High-Resistance Grounded Power-System Equivalent Circuit Damage at the Line–Ground Fault Location—Part I

Paul, Dev

doi:10.1109/tia.2014.2346702

Cited by 9 publications

(7 citation statements)

References 16 publications

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“…Hence, the symmetrical components of the transmission line impedance Z AB and the apparent reactive impedance of the FACTS device Z F ACT S are defined according to equation (20) as follows:…”

Section: Phase To Ground Fault Calculations In the Presence Of Facts mentioning

confidence: 99%

“…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]. Further studies addressed the effect of distributed generators on arcing faults, [15], current zero estimation technique to control the arcing time of circuit breakers, [16], bus-bar protection, [17], impedance fault protection in high voltage transmission lines, [18], groundfault feeder detection, [19], and an equivalent circuit of a high resistance grounded power supply transformer in the case of ground fault, [20]. With the growing stress on the aging existing grids, power systems face an unprecedented range of technical, economical, environmental and security challenges and constraints.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Phase To Ground Fault Calculations In the Presence Of Facts mentioning

confidence: 99%

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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“…The choice of a particular safety factor is discussed in [9] and it is generally selected to be close to 1.25.…”

Section: A Ground Resistor Sizing and Pickup Settingsmentioning

confidence: 99%

“…Consequently, the authors believe that MSHA's present pickup setting of 40% of the NGR limit is appropriate. However, recent research of 4160 V systems has indicated that a pickup setting of 20% of the NGR limit for (4160-V systems) may be more appropriate for detecting arcing ground faults [9]. Therefore, this may be an area for future research for 15-kV class mine power systems.…”

Section: Ground Fault Pickup Settingmentioning

confidence: 99%

Best Practices for Implementing High-Resistance Grounding in Mine Power Systems

Sottile

Tripathi

Novak

2015

IEEE Trans. on Ind. Applicat.

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Proper implementation of high-resistance grounding of mine power systems reduces personnel hazards by limiting ground fault current and permits selective detection and clearing of faults. As described in IEEE Std. 142, high resistance grounding employs a neutral resistor of high ohmic value, with the value of the resistor selected to limit the neutral ground resistor current to a magnitude equal to, or slightly greater than, the total capacitance charging current. Research has shown that the zero-sequence resistance of high-voltage mine distribution systems can be considerably larger than the magnitude of the system capacitive reactance, thereby violating the definition of high-resistance grounding. This paper outlines procedures for proper sizing of the neutral grounding resistor considering system capacitance. The paper begins with a discussion of problems associated with distributed capacitance in high-voltage, high-resistance-grounded mine power systems. Subsequently, procedures for determining system capacitance, sizing the neutral grounding resistor, and establishing relay pickup settings are given.These procedures are straightforward to apply and require no computer modeling for implementation. Numerical examples applied to a high-voltage longwall utilization system and an underground mine distribution system are provided.Index Terms-Charging current, ground fault, mine power system, resistance grounding, system capacitance I. 0093-9994 (c)

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“…In medium voltage (MV) networks, HRG systems can limit the fault current to <10 A. These systems can also operate permanently during SLG faults [7,8]. Some other advantages of HRG systems are removing transient over-voltages and minimising electric shocks.…”

Section: Introductionmentioning

confidence: 99%