Current Interruption in Air for a Medium-Voltage Load Break Switch

Jönsson, Erik; Aanensen, Nina Sasaki; Runde, M.

doi:10.1109/tpwrd.2013.2280300

Cited by 17 publications

(15 citation statements)

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“…Pada jaringan Loop tertutup, konfigurasi jaringan yang digunakan adalah Jaringan Spindel dengan melakukan beberapa perubahan, di antaranya merubah peralatan proteksi yang semula menggunakan Overcurrent dan Ground Fault relay menjadi line Differential Relay [14], yang posisinya diletakkan pada kubikel pelanggan sisi incoming dan outgoing. Karena pada kubikel pelanggan telah dipasang relay differential pada sisi incoming dan outgoing, maka Load Break Switch LBS [10] pada sisi Incoming dan Outgoing harus diganti juga dengan Circuit Breaker (CB), seperti pada gambar berikut: Perubahan berikutnya adalah pada gardu hubung jaringan spindel yang semula menggunakan LBS dengan posisi LBS terbuka saat kondisi normal, pada sistem loop tertutup LBS digantikan…”

Section: Pembahasan 31 Perubahan Jaringan Dari Spindel Ke Close Loopunclassified

Simulasi Modifikasi Konfigurasi Jaringan Spindel Menjadi Loop Tertutup Untuk Meningkatkan Keandalan Sistem Distribusi Menggunakan Software ETAP

Rizki¹

2021

energi

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Distribution reliability network rely on to any factor such as material quality, maintenance, operational pattern, protection device and also network configuration. In the spindle network the level of network reliability is level 3 (SPLN 52-3, 1983: 5). In order to leveling up the network reliability from level 3 to level 5 (zero down time)[2][3] we need to modify the protection system from overcurrent relay and ground fault relay to line differential relay in each distribution substation. Beside that Load Break Switch in each customer cubicle substation and in the connection substation should replaced by circuit breaker. Spindle network which operated open loop in the connection substation switch to normally close operated, so it can be called as closed loop network. This modification purpose is ther is no down time in case off ground fault or phase to phase sort circuit on the network cable. Before this kind of modification and the setting applied into real network, we make a simulation using an application called ETAP and no missmatch trip from 7 time experiment consist of ground fault and phase to phase short circuit in 7 cable

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Section: Pembahasan 31 Perubahan Jaringan Dari Spindel Ke Close Loopunclassified

Simulasi Modifikasi Konfigurasi Jaringan Spindel Menjadi Loop Tertutup Untuk Meningkatkan Keandalan Sistem Distribusi Menggunakan Software ETAP

Rizki¹

2021

energi

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“…In the cases where the test switch fails to interrupt, the laboratory circuitbreaker terminates the experiment. Further information on the laboratory circuit and setup, including photographs of the test rig and circuit components can be found elsewhere [6], [12].…”

Section: Test Object Dimensions and Materialsmentioning

confidence: 99%

“…In a previous study, a simple MV load break switch design where air is blown axially onto the arc was investigated with the objective of determining the influence of different design parameters on its current interrupting capability [6]- [9]. The present work compares the efficiency of such a straight axial flow design with two other flow concepts, namely a radial flow (also referred to as stagnation point flow) and a swirling axial flow, all by using simplified MV load break switch geometries in atmospheric, room temperature ambience.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Different Air Flow Concepts for a Medium Voltage Load Break Switch

Støa-Aanensen

Jönsson

Runde

2020

IEEE Trans. Power Delivery

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The research and development work towards a compact SF6-free load break switch for the medium voltage range has led to several design proposals. The interruption capability of three different nozzle and gas flow concepts with atmospheric air as the interrupting medium is compared and assessed. The three test switches are installed in circuits corresponding to the mainly active load and switch-fuse test duties of the 24 kV / 630 A load break switch standard. A pressure tank is used to provide different air flow rates, and the interruption capabilities of the different flow concepts are compared with basis in the tank pressure required to give successful interruptions. 270 current interruption tests were carried out. Air flows directed radially onto the arc or swirling along the arc turn out to result in a substantially better interruption performance than when the air flows straight and parallel to the arc. Air flows corresponding to upstream over-pressures of a few tenths of a bar seem to be sufficient for an air-based load break switch rated for 24 kV / 630 A.

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“…Although there are plenty of studies on the current interruption in high-voltage (HV) gas circuit breakers [31][32][33], vacuum interrupters [34], and medium voltage load breakers [35][36][37], only a few reviews on the low-speed load break switches, mostly relying on experimental findings without MHD simulations [38,39], are available. Just a few studies deal with simulations for VCB [40] and air breakers at a contact speed of about 2.5 m/s [33], which will result in a short gap before the CZ.…”

Section: Introductionmentioning

confidence: 99%

Effects of Fast Elongation on Switching Arcs Characteristics in Fast Air Switches

Kadivar

Niayesh

2020

Energies

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This paper is devoted to investigating the effects of high-speed elongation of arcs inside ultra-fast switches (ucontact≈ 5–80 m/s), through a 2-D time-dependent model, in Cartesian coordinates. Two air arcs in series, one between a stationary anode and a moving cathode and the other between a stationary cathode and a moving anode in the arc chamber, are considered. A variable speed experimental setup through a Thomson drive actuator is designed to support this study. A computational fluid dynamics (CFD) equations system is solved for fluid velocity, pressure, temperature, and electric potential, as well as the magnetic vector potential. Electron emission mechanisms on the contact surface and induced current density due to magnetic field changes are also considered to describe the arc root formation, arc bending, lengthening, and calculating the arc current density, as well as the contact temperatures, in a better way. Data processing techniques are utilized to derive instantaneous core shape and profiles of the arc to investigate thermo-electrical characteristics during the elongation progress. The results are compared with another experimentally verified magnetohydrodynamics model of a fixed-length, free-burning arc in the air. The simulation and experimental results confirm each other.

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Current Interruption in Air for a Medium-Voltage Load Break Switch

Cited by 17 publications

References 0 publications

Simulasi Modifikasi Konfigurasi Jaringan Spindel Menjadi Loop Tertutup Untuk Meningkatkan Keandalan Sistem Distribusi Menggunakan Software ETAP

Simulasi Modifikasi Konfigurasi Jaringan Spindel Menjadi Loop Tertutup Untuk Meningkatkan Keandalan Sistem Distribusi Menggunakan Software ETAP

Comparison of Different Air Flow Concepts for a Medium Voltage Load Break Switch

Effects of Fast Elongation on Switching Arcs Characteristics in Fast Air Switches

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