Abstract
The insertion of distributed generation systems into power distribution system raises the fault current and over-voltage magnitude under fault condition. Application of SFCL will helps to avoid the situation. SFCL is the combination of air-core type transformer and pulse width modulation inverter. By regulating converter output current, the mmf in air-core transformer is changed to produce high SFCL equivalent impedance during abnormal condition. This will limit short circuit current magnitude. In this paper the effect of SFCL can be analyzed using simulation model and mathematical derivation. The performance of the SFCL on short circuit current and over-voltage magnitude limiting characteristics can be analyzed when distributed generators are connected at different locations. The short circuit current and overvoltage limiting characteristics of SFCL is simulated in MATLAB software. The results from simulation model shows that SFCL plays an important role in minimizing the over-voltage magnitude and short circuit currents during abnormal conditions.
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