Journal ArticleDOI
Fault Surge Versus Switching Surge A Study of Transient Overvoltages Caused by Line-to-Ground Faults
E. W. Kimbark,Alvin C. Legate +1 more
TLDR
In this paper, it was shown that the overvoltages caused by energization or reenergization of lines can be made so low that the limiting factor determining how much the line insulation may be reduced might become the over voltage produced by single line-to-ground faults.Abstract:
When the improvements in extra-high- oltage power circuit breakers now being studied are realized in practice, over- voltages caused by energization or reenergization of lines can be made so low that the limiting factor determining how much the line insulation may be reduced might become the overvoltage produced by single line-to-ground faults. On lines insulated for levels below twice the normal line-to-ground crest voltage, such faults could develop into double line-to-ground faults, which would be particularly objectionable if single-pole switching were to be employed.read more
Citations
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Journal ArticleDOI
Transient Overvoltages Caused by Monopolar Ground Fault on Bipolar DC Line: Theory and Simulation
TL;DR: A short circuit from one pole to ground on a bipolar overhead dc line can produce an overvoltage factor as high as 2.2 per unit on the unfaulted pole, which may cause flashover of line insulation, thus converting a monopolar fault into a bipolar one.
Journal ArticleDOI
Power system fault detection and state estimation using Kalman filter with hypothesis testing
TL;DR: In this paper, an algorithm for detecting power system faults and estimating the pre and post-fault steady state values of the voltages and currents is described, based on the Kalman filter and hypothesis testing.
Journal ArticleDOI
A digital protection technique for parallel transmission lines using a single relay at each end
TL;DR: A novel digital relaying technique for parallel transmission lines is presented and the idea of the protection algorithm is based on the comparison of the average current of corresponding phases.
Journal ArticleDOI
Amplitude comparator based algorithm for directional comparison protection of transmission lines
TL;DR: In this paper, a 1st order digital low-pass filter is used to filter the voltage deviation signal, and an amplitude comparator method was used to determine the direction to a fault.
Journal ArticleDOI
Switching Surges: Part IV-Control and Reduction on AC Transmission Lines
TL;DR: Papers published on switching surges between 1970 and 1978 are listed in a recent bibliography by the Working Group on Switching Surges.
References
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Journal ArticleDOI
Switching of Extra-High-Voltage Circuits II-Surge Reduction with Circuit-Breaker Resistors
Journal ArticleDOI
Basic Considerations of Magnitude Reduction of Switching Surges Due to Line Energization
TL;DR: In this paper, the criteria which provide a basis for a rational study of transient phenomena arising from switching operations are illustrated in statistical terms: in particular, the possible ways in which reduction of switching surges can be examined assuming suitable hypotheses are shown.