Mitigation of FIDVR Using Solid State Transformer in Active Distribution Systems

The prevalent problem of delayed voltage recovery caused by fault (FIDVR), which leads to extended power restoration after faults and possibly cascading failures, affects the transmission and distribution systems. The FIDVR issue is exacerbated by the growing utilization of air conditioning (A/C) and the significant prevalence of induction motors. A novel approach for improving the (FIDVR) in active distribution networks (ADNs) through the optimized operation of solid-state transformers (SSTs) is presented in this paper. The suggested control strategy employs the untapped potential of SSTs to manage or regulate voltage within ADNs. This method allows SSTs to actively contribute to voltage regulation by managing reactive and active power. To validate the efficiency of this work, the IEEE 13-bus system, including both static and dynamic loads, is implemented using MATLAB/Simulink. The results demonstrate that SSTs can effectively mitigate FIDVR issues, enhancing the resilience and reliability of modern power systems, particularly under conditions of high reactive power absorption.