**3. Simulation Testing Scenarios and Results**

The system is tested under the balance case between the DC load and PV in Table 2, and the procedure is as follows:


The model parameters are as follows:


**Table 2.** Normal and cancellation scenarios.


For the first test, the IDM will test two scenarios: normal and cancellation. The results are shown in the Figures 5 and 6.

**Figure 5.** Islanding detection result by using the IDM in [16] in normal scenario.

**Figure 6.** Islanding detection result by using the IDM in [16] in cancellation scenario.

The result in the normal scenario is shown in Figure 5, and the cancellation scenario result is shown in Figure 6. Figure 5 shows that the islanding condition is detected after 56(ms). The IDM cannot detect the islanding condition when the cancellation problem occurs. In closing, injecting two perturbation signals in the opposite directions can make the cancellation occur completely.

The impact of the injected signal cancellation on the islanding detection method is significant based on the results. The islanding detection method cannot detect the islanding phenomenon in the cancellation scenario.
