cable. To increase the resolution and SNR, time-frequency domain reflectometry (TFDR) adopts the Gaussian enveloped linear chirp signal and Wigner-Ville distribution (WVD) based time-frequency cross-correlation (TFCC) method. However, the nonlinearity of WVD and the computational burden of 2D cross-correlation hinder the TFDR from being a field testing implementation. In order to reduce the nonlinearity and computational burden, we derive the second order time-varying AR model of Gaussian enveloped linear chirp signal and estimate the instantaneous frequency (IF) by using the weighted robust least squares (WRLS) estimator. Based on the estimated IF, the fault distance can be calculated. Computer simulations are conducted to verify the proposed method. The simulation result shows that the proposed method reduces the computational burden of time-frequency cross-correlation and the nonlinearity of WVD.
AB - In this paper, we introduce a reflectometry which is used as localizing faults in an underground power cable. To increase the resolution and SNR, time-frequency domain reflectometry (TFDR) adopts the Gaussian enveloped linear chirp signal and Wigner-Ville distribution (WVD) based time-frequency cross-correlation (TFCC) method. However, the nonlinearity of WVD and the computational burden of 2D cross-correlation hinder the TFDR from being a field testing implementation. In order to reduce the nonlinearity and computational burden, we derive the second order time-varying AR model of Gaussian enveloped linear chirp signal and estimate the instantaneous frequency (IF) by using the weighted robust least squares (WRLS) estimator. Based on the estimated IF, the fault distance can be calculated. Computer simulations are conducted to verify the proposed method. The simulation result shows that the proposed method reduces the computational burden of time-frequency cross-correlation and the nonlinearity of WVD.
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M3 - Conference contribution
AN - SCOPUS:84863031271
SN - 9781457708350
T3 - International Conference on Control, Automation and Systems
SP - 1915
EP - 1918
BT - ICCAS 2011 - 2011 11th International Conference on Control, Automation and Systems
T2 - 2011 11th International Conference on Control, Automation and Systems, ICCAS 2011
Y2 - 26 October 2011 through 29 October 2011
ER -