Islanding Detection for Microgrid Based on Frequency Tracking Using Extended Kalman Filter Algorithm

<table>Observed signal with noise and time-varying frequency. (a) Noise signal; (b) the observed signal with time-varying frequency and random noise.</table>

Journal of Applied Mathematics

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Figure 5

Figure 5: Islanding Detection for Microgrid Based on Frequency Tracking Using Extended Kalman Filter Algorithm 