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

Figure 7

THD signal for normal and islanding situations. (a) Test case states (1–5) UL 1740/1, (b) test case states (6–10) about variable loads, and (c) test case states (11–15) about various -factors.

(a)

(b)

(c)