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The paper presents an example of modeling high-voltage line with classical columns and pillars compacted with the same lines and testing out the model in the programming tool DIgSILENT with actual measured data for Single Line to Ground Fault with the use of ARs. The parameters of the classical and compacted 400 kV transmission line are entered into the model in the example of 400 kV line Tuzla 4...
This paper presents an approach to fault location in HVDC transmission lines. A superimposed signal calculated from voltages and currents sampled in the same terminal is processed by a morphological filter in order to highlight the wavefronts and allow the fault location. The morphological filter was adopted due to its simplicity and low computational cost. A suitable combination of superimposed signal,...
A realistic simulation of fault arc is required in proper design of transmission system equipment such as fault locators. Usually, in the travelling wave-based fault location algorithms, the effect of the arc of the fault is neglected. The influence of fault arc characteristics on the accuracy of fault locator which is based on the travelling wave theorem, is studied in this paper. Proposed algorithm...
When a fault occurs on a transmission line, fault-generated high-frequency signals contains a lot of information about fault. This paper proposes a fault location scheme for transmission lines based on spectrum characteristic of high-frequency components, the difference of adjacent two natural frequencies in one ends of transmission line is used to compute fault distance. This method need not identify...
Coal mine distribution power system is a one-terminal power network which located at the end side of power network. When single phase to ground fault occurs, fault current is too weak to locate the fault position. In order to solve this problem, a new algorithm is presented, which uses the difference of wave velocity between ground mode component and aerial mode component of traveling wave that arrives...
The paper presents problems concern transmission systems identification during non-simultaneous faults in electrical power system. Investigation is connected with the parameter identification of reduced equivalent systems representing complex electrical power systems. The method-parameter identification criterion was chosen, for equivalent systems determined to modification. It was assumed at the...
In this work a new model for analyzing single phase transmission lines with frequency dependent electrical parameters is presented. The proposed model is based on the method of characteristics of partial differential equations. For the case of overhead transmission lines this new model requires the approximation of only one electrical parameter by rational functions: the transient resistance.
A critical infrastructure (CI) consists of those physical and information technology facilities, networks, services and assets which, if disrupted or destroyed, have a serious impact on the health, safety, security or economic well-being of citizens or the effective functioning of governments. Nowadays, the operation controls of these infrastructures have been computerized and have gradually become...
A transmission line differential relaying scheme based on Discrete Wavelet Transform (DWT) is presented in this paper. Comparison of the transient energy in the current signals at both ends of the transmission line is introduced. The transient energy in the current signals is extracted using DWT. A sliding data window with a length equivalent to half cycle of the fundamental power frequency is used...
In this paper, a fault location algorithm using travelling waves and a cross correlation method is proposed for HVDC cable lines. The arriving instants of the first fault-induced transient backward travelling wave and its subsequent reflected wave can be detected by using a cross correlation method. The fault distance is estimated by using the time difference between the two instants of incident waves...
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