Short-circuit test

About: Short-circuit test is a research topic. Over the lifetime, 366 publications have been published within this topic receiving 1552 citations.

Development of a 13.2 kV/630 A (8.3 MVA) High Temperature Superconducting Fault Current Limiter

Abstract: This paper deals with fabrication and development of a high temperature superconducting (HTS) fault current limiter (FCL) based on YBCO coated conductor (CC) wire for distribution systems. The capacity of the developed HTS FCL is 8.3 MVA and its rated voltage is 13.2 kV which corresponds to a three-phase power equipment voltage class of 22.9 kV. Tests of the developed prototype HTS FCL were conducted at Korea Electrotechnology Research Institute (KERI) accredited as a testing laboratory by the Korea Laboratory Accreditation Scheme (KOLAS). A short-circuit test and an AC dielectric withstand voltage test for the HTS FCL were conducted under sub-cooled liquid nitrogen (LN2 ) conditions of 3 bar and 65 K. The magnitude of an asymmetric short- circuit current without FCL reached 30 kApeak in a short-circuit test. The superconducting coil quenched instantaneously after the fault, and the magnitude of the fault current was limited to 3.6 kApeak within quarter cycle by the developed resistance of the superconducting coil. An AC dielectric withstand voltage test was performed, and the HTS FCL successfully withstood 143 kV for 1 minute. Also, it was found that there was no electrical or mechanical damage on the superconducting coil after the tests.

Numerical simulation of a power transformer using 3D finite element method coupled to circuit equation

Abstract: Most of the electromagnetic devices work connected to an electric circuit and their numerical simulation in 3D leads to a large number of unknowns. To deal with these problems we propose to use the T/sub 0//spl Omega/ formulation and describe the way of coupling magnetic and electric circuit equations. The coupling is obtained by expressing the electric vector potential T/sub 0/ from the current and the flux of induction and from the magnetic scalar potential /spl Omega/. To consider the magnetic nonlinearity we use the Newton-Raphson procedure. This formulation is used to model a 100 MVA power transformer short circuit test in the transient state. The same device is studied at no-load. >

Short circuit test performance of inductive high T/sub c/ superconducting fault current limiters

Abstract: The current limiting performance of inductive fault current limiters based on Bi-2212 high temperature superconducting tubes has been evaluated. Fault current limitation is due to the nonlinear impedance of this device when the induced current in the superconducting Bi-2212 tubes exceeds the critical current. A power load in a test circuit is first operated in nominal power conditions ( >

The Structure, Performance and Recovery Time of a 10 kV Resistive Type Superconducting Fault Current Limiter

Abstract: This paper presents the design and performance test of a 10 kV, 200 A resistive type superconducting fault current limiter prototype. This is the continued study of the test towards an individual current limiting module, which was done and published in August 2011. The construction of the whole prototype including the cryostat has finished. A series of tests including short circuit test, recovery test, auto-reclosure test, and LN2 boiling test have been performed and the results are presented in this paper. This single phase superconducting fault current limiter is made from 15 current limiting modules. Several 1-m long YBCO coated conductors prepared by Shanghai Jiaotong University are used to build the current limiting module. Each module has 2 tapes connected in parallel to carry 200 A rated current (Ic of each tape is about 150 A) and 6 tapes connected in series to withstand 700 ~ 800 V voltage drop.