scholarly journals Development and Testing of a 252 kV/2500 A-40 kA Multi-Break Bus-Coupler Fast Vacuum Circuit Breaker

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4285
Author(s):  
Kui Ma ◽  
Xiaofei Yao ◽  
Luyang Zhang ◽  
Shaogui Ai ◽  
Shuhong Wang ◽  
...  
Keyword(s):  
High Velocity ◽  
Short Circuit ◽  
Circuit Breaker ◽  
Short Circuit Current ◽  
Test Results ◽  
Vacuum Circuit Breaker ◽  
In Series ◽  
Short Circuit Fault

It is effective to open the bus-coupler circuit breaker in case of a short-circuit fault. A fast vacuum circuit breaker (FVCB) is an ideal bus-coupler circuit breaker due to its high velocity. The objective of this study was to develop and test a 252 kV/2500 A-40 kA multi-break bus-coupler FVCB. The 252 kV FVCB contained 12 FVCB units. Each phase consisted of four FVCB units connected in series. Each FVCB unit had an electromagnetic repulsion mechanism with an average opening velocity reaching 6.5 m/s. Test results showed the opening time was 1.11 ± 0.08 ms. The capacitance of the voltage grading capacitor of each break was determined to be 10 nF. The prototype 252 kV bus-coupler FVCB passed all partial test duties according to the IEC 62271-100: 2008 and IEC 62271-1: 2007 standards, which include an insulation test and a terminal fault test among others. A 252 kV/2500 A-40 kA multi-break bus-coupler FVCB can be used to quickly cut off a short-circuit fault and effectively limit a short-circuit current.

scholarly journals Active Reduction of Short-Circuit Current in Power Distribution Systems

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 334
Author(s):  
Esteban Pulido ◽  
Luis Morán ◽  
Felipe Villarroel ◽  
José Silva
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Short Circuit ◽  
Circuit Breaker ◽  
Short Circuit Current ◽  
Power Converter ◽  
Power Distribution Systems ◽  
Power Distribution System ◽  
In Series

In this paper, a new concept of short-circuit current (SCC) reduction for power distribution systems is presented and analyzed. Conventional fault current limiters (FCLs) are connected in series with a circuit breaker (CB) that is required to limit the short-circuit current. Instead, the proposed scheme consisted of the parallel connection of a current-controlled power converter to the same bus intended to reduce the amplitude of the short-circuit current. This power converter was controlled to absorb a percentage of the short-circuit current from the bus to reduce the amplitude of the short-circuit current. The proposed active short-circuit current reduction scheme was implemented with a cascaded H-bridge power converter and tested by simulation in a 13.2 kV industrial power distribution system for three-phase faults, showing the effectiveness of the short-circuit current attenuation in reducing the maximum current requirement in all circuit breakers connected to the same bus. The paper also presents the design characteristics of the power converter and its associated control scheme.

Analysis of Dynamic Arc Parameters for Vacuum Circuit Breaker Under Short-Circuit Current Breaking

2019 ◽  
Vol 29 (2) ◽  
pp. 1-5 ◽  
Author(s):  
Hai Chen ◽  
Xiaoming Liu ◽  
Longnv Li ◽  
Yixiong Liu ◽  
Yaqian Zhang ◽  
...  
Keyword(s):  
Short Circuit ◽  
Circuit Breaker ◽  
Short Circuit Current ◽  
Vacuum Circuit Breaker

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.

scholarly journals Impact of Momentary Cessation Voltage Level in Inverter-Based Resources on Increasing the Short Circuit Current

2019 ◽  
Vol 11 (4) ◽  
pp. 1153 ◽  
Author(s):  
Namki Choi ◽  
Bohyun Park ◽  
Hwanhee Cho ◽  
Byongjun Lee
Keyword(s):  
Power Systems ◽  
Short Circuit ◽  
Circuit Breaker ◽  
Short Circuit Current ◽  
Fault Current ◽  
Test Results ◽  
Voltage Level ◽  
Fault Currents ◽  
Current Calculation ◽  
The Impact

This study analyzed the impact of varying the momentary cessation (MC) voltage level on the short circuit current of inverter-based resources (IBRs). To analyze the impact of the IBR MC function on the short circuit current, this paper proposes an advanced IBR model for fault current calculation to reflect its fault characteristics and a scheme for analyzing the influence of MC on the short circuit current. Based on the proposed methods, the authors conducted case studies using planning data from the Korea Electric Power Corporation (KEPCO). The influence of MC was investigated on the IBRs located at the southwest side of the KEPCO systems by screening the fault currents while varying the MC voltage. This paper demonstrates that the minimum MC voltage level needed for the fault current not to exceed the circuit breaker (CB) capacity can be proposed through analyzing the impact of MC voltage level on the short circuit current. The test results based on the proposed scheme showed that the short circuit current to power systems could not violate CB capacity if IBRs adjusted the MC voltage level higher than the lowest MC voltage level.

A New-Type Contact Structure of Vacuum Interrupters with the Saddle-Shaped Axial Magnetic Field Distribution

2012 ◽  
Vol 614-615 ◽  
pp. 1138-1141 ◽  
Author(s):  
Peng Sun ◽  
Cong Jun Xue
Keyword(s):  
Magnetic Field ◽  
Field Distribution ◽  
Axial Magnetic Field ◽  
Short Circuit ◽  
Circuit Breaker ◽  
Short Circuit Current ◽  
Magnetic Field Distribution ◽  
Vacuum Arc ◽  
Vacuum Circuit Breaker ◽  
Type Contact

The Axial Magnetic Field (AMF) applied to the arc vacuum column in the vacuum tube can make the vacuum arc keeping in diffusion state, provided that the short circuit current to be interrupt is within a critical value. In the results, the breaking ability of Vacuum Interrupters can be highly improved with the help of the AMF. The experimental study has proved that the AMF should be sufficient strong and have optimum distribution, in order to improve the breaking capacity of vacuum circuit breaker. This paper presents a novel axial magnetic contact with the concave axial magnetic field distribution and its 3-d simulation.

scholarly journals Modeling Operation of Liquid Metal Fuses When Breaking Overcurrents

2020 ◽  
Vol 178 ◽  
pp. 01060
Author(s):  
A V Kuznetsov ◽  
D S Aleksandrov ◽  
Y P Yurenkov
Keyword(s):  
Liquid Metal ◽  
Short Circuit ◽  
Time Moment ◽  
Circuit Breaker ◽  
Reference Points ◽  
Joint Operation ◽  
Pilot Studies ◽  
In Series ◽  
Current Limiter ◽  
Temperature Melting

This paper shows that successful switching of extremely high short-circuit currents I> 50 kA can be achieved by joint operation of a liquid-metal self-resetting current limiter and a circuit breaker connected in series. The type NFU-225 device from Mitsubishi was taken as an example. The time-current characteristic of joint operation of a liquid-metal self-resetting current-limiting device and a circuit breaker was compiled. However, further in the article physical processes occurring in a liquid-metal self-resetting current limiter with a complete transformation of fusible unit are considered. The result of work is modelling of operation of liquid-metal fuses when overcurrents are switched off based on the pilot studies obtained by the Japanese scientists. It is proposed to simulate the break process not at every time moment, but at specific time moments (reference points). At other time moments, current and voltage should be considered as approximately linearly changing characteristics. The work of current limiter can be represented by three stages: the pre-arc, the main arc and the final arc. If the current density is less than 1000 A/mm2, then the pre-arc operation stage of the current limiter includes the following sections for heating the fusible unit: primary heating to the melting temperature; melting and its transition to liquid state; secondary heating to evaporation temperature; evaporation of fusible unit.

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