Abstract
This paper presents a traveling wave-based grounded fault localization method for compensated distribution grids. It includes two parts: fault section identification algorithm and fault distance estimation algorithm for the radial and loop distribution systems with the consideration of capacitor bank switching effect. The algorithms require only the current traveling wave signals and use the discrete wavelet transform (DWT) to detect the arriving times of the fault generated traveling wave signals. The proposed methodology is evaluated through MATLAB Simulation of grounded fault in 10 kV grounded loop and radial distribution systems. Simulation result show that this proposed algorithm can identify faulted section correctly and estimate fault distance accurately even though the fault signal is mixed with switching effect. The proposed method can reduce confusion burden by selecting accurate faulted line and complexity burden by considering the effect of capacitor bank switching.
Published Version
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