Abstract:

An improved cumulative sum (ICUSUM)-based technique for fault detection has been proposed in this paper. A fault detection algorithm has been presented using only one filtered signal to detect a fault, unlike the two complementary signals used earlier in the cumulative sum-based method, in order to compute detector index. The fault detection techniques so far suggested in the literature are sensitive to uncertainties and change in system condition, yielding inaccurate output. The relative performances of different algorithms have been tested in the presence of noise, harmonics, spike, and high-resistance fault. The test results obtained using the present method reveal better performance over other detection algorithms. The proposed detector is robust against any distortion in the current samples. A system has been considered for simulation under the MATLAB®/Simulink™ environment.

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