An Accurate Synchrophasor Based Fault Location Method for Emerging Distribution Systems

Ren, Jianhua; Venkata, S.S.; Sortomme, E.

doi:10.1109/tpwrd.2013.2288006

Cited by 111 publications

(57 citation statements)

References 2 publications

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“…The proposed method consists of two steps to find the actual fault location [3]. In the first step, candidate locations are found using µPMU measured at one terminal by iterating every line segment.…”

Section: µPmu Based Fault Location Methodsmentioning

confidence: 99%

Untitled

Zhou¹,

Gao²,

Zhang³

2015

Proceedings of the 2015 International Forum on Energy, Environment Science and Materials

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Abstract. Accurate fault location is helpful to improve the stability of power distribution network. With the integration of distributed generations and electric vehicles, the traditional distribution network gradually became the active distribution network, which requires new technologies for fault location. The arise of high-precision micro phasor measurement unit, termed µPMU, satisfies the need of active distribution network. In this paper, a new method based on µPMU is proposed to locate the fault in the active distribution network. The candidate faults are located by the voltage and current information of µPMU at one terminal. To get the actual fault location, the pseudo fault locations are eliminated by phase difference of µPMUs at two terminals. The simulation results show that the location method has high position accuracy, whether in traditional distribution network or in active distribution network, less than 1%. And can satisfy different types of fault with simply installing µPMUs at the two terminals of the active distribution network.

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Section: µPmu Based Fault Location Methodsmentioning

confidence: 99%

Untitled

Zhou¹,

Gao²,

Zhang³

2015

Proceedings of the 2015 International Forum on Energy, Environment Science and Materials

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“…Along the years, several fault detection and location methods have been proposed for distribution networks. The majority of them are based on impedance measurements (e.g., [2]), travelling waves (e.g., [3]) or phasor measurements (e.g., [4]). However, to the best of the authors' knowledge, the existing literature has marginally discussed the possibility of merging the detection and location functionalities.…”

Section: Introductionmentioning

confidence: 99%

Fault Detection and Faulted Line Identification in Active Distribution Networks Using Synchrophasors-Based Real-Time State Estimation

Pignati

Zanni

Romano

et al. 2017

IEEE Trans. Power Delivery

226

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Abstract-We intend to prove that PMU-based state estimation processes for active distribution networks exhibit unique time determinism and refresh rate that make them suitable to satisfy the time-critical requirements of protections as well as the accuracy requirements dictated by faulted line identification. In this respect, we propose a real-time fault detection and faulted line identification functionality obtained by computing parallel synchrophasor-based state estimators. Each state estimator is characterized by a different and augmented topology in order to include a floating fault bus. The selection of the state estimator providing the correct solution is done by a metric that computes the sum of the weighted measurement residuals. The proposed process scheme is validated by means of a real-time simulation platform in which an existing active distribution network is simulated together with a PMU-based monitoring system. The proposed process is shown to be suitable for active and passive networks, with solid-earthed and unearthed neutral, for low and high impedance faults of any kind (symmetric and asymmetric) occurring at different locations.

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“…In [3,4], the apparent impedance, which is determined as the ratio of voltage to current in the selected line based on the fault type, was calculated for every line in the network. In addition to measuring voltage and current at a substation, the network electrical parameters were used to examine the apparent impedance at all lines in the network.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, fault resistance affects the performance of these methods. In [4], by the increase of phasor measurement units (PMUs), the problem of multiple fault location estimation was solved.…”

Section: Introductionmentioning

confidence: 99%

Fault location in distribution systems with DG based on similarity of fault impedance

Moravej¹,

Hajhossani²,

Pazoki³

2017

Turk J Elec Eng & Comp Sci

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This paper presents a new method for locating a fault in distribution systems using the similarity of fault impedance. A four-step approach is proposed to locate the fault in the networks. First, pre-and during-fault voltages from smart feeders along the primary feeders are measured. Second, three-phase impedance to calculate fault current corresponding to voltage deviation from each smart meter is achieved. Third, a relation between fault current and fault impedance for each type of fault is extracted. Finally, based on the similarity of the estimated fault impedance for each bus, an error index is calculated. Moreover, an auxiliary process is utilized to analyze the estimated fault impedance. The proposed method uses both smart meters and phasor measurement units to obtain voltage sag. Distributed generation and loads are modeled as constant impedances and then they are considered in the three-phase impedance matrix. The suggested approach is evaluated in the IEEE 34-bus test distribution network, which is simulated in the PSCAD/EMTDC environment. The obtained numerical results confirm the acceptable accuracy of the proposed methodology for all types of faults with various fault resistances.

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An Accurate Synchrophasor Based Fault Location Method for Emerging Distribution Systems

Cited by 111 publications

References 2 publications

Untitled

Untitled

Fault Detection and Faulted Line Identification in Active Distribution Networks Using Synchrophasors-Based Real-Time State Estimation

Fault location in distribution systems with DG based on similarity of fault impedance

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