Influence of fault current limiter on axial torsion torque of distributed power system

In this paper the influence of the insertion of the FCL to the connection point between the utility power source and the receiving end, where the distributed power generator is connected, is discussed. Numerical simulations are achieved by using the EMTDC/PSCAD. In particular, it is made clear that the insertion of the resistor type of the FCL increases the axial torsion torque of the distributed generator and that, while the reactor type of the FCL does not affect the torsion torque, it raises the delay of the network separation. The impedance type of the FCL is proposed to solve these problems. It consists of the resistor and the reactor, which have good characteristics of both of them.