Short Circuit Studies in Transmission Networks Using Improved Fault Model

Terzija, Vladimir; Dobrijevic, D.M.

doi:10.1109/pct.2007.4538581

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…A prefault load flow solution provides the information about the prefault bus voltages V(0) (Terzija and Dobrijevic, 2007). A typical bus of an n bus power system network with a balanced three phase fault, through fault impedance Z f at the k th bus is shown in Figure 2.…”

Section: Interval Short Circuit Analysismentioning

confidence: 99%

Reliable power flow and short circuit analysis of systems with uncertain data

Ray

Ralhan²

2018

IJRS

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This paper addresses the problem of uncertainties in the input parameters by specifying them as compact intervals, taking into consideration the errors in modelling and measurement of transmission line parameters and also the continuous influence of load measurement errors and fluctuations in the load demand. The power flow equations are modelled as a set of nonlinear algebraic equations which are first linearised using Taylor series expansion and the solution is obtained by the Krawczyk's method of interval arithmetic. For the short circuit analysis the prefault conditions are obtained from power flow analysis and the faulty network is then solved using Thevenin's equivalent network as seen from the fault point. The proposed method is applied to 3 bus, 14 bus and 30 bus IEEE test systems where load currents and fault currents for each relay are obtained in bounded form and thus well-defined relay coordination pairs are available.

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Section: Interval Short Circuit Analysismentioning

confidence: 99%

Reliable power flow and short circuit analysis of systems with uncertain data

Ray

Ralhan²

2018

IJRS

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“…This protection responds to the impedance value measured between the relay and the fault location [11][12][13]. As the impedance of any line is fairly constant, such protection relays work with the impedance value of the line.…”

Section: Distance Protection (Ansi 21)mentioning

confidence: 99%

Novel Auto-Reclosing Blocking Method for Combined Overhead-Cable Lines in Power Networks

et al. 2016

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This paper presents a novel auto-reclosing blocking method for combined overhead-cable lines in power distribution networks that are solidly or impedance grounded, with distribution transformers in a delta connection in their high-voltage sides. The main contribution of this new technique is that it can detect whether a ground fault has been produced at the overhead line side or at the cable line side, thus improving the performance of the auto-reclosing functionality. This localization technique is based on the measurements and analysis of the argument differences between the load currents in the active conductors of the cable and the currents in the shields at the cable end where the transformers in delta connection are installed, including a wavelet analysis. This technique has been verified through computer simulations and experimental laboratory tests.

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Typical expected values of the fault resistance in power systems

Andrade

Sorrentino

2010

2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-La)

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Short Circuit Studies in Transmission Networks Using Improved Fault Model

Cited by 3 publications

References 3 publications

Reliable power flow and short circuit analysis of systems with uncertain data

Reliable power flow and short circuit analysis of systems with uncertain data

Novel Auto-Reclosing Blocking Method for Combined Overhead-Cable Lines in Power Networks

Typical expected values of the fault resistance in power systems

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