Parameter estimation, selective auto‐reclosing and fault location for three‐terminal mixed transmission lines using synchronised data

Naidu, O. D.; George, Neena; Yalla, Preetham

doi:10.1049/iet-gtd.2020.0889

Cited by 8 publications

(4 citation statements)

References 37 publications

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“…This may not work for hybrid three-terminal lines. To mitigate the need for several data sets, a technique to determine the parameters for TTHTLs using pre and during-fault signals is presented in [48,49]. The method in [48] uses positive sequence quantities to obtain the fault location along with the line parameters using the trust region optimization algorithm.…”

Section: B Literature Reviewmentioning

confidence: 99%

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Setting Free Fault Location for Three-Terminal Hybrid Transmission Lines Connected With Conventional and Renewable Resources

Kukkala¹,

Naidu²

2023

IEEE Access

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Three-terminal hybrid transmission lines (TTHTLs) are attractive from both environmental and commercial view. Hybrid transmission lines are growing due to urbanization, connecting an industrial load and renewable integration. A TTHTL comprises sections of both overhead lines and underground/subsea cables or overhead lines with different X/R ratios. Faulted section identification (FSI) is key for defining the adaptive/selective auto-reclosing scheme and estimation of the fault location for TTHTLs. In this paper, FSI and fault location algorithms are proposed without using the parameters of any line section. Novelty of the methodology lies in a two-stage approach to the problem. In the first stage, series impedance parameters of all the sections are calculated using closed loop formulae. These parameters are then utilized in identifying the faulted section. In the second stage, the above calculated line section parameters and faulted section are used to estimate complete line parameters including shunt capacitance and subsequently the fault location. The advantage of the proposed method is that it does not require an initial guess of the line section parameters, is non-iterative in the first stage, and provides correct fault section identification for TTHTLs. These features make it suitable for designing the selective auto-reclosing protection scheme for the TTHTLs within traditional protection relaying hardware. More importantly, the series impedance parameters calculated in the first stage constitute good initialization values for the non-linear problem of estimating the complete line parameters. This results in better convergence of the algorithm and accurate parameter estimation. The developed solution is verified using the PSCAD/EMTDC simulations for TTHTLs connected with conventional and different inverter-based renewable resources. The performance of the proposed solution is compared with commercially available solutions, and it is found to be accurate. This solution is amenable for implementation in line differential protection relays without additional infrastructural changes.INDEX TERMS Adaptive auto-reclosing protection scheme, inverter-based renewable resources, faulted section identification, fault location, parameter estimation, three-terminal hybrid transmission lines NOMENCLATURE A. VARIABLES

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Section: B Literature Reviewmentioning

confidence: 99%

“…The success of the method depends on the proper initial guess. The method in [49] requires positive and negative sequence quantities, it may not work when IBRs are connected in the network. These techniques need proper initial guess.…”

Section: B Literature Reviewmentioning

confidence: 99%

Setting Free Fault Location for Three-Terminal Hybrid Transmission Lines Connected With Conventional and Renewable Resources

Kukkala¹,

Naidu²

2023

IEEE Access

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“…However, this shift from traditional radial systems to meshed networks presents novel challenges for fault location [1]. The single-phase-to-ground location in neutral isolated distribution networks has been a topic of research for a long time and there are numerous available methods [2,3], which can be categorized into four types as follows: steady-state signal-based (SSBM) [4,5], transient signal-based (TSBM) [6,7], signal or disturbance injectionbased (SIBM) [8], and artificial intelligence-based methods (AIBM) [9].…”

Section: Introductionmentioning

confidence: 99%

A PLC communication characteristics‐based fault location method in medium voltage meshed distribution networks

Bin,

Min‐gang,

Junliang

et al. 2024

IET Generation Trans & Dist

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A power line carrier (PLC) communication characteristics‐based method is proposed for single‐phase‐to‐ground fault location in neutral isolated medium voltage meshed distribution networks in this paper. The carrier signals with a time‐varying frequency and constant amplitude are processed by a set of PLC transmitters and receivers, whose placement is optimized by regarding the power network as an undirected graph. Two signal encoding and decoding algorithms for the PLC terminals are proposed to avoid using expensive timing systems between the terminals. The fault location technique is implemented by comparing the cosine similarity of amplitude attenuation and phase offset between the fault and a feature library. The node corresponding to the maximum cosine similarity of the characteristics between the present fault and the library is selected as the location of the current fault. Only one set of low‐cost PLC communication terminals and the widely available power lines are needed in the fault location system, making this approach highly practical. Numerical simulations using MATLAB/Simulink have been performed to verify the technique's feasibility. The results show that the method can accurately locate faults in neutral isolated medium voltage meshed distribution networks. Besides, the presented approach achieves a high level of accuracy in estimating transition resistance values.

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“…Differential components of bus voltages are calculated to identify fault section using the PI line model transfer matrix and, then, fault location is calculated. A selective auto reclosing and fault location method for mixed three-terminal lines using synchronized data from all three terminals have been proposed in [14]. To estimate fault section and calculate fault location, four sets of four nonlinear functions are formed from equivalent circuits of the pre and during fault system.…”

Section: Introductionmentioning

confidence: 99%

A novel protection and fault location combined algorithm for mixed/hybrid lines

Aminirad

Shahrtash

2022

IET Generation Trans & Dist

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This paper presents a novel protection and fault location combined algorithm for mixed overhead transmission lines (OHLs) and underground cables (UGCs). The method is based on applying the Morphological Gradient (MG) to the modal component of synchronized measured currents at both ends of the mixed line to detect the transient components generated by the fault. The proposed method utilizes the sign of superimposed components for discriminating internal and external faults and the difference between the times related to these transient components to detect fault location. The method has been evaluated through various simulations, whereas it has a very low computational burden, it is suitable for online applications. Results have shown high performance of the method against different fault inception angles (FIA), fault resistances, fault types, fault locations, combinations of OHL‐UGC, and even current transformer saturation, noise presence, long cable section, and different sheath‐ground connections.

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Parameter estimation, selective auto‐reclosing and fault location for three‐terminal mixed transmission lines using synchronised data

Cited by 8 publications

References 37 publications

Setting Free Fault Location for Three-Terminal Hybrid Transmission Lines Connected With Conventional and Renewable Resources

Setting Free Fault Location for Three-Terminal Hybrid Transmission Lines Connected With Conventional and Renewable Resources

A PLC communication characteristics‐based fault location method in medium voltage meshed distribution networks

A novel protection and fault location combined algorithm for mixed/hybrid lines

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