Ground fault currents in unit generator-transformer at various NGR and transformer configurations

Sultan, Ahmad Rizal; Mustafa, Mohd Wazir; Saini, Makmur

doi:10.1109/isiea.2012.6496615

Cited by 6 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…With the growing penetration of RES, many studies have been conducted to evaluate TOV during an SLG fault. The influence of transformer configuration on TOV was analyzed by [13][14][15][16]; these studies verified the effectiveness for the primary winding grounding of the interconnection transformer. According to the voltage regulation allowance of the American National Standards Institute, the voltage on the healthy phases could rise by 1.82 pu during an SLG fault [13].…”

Section: Introductionmentioning

confidence: 84%

“…Furthermore, in [14], the impacts of the sequence reactance ratio of interconnection transformer on TOV were evaluated, presenting the range of effective grounding. In [15], the influences of transformer configurations and NGR adjustments on TOV were investigated based on MATLAB/Simulink. In [16], various conditions, such as transformer grounding, grid connection, feeder capacitor, and load, were further considered based on EMTDC/PSCAD.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Efficient and Comprehensive Evaluation Method of Temporary Overvoltage in Distribution Systems with Inverter-Based Distributed Generations

et al. 2021

View full text Add to dashboard Cite

In general, a temporary overvoltage (TOV) on the healthy phases occurs because of the neutral-shift phenomenon during a single line-to-ground (SLG) fault. The TOV can destroy the insulation of electric devices and cause damage to other equipment and customer loads in just a few cycles. In practice, the TOV can be affected by numerous factors: the sequence reactance ratio of the interconnection transformer, the ratio of load to DG, and the distance to the fault. More importantly, inverter-based distributed generations (DGs) have different influences on the TOV from traditional synchronous-machine-based DGs. In this sense, this work performed an efficient and comprehensive investigation on the effect of these various parameter types and their extensive variations, based on steady-state analysis with sequence equivalent circuits and three-dimensional representations. The proposed methodology can facilitate judging the impact of multi-parameter conditions on the TOV readily and comparing the fault characteristics of synchronous-machine-based and inverter-based DGs. Finally, the results can be used for future studies on TOV mitigation techniques.

show abstract

Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Efficient and Comprehensive Evaluation Method of Temporary Overvoltage in Distribution Systems with Inverter-Based Distributed Generations

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Metode ini dapat dibagi menjadi dua kategori umum: solid Grounding dan impedance grounding. Impedance grounding dapat dibagi lagi menjadi beberapa sub kategori : reactance grounding, resistance grounding, dan ground fault neutralizer grounding tegangan dari fasafasa yang tidak terganggu bila terjadi gangguan kawat tanah (Sultan, Mustafa, & Saini, 2012). Adapun sistem pentanahan titik netral ditunjukkan pada gambar 1.…”

Section: A Metode Pentanahan Netralunclassified

“…Sistem Pentanahan melalui Resistor dimana ada penambahan pada sisi sekunder trafo dengan resistor. Apabila sistem terjadi arus gangguan tanah besarnya tegangan sistem dan kapasitas sistem dimana semakin besar arus nya maka gangguan tanahnya lebih kecil karena melalui impedansi(Sultan et al, 2012). Adapun sistem pentanahan titik netral ditunjukkan pada gambar 2. kedalaman beberapa puluh sentimeter didalam tanah.…”

unclassified

Pengaruh Sistem Pentanahan Terhadap Arus Gangguan Tanah Pada Sistem Distribusi 20 Kv

Kalosa

setiawidayat²,

Mukhsim³

2020

CRC

View full text Add to dashboard Cite

The process of electricity distribution often have been affected , including disruption to the ground. This study aims to analyse the impact of the current Ground system disorder to land at kV 20 distribution systems. Ground system that is solid analysis system , resistor , reactor. In a comparison with looked at and charts using etap 12.6. With the Ground solid System on a bus 2 with distance 300 m of the disorder of plants having 30.066. kA. For the current disorder 2 the phase to the ground having the disruption of 30.903 kA by the distance where closer the disorder bigger the disorder land so does the contrary

show abstract

“…The charging current problem doesn't exist for application of low resistance value method because it allows to hundreds of amperes to passes through it and return to the power system equipment's. This range of faulted current is dangerous due to the damage of the high value of this current and there is necessity to clearing the earthing fault in very short time (cycles) [16]. Also there is difficulty to allocate the earthing fault location.…”

Section: Charging Currentmentioning

confidence: 99%

COMPARISON OF EARTHING TECHNIQUES FOR SINGLE LINE TO GROUND FAULT IN 11 kV DISTRIBUTION SYSTEM USING SIMULINK

Abdullah¹,

Ali²,

Thamir³

2019

JEASD

View full text Add to dashboard Cite

In this paper, a new smart earthing method was proposed to reduce the current magnitude of single line to ground fault and thus reduce the damage caused by this fault. Traditional methods of earthing system were studied and compared with the proposed new method using simulation in the MATLAB program to show the superiority of the new method and its economic benefit. The power system characteristics depending on the selection of earthing methods such as charging current magnitude, overvoltage, insulation level, mechanical and thermal damage and fault clearing time are discussed. In this smart technique, a bank of earthing resistors is used according to the characteristics of the earthing fault (fault resistance value), which leads to the passage of a low electric current, but it is detectable regardless of the faults characteristics. Fuzzy Logic Controller technique is used to solve control problem.

show abstract

Ground fault currents in unit generator-transformer at various NGR and transformer configurations

Cited by 6 publications

References 9 publications

Efficient and Comprehensive Evaluation Method of Temporary Overvoltage in Distribution Systems with Inverter-Based Distributed Generations

Efficient and Comprehensive Evaluation Method of Temporary Overvoltage in Distribution Systems with Inverter-Based Distributed Generations

Pengaruh Sistem Pentanahan Terhadap Arus Gangguan Tanah Pada Sistem Distribusi 20 Kv

COMPARISON OF EARTHING TECHNIQUES FOR SINGLE LINE TO GROUND FAULT IN 11 kV DISTRIBUTION SYSTEM USING SIMULINK

Contact Info

Product

Resources

About