New adaptive digital distance relaying scheme for double infeed parallel transmission line during inter-circuit faults

Makwana, Vijay H.; Bhalja, Bhavesh R.

doi:10.1049/iet-gtd.2010.0707

Cited by 34 publications

(19 citation statements)

References 18 publications

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“…A current differential protection scheme is developed in [8] using transmission line π-equivalent model and phase coordination approach. Adaptive digital distance relaying scheme has been proposed by [9], [10] to mitigate against the drawbacks associated with conventional ground distance elements in the presence of mutual coupling. It has been argued that the This research was supported by DNV GL Energy Advisory proposed digital distance relaying schemes can measure the correct magnitude of apparent impedance in presence of mutual impedance and fault resistance during an inter-circuit LL and LLG faults.…”

Section: Introductionmentioning

confidence: 99%

Analytical Approach to Study the Impacts of Mutual Coupling on Transmission Lines Protection Systems

Brahman¹,

Novosad²,

Tabrizi³

et al. 2019

2019 IEEE Texas Power and Energy Conference (TPEC)

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While there are numerous literatures that have addressed the impact of mutual coupling on the reliability and security of protection schemes and have provided possible mitigation solutions, there has not been adequate research and documentation presenting a comprehensive analytical approach to 1) estimate the magnitude of mutual coupling and 2) quantify the adverse impact of mutual coupling in real-life scenarios under several system faults across various types of protective elements. This should be considered as the first stage of any mutual coupling related study preceding the second stage in which the mitigation against mutual coupling is to be developed. The proposed methodology can be used to study the impact of mutual coupling on ground overcurrent relays, ground and phase distance as well as pilot protection schemes. As part of the proposed approach, EMT simulation is utilized to quantify the extent of sub-transient overshoot and current reversal that may have adverse impact on the performance of studied relays. A real-life case study within the ERCOT network has been used to demonstrate the proposed study approach.

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Section: Introductionmentioning

confidence: 99%

Analytical Approach to Study the Impacts of Mutual Coupling on Transmission Lines Protection Systems

Brahman¹,

Novosad²,

Tabrizi³

et al. 2019

2019 IEEE Texas Power and Energy Conference (TPEC)

View full text Add to dashboard Cite

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“…It should be pointed out that the correct selection of CCFs in MV networks operated with nonsolidly grounded neutral is not always straightforward, especially in case of non-radial network topologies (e.g., closed loop) [2,3]. CCFs occur much less frequently in HV and EHV networks and they may affect the performance of distance relaying schemes; however, there are some research papers addressed in the identification and elimination of CCFs in HV and EHV networks [4][5][6][7][8][9][10][11]. Focusing now on MV networks, an important point is that, regardless of the affected network's neutral grounding, the CCF can involve fault currents of the same order of magnitude of phase-tophase faults: an accurate evaluation is thus required, in order to assess the chance of damage to cable screens/sheaths and joints, as well as the ground potential rise (GPR) of the involved earthing system.…”

Section: Introductionmentioning

confidence: 99%

An Equivalent Circuit for the Evaluation of Cross-Country Fault Currents in Medium Voltage (MV) Distribution Networks

et al. 2018

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A Cross-Country Fault (CCF) is the simultaneous occurrence of a couple of Line-to-Ground Faults (LGFs), affecting different phases of same feeder or of two distinct ones, at different fault locations. CCFs are not uncommon in medium voltage (MV) public distribution networks operated with ungrounded or high-impedance neutral: despite the relatively small value of LGF current that is typical of such networks, CCF currents can be comparable to those that are found in Phase-To-Phase Faults, if the affected feeder(s) consists of cables. This occurs because the faulted cables' sheaths/screens provide a continuous, relatively low-impedance metallic return path to the fault currents. An accurate evaluation is in order, since the resulting current magnitudes can overheat sheaths/screens, endangering cable joints and other plastic sheaths. Such evaluation, however, requires the modeling of the whole MV network in the phase domain, simulating cable screens and their connections to the primary and secondary substation earth electrodes by suitable computer programs, such as ATP (which is the acronym for alternative transient program) or EMTP (the acronym for electromagnetic transient program), with substantial input data being involved. This paper presents a simplified yet accurate circuit model of the faulted MV network, taking into account the CCF currents' return path (cable sheaths/screens, ground conductors, and earthing resistances of secondary substations). The proposed CCF model can be implemented in a general-purpose simulation program, and it yields accurate fault currents estimates: for a 20 kV network case study, the comparison with accurate ATP simulations evidences mismatches mostly smaller than 2%, and never exceeding 5%.

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“…In literature, researchers investigated the impact of fault resistance on system performance under short-circuit such as studying; the error in fault distance estimation in the presence of ground faults, [5], distance protection performance based MHO and polygonal characteristics, [6], adaptive digital distance relaying scheme for double transmission line, [7], distance relaying scheme to compensate fault location errors, [8] and an adaptive digital relaying scheme to tackle recloser-fuse mis-coordination for Distributed Generation (DG), [9]. More studies were conducted concerning the effect of fault location in distribution power systems, [10], unbalanced three-phase distribution systems, [11], transmission power system, [12], hybrid transmission lines, [13] and radial distribution systems with DG, [14].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Ground Fault Analysis for a Practical Case of a Transmission Line Equipped with Different Series FACTS Devices

et al. 2015

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Original scientific paperDue to the rising power demand and increasing population worldwide, electrical power networks have been extensively growing and striving to satisfy the escalating loads. This necessitates the need for using Flexible AC Transmission System (FACTS) devices which have become indispensable during normal and abnormal operating conditions. This paper investigates the impact of using series FACTS devices, namely Thyristor Controlled Series Capacitor (TCSC), GTO Controlled Series Capacitor (GCSC) and Thyristor Controlled Series Reactor (TCSR), on the impedance and power flow of a practical 400 kV transmission line in the Algerian power network. It also investigates the effect of varying the fault resistance on short-circuit calculations in the case of a phase to ground fault that occurs at the end of the compensated line. Analytical formulas of the employed FACTS devices, the system model under fault and short-circuit calculations are deduced and presented in the paper. Simulations results obtained using MATLAB are demonstrated for the compensated line and without compensation. These simulations are compared to show the effect of using these devices for the studied cases.It is concluded that GCSC provides better performance in the active and reactive power flow of the line under normal operating conditions and in reducing the fault current during abnormal operating conditions when the fault resistance increases. On the other hand, TCSR shows a better performance in maintaining higher voltages under fault with the increase of fault resistance.Key words: Thyristor Controlled Series Capacitor (TCSC), GTO Controlled Series Capacitor (GCSC), Thyristor Controlled Series Reactor (TCSR), Algerian power network, Phase to ground fault, Fault resistance, Short-circuit calculations.Usporedna analiza greške uzemljenja za praktični slučaj transmisijske linije s različitim FACTS uređajima. Zbog rastuće potražnje za električnom energijom i porasta svjetske populacije elektroenergetske mreže ubrzano rastu i podnose sve veće terete. Takav razvoj situacije doveo je do korištenja fleksibilnih AC transmisijskih sustava (FACTS) koji su postali nezamjenjivi tijekom normalnih i narušenih uvjeta na mreži. U ovom se radu istražuje utjecaj korištenja FACTS uređaja, tiristorski upravljani serijski kondenzatori, GTO upravljani serijski kondenzatori i tiristorski upravljana serijska reaktancija, na impedanciju i tok snage kod 400 kV transmisijske lijene u alžirskom elektroenergetskom sustavu. Istražuje se i utjecaj promjene otpora greške pri izračunu kratkog spoja u slučaju spoja faze na zemlju koje se događa na krajevima linije. Analitičke formule korištenog FACTS uređaja, model sustava s greškom i izračun kratkog spoja su izvedeni i prikazani u radu. Simulacijski rezultati dobiveni korištenjem MATLB-a prikazani su za linije sa i bez kompenzacije. Simulacije su uspoređene kako bi se prikazao učinak korištenja različitih uređaja. Zaključeno je da GTO upravljani serijski kondenzatori ima bolja svojstva kod toka radne i jalove...

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New adaptive digital distance relaying scheme for double infeed parallel transmission line during inter-circuit faults

Cited by 34 publications

References 18 publications

Analytical Approach to Study the Impacts of Mutual Coupling on Transmission Lines Protection Systems

Analytical Approach to Study the Impacts of Mutual Coupling on Transmission Lines Protection Systems

An Equivalent Circuit for the Evaluation of Cross-Country Fault Currents in Medium Voltage (MV) Distribution Networks

A Comparative Study of Ground Fault Analysis for a Practical Case of a Transmission Line Equipped with Different Series FACTS Devices

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