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Electrical tracking is one of the main reasons for the deterioration of insulation surface. According to the problem of the surface electrical tracking erosion of insulation used in the high-voltage mining cables, the Ethylene Propylene Rubber samples with different electrical tracking development stage were selected in the paper. The relationship between the surface electrical tracking erosion degree...
Unintentional series and/or parallel resonances, due to the tuned passive filter and the line inductance, may result in severe harmonic distortion in the industrial power system. This paper presents a hybrid active filter to suppress harmonic resonance and to reduce harmonic distortion. The proposed hybrid filter is operated as variable harmonic conductance according to the voltage total harmonic...
Low-dropout voltage regulator (LDO) is widely used in up-to-date electrical systems but with severe EMC problems. Its susceptibility prediction has become one of the major concerns both of IC suppliers before fabrication to avoid redesign cost and customers before real application to reduce incompatible. This paper presents a LDO susceptibility modeling study including IEC standard modeling flow and...
In this paper, the susceptibility of a low dropout voltage regulator (LDO) in direct RF power injection (DPI) is analyzed by measurements and simulation. The measurements highlight the offset in the output induced by the conducted RF disturbances and various failure modes. Discrete components used in the injection path and test board are modeled based on impedance measurements. DPI simulations using...
Pilot protection schemes use communication channels to send information from the local relay terminal to the remote relay terminal, thereby allowing high-speed tripping for faults occurring within 100% of the protected line. This document is intended as a tool for protection engineers to assist in determining when pilot protection should be installed for transmission line protection, in addition to...
Harmonic voltage amplification, due to unintentional series or parallel resonance of power factor correction capacitors, is a significant issue in the industrial power system. Conventional active filters intended to compensate the harmonic current producing by nonlinear loads would not be an effective solution in this scenario, and the harmonic voltage may still be significant. This paper proposes...
With development of sophisticated renewable energy technologies, paradigm shift of both power generation and power distribution is happening and happening fast. Compared with conventional power generation, renewable energy sources are installed to the utility grid in a distributed fashion, which may result in various power quality issues, such as unbalance voltage and harmonic voltage resonance. An...
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