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Voltage sag has become one of the most power quality problems of customer complaints. This paper researches on how to use fault current limiter (FCL) to relieve the voltage sag of sensitive load node. Assuming that three phase short circuit fault occur on every bus in power grid respectively, the voltage sag matrix is determined, buses in vulnerability area of sensitive load node are found. Sensitive...
A novel fault identification and location scheme designed for small distribution systems as found on aircraft is presented. Under normal operating conditions, the aircraft power supply contains only a low level of triplen harmonics, resulting from slight mismatches in the distribution of single phase nonlinear loads across the three phases. When cable faults occur, the change of conduction modes of...
With the move towards “More Electric Aircraft” there is a greater need to quickly identify and locate electrical faults within the distribution system. The work presented in this paper forms an initial study into the use of power system impedance measurement for identifying faults types within the power cables. The method is passive - i.e. does not require the injection of any test signals - and can...
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