Maximum allowable distributed generation considering fault ride through requirement and reach reduction of utility relay

Distribution systems are changing from one-source supplying structure into multi-source supplying structure with participations of distributed generations (DGs). These changes face problems caused by DGs. This paper considers typical problems such as system operating limits, reach reduction of utility relay, and fault ride through requirement from distribution system operators (DSOs) in order to maximize DG installation. A new fault calculation technique for a system with inverter-based DGs is revised and employed in an algorithm proposed for maximizing DGs. The IEEE 34 Node Test Feeder is then used to illustrate the effectiveness of the algorithm in determining the maximum allowable DG installed in this system.