A Novel Algorithm for Locating Faults on Transposed/Untransposed Transmission Lines Without Utilizing Line Parameters

Apostolopoulos, Christos; Korres, George N.

doi:10.1109/tpwrd.2010.2053223

Cited by 78 publications

(34 citation statements)

References 17 publications

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“…In this part, the performance of this method is compared with that of the conventional transposed [4] and untransposed [1], [5], [45]- [47] fault location methods. To apply the conventional transposed method to untransposed lines, the mutual couplings between sequence circuits are ignored.…”

Section: A Proposed Two-terminal Fault Location Methodsmentioning

confidence: 99%

“…In fact, existing fault location methods for untransposed lines have been developed based on the same simplifications that have been made in [5]. Recent works have focused on other aspects of the problem such as synchronization of measured phasors [46] or line parameters errors [47], and/or have extended the conventional method to deal with double-circuit and series-compensated untransposed lines. In this respect, a comparison between the fault location results obtained by the proposed method and approaches of these research works is performed.…”

Section: A Proposed Two-terminal Fault Location Methodsmentioning

confidence: 99%

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Locating Faults on Untransposed, Meshed Transmission Networks Using a Limited Number of Synchrophasor Measurements

Azizi

Sanaye‐Pasand

Paolone

2016

IEEE Trans. Power Syst.

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Abstract-The method of symmetrical components is not effective for fault location in the case of untransposed lines, due to potential couplings between the sequence circuits. This paper proposes a non-iterative algorithm in the phase-coordinates for wide-area fault location on untransposed transmission networks. In doing so, first, an improved two-terminal method is suggested to accurately locate faults on untransposed lines. Next, an algorithm is proposed to infer voltage and current phasors at the faulted line ends without direct measurements, by taking advantage of the data provided by phasor measurement units (PMUs). Accordingly, the adverse effect of close instrument transformers transients on the estimation accuracy is minimized. Being highly nonlinear in terms of fault distance and impedance, the fault equations are derived and made linear in this paper by defining six suitable auxiliary variables. The resulting system of equations is solved using the least-squares method to obtain three-phase voltages and currents at the faulted line ends. A main feature of the proposed algorithm is that it only requires a limited number of current and voltage synchrophasors. An additional advantage of the proposed algorithm is that the faulted line is not required to be known a-priori. The proposed algorithm is validated using extensive simulation studies on the New England 39-bus test system, accounting for different fault locations, types and resistances.

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Section: A Proposed Two-terminal Fault Location Methodsmentioning

confidence: 99%

Section: A Proposed Two-terminal Fault Location Methodsmentioning

confidence: 99%

Locating Faults on Untransposed, Meshed Transmission Networks Using a Limited Number of Synchrophasor Measurements

Azizi

Sanaye‐Pasand

Paolone

2016

IEEE Trans. Power Syst.

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“…A travelling-wave-based approach, presented in [23], is capable of calculating the location of fault on combined transmission lines which performs the wavelet transform on voltage measurements of one terminal. A two stage method has been proposed in [24] which uses a small window of pre-fault data and utilises the short line model. The method proposed in [25] is capable of locating faults on double circuit transmission lines which uses current measurements from both terminals; however, this method uses the short line model.…”

Section: Introductionmentioning

confidence: 99%

Parameter‐free fault location for transmission lines based on optimisation

Davoudi

Sadeh

Kamyab

2015

IET Generation, Transmission & Distribution

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An accurate algorithm for locating faults on two-terminal transmission lines is presented in this study. The presented method does not require values of line parameters to locate the fault; therefore variation of line parameter values does not affect its accuracy. The method utilises synchronous post-fault measurements of currents and voltages in both terminals and is based on the distributed time-domain representation of transmission lines. Unlike conventional methods, fault location is converted to an optimisation problem. Then, this problem is solved by genetic algorithm to find the accurate location of fault. Furthermore, modifying the problem to be solved by the Newton optimisation method is discussed in this study. Simulation results performed by ATP/EMTP verify high accuracy of the presented method, and reveal that it is not significantly affected by fault resistance, fault type, fault inception angle and source impedance. Moreover, effect of measurement errors and synchronisation errors on the accuracy of presented method have been analysed which verify the efficiency of the algorithm in these conditions.

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“…The utilization of redundant network equations has also been under research for fault location using single-end and multiend measurements [18]- [21]. Reference [18] utilizes redundant network equations to estimate the fault point by a least error squares method.…”

mentioning

confidence: 99%

“…In [20], an iterative double-end method for fault location is proposed by considering measurement errors. The authors of [21] employ iterative methods to solve for fault distance and a synchronization angle using unsynchronized double-end measurements. However, in the case of unsynchronized measurements, the problem of estimating the synchronization angle may lead to nonunique solutions [18].…”

mentioning

confidence: 99%

A Wide-Area Scheme for Power System Fault Location Incorporating Bad Data Detection

Dobakhshari

Ranjbar

2015

IEEE Trans. Power Delivery

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Phasor measurements have found many applications in modern power systems. Wide-area fault location utilizing the bus-impedance matrix and available measurements is a recent achievement in the context of smart transmission grid. This paper aims at developing a wide-area fault-location scheme capable of detecting and identifying erroneous measurements. As a result, while multiple available measurements contribute to fault location in order to increase accuracy, the reliability of fault location is not compromised as the proposed scheme detects, identifies, and removes erroneous measurements. The transfer impedances between the fault location and the phasor measurements, which can be remote from the faulted line, are utilized to formulate fault location as a nonlinear fitting problem. Having estimated the fault location and total fault current, we employ statistical hypotheses testing to detect, identify, and remove bad data. In the case of unsynchronized measurements, the fitting problem is modified to include only the magnitude of measurements. The proposed method considers the distributed parameter model of the transmission lines and, therefore, the obtained results are also valid for long transmission lines. Electromagnetic transient simulations for the WSCC 9-bus and a 41-bus subnetwork of the IEEE 118-bus test system reveal successful fault location by synchronized as well as unsynchronized measurements.

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A Novel Algorithm for Locating Faults on Transposed/Untransposed Transmission Lines Without Utilizing Line Parameters

Cited by 78 publications

References 17 publications

Locating Faults on Untransposed, Meshed Transmission Networks Using a Limited Number of Synchrophasor Measurements

Locating Faults on Untransposed, Meshed Transmission Networks Using a Limited Number of Synchrophasor Measurements

Parameter‐free fault location for transmission lines based on optimisation

A Wide-Area Scheme for Power System Fault Location Incorporating Bad Data Detection

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