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| Transmission Line Fault Location Method Based on Compressed Sensing Estimation of Traveling Wave Natural Frequencies |
| Yu Huanan1, Ma Congcong1, Wang He2 |
1. School of Information Engineering Northeast Dianli University Jilin 132012 China;
2. School of Electrical Engineering Northeast Dianli University Jilin 132012 China |
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Abstract In this paper, a fault location method for transmission lines based on compressed sensing is proposed, it can precisely estimate the natural frequencies of multiple traveling waves with high accuracy of fault location. According to the frequency domain characteristics of the fault traveling wave signal, a new over-complete dictionary is designed to make the traveling wave signal sparse. When fault location is performing, use wavelet modulus maxima method to determine the boundary frequency of fault signals first, then use FIR filter to filter out low frequency interference and transform into the frequency domain to ensure it is in the over-complete dictionary sparse representation. On this basis, a modified OMP algorithm based on Dice coefficients (DOMP algorithm) is used to reconstruct a frequency domain signal of traveling waves and accurately identifies the natural frequency values of the traveling wave signal. Finally combine the reflection angle and the wave velocity to achieve accurate fault location. The simulation results show that the method of dictionary design combined with DOMP algorithm have high location accuracy and reliability.
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Received: 23 January 2017
Published: 22 December 2017
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2017, Vol. 32 
