Application of travelling-wave methods to the calculation of transient-fault currents and voltages in power-system networks

Bickford, J.P.; Abdel-Rahman, M.H.

doi:10.1049/ip-c.1980.0026

Cited by 9 publications

(5 citation statements)

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“…The transmission line has three-phase impedance Z abc /mile (formed by self and mutual impedance among phases). [2,3] That can be presented in the form: 3 For a threephase analysis this line would yield a bus impedance/admittance. The bus admittance matrix will take the form:…”

Section: Model (Iflm)mentioning

confidence: 99%

Development and Determination of Voltage-Fault-Location and Line-Fault-Location (Length of Line) on Long Transmission-Line (200 Mile = 320 Km) (Iflm).

Braide¹

2014

IJRET

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Fault location and fault-voltage problems have been presented as a major challenge in electrical power system analysis, most of these methods uses voltage and currents measurements at either one ends or both ends of a transmission line. This work presents a faultlocation/fault-voltage problems. An improved fault location model (IFLM) are developed to search for fault location in a long transformation line say (200 mile), thereby determining a set of values for a set of unknown system state variables, based on certain criterion making use of the measurements mode from the system under consideration.

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Section: Model (Iflm)mentioning

confidence: 99%

Development and Determination of Voltage-Fault-Location and Line-Fault-Location (Length of Line) on Long Transmission-Line (200 Mile = 320 Km) (Iflm).

Braide¹

2014

IJRET

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“…1 are given by: (1) where and represent the series impedance and shunt admittance per unit length, respectively,…”

Section: A Steady-state Modelmentioning

confidence: 99%

“…Among these, the following techniques can be cited: traveling wave methods (lattice diagram and Bergeron) [1], Electromagnetic Transients Program (EMTP) [2], and Laplace or Fourier transforms [3], [4]. In those cases where frequency dependence of line parameters can be ignored, numerical integration of the state-space equations provided by a simplified lumped-parameter model has been also proposed [5].…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Techniques for State-Space Transient Analysis of Transmission Lines

Macías

Gómez-Expósito

Soler

2005

IEEE Trans. Power Delivery

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This paper reviews and compares several methods to analytically obtain the transient response of transmission lines in the time domain, in those cases where frequency independent parameters can be assumed. The distributed-parameter line is modeled by the cascaded connection of a number of lumped-parameter circuits, each one representing a fraction of the line length, leading to a linear time-invariant (LTI) circuit.The associated state-space equations are formulated, allowing explicit expressions for the state variables to be written in the time domain. The solution is then obtained by means of three different approaches, all of them requiring that the natural frequencies be previously computed, namely: eigenvector-based procedure, Vandermonde matrix method, and Lagrange interpolation formula. Numerical integration by the trapezoidal rule is also considered for comparison.Two kinds of test results are presented. First, accuracy of the results provided by the LTI lumped-parameter model are compared with those obtained using the Electromagnetic Transients Program. Second, a comparison is performed in terms of the computational cost involved in each method. Two cases of practical interest are assessed, namely solving from scratch the state equations and updating the solution for a new set of initial conditions.

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“…The equations that determine the reflection and deflection phenomena in the transmission lines can be summarized as: [5]]] The characteristic (or surge) impedance of the transmission system Z 0 is given by:…”

Section: Lightning Phenomena and Surgementioning

confidence: 99%

Analysis of the Over-Voltages Produced by Lightning Strokes in the Power Transmission System in the Southern Region of Saudi Arabia

Al-Abdulaziz¹,

Bashi²,

Althubaiti³

2006

American J. of Applied Sciences

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This study deals with the simulation of lightning strokes and their effects on power network in the southern region of Saudi Arabia. The network consists of main generating stations, substations and the power transmission lines. The transient performance of the system has been investigated using the EMTP (Electro Magnetic Transient Program). Some surges were introduced to the network as in the form of lightning strokes. The power system responses to such surges were monitored and the results were recorded for studies and more analysis. These results reflect the behavior of the network under such sever conditions, in which the weak point of the system can be discovered. Then some protection devices have been suggested to maintain the continuity of the supply and power delivery. The paper also contains analytical study of the obtained results, which helps in suggesting certain solutions to avoid excessive high over-voltages in the mentioned power network

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Application of travelling-wave methods to the calculation of transient-fault currents and voltages in power-system networks

Cited by 9 publications

References 0 publications

Development and Determination of Voltage-Fault-Location and Line-Fault-Location (Length of Line) on Long Transmission-Line (200 Mile = 320 Km) (Iflm).

Development and Determination of Voltage-Fault-Location and Line-Fault-Location (Length of Line) on Long Transmission-Line (200 Mile = 320 Km) (Iflm).

A Comparison of Techniques for State-Space Transient Analysis of Transmission Lines

Analysis of the Over-Voltages Produced by Lightning Strokes in the Power Transmission System in the Southern Region of Saudi Arabia

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