Internal electrical fault detection techniques in DFIG-based wind turbines: a review

Protection and Control of Modern Power Systems

Table 3 A comparison among different techniques used to detect DFIG both rotor and stator faults

References	Techniques	Advantages	Limitations
[30, 111, 112, 115,116,117, 119,120,121]	Fourier analysis	High accuracy	Affected by the change of speed and torque
[26]	Coupled-circuit	On-line	Affected by the geometry of the machine
[113]	Wavelet analysis	High accuracy	Time-consuming
[114, 123]	Finite element	High accuracy	Affected by the geometry of the machine
[122]	Magnetic equivalent circuit	High accuracy	Affected by the geometry of the machine
[124]	Magnetic flux	Identify fault location	Requires additional sensors
[123, 125, 126]	Artificial neural networks	Simple and fast	Requires Additional sensors