Calculation of minimal short-circuit current in parallel arrangement of cables for a three phase short-circuit fault

2019 ◽  
Vol 1 (5) ◽  
pp. 126-130
Author(s):  
Andrzej KSIĄŻKIEWICZ
Keyword(s):  
Short Circuit ◽  
Short Circuit Current ◽  
Three Phase ◽  
Parallel Arrangement ◽  
Short Circuit Fault

scholarly journals ANALISIS HUBUNG SINGKAT PADA GARDU INDUK 150/20 KV (STUDI KASUS DI GARDU INDUK GANDUL, CINERE)

2020 ◽  
Vol 4 (2) ◽  
pp. 53-59
Author(s):  
Cilvia Calnela ◽  
Suyitno ◽  
Imam Arif Raharjo
Keyword(s):  
Short Circuit ◽  
Circuit Breaker ◽  
Short Circuit Current ◽  
Power Station ◽  
Three Phase ◽  
Qualitative Descriptive ◽  
The Subject ◽  
The Difference ◽  
Short Circuit Fault ◽  
Manual Calculation

This study aims to determine the difference in short circuit current with manual calculation and ETAP 12.60 Simulation  in to know the suitability of capacity circuit breaker Substasion 150/20 kV at Gandul. The used method is qualitative descriptive method. The subject that will be studied is short circuit on the substation 150/20 kV Gandul Cinere. The research was conducted by using is manual calculation and software ETAP 12.60 simulation. The results obtained is differences of the short circuit current is not significant between the manual calculation and software ETAP 12.60 simulation in three conditions include 0.572% for the conditions of short circuit fault of one phase to ground, 0.884% for the conditions of short circuit fault of phase to phase and last 0.884% for the short circuit fault of three phase. Furthermore, the result of the calculation of the short circuit current will be used as an indicator of a determinant of the suitability of the capacity circuit breaker substation 150/20 kV at Gandul , obtained that a comparison of the rating circuit breaker installed (existing) is great against the result of the election of the rating circuit breaker base on manual calculation. So it can be concluded that the circuit breaker beinstalled on the substation 150/20 KV at Gandul, has a capacity that suits your needs and still fit for use. ABSTRAK Penelitian ini bertujuan untuk mengetahui perbedaan besar arus hubung singkat antara perhitungan manual dan simulasi ETAP Power Station 12.6 serta untuk mengetahui kesesuaian kapasitas pemutus tenaga GI Gandul 150/20 kV. Metode yang digunakan adalah deskriptif kualitatif. Subjek pada penelitian ini adalah arus hubung singkat pada Gardu Induk 150/20 kV Gandul Cinere. Penelitian dilakukan menggunakan perhitungan manual dan simulasi software ETAP Power Station 12.6. Hasil penelitian diperoleh bahwa perbedaan hasil arus hubung singkat yang tidak signifikan antara perhitungan manual dan simulasi software ETAP Power Station 12.6 dalam tiga kondisi meliputi 0.572% untuk kondisi gangguan hubung singkat salah satu fasa ketanah, 0.884% untuk kondisi gangguan arus hubung singkat fasa ke fasa dan terakhir 0.884% untuk gangguan arus hubung singkat tiga fasa. Selanjutnya, hasil perhitungan arus hubung singkat tersebut akan digunakan sebagai indikator penentu kesesuaian kapasitas pemutus PMT (Circuit Breaker) GI Gandul 150/20 kV, diperoleh bahwa perbandingan rating pemutus PMT yang terpasang (existing) lebih besar terhadap hasil pemilihan rating pemutus PMT berdasarkan perhitungan manual. Sehingga dapat disimpulkan bahwa pemutus tenaga yang terpasang pada di GI Gandul 150/20 kV memiliki kapasitas yang sesuai dengan kebutuhan dan masih layak digunakan.

Analysis of Fault Recorder Data for Short-Circuit Current in a 500kV Busbar Short-Circuit Accident

2011 ◽  
Vol 383-390 ◽  
pp. 1290-1294
Author(s):  
Wei Cao ◽  
Yong Sheng Wang ◽  
Bei Liu ◽  
Wei Wang
Keyword(s):  
Short Circuit ◽  
Short Circuit Current ◽  
Frequency Component ◽  
Fault Recorder ◽  
Three Phase ◽  
Dc Component ◽  
Grid Operation ◽  
Short Circuit Fault ◽  
Operation And Management ◽  
Fundamental Frequency Component

The three-phase short-circuit fault of the 500 kV busbar of Waigaoqiao No.2 Power Plant was described, and the fault recorder data was analyzed for short-circuit current. The RMS of short-circuit current decaying fundamental frequency component, DC component and the attenuation time constant was obtained by Fourier transform, extrapolating with the exponential function. Finally, Corresponding suggestions for grid operation and management were also proposed.

Current Limiting Reactor's Reactance Value Selection Based on Short-Circuit Transient Analysis

2013 ◽  
Vol 722 ◽  
pp. 223-227
Author(s):  
Tie Ying Zhao ◽  
Yan Wen Wang
Keyword(s):  
Transient Process ◽  
Transient Analysis ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Engineering Calculation ◽  
Calculation Formula ◽  
Current Limiting ◽  
Current Change ◽  
Short Circuit Fault ◽  
A Current

Current limiting reactor can increase systems short circuit impedance so as to limit short circuit current. Current limiting reactor is directly involved in whole short circuit process when a short circuit fault occurs in a power system, which makes short-circuit current change more complex. Short circuit current level is affected by current limiting reactors parameters; a current limiting reactor with proper impedance value can maintain short-circuit current at an acceptable range. A short circuit transient process of a distributing network with current limiting reactor was analyzed, and the formula of current changing in short circuit transient process was deduced; according to the current changing formula, an engineering calculation formula of current limiting reactors impedance was derived. The case calculation shows that current limiting reactor meeting the need of the engineering calculation formula can reach the system current limiting requirement.

ENGINEERING ANALYSIS OF THE THREE-PHASE SHORT CIRCUIT MODE IN THE 10 KV ELECTRIC NETWORK TAKING INTO ACCOUNT THE INFLUENCE OF LOAD CURRENTS

2021 ◽  
pp. 74-83
Author(s):  
YURI D. VOLCHKOV ◽  
Keyword(s):  
Remote Monitoring ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Load Current ◽  
Electric Network ◽  
Operating Modes ◽  
Three Phase ◽  
Feed Network ◽  
Short Circuits ◽  
Switching Devices

Abstract. The load current aff ects the value of the short-circuit current in the electric network and, consequently, the voltage value. In some cases, this infl uence must be taken into account for the correct choice of switching devices, remote monitoring the operating modes of electric networks, and determining the modes. It is possible to disconnect loads connected through magnetic starters and contactors. Failure to consider the infl uence of the load current can lead to an incorrect interpretation of the identifi ed grid operating modes during remote monitoring and, as a result, incorrect dispatcher’s decisions. In addition, it is also insuffi cient to specify the choice of switching devices in the 10 kV feed network. The article describes a method for analyzing the three-phase short circuit mode in a 10 kV feed network, taking into account the infl uence of load currents. The method is exemplifi ed by the case of an actual electric network – the 10 kV ring feed network containing reclosers and receiving power from diff erent sections of lowvoltage buses of the “Kulikovskaya” 110/35/10 kV substation, belonging to the Branch of PJSC «DGC of Center”-“Orelenergo.” For this network, the values of the three-phase short-circuit currents at points with diff erent distances from the substation buses have been determined. The authors have fi guredout the values of the load currents and their shares in the total short-circuit current. The voltage values at different points of the network in the case of short circuits have also been determined. The research proves that the effect of the load current on the total short-circuit current should be taken into account for the case of remote short circuits.

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