An increasing number of distributed generation units (DG

units) are connected to the distribution network. These

generators affect the operation and coordination of the

distribution network protection. The influence from DG units

that are coupled to the network with a power electronic

converter (PEC) is different from that of conventional DG

units with an electrical machine directly coupled to the

network. This contribution shows that PEC-based DG units

can be controlled in such a way that the negative influence on

the distribution network protection is limited. A decision tree

and a flow-chart are presented that show how a PEC-based

DG should respond to network faults. The flow-chart can be

used in real time to bring the proper control algorithm in

operation during a fault