TY - JOUR AU - Abdoli, Omid AU - Gholipour, E. AU - Hooshmand, R. TI - Improving the Transient Stability of Grid Connected Converter During Severe Voltage Drop by Virtual Impedance JO - Nashriyyah -i Muhandisi -i Barq va Muhandisi -i Kampyutar -i Iran VL - 19 IS - 2 SP - 135 EP - 141 PY - 2021 DO - ER -