A Novel Method for Single and Simultaneous Fault Location in Distribution Networks

Majidi, Mehrdad; Etezadi-Amoli, M.; Fadali, M. Sami

doi:10.1109/tpwrs.2014.2375816

Cited by 98 publications

(46 citation statements)

References 36 publications

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“…Equations 11-13 express first estimations of load demand for all load types except constant power loads. First, the total power injected to grid (S inj ) is computed using Equation 11. Then, the demand of all constant power loads will be subtracted from S inj , because the power consumption for this type of load is known.…”

Section: First Estimation Of Loads Demandmentioning

confidence: 99%

Accuracy improvement of impedance-based fault locating method in distribution systems with DGs considering loss of laterals and load variations

Dadary

Afrakhte

2017

Int Trans Electr Energ Syst

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Summary Fast and accurate fault location methods will accelerate power system restoration process and then cause improvement on availability and reliability indices. Presenting a modified scheme in order to improve accuracy of impedance‐based fault location method in electric power distribution systems (EPDS) equipped with distributed generation (DG) units is the main goal of this paper. To achieve this goal, an iterative algorithm is introduced to compensate load variations. Also, a method is presented based on forward/backward sweep load flow to consider loss in all laterals of EPDS. Then, fault location will be determined by using a comprehensive method that extracts a fifth‐order algebraic equation for each type of fault. This method will be modified to consider the presence of DGs in EPDS. In this paper, all the specific characteristics of real distribution systems such as unbalanced nature of network and loads, different types of loads, presence of multi‐phase laterals, and capacitive effects of distribution lines are taken into account. The proposed scheme uses only 1 measurement unit at the main substation and 1 measurement unit at the DG bus. In this paper, modified IEEE 34 node test system is simulated by using PSCAD/EMTDC software, and it is used as a test system to evaluate the performance of the proposed method. Different scenarios such as the effect of fault distance, fault type, different fault resistances, and measurement unit errors are evaluated. The results indicate usefulness and precision of the proposed scheme.

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Section: First Estimation Of Loads Demandmentioning

confidence: 99%

Accuracy improvement of impedance-based fault locating method in distribution systems with DGs considering loss of laterals and load variations

Dadary

Afrakhte

2017

Int Trans Electr Energ Syst

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“…Unlike the conventional impedance based methods, the relationships between the changes of the system impedance (caused by different faults) and the changes of the voltages at different system nodes are used. The voltage variations (voltage sag/increase) are monitored [19][20][21][22][23][24][25][26] to locate faults. The system pre-fault and post-fault steady state voltages at different system nodes are recorded to calculate the voltage sags of different fault scenarios and a map of the voltage variations for different faults can be derived by off-line simulations.…”

Section: Introductionmentioning

confidence: 99%

High Frequency Impedance Based Fault Location in Distribution System With DGs

Jia

Ren

Thomas

et al. 2018

IEEE Trans. Smart Grid

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk ABSTRACT Distributed Generations (DGs) in the distribution systems are connected into the buses using power electronic converters. During fault, it is challenging to provide a constant impedance model for DGs in the system frequency due to the variable converter control strategies. System frequency impedance measurement based fault locations can be influenced by the converters' fault behavior. This paper addresses this problem by proposing a wide-area high frequency impedance comparison based fault location technique. The high frequency impedance model of DG is provided. Based on the constant DG impedance model in high frequency range, the faulted line sections can be distinguished by comparing the measured impedance differences without requiring the exact distribution system parameters. Simulation results show that the proposed wide-area transient measurements based fault location method can provide accurate faulted sections in the distribution systems with DGs regardless of the load and DG output variations, measurement noise, unbalanced loads and islanding operations.

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“…The authors in [6] discuss a method for identifying faulted segments on multi-phase distribution primaries using sequence component modeling and standard three-phase short-circuit solvers. Machine-learning is utilized in [7] to pinpoint fault location by using smart meters along the primary feeders. The author of [8] presents a fault location method for radial distribution networks.…”

Section: Introductionmentioning

confidence: 99%

Fault Identification and Location for Distribution Network with Distributed Generations

Fan

Liao

2018

International Journal of Emerging Electric Power Systems

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Right click to open a feedback form in a new tab to let us know how this document benefits you. Abstract:Power distribution networks with distributed generations may experience faults. It is essential to promptly locate the fault for fast repair and restoration. This paper presents a novel method for identifying the faulted section and accurate location of faults that occur on power distribution grid. Appropriate matrices are set up to represent meter locations on the grid and the topology of the grid. The voltage and current measurements obtained are utilized to decide the fault sections. Then fault location is determined by solving equations that link measurements and fault locations through bus impedance matrix. The method is applicable to both single and simultaneous, multiple faults that may occur on unbalanced, meshed distribution networks with distributed generations.In this section, a method for identifying the fault section by using voltage and current measurements recorded from meters placed across the system is developed. If only voltage measurements are available, then currents Wen Fan is the corresponding author.

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A Novel Method for Single and Simultaneous Fault Location in Distribution Networks

Cited by 98 publications

References 36 publications

Accuracy improvement of impedance-based fault locating method in distribution systems with DGs considering loss of laterals and load variations

Accuracy improvement of impedance-based fault locating method in distribution systems with DGs considering loss of laterals and load variations

High Frequency Impedance Based Fault Location in Distribution System With DGs

Fault Identification and Location for Distribution Network with Distributed Generations

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