Fault current characteristics in distribution network interconnected with DFIG

Investigation of fault current behavior in interconnected distribution networks constitutes a crucial step in effective and reliable deployment of distributed energy resources (DER). However, in case of a doubly-fed induction generators (DFIG) equipped with ride-through (RT) capabilities, analysis of fault current contribution based on conventional methods such as sequence networks and Z-bus matrix is not reliable. The main purpose of this paper is to investigate fault current characteristics in a distribution network interconnected with DFIG system. The proposed methodology is to incorporate RT strategies in time domain in order to highlight transient behavior of fault current for different fault types and operating conditions. The outcome of this paper can be used to give insight for effective fault detection and coordination strategies which is crucial for improving the dependability and security of the protection system.