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With the development of power system and the constant attention to the security of equipment and personnel, fault diagnosis of grounding grid gets more and more attention. In this paper, a new fault diagnosis method for grounding grid based on damped least square QR-factorization algorithm is presented. Firstly, a magnetic field reconstruction method based on the magnetic field method is presented...
Pulsed eddy current (PEC) detection technology has gained attention in the research and development of the non-destructive testing (NDT). In contrast to the conventional eddy current testing method, the PEC detection technology uses pulsed excitation that is characterized by the richness of frequency. So when the inner corrosion of the low-carbon steel pipeline is detected by the PEC technology, the...
This paper establishes a unequal potential grounding grid model which is different from previous model where the grounding grid is equivalent to a electric network composed of resistors, based on the principle of uniting field and circuits while considering the resistor, self-inductance, mutual inductance and leakage current of inductor .In this model ,the corrosion diagnosis equation is setting up...
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