A dual-functional bridge type FCL to restore PCC voltage

Abstract The bridge type Fault Current Limiter (FCL) can limit the fault current without any delay and smooth the surge current waveform. Therefore the DC reactor and fault current increase and the voltage of Point of Common Coupling (PCC) decrease gradually. The voltage sag of PCC would affect the loads on the parallel feeders connected to PCC. In this paper, to limit the fault current and restore the PCC voltage, the power quality improving function is proposed and integrated in the bridge type FCL. This function is realized by a resistor and parallel switch which are in series with DC reactor. It is shown that controlling turn on and turn off duration of switch, can not only limit the fault current but also restore the voltage of PCC during fault. The theory of proposed bridge type FCL for limiting the fault current and improving the power quality has been presented and its model has been simulated by PSCAD/EMTDC software. A test setup has been built and the measurement results have been compared with the simulation results. It is shown that the proposed FCL is superior over the conventional bridge type FCL.

[1]  T. Yazawa,et al.  Design and Test Results of 66 kV High-Tc Superconducting Fault Current Limiter Magnet , 2006, IEEE Transactions on Applied Superconductivity.

[2]  Toshifumi Ise,et al.  Reduction of inductance and current rating of the coil and enhancement of fault current limiting capability of a rectifier type superconducting fault current limiter , 2001 .

[3]  G. Pampin,et al.  An example in controlling short circuit levels in a large metropolitan area , 2003, 2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491).

[4]  D. J. Ward.  Power quality and the security of electricity supply , 2001 .

[5]  Sung-Yul Kim,et al.  Distribution reliability evaluation affected by superconducting fault current limiter , 2010, 2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-LA).

[6]  S. Quaia,et al.  Reducing voltage sags through fault current limitation , 2001 .

[7]  Tae Kuk Ko,et al.  Test of DC reactor type fault current limiter using SMES magnet for optimal design , 2002 .

[8]  M. T. Hagh,et al.  Nonsuperconducting Fault Current Limiter With Controlling the Magnitudes of Fault Currents , 2009, IEEE Transactions on Power Electronics.

[9]  Ieee staff.  2012 IEEE PES Transmission and Distribution Conference and Exposition (T&D) , 2012 .

[10]  Y. Shirai,et al.  Improvement of Power System Stability by Use of Superconducting Fault Current Limiter With ZnO Device and Resistor in Parallel , 2008, IEEE Transactions on Applied Superconductivity.

[11]  K. M. Salim,et al.  DC reactor effect on bridge type superconducting fault current limiter during load increasing , 2001 .

[12]  Sung-Hun Lim,et al.  Current Limiting Characteristics of Integrated Three-Phase Flux-Lock Type SFCL , 2006, IEEE Transactions on Applied Superconductivity.

[13]  B. Han,et al.  New configuration of UPQC for medium-voltage application , 2006, IEEE Transactions on Power Delivery.