Islanding Event Detection in Grid-Connected Distributed Generation Systems Using Unscented Kalman Filter

Figure 4

Results (normal operating conditions): (a) PV modal voltage, residual signal, 3^rd and 5^th voltage harmonics, and THD under load variation and (b) wind modal voltage, residual signal, 3^rd and 5^th voltage harmonics, and THD under load variation.

(a)

(b)