A Concise Presentation of Doubly Fed Induction Generator Wind Energy Conversion Systems Challenges and Solutions

Table 1

Fault propagation inside a wind farm.

Fault	Fault at PCC; (HV terminals of wind farm transformer)	Fault at wind farm transformer LV terminals with connection	Fault at DFIG terminals with connected transformer	Fault at DFIG terminals with transformer of connection type other than
Three-phase	Type A	Type A	Type A	Type A
Single-phase	Type B	Type C	Type D	Type C
Phase to phase	Type C	Type D	Type C	Type D
Two-phase to ground	Type E	Type F	Type G	Type F

In this case, the characteristic voltage is (1/3 + 2/3 ) instead of being equal to .